McQuay MDM Air Handling Unit - : : Acson International : :€¦ · · 2005-01-14The new series AHU adopt modulus design and have more reasonable structure and more flexible combination

CMDM - 2004

McQuayMDM Air Handling Unit

Note: Installation and maintenance are to be performed only by qualified personnel who are familiarwith local codes and regulations, and experienced with this type of equipment.

Caution: Sharp edges and coil surfaces are a potential injury hazard. Avoid contact with them.

ContentsPage

Nomenclature System .............................................................................................. 1

Features..................................................................................................................... 2

Performance Tables.................................................................................................. 4

Outlines and Dimensions........................................................................................ 15

Section Weights ....................................................................................................... 23

Installation................................................................................................................ 25

Operation.................................................................................................................. 27

Maintenance ............................................................................................................. 28

Troubleshooting....................................................................................................... 30

“McQuay” is a registered trademark of McQuay International. All rights reserved throughout the world.

© 2003 McQuay International

“Bulletin illustration cover the general appearance of McQuay International products at the time of publication and wereserve the right to make change in design and construction any time without notice”

Warning: Moving machinery and electrical power hazard. May cause severe personal injury ordeath. Disconnect and lock off power before servicing equipment.

1

Nomenclature System

MDM -08 10 -L -FI -H

Type MDM air handling units:

• Total 123 unit sizes• Air volume: 1200CMH to 100000CMH• Coil face area: 0.226 sq.m to 10.03 sq.m• External static pressure up to 1000 Pa• Internally mounted motor for all units• Forward curved fan wheels are standard for all units• Backward curved and airfoil fan wheels are optional

Unit ArrangementH – Horizontal Arranged UnitV – Vertical Unit

Outlet ModeF – FrontFI – Front InvertedT – TopTI – Top Inverted

Orientation of the PipeConnectionL – Left ConnectionR – Right Connection

Width Modulus of the Unit

Height Modulus of the Unit

McQuay Double-SkinnedModulus Air Handling Unit

2

FeaturesFor years, McQuay international has earned a reputation for providing the industry’s various highest qualityand most technologically advanced air handling systems. Now McQuay is proud to introduce the new MDMseries air-handling unit. Inherited from the advantage of the earlier product experiences and introduced themost up to date technology, the new McQuay air handling units is designed to meet the highest industrystandards. The new series AHU adopt modulus design and have more reasonable structure and moreflexible combination functional modules. It can widely apply to various situation where central air handling isrequired such as emporium, hotel, commercial building and other stringent applications where clean andconditioned air is essential such as surgical operating theatres and semi-conductors fabricating facilities, etc.

High-Strength

The new high-strength frame of each unit is fabricated from heavy gauge aluminium extrusion formed unto arigid construction and incorporating die-cast aluminium corner pieces. Besides the above, the doubleskinned panel has special structure in it to strengthen the panel. The McQuay MDM Air Handling unit isstrong enough to perform at high pressures than typically bow panels on ordinary units.

Low Air Leakage Design Assures High Thermal And Filtration Efficiencies

The McQuay MDM Air Handling Unit has its unique spring steel slice design to incorporate the flame and thepanel. By the unique design the frame and panel can be incorporate more tightly to provide maximumstrength and prevent air leakage. Standard insulation is polyurethane foam frame members are tightly andrigidly fixed together to provide the best insulating feature. The low leakage rates minimize the ingress ofunfiltered air and energy loss – to give you exceptional performance.

Excellent Thermal Barrier

All the frame and channels are insulated with the UPVC insulation gasket to create a thermal barrierbetween the internal and the external panels. This design eliminates cold bridges to provide efficient thermalperformance and prevent the air handling units from sweating during operation.

Improved Indoor Air Quality

Designed to be as easy to maintain, as it is to install, the McQuay MDM Air Handling Unit offers extendedcoil connections and hinged access doors, or lift off panels. Unit sections can be thoroughly cleaned toreduce the potential for indoor air quality problems. In addition, the slopped and painted galvanized steelcooling coil drain pan reduces the risk of algae and fungi build up and prevents corrosion. The glazed innersurface assures that no fibers will be released into the air stream and no internal moisture will penetrate theinsulation to support microbial growth. All these insure the IAQ provided by McQuay MDM.

