8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
1/333
TECHNICAL MANUAL
TM5-4120-384-14CHAPTER
APPEND
OPERATORS, ORGANIZATIONAL, DIRECT SUPPORT,
AND GENERAL SUPPORT MAINTENANCE MANUAL
AIR CONDITIONERHORIZONTAL COMPACT
18,0O0 BTU/HR
208 VOLT, 3 PHASE,
50/60 HERTZ
MODEL F18H-3S
(4120-01-165-1125)
This copy is a reprint which includes current
pages from Changes 1 through 4.
HEADQUARTERS, DEPARTMENT OF THE ARMY
27 MAY 1985
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
2/333
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
3/333
TM 5-4120-384-14
CHANGE
NO. 6
HEADQUARTERS
DEPARTMENT OF THE ARMY
WASHINGTON, D.C., 23 January 1996
Operat ors, Organ izational , Direct S upport
and General Suppor t Maintenance Manual
AIR CONDITIONER, HOR IZONTAL COMP ACT
18,000 BTU/HR, 208 VOLTS , 3 PH ASE, 50/60 HE RT Z
MODEL F18H-3S (4120-01-165-1125),
MODEL F18H-3SA (4120-01-237-4663),
MODEL F18H-3SB (4120-01-268-4451),
AND 230 VOLTS, SINGLE P HASE, 60 HE RTZ
MODEL F18H-1S (4120-01-268-4450)
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.
TM 5-4120-384-14, 27 May 1985, is changed as follows:
1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical barin the margin. An illustration change is indicated by a miniature pointing hand.
Remove pages Insert pages
B-11 an d B-12 B-11 and B-12
2. Retain this sheet in front of manual for reference purposes.
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
4/333
TM 5-4120-384-14
C 6
By Ord er o f the Secre ta ry of the Army:
DENNIS J. REIMER
General, United States Army
Chief of Staff
YVONNE M. HARRISON
Administrative Assistant to the
Secretary of the Amy0 1 2 2 1
DISTRIBUTION:
To be d i s t r ibu te d in accord an ce w i th D A For m 12-25-E , b lock n o . 2329, r eq u i r em en t s fo r
TM 5-4120-384-14.
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
5/333
TM 5-4120-384-14
C5
CHANGE
No. 5
HEADQUARTERS
DEPARTMENT OF THE ARMY
WASHIN GTON, D.C., 6 October 1995
Opera tors, Organ izationa l, Direct Support
and General ISuppor t Maintenance Manual
AIR CONDITIONER , HORIZONTAL COMP ACT,
18,000 BTU/HR , 208 VOLTS, 3 P HASE , 50/60 HE RT Z
MODEL F18H-3S (4120-01-165-1125),
MODEL F18H-3SA (4120-01-237-4663),
MODEL F18H-3SB (4120-01-268-4451),
AND 230 VOLTS, SINGLE P HASE, 60 HE RTZ
MODEL F13H-1S (4120-01-268-4450)
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited
TM 5-4120-384-14,27 May 1965, is changed as follows:
1. Remove and ins ert pages as indicated below. New or changed text m ater ial is indicated by a vertical bar
in the margin. An illustration change is indicated by a miniature pointing hand.
Remove pages Insert pages
iii and iv iii and iv
v and 1-0 v and I-0
4-13 through 4-16.4 4-13 through 4-16.4
4-16.5 through 4-16.10
2. Retain this sheet in front of manual for reference purposes.
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
6/333
TM 5-4120-384-14
C5
B y O r d e r o f t h e S ec r e t a r y o f t h e Ar m y :
Acting Administrative Assistant to the
Secretary of the Army00660
DENNIS J. REIMER
General, United States ArmyChief of Staff
DISTRIBUTION:
To be distributed in accordance with DA Form 12-25-E, block no. 2329, requirements for
TM 5-4120-384-14 .
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
7/333
T M 5 - 4 1 2 0 - 3 8 1 - 1 4C 1
CHANGE
NO. 4
HEADQUARTERSDEPARTMENT OF THE ARMY
WASHINGTON, D. C., 1 JULY 1992
Operat ors, Organ izational, Direct Support,
and General Support Maintenance Manual
AIR CONDITIONER, HORIZONTAL COMPACT,
18,000 BTU/HR, 208 VOLTS, 3 PHASE, 50/60 HERTZM O D E L F 1 8 H - 3 S ( 4 1 2 0 - 0 1 - 1 6 5 - 1 1 2 5 ) ,
M O D E L F 1 8 H - 3 S A ( 4 1 2 0 - 0 1 - 2 3 7 - 4 6 6 3 ) ,
M O D E L F 1 8 H - 3 S B ( 4 1 2 0 - 0 1 - 2 6 8 - 4 4 5 1 ) ,
AND 230 VOLTS, SINGLE PHASE, 60 HERTZ
M O D E L F 1 8 H - 1 S ( 4 1 2 0 - 0 1 - 2 6 8 - 4 4 5 0 )
Approved for public release; Distribution is unlimited
TM 5-4120-384-14, 27 May 1985 is chan ged as follows:
1. Remove and inser t pa ges as indicated below. New or changed text m ater ial is indicated by a vertical
bar in the margin. An illustration change is indicated by a miniature pointing hand.
Remove pages Insert pages
5-23 through 5-26 5-23 through 5-26
5-33 and 5-34 5-33 and 5-34
B-11 and B-12 B-11 and B-1 2E-1 a nd E-2 E-1 a nd E-2
2. Retain th is sheet in front of manu al for reference pur poses.
By Or der o f t he S ec r e t a r y o f t he Ar m y:
O f f i c i a l :
MILTON H. HAMILTON
Administrative Assistant to the
S ecretary of the Arm y01595
GORDON R. SULLIVAN
General, United States ArmyChief of Staff
DISTRIBUTION:
To be distributed in accordance with DA Form 1225E, (qty rqr block no. 2329).
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
8/333
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
9/333
CHANGE
NO. 3
T M 5 - 4 1 2 0 - 3 8 4 1
C3
HEADQUARTERS
DEPARTMENT OF THE ARMY
WASHINGTON, D.C., 20 NOVEMBER 1990
O p e r a t o r s , O r g a n i z a t i o n a l , D i r e c t S u p p o r t ,
a n d G e n e r a l S u p p o r t M a i n t e n a n c e M a n u a l
AIR CONDITIONER, HORIZONTAL, COMPACT,
18,000 BTU/HR, 208 VOLTS, 3 PHASE, 50/60 HERTZ
M O D E L F 1 8 H - 3 S ( 4 1 2 0 - 0 1 - 1 6 5 - 1 1 2 5 )
M O D E L F 1 8 H - 3 S A ( 4 1 2 0 - 0 1 - 2 3 7 - 4 6 6 3 )
M O D E L F 1 8 H -3SB (4120-01-268-4451)
AND 230 VOLTS, SINGLE PHASE, 60 HERTZ
M O D E L F 1 8 H - l S ( 4 1 2 0 - 0 1 - 2 6 8 - 4 4 5 0 )
A p p r o v e d f o r p u b l i c r e l e a s e ; d i s t r i b u t i o n i s u n l i m i t e d
T M 5 - 4 1 2 0 - 3 8 4 -1 4 , 2 7 M a y 1 9 8 5 , i s c h a n g e d a s f ol l o ws :
1 . R em ove a n d i n s e r t p a g e s a s i n d i c a t e d b e l o w . N e w or c h a n g e d t e x
m a t e r i a l i s i n d i c a t e d b y a v e r t i c a l b a r i n t h e m a r g i n . A n i l l u s t r a t i o n
c h a n g e i s i n d i c a t e d b y a m i n i a t u r e p oi n t i n g h a n d .
R e m o v e p a g e s I n s e r t p a g e s
2 - 1 5 t h r o u g h 2 - 1 8 2 - 1 5 t h r o u g h 2 - 1 8
2 . R e t a i n t h i s s h e e t i n f r o n t o f m a n u a l f or r e f e r e n c e p u r p o s e s ,
B y O r d e r o f t h e S e c r e t a r y o f t h e A r m y :
CARL E . VUONO
G en e r a l , U n i t ed S t a t e s A r m y
C h i e f o f S t a f f
O f f i c i a l :
THOMAS F. SIKORA
B r i g a d i e r G e n e r a l , U n i t e d S t a t e s A r m y
T h e A d j u t a n t G e n er a l
DISTRIBUTION :
T o b e d i s t r i b u t e d i n a c c o r d a n c e w i t h D A F o r m 1 2 2 5 E , ( q t y r q r b l o c k
no . 2329)
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
10/333
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
11/333
TM 5-4120-384
C 2
C H A N G E H E A D Q U A R T E R S
DEPARTMENT OF THE ARM
NO. 2 W AS H I N G T O N , D . C . 9 M A Y 1 9
O P E R A T O R S , O R G A N I Z A T I O N A L , D I R E C T S U P P O R T ,
A N D G E N E R A L S U P P O R T M A I N T E N A N C E M A N U A L
A I R C O N D I T I O N E R , H O R I Z O N T A L , C O M P A C T ,
1 8 , 0 00 B T U / H R , 2 0 8 VO L T S , 3 P H A S E , 5 0 /6 0 H E R T Z
M O D E L F 1 8 H - 3 S ( 4 1 2 0 -0 1 - 1 6 5 - 1 1 2 5 ) ,
M O D E L F 1 8 H - 3 S A ( 4 1 2 0 - 0 1 - 2 3 7 - 4 6 6 3 ) ,
M O D E L F 1 8 H - 3 S B ( 4 1 2 0 -0 1 - 2 6 8 - 4 4 5 1 ) ,
A N D 2 3 0 VO L T S , S I N G L E P H A S E , 6 0 H E R T Z
M O D E L F 1 8 H - 1 S ( 4 1 2 0 - 0 1 - 2 6 8 - 4 4 5 0 )
TM 5-4120-384-14 , 27 M ay 1985 , i s changed as fo l low s :
1. T i t l e i s c h a n g e d a s s h o w n a b o v e .
2. R e m o v e a n d i n s e r t p a g e s a s i n d i c a t e d b e l o w . N e w o r c h a n g e d t e x t m a t e r i
i s i n d i ca t e d b y a v e r t i ca l b a r i n t h e m a r g i n . A n i l l u s t r a t i o n c h a n g e i s i n d i c a t e d
b y a m i n i a t u r e p o i n t i n g h a n d .
Remove pages I n s e r t p a g e s
i t h r ou g h i vv / v i
1 - 1 t h r o u g h 1 - 4
1 - 8 . 1 a n d 1 - 8 . 2
1-9 and 1-10
2 - 1 3 a n d 2 - 1 4
4 - 1 t h r o u g h 4 - 6
4 - 6 . 1 t h r o u g h 4 - 6 . 3 / 4 - 6 . 4
4 - 7 t h r o u g h 4 - 1 0
4 - 1 3 t h r o u g h 4 - 1 6- - - -
4 - 1 7 t h r o u g h 4 - 2 0
4 - 3 7 t h r o u g h 4 - 4 2
4 - 4 2 . 1 a n d 4 - 4 2 . 24 - 4 7 t h r o u g h 4 - 5 2
4 - 6 3 a n d 4 - 6 4
4-71 and 4-72
4 - 7 5 t h r o u g h 4 - 9 0- - - -
4 - 9 1 t h r o u g h 4 - 1 0 2
4 - 1 0 5 t h r o u g h 4 - 1 0 8
4 - 1 1 1 t h r o u g h 4 - 1 1 6
i t h r o u g h i vv and 1-0
1 - 1 t h r o u g h 1 - 4
l - 8 . 2 a n d 1 - 8 . 2
1 - 9 a n d 1 - 1 0
2 - 1 3 a n d 2 - 1 4
4 - 1 t h r o u g h 4 - 6
4 - 6 . 1 t h r o u g h 4 - 6 . 3 / 4 - 6
4 - 7 t h r o u g h 4 - 1 0
4 - 1 3 t h r o u g h 4 - 1 6
4 - 1 6 . 1 t h r o u g h 4 - 1 6 . 4
4 - 1 7 t h r o u g h 4 - 2 0
4 - 3 7 t h r o u g h 4 - 4 2
4 - 4 2 . 1 a n d 4 - 4 2 . 24 - 4 7 t h r o u g h 4 - 5 2
4 - 6 3 a n d 4 - 6 4
4 - 7 1 a n d 4 - 7 2
4 - 7 5 t h r o u g h 4 - 9 0
4 - 9 0 . 1 t h r o u g h 4 - 9 0 . 4
4 - 9 1 t h r o u g h 4 - 1 0 2
4 - 1 0 5 t h r o u g h 4 - 1 0 8
4 - 1 1 1 t h r o u g h 4 - 1 1 6
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
12/333
TM5-4120-384-14
C2
Remove pages
5 - 1 5 t h r o u g h 5 - 1 8
5 - 2 2 . 1 a n d 5 - 2 2 . 2
5 - 2 5 t h r o u g h 5 - 2 8
5 - 3 3 t h r o u g h 5 - 4 0
5 - 4 3 t h r o u g h 5 - 7 65-83 and 5-84
B-7 and B-8
I n d e x 3 a n d I n d e x 4
I n s e r t p a g e s
5 - 1 5 t h r o u g h 5 - 1 8
5 - 2 2 . 1 a n d 5 - 2 2 . 2
5 - 2 5 t h r o u g h 5 - 2 8
5 - 3 3 t h r o u g h 5 - 4 0
5 - 4 3 t h r o u g h 5 - 7 65-83 and 5-84
B-7 and B-8
I n d e x 3 a n d I n d e x 4
3 . R e t a i n t h i s s h e e t i n f r on t o f m a n u a l for r e fe r e n c e p u r p o s e s .
By Order of the Secretary of the Army:
CARL E . VUONO
Gen era l , Un i t ed S ta t e sa Arm yOfficial: C h ie f of S ta f f
R. L. DILWORTH
B r ig a d ie r Gen era l , Un i t ed S ta t e s Arm y
T h e A d j u t a n t G e n er a l
DISTRIBUTION:
T o b e d i s t r i b u t e d i n a c c o r d a n c e w i t h D A F o r m 1 2 - 2 5 A , O p e r a t o r , U n i t , D i r e c t
S u p p o r t a n d G e n e r a l S u p p o r t M a i n t e n a n c e R e q u i r e m e n t s f o r A i r C o n d i t i o n e r ,
Hor izonta l Compact , 18,000 BTU, 208V, 3PH, 50/60HZ (F18H-3S) .
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
13/333
TM5-4120-384-1
C 1
CHANGE
No 1
HEADQUARTERS
DEPARTMENT OF THE ARMY
W A S H I N G T O N , D.C., 17 December 1986
O p e r a t o r s , O r g a n i z a t i on a l , D i r e c t S u p p o r t
a n d G e n e r a l S u p p o r t M a i n t e n a n c e M a n u a l
AIR CONDITIONER, HORIZONTAL, COMPACT,18,000 BTU/HR
208 VOLTS, 3 PHASE, 50/60 HERTZ
MODEL F18H-3S
( 4 1 2 0 - 0 1 - 1 6 5 - 1 1 2 5 )
AND MODEL F18H-3SA
( 4 1 2 0 - 0 1 - 2 3 7 - 4 6 6 3 )
TM 5-4120-384-14 , 27 M ay 1985 , i s changed as fo l low s :
1. T i t l e i s c h a n g e d a s s h o w n a b o v e .
2. R e m o v e a n d i n s e r t p a g e s a s i n d i c a t e d b e l o w . N e w o r c h a n g e d t e x t m a t e r i a l
i s i n d i ca t e d b y a v e r t i ca l b a r i n t h e m a r g i n . A n i l l u s t r a t i o n c h a n g e i s i n d i c a t e d
b y a m i n i a t u r e p o i n t i n g h a n d .
Remove pages I n s e r t p a g es
i t h r o u g h i v
1-0
1 - 1 t h r o u g h 1 - 6- - -
2 - 1 t h r o u g h 2 - 6
2 - 9 t h r o u g h 2 - 1 6
3-1 and 3-2
4 - 3 t h r o u g h 4 - 6
4 - 7 a n d 4 - 8
4-11 and 4-12
4-21 and 4-22
4 - 3 7 t h r o u g h 4 - 4 2- - -
4 - 4 3 t h r o u g h 4 - 5 4
4 - 7 5 t h r o u g h 4 - 8 8
4-91 and 4-92
4 - 9 5 t h r o u g h 4 - 1 0 2
4 - 1 0 5 t h r o u g h 4 - 1 0 8
4 - 1 1 1 t h r o u g h 4 - 1 1 8
5 - 1 5 t h r o u g h 5 - 1 8- - -
- - -
5 - 4 3 t h r o u g h 5 - 7 6
5-83 and 5-84
i t h r o u g h i v
1-0
1 - 1 t h r o u g h 1 - 6
1 - 8 . 1 a n d 1 - 8 . 2
2 - 1 t h r o u g h 2 - 6
2 - 9 t h r o u g h 2 - 1 6
3 - 1 a n d 3 - 2
4 - 3 t h r o u g h 4 - 6 . 3 / 4 - 6 . 4
4 - 7 a n d 4 - 8
4 - 1 1 a n d 4 - 1 2
4 - 2 1 a n d 4 - 2 2
4 - 3 7 t h r o u g h 4 - 4 2
4 - 4 2 . 1 a n d 4 - 4 2 . 2
4 - 4 3 t h r o u g h 4 - 5 4
4 - 7 5 t h r o u g h 4 - 8 8
4 - 9 1 a n d 4 - 9 2
4 - 9 5 t h r o u g h 4 - 1 0 2
4 - 1 0 5 t h r o u g h 4 - 1 0 8
4 - 1 1 1 t h r o u g h 4 - 1 1 8
5 - 1 5 t h r o u g h 5 - 1 85 - 1 8 . 1 a n d 5 - 1 8 . 2
5 - 2 2 . 1 a n d 5 - 2 2 . 2
5 - 4 3 t h r o u g h 5 - 7 6
5-83 and 5-84
3 . R e t a i n t h i s s h e e t i n f r on t o f m a n u a l f or r e fe r e n c e p u r p o s e s .
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
14/333
TM5-4120-3E14-14
C 1
By Order of the Secre ta ry of the Army:
Official:
J OHN A. WICKHAM, J R.
G e n e r a l , U n i t e d S t a t e s A r m yChief o f S ta f f
R. L. DILWORT HBrigad ier Genera l , Uni ted S ta tes Arm y
Th e Ad ju ta n t Gen era l
DISTRIBUTION:
To be distr ibut ed in a ccordan ce with DA Form 12-25A, Opera tors, Organ izationa l, Direct
Support and General Support Maintenance Requirements for Air Condit ioner, Horizontal
Compact, 18,000 BTU, 208V, 3PH, 50/60HZ (F18H-3S)
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
15/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
T h e p a n e l s , d o o r s , a n d s c r e e n s o n t h i s
p u r p o s e .
D o n o t o p e r a t e t h i s u n i t w i t h t h e m o f f
u n i t a r e t h e r e f o r a
o r o p e n u n l e s s t h e
i n s t r u c t i o n s t e l l y o u t o . W h e n t h i s i s n e c e s s a r y , d o s o w i t h c a r e .
A l l e l e c t r i c a l c o n n e c t i o n s c a n s h o c k a n d s o m e t i m e s k i l l .
M o v i n g p a r t s c a n c u t o f f f i n g e r s o r h a n d s .
D o n o t w e a r l o o s e c l o t h i n g n e a r m o v i n g p a r t s s u c h a s f a n s a n d
s h a f t s .
R e a d a l l W a r n i n g s a n d i n s t r u c t i o n s c a r e f u l l y b e f o r e o p e r a t i n g o r
w o r k i n g o n t h i s u n i t . R e a d a n d u n d e r s t a n d a l l W a r n i n g s l i s t e d i n
t h e f r o n t o f t h i s m a n u a l .
R E F R I G E R AN T U N D E R P R E S S U R E
i s u s e d i n t h e o p e r a t i o n o f t h i s e q u i p m e n t .
DEATH
o r s e v e r e i n j u r y m a y r e s u l t i f y o u f a i l t o
o b s e r v e s a f e t y p r e c a u t i o n s .
N e v e r u s e a h e a t i n g t o r c h o n a n y p a r t t h a t c o n t a i n s R e f r i g e r a n t R -
2 2 . D o n o t l e t l i q u i d r e f r i g e r a n t t o u c h y o u a n d d o n o t i n h a l e
r e f r i g e r a n t g a s .
DANGEROUS CHEMICAL
i s u s e d i n t h i s e q u i p m e n t .
DEATH
o r s e v e r e i n j u r y m a y r e s u l t i f p e r s o n n e l f a i l
t o o b s e r v e s a f e t y p r e c a u t i o n s .
U s e g r e a t c a r e t o a v o i d c o n t a c t w i t h l i q u i d r e f r i g e r a n t o r
r e f r i g e r a n t g a s b e i n g d i s c h a r g e d u n d e r p r e s s u r e . S u d d e n a n d
i r r e v e r s i b l e t i s s u e d a m a g e c a n r e s u l t f r o m f r e e z i n g . W e a r t h e r m a l
p r o t e c t i v e g l o v e s a n d a f a c e p r o t e c t o r o r g o g g l e s i n a n y s i t u a t i o n
w h e r e s k i n - e y e - c o n t a c t i s p o s s i b l e .
P r e v e n t c o n t a c t o f r e f r i g e r a n t g a s w i t h f l a m e o r h o t s u r f a c e s .
H e a t c a u s e s t h e r e f r i g e r a n t t o b r e a k d o w n a n d f o r m c a r b o n y l
c h l o r i d e ( p h o s g e n e ) , a h i g h l y t o x i c a n d c o r r o s i v e g a s .
a
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
16/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
WARNING
HIGH VOLTAGE
i s u s e d i n t h e o p e r a t i o n o f t h i s e q u i p m e n t .
DEATH ON CONTACT
m a y r e s u l t i f p e r s o n n e l f a i l t o o b s e r v e s a f e t y p r e c a u t i o n s .
R e m o v e p e r s o n a l i t e m s s u c h a s w a t c h e s a n d r i n g s p r i o r t o w o r k i n g o n
t h i s e q u i p m e n t
N e v e r w o r k o n e l e c t r i c a l e q u i p m e n t u n l e s s t h e r e i s a n o t h e r p e r s o n
n e a r b y w h o i s f a m i l i a r w i t h t h e o p e r a t i o n a n d h a z a r d s o f t h e
e q u i p m e n t a n d w h o i s c o m p e t e n t i n a d m i n i s t e r i n g f i r s t a i d . When
t h e t e c h n i c i a n i s a i d e d b y op e r a t o r s h e m u s t w a r n t h e m a b o u t
d a n g e r o u s a r e a s .
W h e n e v e r p o s s i b l , t h e i n p u t p o w e r s u p p l y t o t h e e q u i p m e n t m u s t b e
s h u t o f f b e f o r e b e g i n n i n g w o r k o n t h e e q u i p m e n t . T a k e p a r t i c u l a r
c a r e t o g r o u n d e v e r y c a p a c i t o r l i k e l y t o h o l d a d a n g e r o u s
p o t e n t i a l . W h e n w o r k i n g i n s i d e t h e e q u i p m e n t , a f t e r t h e p o w e r h a s
b e e n t u r n e d o f f , a l w a y s g r o u n d e v e r y P a r t b e f o r e t o u c h i n g i t .-
B e c a r e f u l n o t t o c o n t a c t h i g h - v o l t a g e c o n n e c t i o n s o f 2 0 8 v o l t s a c
i n p u t w h e n i n s t a l l i n g o r o p e r a t i n g t h i s e q u i p m e n t .