Internal Motor & Fan Isolation

To insure that noise and vibration are compatible with the intended use of the conditioned air space, goodacoustical and vibration blower and motor engineering practices should be applied during the early stages ofdesign. While most applications require vibration isolation, McQuay MDM Air Handlers are available withfactory installed internal isolation for all unit sizes. Internally isolated units feature internally mounted 1”deflection spring isolators sized specifically for each fan wheel and motor size.

Internal fan and motor mounted on spring isolated galvanized steel base provides low noise operation andminimum vibration transmission. Break out noise is further attenuated by the double-skinned panelconstruction. Since internal isolation minimizes vibration at the source (fan and motor), there is seldom a

3

need for flexible connection on ductwork or coil piping. Internal isolation provides an opportunity forsignificantly reduced installation costs.

McQuay also can provide function such as mixing section, exhaust section, access section, attenuationsection, humidifier section, electric heating section, heating coil section, secondary mixing section,distribution and heat recovery section, etc. All these sections can be neatly combined to gain correspondingfunction.

MD

M S

erie

s U

nit

s A

ir F

low

Tab

le (

I)

HE

IGH

TC

OIL

HE

IGH

TW

IDT

H M

OD

ULU

S4M

5M6M

7M8M

9M10

M11

M12

M13

M14

M15

M

MO

DU

LUS

(mm

)C

OIL

WID

TH

(mm

)42

058

074

090

010

6012

2013

8015

4017

0018

6020

2021

80

3M30

4.8

1152

1591

2030

2469

2908

3347

4M45

7.2

2387

3045

3703

4362

5020

5678

6337

5M60

9.6

4060

4938

5816

6693

7571

8449

6M76

250

7561

7272

6983

6794

6410

561

1165

9

7M91

4.4

7407

8723

1004

011

357

1267

413

990

1530

716

624

1794

1

8M10

66.8

1017

711

713

1325

014

786

1632

217

858

1939

420

931

9M12

19.2

1338

715

142

1689

818

654

2040

922

165

2392

1

10M

658.

2 x

217

035

1901

020

985

2296

124

936

2691

1

11M

762

x 2

2112

323

317

2551

227

706

2990

1

12M

838.

2 x

225

649

2806

330

477

3289

1

13M

914.

4 x

230

614

3324

835

881

14M

990.

6 x

236

018

3887

1

15M

1066

.8 x

241

861

16M

1143

x 2

17M

1219

.2 x

2

18M

1295

.4 x

2

Not

es: 1)

The

air

flow

is o

n th

e co

nditi

on th

at th

e fa

ce v

eloc

ity is

2.5

m/s

2)

1M =

160

mm

3)

The

sta

ndar

d pa

nel t

hick

ness

is 3

3mm

4)

Cas

ing

Wid

th =

Wid

th M

odul

us ×

160

+50

(mm

)5)

H

oriz

onta

l Arr

ange

d C

asin

g H

eigh

t = H

eigh

t Mod

ulus

× 1

60+5

0 (m

m)

6)

Ver

tical

Arr

ange

d C

asin

g H

eigh

t = 2

× (

Hei

ght M

odul

us ×

160

+50

(mm

))7)

U

nit H

eigh

t = C

asin

g H

eigh

t + B

ase

Hei

ght (

refe

r to

the

tabl

e of

Fan

Sec

tion

Dat

a)

4

Performance Tables

MD

M S

erie

s U

nit

s A

ir F

low

Tab

le (

II)

HE

IGH

TC

OIL

HE

IGH

TW

IDT

H M

OD

ULU

S16

M17

M18

M19

M20

M21

M22

M23

M24

M25

M26

M

MO

DU

LUS

(mm

)C

OIL

WID

TH

(mm

)23

4025

0012

95 x

213

75 x

214

55 x

215

35 x

216

15 x

216

95 x

217

75 x

218

55 x

219

35 x

2

3M30

4.8

4M45

7.2

5M60

9.6

6M76

2

7M91

4.4

8M10

66.8

9M12

19.2

2567

627

432

10M

658.