W h e n e v e r t h e n a t u r e o f t h e o p e r a t i o n p e r m i t s , k e e p on e h a n d a w a y
f r o m t h e e q u i p m e n t t o r e d u c e t h e h a z a r d o f c u r r e n t f l o w i n g t h r o u g h
v i t a l o r g a n s o f t h e b o d y .
D o n o t o p e r a t e t h e e q u i p m e n t w i t h o u t a l l g r i l l e s , g u a r d s , l o u v e r s ,
a n d c o v e r s i n p l a c e a n d t i g h t l y s e c u r e d .
W a r n i n g : D o n o t b e m i s l e d b y t h e t e r m l o w v o l t a q e . P o t e n t i a l s
a s l o w a s 5 0 v o l t s m a y c a u s e d e a t h u n d e r a d v e r s e c o n d i t i o n s .
A c e t o n e a n d m e t h y l - e t h y l k e t o n e ( M E K ) a r e f l a m m a b l e a n d t h e i r
v a p o r s c a n b e e x p l o s i v e . R e p e a t e d o r p r o l o n g e d s k i n c o n t a c t o r
i n h a l a t i o n o f v a p o r s c a n b e t o x i c . U s e a w e l l - v e n t i l a t e d a r e a ,
w e a r g l o v e s t a n d k e e p a w a y f r o m s p a r k s o r f l a m e .
b
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
17/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
C l e a n p a r t s i n a w e l l v e n t i l a t e d a r e a . A v o i d i n h a l a t i o n o f s o l v e n tf u m e s a n d p r o l o n g e d e x p o s u r e o f s k i n t o c l e a n i n g s o l v e n t . Wash
e x p o s e d s k i n t h o r o u g h l y .
D r y c l e a n i n g s o l v e n t ( F e d S p e c . P - D - 6 8 0 ) u s e d t o c l e a n p a r t s i s
p o t e n t i a l l y d a n g e r o u s t o p e r s o n n e l a n d p r o p e r t y .
D o n o t u s e n e a r o p e n f l a m e o r e x c e s s i v e h e a t . F l a s h p o i n t o f
s o l v e n t i s 1 0 0 F t o 1 3 8 F ( 3 8 C t o 5 0 C ) .
W e a r e y e p r o t e c t i o n w h e n b l o w i n g s o l v e n t f r o m p a r t s . A i r p r e s s u r e
s h o u l d n o t e x c e e d 3 0 p s i g ( 2 . 1 k g / c m2) .
C o m p r e s s e d a i r u s e d f o r c l e a n i n g p u r p o s e s
( 2 . 1 k g / c m2) .
w i l l n o t e x c e e d 3 0 p s i
T h e b u r n i n g o f p o l y u r e t h a n e f o a m s i s d a n g e r o u s .
D u e t o t h e c h e m i c a l c o m p o s i t i o n o f a p o l y u r e t h a n e f oa m , t o x i c f u m e s
a r e r e l e a s e d w h e n i t i s b u r n e d o r h e a t e d . I f i t i s b u r n e d o r
h e a t e d i n d o o r s , s u c h a s d u r i n g a w e l d i n g o p e r a t i o n n e a r b y , y o u
s h o u l d t a k e c a r e t o v e n t i l a t e t h e a r e a t h o r o u g h l y . A n e x h a u s t
s y s t e m l i k e t h a t o f a p a i n t s p r a y b o o t h s h o u l d b e u s e d .
A i r - s u p p l i e d r e s p i r a t o r s , a p p r o v e d b y t h e N a t i o n a l I n s t i t u t e f o r
O c c u p a t i o n a l S a f e t y a n d H e a l t h o r t h e U . S . B u r e a u o f M i n e s , s h o u l db e u s e d f o r a l l w e l d i n g i n c o n f i n e d s p a c e s a n d i n p l a c e s w h e r e
v e n t i l a t i o n i s i n a d e q u a t e .
P e r s o n s w h o h a v e c h r o n i c o r r e c u r r e n t r e s p i r a t o r y c o n d i t i o n s ,
i n c l u d i n g a l l e r g i e s a n d a s t h m a , s h o u l d n o t w o r k i n t h e s e a r e a s .
c / ( d b l a n k )
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
18/333
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
19/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
TECHNICAL MANUAL HEADQUARTERS
DEPARTMENT OF THE ARMY
NO. 5 - 4 1 2 0 - 3 8 4 - 1 4 W AS H I N G T O N , D . C . , 27 May 1985
O p e r a t o r s , O r g a n i z a t i o n a l , D i r e c t S u p p o r t
a n d G e n e r a l S u p p o r t M a i n t e n a n c e M a n u a l
AIR CONDITIONER, HORIZONTAL, COMPACT,
1 8 , 0 0 0 B T U / H R2 08 VO LT S, 3 P H AS E , 50 /6 0 H E R T Z
M O D E L F 1 8 H - 3 S ( 4 1 2 0 - 0 1 - 1 6 5 - 1 1 2 5 ) , M O D E L F 1 8 H - 3 S A ( 4 1 2 0 - 0 1 -2 3 7 - 4 6 6 3 )
M O D E L F 1 8 H - 3 S B ( 4 1 2 0 - 0 1 - 2 6 8 -4 4 5 1 )
AND2 3 0 V O L T S , SIN G LE PH A SE 60 H ER TZ
M O D E L F 1 8 H - 1 S ( 4 1 2 0 - 0 1 - 2 6 8 - 4 4 5 0 )
REP ORTING ERRORS AND RECOMMEND IMP ROVEMENTS
Y o u ca n h e l p i m p r o v e t h i s m a n u a l . I f y o u f i n d a n y m i s t a k e s
o r i f y ou k n o w o f a w a y t o i m p r o v e t h e p r o c e d u r e s , p l e a s e
l e t u s k n o w . M a i l y o u r l e t t e r , D A F o r m 2 0 2 8 ( R e co m m e n d e d
C h a n g e s t o P u b l i c a t i o n s a n d B l a n k F o r m s ) or D A F o r m 2 0 2 8 - 2
l o c a t e d i n t h e b a c k o f t h i s m a n u a l d i r e c t t o : C om m a n d e r ,
U . S . Ar m y T r o op S u p p o r t C o m m a n d , A t t e n t i o n : AMSTR-MCTS,
4 3 0 0 G o o d f e l l o w B o u l e v a r d , S t . L o u i s , M i s s o u r i 6 3 1 2 0 - 1 7 9 8 .
A r e p l y w i l l b e f u r n i s h e d t o y o u .
C H A P T E R 1 INTROUCUTION
TABLE OF CONTENTS
P a g e
. . . . . . . . . . . . . . . . . . . . . . . 1 - 1
S e c t i o n I General Information . . . . . . . . . . . . . . . . . . . . . 1 - 1
S e c t i o n I I Equipment Description . . . . . . . . . . . . . . . . . . . 1 - 2
S e c t i o n I I I T e c h n i c a l P r i n c i p l e s o f O p e r a t i o n . . . . . . . 1 - 9
CHAP TER 2 OPERATING INSTROUCTIONS . . . . . . . . . . . . . . . . .
S e c t i o n I D e s c r i p t i o n a n d U s e o f O p e r a t o r s
Controls and Indicators . . . . . . . . . . . . . . . . .
S e c t i o n I I P r e v e n t i v e M a i n t e n a n c e C h e c k s a n d
Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . .S e c t i o n I I I O p e r a t i o n U n d e r U s u a l C o n d i t i o n s . . . . . . . .
S e c t i o n I V O p e r a t i o n U n d e r U n u s u a l C on d i t i o n s . . . . . .
CHAP TER 3 OPERATOR'S MAINTENANCE INSTRUCTIONS
S e c t i o n I Lubr i ca t ion Ins t ruc t ions . . . . . . . . . . . . . . . .
S e c t i o n I I Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .
2 - 1
2 - 1
2 - 62 - 9
2 - 1 5
3 - 1
3 - 1
3 - 1
C h a n g e 2 i
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
20/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
T A B L E O F C O N T E N T S - C o n t i n u e d
P a g e
CHAPTER 4 ORGANIZATIONAL MAINTENANCE
INSTRUCTIONS . . . . . . . . . . . . .
S e c t i o n I R e p a i r P a r t s , S p e c i a l T o o l s , T M D E , a n dSupport Equipment . . . . . . . . . . . . . . . . . . . . . . .
S e c t i o n I I S e r v i c e U p o n R e c e i p t o f E q u i p m e n t . . . . . . .
S e c t i o n I I I P r e v e n t i v e M a i n t e n a n c e C h e c k s a n d
Services (PMCS) . . . . . . . . . . . . . . . . . . . . . . . . .
S e c t i o n I V T r o u b l e s h o o t i n g . . . . . . . . . . . . . . . . . . . . . . . . .
S e c t i o n V Maintenance Procedures . . . . . . . . . . . . . . . . . .
S e c t i o n V I P r e p a r a t i o n fo r S t o r a g e or S h i p m e n t . . . . .
CHAP TE R 5 DIRECT SUP P ORT MAINTENANCE
INSTRUCTIONS . . . . . . . . . . . . .
S e c t i o n I R e p a i r P a r t s , S p e c i a l TO Ol s , T M D E , a n d
Support Equipment . . . . . . . . . . . . . . . . . . . . . . .S e c t i o n I I Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .
S e c t i o n I I I Maintenance Procedures . . . . . . . . . . . . . . . . . .
CHAPTER 6 GENERAL SUPPORT MAINTENANCE
INSTRUCTIONS . . . . . . . . . . . .
S e c t i o n I R e p a i r P a r t s , S p e c i a l T o o l s , T M D E , a n d
Support Equipment . . . . . . . . . . . . . . . . . . . . . . .
S e c t i o n I I A u t h o r i z e d G e n e r a l S u p p o r t M a i n t e n a n c e
Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX A. R EFER EN C ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A P P E N D I X B . M A I N T E N A N C E A L L O C A T O I N C H A R T . . . . . . . . . . .
S e c t i o n I Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S e c t i o n I I M ain tenance A l loca t ion C har t . . . . . . . . . . . .
S e c t i o n I I I T oo l a n d T e s t E q u i p m e n t R e q u i r e m e n t s . . . .
S e c t i o n I V Remarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX C. COMPONENTS OF END ITEM AND
B A S I C I S S U E I T E N L I S T S . . . . . . . . . . . . .
S e c t i o n I Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S e c t i o n I I Components of End Item . . . . . . . . . . . . . . . . . .
S e c t i o n I I I Basic Issue Items . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX. D. ADDITIONAL AUTHORIZATION LIS T . . . . . . . . . .
S e c t i o n I Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . .
S e c t i o n I I A d d i t i o n a l A u t h o r i z a t i o n L i s t . . . . . . . . . . .
4 - 1
4 - 2
4 - 3
4 - 2 0
4 - 2 8
4 - 3 7
4 - 1 1 9
5 - 1
5 - 25 - 3
5 - 1 2
6 - 1
6 - 1
6 - 1
A - 1
B -1
B - 1
B - 5
B - 1 1B - 1 2
C - 1
C - 1
C - 3
C - 4
D -1
D -1
D -1
i i
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
21/333
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
22/333
TM 5-4120-384-14
L I S T O F I L L U S T R A T I O N S
F i g u r e T i t l e
4-18 T E M P E R A T U R E S E L E C T O R ( C o n t r o l
S w i t c h T h e r m o s t a t ) S 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 1 9 MODE SE LE CTOR Swit ch S1 . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 2 0 C O M P R C I R C U I T B K R ( C o m p r e s s o r
C i r c u i t B r e a k e r ) C B 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 2 1 C o n t r o l M o d u l e W i r i n g H a r n e s s . . . . . . . . . . . . . . . . . . .
4 - 2 2 J u n c t i on B o x . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 2 3 J u n c t i on B o x W i r i n g H a r n e s s . . . . . . . . . . . . . . . . . . . . .
4 - 2 4 R e l a y s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 2 5 CONTROL CIRCUIT BREAKER CB2 . . . . . . . . . . . . . . . . . . . . .
4 - 2 6 M i s c e l l a n e o u s C a b l e s , H a r n e s s e s ,
a n d T e r m i n a l B o a r d s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 2 7 Transformer and Rectifier . . . . . . . . . . . . . . . . . . . . . . . .
4 - 2 7 . 1 C a p a c i t o r s a n d R e l a y , M o d e l F 1 8 H 1 S o n l y . . . . . .
4 - 2 8 E v a p o r a t o r F a n , M o t o r a n d H o u s i n g . . . . . . . . . . . . . .
4 - 2 9 H e a t e r T h e r m o s t a t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 3 0 H e a t e r E l e m e n t s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 3 1 C o n d e n s e r F a n , M ot o r a n d H o u s i n g . . . . . . . . . . . . . . .
4 - 3 2 Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 3 3 Solenoid Valve Coil Removal . . . . . . . . . . . . . . . . . . . . .
4 - 3 4 J u m p e r A cr o s s L P C O S w i t c h . . . . . . . . . . . . . . . . . . . . . . . .
4 - 3 5 C o n d e n s e r C oi l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 - 3 6 C o n n e c t o r s ( I n s t a l l a t i o n ) . . . . . . . . . . . . . . . . . . . . . . . .
4 - 3 7 Installation Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 1 M o t o r A s s e m b l y , C u s t o m M o t o r D e s i g n ,
M o d e l 1 8 4 - 0 1 0 4 1 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 1 . 1 M o t o r A s s e m b l y , K e c o I n d u s t r i e s , I n c . ,
M o d e l 1 1 3 K 0 0 0 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 2 M o t o r A s s e m b l y , W e l c o ,
M o d e l M 4 7 2 0 - 5 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 3 M o t o r A s s e m b l y , C u s t om M ot o r D e s i gn ,
M o d e l 7 0 0 0 1 0 6 0 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 3 . 1 M o t o r A s s e m b l y , K e c o I n d u s t r i e s , I n c . ,
M o d e l 1 1 3 K 0 0 0 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 4 D i s c h a r g i n g R e f r i g e r a n t . . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 5 N i t r o g e n T a n k C o n n e c t i o n . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 6 E v a c u a t i o n o f R e f r i g e r a n t S y s t e m . . . . . . . . . . . . . . .
5 - 7 R e f r i g e r a n t C h a r g i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 8 E v a p o r a t o r C o i l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 - 9 F l u i d F l o w R e s t r i c t o r . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-10 E x p a n s i o n V a l v e ( P r i m a r y ) . . . . . . . . . . . . . . . . . . . . . . . .
5-11 E x p a n s i o n V a l v e ( Q u e n c h ) . . . . . . . . . . . . . . . . . . . . . . . . .
5-12 Solenoid Valves . . . . . . . . . . . . . . . . . . . . . . . . . .
5-13 P r e s s u r e R e g u l a t o r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-14 A c t u a t i n g C y l i n d e r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P a g e
4-67
4-69
4-72
4-74
4-77
4 - 7 9
4 - 8 0
4-84
4 - 8 6
4-88
4-90.2
4-92
4 - 9 6
4 - 9 9
4-102
4-107
4-109
4-112
4-114
4-116
4-118
5-16
5-17.1
5-19
5-21
5-22.1
5-24
5-26
5-33
5-35
5-43
5 - 4 6
5 - 4 9
5-51
5-54
5 - 5 6
5 - 5 8
iv C h a n g e 2
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
23/333
TM 5-4120-384-14
L I S T O F I L L U S T R A T I O N S
F i g u r e T i t l e
5 - 1 5
5 - 1 6
5 - 1 7
5 - 1 8
5 - 1 9
5 - 2 0
5 - 2 1
5 - 2 2
T a b l e
2 - 1
2 - 2
3 - 1
4 - 1
4 - 24 - 3
5 - 1
5 - 2
5 - 3
P r e s s u r e S w i t c h e s . . . . . . . . . . . . . . . . . . . . . . . . . . .
S e r v i c e ( C h a r g i n g ) V a l v e s . . . . . . . . . . . . . . . . . . .P r e s s u r e R e l i e f V a l v e . . . . . . . . . . . . . . . . . . . . . . . . . .
C o n d e n s e r C o i l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .D e h y d r a t o r ( F i l t e r / D r i e r ) . . . . . . . . . . . . . . . . . . . . . . . .L i q u i d I n d i c a t o r . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .R e f r i g e r a n t F l o w S y s t e m w i t h
D e h y d r a t o r a n d C o m p r e s s o r R e m o v e d . . . . . . . . . . . . . .
L I S T O F T A B L E S
T i t l e
O p e r a t o r P r e v e n t i v e M a i n t e n a n c e
Checks and Services. . . . . . . . . . . . . . . . . . . . .
I n i t i a l O p e r a t o r C o n t r o l S e t t i n g s . . . . . . .
Operator Troubleshooting . . . . . . . . . . . . . . . .
O r g a n i z a t i o n a l P r e v e n t i v e M a i n t e n a n c e
Checks and Services (PMCS) . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .Wire List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .
P r e s s u r e - T e m p e r a t u r e R e l a t i o n s h i p
of Sa tu ra t ed R ef r ige ran t -22 . . . . . . . . . . . . .
Normal Operat ing Pressures . . . . . . . . . . . . . .
P a g e
5 - 6 0
5 - 6 35 - 6 5
5 - 6 7
5 - 7 0
5 - 7 2
5 - 7 4
5 - 7 9
P a g e
2 - 7
2 - 1 3
3 - 2
4 - 2 2
4 - 2 94 - 5 9
5 - 4
5 - 4 1
5 - 4 2
v
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
24/333
TM 5-4120-384-14
F i g u r e 1 - 1 . A i r C o n d i t i o n e r
1-0 C h a n g e 2
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
25/333
T M 5 - 4 1 2 0 - 3 8 4 - 1
C H A P T E R 1
INTRODUCTION
S e c t i o n / P a r a g r a p h
General Information . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Main tenance Forms and Records . . . . . . . . . . . . . .
Hand Receipt Manual.. . . . . . . . . . . . . . . . . . . . . .
R e p o r t i n g E q u i p m e n t I m p r o v e m e n t
Recommendations (EIRs) . . . . . . . . . . . . . . . . . . . . .
Equipment Description.. . . . . . . . . . . . . . . . . . . . . . .
E q u i p m e n t C h a r a c t e r i s t i c s , C a p a b i l i t i e s ,
and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
L o c a t i o n a n d D e s c r i p t i o n o f M a j o rComponents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differences Between Models . . . . . . . . . . . . . . . .
Equipment Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T e c h n i c a l P r i n c i p l e s o f O p e r a t i o n . . . . . . . . . . . .
Refrigeration Cycle. . . . . . . . . . . . . . . . . . . . . . . .
H e a t i n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I
1 - 1
1 - 2
1 - 3
1 - 4
I I
1 - 5
1 - 6
1 - 6 . 1
1 - 7
I I I
1 - 8
1 - 9
S e c t i o n I GENERAL INFORMATION
1 -1 . S C O P E .
a . T y p e o f M a n u a l . O p e r a t o r s , O r g a n i z a t i o n a l , D i r e c t S u p p o r t ,
a n d G e n e r a l S u p p o r t M a i n t e n a n c e M a n u a l .
b . M od el N u m be r a n d E q u i p m e n t N a m e . K e c o M o d e l s F 1 8 H - 3 S ,
F 1 8 H - 3 S A, a n d F 1 8 H - 3 S B H o r i z o n t a l , C o m p a c t , 1 8 , 0 0 0 B T U / H R , 2 0 8
V o l t , 3 P h a s e , 5 0 / 6 0 H e r t z , A i r C o n d i t i o n e r s a n d K e c o M o d e l F 1 8 H - 1 S
H o r i z o n t a l , C o m p a c t , 1 8 , 0 0 0 B T U / H R , 2 3 0 V o l t , S i n g l e P h a s e , 6 0
H e r t z , A i r C o n d i t i o n e r .
c . P u r p o s e o f E q u i p m e n t . C o o l s a n d h e a t s e n c l o s e d s p a c e
( s h e l t e r ) . T h e u n i t c o v e r e d b y t h i s m a n u a l i s d e s i g n e d f o r c o o l i n ga n d h e a t i n g a i r t o a d e s i r e d p r e d e t e r m i n e d r a n g e a n d c i r c u l a t i n g
t h e c o n d i t i o n e d a i r t o p r o v i d e h e a t i n g
p e r s o n n e l w i t h i n t h e c o n d i t i o n e d a r e a .
a n d c o o l i n g o f e q u i p m e n t o r
1 - 2 . M A I N T E N A N C E F O R M S A N D R E C O R D S .
D e p a r t m e n t o f t h e A r m y f o r m s a n d p r o c e d u r e s u s e d f o r e q u i p m e n t
m a i n t e n a n c e w i l l b e t h o s e p r e s c r i b e d b y D A P a m p h l e t 7 3 8 - 7 5 0 , T h e
A r m y M a i n t e n a n c e M a n a g e m e n t S y s t e m ( T AM M S ).
C h a n g e 2 1 - 1
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
26/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
1 - 3 . H A N D R E C E I P T M A N U A L .
T h i s m a n u a l h a s a c om p a n i o n d o c u m e n t w i t h a T M n u m b e r f o l l ow e d b y
- H R ( w h i c h s t a n d s f o r H a n d R e c e i p t ) . T h e T M 5 - 4 1 2 0 -3 8 4 - 1 4 -H R
c o n s i s t s o f p r e p r i n t e d h a n d r e c e i p t s ( D A F o r m 2 0 6 2 ) t h a t l i s t e n d
i t e m r e l a t e d e q u i p m e n t ( i . e . , C O E I , B I I , a n d A AL ) yo u m u s t a c co u n tf o r . A s a n a i d t o p r o p e r t y a c c o u n t a b i l i t y , a d d i t i o n a l - H R m a n u a l s
m a y b e r e q u i s i t i o n e d f r o m t h e f o l l o w i n g s o u r c e i n a c c o r d a n c e w i t h
p r o c e d u r e s i n C h a p t e r 3 , A R 3 1 0 - 2 :
T h e U . S . A r m y A d j u t a n t G e n e r a l P u b l i c a t i o n s C e n t e r
2 8 0 0 E a s t e r n B o u l e v a r d
B a l t i m o r e , M D 2 1 2 2 0 .
1 - 4 . R E P O R T I N G E Q U I P M E N T I M P R O V E M E N T R E C O M M E N D A T I O N S ( E I R 8 ) .
I f y o u r A i r C o n d i t i o n e r n e e d s i m p r o v e m e n t , l e t u s k n o w . S e n d u s a nE I R . Y o u , t h e u s e r , a r e t h e o n l y o n e w h o c a n t e l l u s w h a t y o u
d o n t l i k e a b o u t y o u r e q u i p m e n t . L e t u s k n o w w h y y o u d o n t l i k e
t h e d e s i g n o r p e r f o r m a n c e . T e l l u s w h y a p r o ce d u r e i s h a r d t o
p e r f o r m . P u t i t o n a S F 3 6 8 ( Q u a l i t y D e f i c i e n c y R e p o r t ) . M a i l i t
t o u s a t :
C om m a n d e r , U . S . A r m y T r o op S u p p o r t C o m m a n d
A t t e n t i o n : AMSTR-QX
4 3 0 0 G o o d f e l l o w B o u l e v a r d
S t . L o u i s , M i s s o u r i 6 3 1 2 0 - 1 7 9 8 .
W e w i l l s e n d y o u a r e p l y .
S e c t i o n I I EQUIPMENT D ESC R IPTIO N
1 - 5 . E Q UI P M EN T C HAR AC TE R I ST IC S, C AP AB IL IT IE S , AN D F E AT UR E S .
a . T h e a i r c o n d i t i o n e r i s d e s i g n e d t o c i r c u l a t e , f i l t e r , a n d
c o o l o r h e a t a i r i n t h e r o o m o r e n c l o s u r e i n w h i c h i t i s i n s t a l l e d .
b . T h i s a i r c o n d i t i o n e r h a s a c a p a b i l i t y o f p r o v i d i n g a m a x i m u m
o f 1 8 , 0 0 0 B T U / H R o f c oo l i n g o r 1 4 , 3 0 0 B T U / H R o f h e a t i n g . I t i sd e s i g n e d t o a u t o m a t i c a l l y m a i n t a i n t h e a i r i n t h e r o o m o r e n c l o s u r e
a t t h e d e s i r e d t e m p e r a t u r e s e l e c t e d o n t h e c o n t r o l p a n e l .
c . T h e u n i t i s s e l f - c o n t a i n e d i n a s i n g l e c a b i n e t t h a t i s
i d e a l l y s u i t e d f o r v a n o r s h e l t e r t y p e i n s t a l l a t i o n s . T h e o n l y
e x t e r n a l r e q u i r e m e n t s a r e a n e x t e r n a l i n p u t p o w e r s o u r c e , a
1 - 2 C h a n g e 2
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
27/333
T M 5 - 4 1 2 0 - 3 8 4 -
1 -5 . E Q U I P M E N T C H A R A C T E R I S T I C E , C A P A B I L I T I E S , A N D F E A T U R E S ,
- C o n t i n u e d
s u i t a b l e g r o u n d a n d a n e n t r y t o a s u i t a b l e d r a i n . T h e d r a i n m u s t
b e l o w e r t h a n t h e b a s e o f t h e c a b i n e t , i n i t s o p e r a t i n g l o c a t i o n ,
f o r d i s p o s a l o f c o n d e n s a t e w a s t e w a t e r . I t i s d e s i g n e d t o o p e r a t ei n a l m o s t a n y e n v i r o n m e n t a l c o n d i t i o n f r o m a r t i c t o t r o p i c a n d i s
f u l l y p o r t a b l e f o r m o v e m e n t f r o m o n e l o c a t i o n t o a n o t h e r .
d . T h e p r i m a r y i n s t a l l a t i o n r e q u i r e m e n t i s t h a t t h e e x h a u s t a i r
f r o m t h e c o m p r e s s o r / c o n d e n s e r s e c t i o n m u s t b e v e n t e d t o t h e o u t s i d e
a t m o s p h e r e . T h i s s u b j e c t i s f u l l y c o v e r e d i n t h e i n s t a l l a t i o n
i n s t r u c t i o n s c o n t a i n e d i n C h a p t e r 4 , O r g a n i z a t i o n a l M a i n t e n a n c e
I n s t r u c t i o n s .
e . W h e n u s i n g t h e F 1 8 H - 3 S i n a s e c u r e a r e a , c a u t i o n m u s t b e
e x e r c i s e d i n m e e t i n g t h e e s t a b l i s h e d e l e c t r o m a g n e t i c r a d i a t i o n
s t a n d a r d s . T h e s e s t a n d a r d s m a y l i m i t t h e u s e o f t h e e q u i p m e n t s
r e m o t e c a p a b i l i t y a n d r e q u i r e a d d i t i o n a l s h i e l d i n g f o r t h e d u c t s .T h e F 1 8 H - 3 S A a n d F 1 8 H - 3 S B a r e d e s i g n e d f o r i n s t a l l a t i o n o f
E l e c t r o m a g n e t i c P u l s e ( E M P ) K i t ( 9 7 4 0 3 ) 1 3 2 2 8 E 2 0 0 4 .
1 - 6 . L OCAT ION AND DE SCR IP T ION OF MAJ OR COMP O NE NT S.
( S e e f i g . 1 - 2 S h e e t s 1 a n d 2 )
1 F A B R I C C O V E R . P r o t e c t s b a c k o r e x p o s e d s i d e o f t h e u n i t
d u r i n g p e r i o d s o f s h u t d o w n . M u s t b e r o l l e d u p w h e n o p e r a t i n g i n
t h e c o o l m o d e o r w h e n f r e s h ( o u t s i d e ) a i r i s b e i n g u s e d i n a n y
m o d e .
2 C O N D I T I O N E D A I R S U P P L Y L O U V E R . P r o v i d e s d i r e c t i o n a l c o n t r o l
o f c o n d i t i o n e d a i r .
3 C O N D I T I O N E D ( E V A P O R A T O R ) A I R F A N. D r a w s t h e r o om o r
e n c l o s u r e a i r i n t h r o u g h t h e f i l t e r a n d b l o w s i t o u t o v e r t h e
e v a p o r a t o r a n d h e a t e r s t o s u p p l y c o n d i t i o n e d a i r .
4 TEM PER A TU R E SELEC TO R (TH ER M O STA T) SEN SIN G B U LB . S e n s e s t h e
t e m p e r a t u r e o f t h e r o o m o r e n c l o s u r e a i r a s i t i s d r a w n b a c k i n t o
t h e a i r c o n d i t i o n e r . T h i s b u l b i s p a r t o f t h e T E M P E R AT U R E S E L E C T O R
c o n t r o l ( t h e r m o s t a t ) t h a t i s l o c a t e d o n t h e c o n t r o l p a n e l m o d u l e .
5 C O N D I T I O N E D A I R F I L T E R . F i l t e r s r o o m o r e n c l o s u r e a i r a s i t
i s r e c i r c u l a t e d .
6 C O N D I T I O N E D A I R F A N M O T O R . D r i v e s t h e c o n d i t i o n e d a i r f a n s .
7 RETURN AIR LOUVER WITH FILTER CLAMPS. T h e r e c i r c u l a t e d a i r
f r o m t h e r o o m o r e n c l o s u r e i s d r a w n i n t h r o u g h t h i s l o u v e r . T h e
c o n d i t i o n e d a i r f i l t e r , i t e m 5 , i s m o u n t e d o n c l i p s o n t h e i n s i d e
o f t h i s l o u v e r .
C h a n g e 2 1 -
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
28/333
T H 5 - 4 1 2 0 - 3 8 4 - 1 4
F i g u r e 1 - 2 . L o c a t i o n o f M a j o r C o m p o n e n t s ( S h e e t 1 o f 2 )
1 - 4 C h a n g e 1
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
29/333
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
30/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
1 -6 . L O C A T I O N AN D D E S C R I P T I O N O F M AJ O R C O M P O N E N T S . -C o n t i n u e d
J U N C T I O N B O X AN D C O N T R O L P A N E L M O D U L E . C o n t a i n s m a j o r u n i t
c o n t r o l s . S e e i t e m s 9 t h r u 1 6 f o r a d e s c r i p t i o n o f s o m e o f t h e s e
c o n t r o l s .
CONTROL CIRCUIT BREAKER. P r o t e c t s c o n t r o l c i r c u i t .
INPUT POWER RECEPTACLE (PRIMARY LOCATION). C o n n e c t i o n p o i n t
f o r m a i n i n p u t p o w e r c a b l e . S e e i t e m 3 6 f o r a l t e r n a t e r e c e p t a c l e .
CONTROL PANEL MODULE. C o n t a i n s s w i t c h e s a n d c o n t r o l s f o r
o p e r a t i n g t h e a i r c o n d i t i o n e r . S e e i t e m s 1 3 , 1 4 , a n d 1 6 f o r a
d e s c r i p t i o n o f t h e s e s w i t c h e s a n d c o n t r o l s .
H IG H R EFR IG ER A N T PR ESSU R E C U TO U T SW ITC H . T h i s s w i t c h i s
f a c t o r y s e t t o s h u t t h e c o m p r e s s o r o f f i f t h e r e f r i g e r a n t d i s c h a r g e
l i n e p r e s s u r e r i s e s t o 4 3 5 t o 4 5 5 p s i g ( 3 0 . 5 8 t o 3 1 . 9 9 k g / c m2) .
NOTE
T h i s s w i t c h m u s t b e h a n d r e s e t - a f t e r t h e p r e s s u r e
d r o p s t o 3 2 0
COMPR CIRCUIT
c o m p r e s s o r .
MODE SELECTOR
p s i g ( 2 2 . 5 0 k g / c m2) .
B K R ( C o m p r e s s o r C i r c u i t B r e a k e r ) . P r o t e c t s t h e
SWITCH . A l l o w s s e l e c t i o n o f u n i t o p e r a t i n g
m o d e .
LOW REFRIGERANT PRESSURE CUTOUT SWITCH. T h i s s w i t c h i s
f a c t o r y s e t t o s h u t t h e c o m p r e s s o r o f f i f t h e r e f r i g e r a n t s u c t i o nl i n e p r e s s u r e d r o p s t o 1 0 t o 2 0 p s i g ( 0 . 7 0 3 t o 1 . 4 0 6 k g / c m
2) . T h i s
s w i t c h m u s t b e h a n d r e s e t a f t e r t h e p r e s s u r e r i s e s a b o v e 4 0 p s i g
( 2 . 8 1 2 k g \ c m2) .
TE MP ERTURE SE LE CTOR (TH ERMOSTAT) SWITCH . T h i s s w i t c h a l l o w s
s e l e c t i o n o f t h e d e s i r e d t e m p e r a t u r e w h i l e o p e r a t i n g i n t h e c o o l o r
h e a t m o d e s .
GROUND CONNECTION POINT. S h e l t e r o r v a n e l e c t r i c a l g r o u n d
c o n n e c t i o n p o i n t .
CONDENSER DISCHARGE AIR LOUVER ASSEMBLY. T h i s l o u v e r
a s s e m b l y i s a u t o m a t i c a l l y c o n t r o l l e d b y t h e a c t u a t i n g c y l i n d e r ,
i t e m 3 8 .
CONDENSER AIR INLET GUARD. T h i s e x p a n d e d m e t a l s c r e e n
p r o t e c t s t h e c o n d e n s e r f r o m d a m a g e .
F R E S H A I R V E N T I L A T I O N G U A R D . S c r e e n s a n d f i l t e r s f r e s h a i r
e n t e r i n g t h e u n i t .
1 - 6
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
31/333
T M 5 - 4 1 2 0 - 3 8 4 -
1 - 6 . LOCATION AND DESCRIP TION OF MAJ OR COMPONENTS. - C o n t i n u e d
NOTE
T h e a i r c o n d i t i o n e r c a n b e e q u i p p e d f o r o p e r a t i o n i n
c h e m i c a l - b i o l o g i c a l - r a d i o l o g i c a l ( C B R ) e n v i r o n m e n t b yc o n n e c t i n g f i l t e r i n g e q u i p m e n t t o t h e f r e s h a i r
f i l t e r .
RE LIE F VALVE . T h i s s a f e t y v a l v e o p e n s w h e n t h e r e f r i g e r a n t
d i s c h a r g e l i n e p r e s s u r e r i s e s a b o v e 5 4 0 p s i g ( 3 7 . 9 7 k g / c m2) .
C H A R GI N G V AL V E , R E F R I G E R AN T S U C T I O N L I N E . P r o v id e s a
c o n n e c t i o n p o i n t f o r c h a r g i n g a n d c h e c k i n g s u c t i o n l i n e p r e s s u r e .
CHARGING VALVE, REFRIGERANT DISCHARGE LINE. P r o v i d e s a
c o n n e c t i o n p o i n t f o r c h a r g i n g a n d c h e c k i n g d i s c h a r g e l i n e p r e s s u r e .
S O L E N O I D V A L V E , P R E S S U R E E Q U A L I Z I N G . T h i s v a l v e i s n o r m a l l yo p e n w h e n t h e c o m p r e s s o r i s N O T r u n n i n g t o e q u a l i z e t h e p r e s s u r e a t
t h e s u c t i o n a n d d i s c h a r g e s i d e s o f t h e c o m p r e s s o r . I t c l o s e s w h e n
t h e c o m p r e s s o r s t a r t s .
CONDENSER FAN AND MOTOR. T h i s f a n a n d m o t o r d r a w s o u t s i d e
a i r o v e r t h e c o n d e n s e r c o i l t o r e m o v e h e a t f r o m t h e r e f r i g e r a n t
p a s s i n g t h r o u g h t h e t u b e s o f t h e c o n d e n s e r c o i l .
C O M P R E S S O R . C o n s i s t s o f a r e c i p r o c a t i n g c o m p r e s s o r d r i v e n b y
a n e l e c t r i c a l m o t o r , h e r m e t i c a l l y s e a l e d i n s i d e a s t e e l c o n t a i n e r
w i t h a l i f e t i m e c h a r g e o f o i l . A n e x t e r n a l ( c r a n k c a s e ) h e a t e r i s
a t t a c h e d t o t h e l o w e r p a r t o f t h e c o n t a i n e r . T h e p u r p o s e o f t h e
h e a t e r i s t o p r e v e n t p o s s i b l e d a m a g e t o t h e c o m p r e s s o r c a u s e d b yl i q u i d r e f r i g e r a n t a c c u m u l a t i o n i n t h e c y l i n d e r s d u r i n g a p e r i o d o f
s h u t d o w n . T h e h e a t e r i s c o n n e c t e d d i r e c t l y t o i n p u t p o w e r a n d i s
t h e r m o s t a t i c a l l y c o n t r o l l e d t o p r e v e n t o v e r h e a t i n g .
C O N D E N S E R C O I L . M a d e u p o f i n t e r c o n n e c t e d p a r a l l e l c o p p e r
t u b e s r e t a i n e d i n a s e r i e s o f m u l t i p l e , c l o s e l y s p a c e d a l u m i n u m
f i n s . T h i s c o i l s e r v e s a s a h e a t e x c h a n g e r t o r e m o v e t h e h e a t f r o m
t h e c o m p r e s s e d r e f r i g e r a n t v a p o r s o t h a t i t w i l l c o n d e n s e i n t o a
l i q u i d .
DEHYDRATOR, DESICCANT, REFRIGERANT (FILTER/DRIER). Removes
m o i s t u r e a n d c o n t a m i n a n t s f r o m t h e r e f r i g e r a n t .
R E C E I V E R . T h e r e c e i v e r a c t s a s a s t o r a g e t a n k f o r t h e l i q u i d
r e f r i g e r a n t .
SO LEN O ID V A LV E, LIQ U ID LIN E. T h i s v a l v e i s n o r m a l l y o p e n
w h e n t h e c o m p r e s s o r i s N O T r u n n i n g a n d i s t h e r m o s t a t i c a l l y
c o n t r o l l e d d u r i n g c o o l i n g c y c l e s w h e n o p e r a t i n g i n t h e C O O L m o d e .
1
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
32/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
1 -6 . L O C AT I O N AN D D E S C R I P T I O N O F M A J O R C O M P O N E N T S . -C o n t i n u e d
P R E S S U R E R E G U L A T I N G V A L V E S . T h e s e v a l v e s r e g u l a t e s t h e
s u c t i o n p r e s s u r e b y r e c i r c u l a t i n g a p a r t o f t h e c o m p r e s s o r
d i s c h a r g e h o t g a s t o t h e s u c t i o n l i n e w h e n t h e s u c t i o n p r e s s u r e
d r o p s b e l o w a p r e s e t v a l u e . T h i s a c t i o n p r e v e n t s f r o s t i n g o f t h ee v a p o r a t o r c o i l .
E X P A N S I O N V AL V E . M e t e r s r e f r i g e r a n t f l o w t o t h e e v a p o r a t o r
d u r i n g c o o l i n g c y c l e s w h e n o p e r a t i n g i n t h e C O O L m o d e .
E VAP ORATOR COIL. S i m i l a r i n c o n s t r u c t i o n t o t h e m u l t i p l e -
t u b e , f i n n e d c o n d e n s e r c o i l . T h i s c o i l s e r v e s a s a h e a t e x c h a n g e r
f o r t h e r e f r i g e r a n t t o a b s o r b h e a t f r o m t h e r o o m o r e n c l o s u r e a i r
c i r c u l a t e d t h r o u g h t h e e v a p o r a t o r s e c t i o n .
H E A T I N G E L E M E N T S . C o n s i s t s o f t w o b a n k s o f h e a t i n g e l e m e n t s .
O n l y o n e b a n k o p e r a t e s i n t h e L O W H E A T m o d e . B o t h b a n k s o p e r a t e
i n t h e H IG H H E AT m od e . O n e b a n k s h u t s o f f w h e n t h e t h e r m o s t a t i ss a t i s f i e d i n b o t h H I G H a n d L O W H E A T m o d e s .
M I S T E L I M I N A T O R . T h e p u r p o s e o f t h e m i s t e l i m i n a t o r i s t o
t r a p d r o p l e t s o f c o n d e n s e d w a t e r f r o m t h e e v a p o r a t o r s o t h a t t h e y
w i l l n o t b e b l o w n i n t o t h e a i r c o n d i t i o n e d s p a c e .
I N P U T P O W E R R E C E P T A C L E (A L T E R N A T E L O C AT I O N ) . T h e m a i n p o w e r
c a b l e m a y b e c o n n e c t e d h e r e . S e e i t e m 1 0 f o r p r i m a r y l o c a t i o n .
S e e i n s t a l l a t i o n i n s t r u c t i o n s f o r s w i t c h o v e r i n s t r u c t i o n s i f t h i s
p o w e r r e c e p t a c l e i s u s e d .
RE F RIGE RAN T SIGH T GLASS. V i s u a l l y i n d i c a t e s t h e c o n d i t i o n o f
t h e r e f r i g e r a n t f l o w i n g i n t h e r e f r i g e r a n t l i n e s d u r i n g c o o l i n gc y c l e s w h e n o p e r a t i n g i n t h e C O O L m o d e .
A C T U A T I N G C YL I N D E R . T h i s h y d r a u l i c c y l i n d e r o p e r a t e s
d i s c h a r g e l o u v e r a s s e m b l y . I t w i l l s t a r t t o o p e n 2 t h e l o u v e r
a s s e m b l y a t 1 5 0 t o 1 8 0 p s i g ( 1 0 . 5 5 t o 1 2 . 6 6 k g / cm ) a n d f u l l y o p e n
l o u v e r a s s e m b l y a t 2 2 0 t o 2 6 0 p s i g ( 1 5 . 7 4 t o 1 8 . 2 8 k g / c m2)
c o m p r e s s o r d i s c h a r g e p r e s s u r e t o a l l o w u n i t o p e r a t i o n w h e n o u t s i d e
t e m p e r a t u r e i s l o w .
R E S T R I C T O R . D i v i d e s t h e e x p a n d i n g r e f r i g e r a n t t o t h r e e
c i r c u i t s o f t h e e v a p o r a t o r c o i l .
1 - 8
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
33/333
T M 5 - 4 1 2 0 - 3 8 4 -
1 - 6 . 1 D I F F E R E N C E S B E T W E E N M O D E L S
a . E M P u n i t d i f f e r e n c e s
( 1 ) M o d e l s F 1 8 H - 3 S a n d F 1 8 H - 1 S a r e n o t e q u i p p e d t o a c c e p tt h e E l e c t r o m a g n e t i c P u l s e ( E M P ) K i t p a r t n u m b e r ( 9 7 4 0 3 ) 1 3 2 2 8 E 2 0 0 4
( 2 ) M o d e l s F 1 8 H - 3 S A a n d F 1 8 H - 3 S B a r e e q u i p p e d t o a c c e p t E M P
K i t p a r t n u m b e r ( 9 7 4 0 3 ) 1 3 2 2 8 E 2 0 0 4 .
( 3 ) S e e f i g . 1 - 1 f o r e x t e r n a l a p p e a r a n c e d i f f e r e n c e s b e t w e e n
t h e s e u n i t s .
E x t e r n a l i l l u s t r a t i o n s t h r o u g h o u t t h e
r e m a i n d e r o f t h i s m a n u a l r e f l e c t t h e F 1 8 H - 3 S
e x c e p t w h e r e o t h e r w i s e n o t e d .
( 4 ) M od e l s F 1 8 H - 3 S A a n d F 1 8 H - 3 S B m a y b e e q u i p p e d w i t h E M P
K i t p a r t s . S e e f i g . 1 - 2 . 1 f o r i d e n t i f i c a t i o n o f E M P K i t p a r t s t o
d e t e r m i n e i f t h e a i r c o n d i t i o n e r h a s b e e n m o d i f i e d t o i n c l u d e t h i s
k i t .
b .
p h a s e ,
c .
p o w e r .
d .
a c c e s s
M o d e l s F 1 8 H - 3 S , F 1 8 H - 3 S A a n d F 1 8 H - 3 S B u n i t s a r e 2 0 8 v o l t , 3
5 0 / 6 0 h e r t z p o w e r e d u n i t s .
T h e M o d e l F 1 8 H - l S u n i t u s e s 2 3 0 v o l t , s i n g l e p h a s e , 6 0 h e r t z
T h i s r e q u i r e s t h e a d d i t i o n o f c a p a c i t o r s .
M o d e l s F 1 8 H - 3 S a n d F 1 8 H - 1 S a r e e q u i p p e d w i t h a s e r v i c e v a l v e
c o v e r .
C h a n g e 2 1 - 8 . 1
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
34/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
F i g u r e 1 - 2 . 1 E l e c t r o m a g n e t i c P u l s e ( E M P ) K i t P a r t s
1 - 8 . 2 C h a n g e 1
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
35/333
T M 5 - 4 1 2 0 - 3 8 4 -
1 - 7 . E Q U I P M E N T D A T A .
AMBIENT OP ERATING
TEMPERATURE RANGE
LOW
HIGH
PERFORMANCE
COOLING CAPACITY
HEATING CAPACITY
P OWER REQUIRE D
VOLTAGE
PHASE
HERTZ
AMPERAGE
DIMEIOSIONS
WIDTH
DEPTH
HEIGHT
WEIGHT
REFRI G ERA N T
TYPE
CHARGE
- 5 0 F ( - 4 5 C )+ 1 2 5 F ( + 5 2 C )
1 8 , 0 0 0 B T U / H R
1 4 , 3 0 0 B T U / H R
M o d e l s
F 1 8 H - 3 S , F 1 8 H -3 S A
a n d F 1 8 H -3 S B
2 0 8
3
5 0 / 6 0
16
M o d e l s
F 1 8 H - 3 S , F 1 8 H - 3 S A
a n d F 1 8 H -3 S B
3 0 . 0 i n c h ( 7 6 . 2 c m )
2 8 . 0 i n c h ( 7 1 . 1 2 c m )
2 0 . 0 i n c h ( 5 0 . 8 c m )
2 6 5 p o u n d s ( 1 2 0 . 2 k g )
M o d e l
F 1 8 H - l S
2 3 0
S i n g l e
60
2 5
M o d e l
F 1 8 H - 1 S
3 0 . 0 i n c h
2 8 . 0 i n c h
2 0 . 0 i n c h
2 7 5 p ou n d s
( 7 6
( 7 1
( 5 0( 1
. 2 c m )
. 1 2 c m )
. 8 c m )2 4 . 7 k g
R - 2 2
3 . 6 p o u n d s ( 1 . 6 3 k g ) C a r r i e r C o m p r e s s o r
2 . 8 p o u n d s ( 1 . 2 7 k g ) K e c o C om p r e s s o r
S e c t i o n I I I TE CH NICAL P RINCIP LE S OF O P E R A T I O N
1 -8 . R E F R I G E R A T I O N C YC L E .
a . C o o l i n g C y c l e . ( S e e f i g . 1 - 3 . )
T h e C O M P R E S S O R ( 1 ) t a k e s c o l d , l o w p r e s s u r e r e f r i g e r a n t
g a s a n d c o m p r e s s e s i t t o a h i g h t e m p e r a t u r e , h i g h
p r e s s u r e g a s . T h i s g a s f l o w s t h r o u g h t h e m e t a l t u b i n g t o
t h e S P L I T C O N D E N S E R C O I L (3 A) a n d ( 3 B ) a n d R E C E I V E R (4 ) .
C h a n g e 2 1 -
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
36/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
F i g u r e 1 - 3 . R e f r i g e r a t i o n S c h e m a t i c
1 - 1 0
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
37/333
T M 5 - 4 1 2 0 - 3 8 4 -
1 -8 . R E F R I G E R A T I O N C YC L E . -C o n t i n u e d
T h e c o n d e n s e r f a n d r a w s o u t s i d e a m b i e n t a i r o v e r a n d
t h r o u g h t h e t w o s e ct i o n C O N D E N S E R C O I L ( 3 A) a n d ( 3 B ) .
T h e h i g h t e m p e r a t u r e h i g h p r e s s u r e g a s f r o m t h e
C O M P R E S S O R ( 1 ) i s c o ol e d b y t h e f l o w o f a i r a n d i s
c h a n g e d i n t o a h i g h p r e s s u r e l i q u i d .
T h e L I Q U I D S I G H T G L A S S ( 5 ) i n d i c a t e s t h e p r e s e n c e of
m o i s t u r e a n d q u a n t i t y o f r e f r i g e r a n t i n t h e s y s t e m .
T h e D E H Y D R AT O R , D E S I C C A N T , R E F R I G E R A N T ( f i l t e r / d r i e r ) ( 6 )
r e m o v e s a n y m o i s t u r e ( w a t e r v a p o r ) o r d i r t t h a t m a y b e
c a r r i e d b y t h e l i q u i d r e f r i g e r a n t .
T h e S O L E N O I D V AL V E ( 7 ) i s c on t r o l l e d b y t h e T E M P E R A T U R E
S E L E C T O R o n t h e c on t r o l p a n e l . T h i s v a l v e w i l l s h u t o f f
t h e f l o w o f r e f r i g e r a n t t o t h e e v a p o r a t o r s e c t i o n w h e n
t h e t e m p e r a t u r e i n t h e c o n d i t i o n e d a r e a r e a c h e s t h e s e tp o i n t .
T h e E X P A N S I O N V A L V E ( 8 ) co n t r o l s t h e a m o u n t a n d p r e s s u r e
o f l i q u i d r e f r i g e r a n t t o t h e E V AP O R A T O R C O I L ( 1 0 ) . T h e
E X P A N S I O N V A L V E ( 8 ) s e n s e s t h e t e m p e r a t u r e a n d p r e s s u r e
o f t h e r e f r i g e r a n t a s i t l e a v e s t h e e v a p o r a t o r c o i l . B y
u s e o f t h e s e n s i n g b u l b i n t h e B U L B W E L L ( 1 1 ) a n d a n
e x t e r n a l e q u a l i z e r l i n e t h e v a l v e c o n s t a n t l y a d j u s t s
t h e f l o w of l i q u i d r e f r i g e r a n t t o t h e E V AP O R A T O R C O I L
( l o ) .
A s t h e l i q u i d r e f r i g e r a n t l e a v e s t h e E X P A N S I O N V A L VE ( 8 )
i t p a s s e s t h r o u g h t h e R E S T R I C T O R ( 9 ) w h i c h d i v i d e s t h er e f r i g e r a n t f o r t h e t h r e e s e p a r a t e c i r c u i t s o f t h e
E V A P O R A T O R C O I L ( 1 0 ) . A s t h e h i g h p r e s s u r e l i q u i d e n t e r s
t h e c o i l t h e l a r g e r s i z e t u b i n g c a u s e s a s u d d e n r e d u c t i o n
i n p r e s s u r e . T h i s r e d u c t i o n i n p r e s s u r e a n d t h e w a r m e r
a i r b e i n g f o r c e d a c r o s s t h e t u b e s o f t h e c o i l c a u s e t h e
r e f r i g e r a n t t o b o i l o r f l a s h t o a g a s . T h e e v a p o r a t o r
b l o w e r c i r c u l a t e s t h e w a r m a i r f r o m t h e c o n d i t i o n e d s p a c e
o v e r a n d t h r o u g h t h e e v a p o r a t o r c o i l . L i q u i d a b s o r b s
h e a t w h e n i t c h a n g e s f r o m a l i q u i d t o a g a s . A s a i r f r o m
t h e c o n d i t i o n e d s p a c e s c o m e s i n c o n t a c t w i t h t h e
E V A P O R A T O R C O I L ( 1 0 ) , t h e a i r i s c o o l e d .
T o p r e v e n t c o m p r e s s o r o v e r l o a d a n d d a m a g e d u r i n g s t a r t -u p , S O L E N O I D V AL V E ( 1 8 ) i s o p e n a t s t a r t o f c oo l i n g c y c l e
t o e q u a l i z e p r e s s u r e o n b o t h s i d e s o f t h e c o m p r e s s o r .
1 -
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
38/333
T M 5 - 4 1 2 0 - 3 8 4 1 4
1 -8 . R E F R I G E R A T I O N C YC L E . -C o n t i n u e d
b. B y p a s s S y s t e m . T h i s u n i t h a s a b y p a s s s y s t e m w h i c h a l l o w s
c o o l i n g o p e r a t i o n a t l o w c o o l i n g l o a d s w i t h o u t c y c l i n g t h e
c o m p r e s s o r o n a n d o f f . I n b y p a s s t h e r e f r i g e r a n t i s p i p e d f r o m t h e
d i s c h a r g e t o t h e s u c t i o n s i d e o f t h e c o m p r e s s o r , b y p a s s i n g t h e
E V A P O R A T O R C O I L ( 1 0 ) .
W h e n t h e T E M P E R A T U R E S E L E C T O R o n t h e c o n t r o l m o d u l e
s e n s e s t h a t c o o l i n g c o n d i t i o n s h a v e r e a c h e d t h e s e t
p o i n t , i t c l o s e s t h e S O L E N O I D V A L V E ( 7 ) t o s h u t o f f
r e f r i g e r a n t f l ow t o t h e E V A P O R A T O R C O I L ( 1 0 ) .
A s t h e c o m p r e s s o r s u c t i o n p r e s s u r e s t a r t s t o d r o p , t h e
P R E S S U R E R E G U L A T O R S (1 9 ) op e n t o a l l ow f lo w of h o t g a s
f r o m t h e c o m p r e s s o r .
T h e Q U E N C H V A L V E ( 1 7 ) s e n s e s t h e t e m p e r a t u r e o f t h e g a s
a t t h e s u c t i o n s i d e o f t h e c o m p r e s s o r . T o p r e v e n t
e x c e s s i v e l y h o t g a s f r o m r e a c h i n g t h e c o m p r e s s o r t h e
Q U E N C H V AL V E ( 1 7 ) o p e n s t o a l l ow l i q u i d r e f r i g e r a n t t o
m i x w i t h t h e h o t g a s .
T h e L I N E A R A C T U A T I N G C Y L I N D E R A S S E M B L Y ( 1 5 ) a u t o m a t i c a l l y
c o n t r o l s t h e c o n d e n s e r d i s c h a r g e l o u v e r a s s e m b l y .
T h e S E R V I C E V A L VE S ( 1 3 ) a r e p r o v i d e d f o r c h a r g i n g , a n d
g e n e r a l s e r v i c i n g o f t h e h i g h a n d l o w p r e s s u r e s i d e s o f
t h e r e f r i g e r a n t s y s t e m .
T h e L O W P R E S S U R E S W I T C H ( 2 0 ) , t h e H I G H P R E S S U R E S W I T C H
( 1 6 ) a n d t h e P R E S S U R E R E L I E F V AL V E ( 1 4 ) a r e p r o v i d e d t o
p r o t e c t t h e u n i t f r o m d a m a g e d u e t o p r e s s u r e e x t r e m e s .
T h e f l e x i b l e M E T A L H O S E A S S E M B L I E S ( 2 ) a n d ( 1 2 ) p r o v i d e
v i b r a t i o n i s o l a t i o n b e t w e e n t h e c o m p r e s s o r a n d o t h e r
c o m p o n e n t s o f t h e r e f r i g e r a t i o n s y s t e m .
1 - 9 . H E A T I N G
W h e n t h e M O D E S E L E C T O R i s s e t fo r H I G H h e a t , a l l s i x h e a t i n g
e l e m e n t s , l o c a t e d b e h i n d t h e e v a p o r a t o r c o i l a r e e n e r g i z e d . T h e s e
e l e m e n t s a r e p r o t e c t e d f r o m o v e r h e a t i n g b y a t h e r m a l c u t o u t s w i t c h .
H a l f o f t h e e l e m e n t s a r e t h e r m o s t a t i c a l l y c o n t r o l l e d b y t h eTEMPERATURE SELECTOR. T h e r e m a i n i n g h a l f a r e o n a l l o f t h e t i m e .
W h e n s e t f o r L O W , o n l y t h e t h e r m o s t a t i c a l l y c o n t r o l l e d e l e m e n t s a r e
e n e r g i z e d .
1 - 1 2
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
39/333
T M 5 - 4 1 2 0 - 3 8 4 -
C H AP TER 2
OPERATING INSTRUCTIONS
D e s c r i p t i o n a n d U s e o f O p e r a t o r s C o n t r o l s
a n d I n d i c a t o r s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G e n e r a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operators Controls . . . . . . . . . . . . . . . . . . . . . . . .
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P r e v e n t a t i v e M a i n t e n a n c e C h e c k s a n d S e r v i ce s
(PMCS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G e n e r a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
O p e r a t i o n U n d e r U s u a l C o n d i t i o n s . . . . . . . . . . . . .
A s s e m b l y a n d P r e p a r a t i o n f o r U s e . . . . . . . . . . .
O p e r a t i o n a l C h e c k s . . . . . . . . . . . . . . . . . . . . . . .Genera l Operat ing Procedures . . . . . . . . . . . . . . .
Information plates . . . . . . . . . . . . . . . . . . . . . . . . .Preparation for Movement . . . . . . . . . . . . . . . . . . .
O p e r a t i o n U n d e r U n u s u a l C o n d i t i o n s . . . . . . . . . . .
G e n e r a l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation in Extreme Heat . . . . . . . . . . . . . . . . . .
Operation in Extreme Cold . . . . . . . . . . . . . . . . . .
O p e r a t i on i n D u s t y o r S a n d y C on d i t i o n s . . . . .
O p e r a t i on i n U n u s u a l l y We t C o n d i t i o n s . . . . . .
O p e r a t i o n i n S a l t A i r o r S e a S p r a y . . . . . . . . .
O p e r a t i o n U n d e r E m e r g e n c y C o n d i t i o n s . . . . . . .
2 - 7
S e c t i o n I DESCRIPTION AND USE OF
S e c t i o n / P a r a g r a p h
I
2 - 1
2 - 2
2 - 3
I I
2 - 4
I I I
2 - 5
2 - 6
2 - 8
2 - 9I V
2 - 1 0
2 - 1 1
2 - 1 2
2 - 1 3
2 - 1 4
2 - 1 5
2 - 1 6
OP ER ATORS
2 - 1 . G E N E R A L .
CONTROLS AND INDICATORS
T h e a i r c o n d i t i o n e r i s d e s i g n e d f o r a w i d e v a r i e t y o f i n s t a l l a t i o n s
a n d f o r c p e r a t i o n u n d e r a w i d e r a n g e o f c l i m a t i c c o n d i t i on s . I t i s
a l s o d e s i g n e d f o r c o n t i n u o u s o r i n t e r m i t t e n t o p e r a t i o n a s a s e l f -
c on t a i n e d u n i t o r m a y b e c o n n e c t e d t o e x t e r n a l f i l t e r i n g e q u i p m e n t
f o r o p e r a t i o n u n d e r c h e m i c a l - b i o l o g i c a l - r a d i o l o g i c a l ( C B R )
e n v i r o n m e n t a l c o n d i t i o n s . O p e r a t o r s m u s t b e a w a r e o f a n y
p e c u l i a r i t i e s o r o p e r a t i o n a l l i m i t a t i o n s f o r t h e i r s p e c i f i c
i n s t a l l a t i o n .
C h a n g e 1 2 - 1
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
40/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
2 2 . OP ER ATORS CONTROL S.
A l l n e c e s s a r y o p e r a t o r c o n t r o l s a r e i l l u s t r a t e d i n F i g u r e s 2 - 1 a n d
2 - 2 . U s a g e o f c o n t r o l s i s d e t a i l e d i n O p e r a t i o n a l C h e c k s ( p a r a
2 - 6 ) .
U n d e r n o r m a l o p e r a t i n g c o n d i t i o n a l b e f o r e s t a r t i n g
t h e a i r c o n d i t i o n e r i n a n y m o d e l m a k e s u r e t h a t t h e
f a b r i c c o v e r o n t h e b a c k o f t h e c a b i n e t i s r o l l e d u p
a n d s e c u r e d , t h a t t h e c o n d e n s e r f a n i n t a k e s c r e e n a n d
f a n g u a r d a r e i n p l a c e a n d u n o b s t r u c t e d , a n d t h a t t h e
e v a p o r a t o r f a n i n t a k e a n d d i s c h a r g e g r i l l e l o u v e r s
a r e f u l l y o p e n . E XCE P TION S: U n d e r e x t r e m e c l i m a t i c
c o n d i t i o n s s u c h a s b l o w i n g s n o w , w h i c h m i g h t e n t e r
t h e c o m p r e s s o r s e c t i o n , t h e u n i t m a y b e o p e r a t e d i n
t h e V E N T I L A T E , L O H E A T o r H I H E A T m o d e w i t h t h e
f a b r i c c o v e r r o l l e d d o w n a n d s n a p p e d i n p l a c e . When
o p e r a t e d i n t h i s m a n n e , l o u t s i d e a i r c a n n o t b e d r a w n
t h r o u g h ) t h e f r e s h a i r d a m p e r , w h i c h s h o u l d b e
p o s i t i o n e d f u l l y c l o s e d . T h e f a b r i c c o v e r c a n n o t b e
r o l l e d d o w n i f t h e u n i t i s c o n n e c t e d t o a C B R f i l t e r .
DO NOT OPERATE IN THE COOL MODE WITH THE FABRIC COVER
ROLLED DOWN. DAMAGE TO THE EQUIPMENT MAY RESULT IF
PERSONNEL FAIL TO OBSERVE PRECAUTIONS.
2-2 C hange 1
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
41/333
T M 5 - 4 1 2 0 - 3 8 4 - 1
F i g u r e 2 - 1 . O p e r a t o r s C o n t r o l s a n d I n d i c a t o r s
2 -
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
42/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
F i g u r e 2 - 2 . O p e r a t o r s C o n t r o l s a n d I n d i c a t o r s
2 - 4 C h a n g e 1
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
43/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
2 - 3 . I N D I C A T O R S .
( S e e f i g . 2 - 2 . )
T h e r e f r i g e r a n t s i g h t g l a s s i s t h e o n l y v i s u a l i n d i c a t o r
i n c o r p o r a t e d i n t h e a i r c o n d i t i o n e r . T h e r e f r i g e r a n t s i g h t g l a s sh a s a s m a l l ch a m b e r w i t h a g l a s s w i n d o w t h r o u g h w h i c h t h e
r e f r i g e r a n t c o n d i t i o n c a n b e o b s e r v e d . I t i s i n s t a l l e d i n t h e
l i q u i d r e f r i g e r a n t l i n e d o w n s t r e a m f r o m t h e c o n d e n s e r c o i l . L i q u i d
r e f r i g e r a n t a c t u a l l y f l o w s t h r o u g h t h e s i g h t g l a s s c h a m b e r o n l y
d u r i n g c o o l i n g c y c l e s w h e n t h e a i r c o n d i t i o n e r i s i n o p e r a t i o n i n
t h e C O O L m o d e . T h e u n i t m u s t b e o p e r a t e d a p p r o x i m a t e l y 1 5 m i n u t e s
a t m a x i m u m c o o l i n g p r i o r t o c h e c k i n g c o n d i t i o n o f r e f r i g e r a n t a t
s i g h t g l a s s . T h e s i g h t g l a s s i s e q u i p p e d w i t h a c e n t e r i n d i c a t o r
that is moisture sensitive. Dry refrigerant is indicated by the color green, which changes
to chartreuse when the moisture content becomes undesirable, and to yellow when the
level becomes unacceptable . Excessive moisture in the refrigerant may damage or possibly
destroy the compressor. If the liquid refrigerant observed in the sight glass has a milky
appearance, or if frequent bubbles appear, the volume of refrigerant is low and the systemshould be charged. Moisture or low charge indications should be reported to direct support
maintenance for appropriate refrigeration system action.
D o n o t o p e r a t e t h e a i r c o n d i t i on e r i n t h e C O O L m o d e
i f t h e r e f r i g e r a n t c o l o r h a s r e a c h e d t h e y e l l o w b a n d
o r i f n u m e r o u s b u b b l e s a p p e a r i n t h e s i g h t g l a s s .
C O O L m o d e o p e r a t i o n m a y b e c o n t i n u e d w i t h t h e
r e f r i g e r a n t c o l o r i n t h e c h a r t r e u s e b a n d o r w i t h o n l y
a n o c ca s i o n a l b u b b l e a p p e a r i n g i n t h e w i n d o w , b u t t h es i g h t g l a s s s h o u l d b e r e c h e c k e d a f t e r e a c h f o u r h o u r s
of operation to insure that the condit ion has not become worse. Damage to
the equipment may result if Personnel fail to observe precautions.
C h a n g e 1 2 - 5
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
44/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
S e c t i o n I I PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
2 - 4 . G E N E R A L
P r e v e n t i v e m a i n t e n a n c e c h e c k s a n d s e r v i c e s ( P M C S ) a r e e s s e n t i a l t o
t h e e f f i c i e n t o p e r a t i o n o f t h e a i r c o n d i t i o n e r a n d t o p r e v e n t
p o s s i b l e d a m a g e t h a t m i g h t o c c u r t h r o u g h n e g l e c t o r f a i l u r e t o
o b s e r v e w a r n i n g s y m p t o m s i n a t i m e l y m a n n e r . C h e c k s a n d s e r v i c e s
p e r f o r m e d b y o p e r a t o r s a r e l i m i t e d t o t h o s e f u n c t i o n s w h i c h c a n b e
a c c o m p l i s h e d f r o m t h e o u t s i d e o f t h e c a b i n e t .
a . B e f o r e Y o u O p e r a t e . A l w a y s k e e p i n m i n d a n d o b s e r v e t h e
W AR N I N G S a n d C A U T I O N S c on t a i n e d i n t h i s t e c h n i ca l m a n u a l a n d p l a t e s
i n s t a l l e d o n t h e e q u i p m e n t t h a t a r e a s s o c i a t e d w i t h t h e f u n c t i o n s
y o u a r e a b o u t t o p e r f o r m . P e r f o r m y o u r b e f o r e ( B ) P M C S f r o m T a b l e
2 - 1 .
b . W h i l e Y o u O p e r a t e . A l w a y s k e e p i n m i n d a n d o b s e r v e t h e
W AR N I N G S a n d C A U T I O N S c on t a i n e d i n t h i s t e c h n i ca l m a n u a l a n d p l a t e s
i n s t a l l e d o n t h e e q u i p m e n t t h a t a r e a s s o c i a t e d w i t h o p e r a t i o n a l
f u n c t i o n s . P e r f or m y o u r d u r i n g ( D ) P M C S f r o m T a b l e 2 - 1 .
c . A f t e r Y o u O p e r a t e . B e s u r e t o p e r f o r m y o u r a f t e r ( A ) P M C S
f r o m T a b l e 2 - 1 .
d . I f Y o u r E q u i p m e n t F a i l s t o O p e r a t e . T r o u b l e s h o o t w i t h i n
y o u r c a p a b i l i t i e s a n d w i t h p r o p e r e q u i p m e n t . R e p or t a n y
d e f i c i e n c i e s a s a p p r o p r i a t e u s i n g t h e p r o p e r f o r m a s s p e c i f i e d i n
D A P a m p h l e t 7 3 8 - 7 50 .
NOTE
W i t h i n d e s i g n a t e d i n t e r v a l s , t h e s e c h e c k s a r e
t o b e p e r f o r m e d i n t h e o r d e r l i s t e d .
I f t h e e q u i p m e n t m u s t b e k e p t i n c o n t i n u o u s
o p e r a t i o n c h e c k a n d s e r v i c e o n l y t h o s e i t e m s
t h a t c a n b e c h e c k e d a n d s e r v i c e d w i t h o u td i s t u r b i n g o p e r a t i o n . M a k e t h e c o m p l e t e
c h e c k s a n d s e r v i ce s w h e n t h e e q u i p m e n t c a n b e
s h u t d o w n .
2 - 6
8/14/2019 TM 5-4120-384-14 AIR CONDITIONER MDL F18H-3S USED ON TRAILER (SEE MAP 4120-405) NSN 4120-01-165-1125
45/333
T M 5 - 4 1 2 0 - 3 8 4 - 1 4
I t em
N o .
I n t e r v a l
1
2
3
4
5
T a b l e 2 - 1 . OPERATOR PREVENTIVE MAINTENANCE
CHECKS AND SERVICES
B - B e f o r e A - A f t e r M - M o n t h l y
D - D u r i n g w - W e e k l y
I t e m T o B e
I n s p e c t e d
I n f o r m a t i o n
p l a t e s
F a b r i c C o v e r
P a n e l s
S c r e e n s a n dG u a r d s
L o u v e r s
P r o c e d u r e s
C h e c k f o r a n d h a v e
r e p a i r e d o r a d j u s t e d
a s n e c e s s a r y .
C h e c k f o r l e g i b i l i t y
a n d l o os e o r m i s s i n g
h a r d w a r e .
C h e c k t h a t c o v e r i s
r o l l e d u p f o r n o r m a l
o p e r a t i o n .
R o l l d o w n c o v e r a n d
c h e c k f o r c o n d i t i o n
o f s n a p s , m i l d e w ,
t e a r s o r w o r n e d g e s .
C h e c k f o r c r a c k ,
d e n t s , o r m i s s i n g
h a r d w a r e .
C h e c k f o ro b s t r u c t i o n s , d a m a g e ,
l o o s e o r m i s s i n g
h a r d w a r e .
C h e c k f o r o b s t r u c -
t i o n s , d a m a g e ,
p r o p e r a d j u s t m e n t ,
l o o s e o r m i s s i n g
h a r d w a r e .
C h e c k l o u v e r s f o r
f r e e d o m o f o p e r a -
t i o n s . L u b r i c a t ea s r e q u i r e d .
E q u i p m e n t I s
N o t R e a d y /
A v a i l a b l e I f :
C o v e r i s
m i s s i n g o r
d a m a g e d .
P a n e l s
m i s s i n g o r
d a m a g e d .
S c r e e n s o rg u a r d
d a m a g e d o r
m i s s i n g .
L o u v e r s a r e
d a m a g e d o r
m i s s i n