2 x

228

886

3086

1

11M

762

x 2

3209

534

290

12M

838.

2 x

235

305

3771

939

077

13M

914.

4 x

238

515

4114

842

629

14M

990.

6 x

241

724

4457

746

182

4903

551

888

15M

1066

.8 x

244

934

4800

649

734

5280

755

879

16M

1143

x 2

4814

351

435

5328

756

579

5987

063

162

6645

469

746

7303

876

330

7962

1

17M

1219

.2 x

254

864

5683

960

350

6386

267

373

7088

474

396

7790

781

418

8492

9

18M

1295

.4 x

260

392

6412

267

853

7158

475

315

7904

582

776

8650

790

238

Not

es: 1)

The

air

flow

is o

n th

e co

nditi

on th

at th

e fa

ce v

eloc

ity is

2.5

m/s

2)

1M =

160

mm

3)

The

sta

ndar

d pa

nel t

hick

ness

is 3

3mm

4)

Cas

ing

Wid

th =

Wid

th M

odul

us ×

160

+50

(mm

)5)

H

oriz

onta

l Arr

ange

d C

asin

g H

eigh

t = H

eigh

t Mod

ulus

× 1

60+5

0 (m

m)

6)

Ver

tical

Arr

ange

d C

asin

g H

eigh

t = 2

× (

Hei

ght M

odul

us ×

160

+50

(mm

))7)

U

nit H

eigh

t = C

asin

g H

eigh

t + B

ase

Hei

ght(

refe

r to

the

tabl

e of

Fan

Sec

tion

Dat

a)

5

6

The Cooling Performance Data Table Based On Return-Air Mode (I)

COIL TYPE (4 ROWS / 12 FPI)

FACE VELOCITY - 2.5m/s FACE VELOCITY - 2.75m/sA.F W.F W.P.D S.C T.C A.F W.F W.P.D S.C T.C

MODELMDM CIRCUIT

PIPEconnection

BSPm³/h l/s kPa kW kW m³/h l/s kPa kW kW

0306 H 1.5 2030 0.64 7.3 10.33 13.82 2233 0.68 8.1 11.11 14.71

0308 H 1.5 2908 1.00 19.6 15.00 21.25 3199 1.05 21.3 16.36 22.58

0408 H 1.5 4362 1.48 21.4 22.49 31.39 4798 1.58 24.0 24.25 33.53

0410 H 1.5 5678 2.00 41.7 29.84 42.56 6246 2.15 47.4 32.22 45.58

0509 H 1.5 6693 2.35 34.8 34.78 49.28 7362 2.50 38.9 37.49 52.60

0510 H 1.5 7571 2.70 47.2 39.71 56.78 8328 2.90 53.6 42.94 60.96

0511 L 2.0 8449 2.80 17.1 42.57 59.32 9294 3.00 19.3 45.97 63.46

0610 H 1.5 9464 3.35 52.1 49.44 70.68 10410 3.55 57.8 53.29 75.44

0611 L 2.0 10561 3.50 18.8 53.08 74.02 11617 3.80 21.8 57.46 79.51

0612 L 2.0 11659 4.00 25.1 59.34 83.65 12825 4.20 27.4 63.90 89.05

0711 L 2.5 12674 4.20 18.7 63.60 88.73 13941 4.50 21.2 68.70 94.93

0712 L 2.5 13990 4.70 24.1 70.83 99.62 15389 5.10 27.8 76.73 107.12

0713 L 2.5 15307 5.30 31.3 78.43 111.37 16838 5.70 35.6 84.68 119.11

0812 L 2.5 16322 5.50 26.2 82.60 116.25 17954 6.00 30.7 89.55 125.19

0813 L 2.5 17858 6.20 34.0 91.46 129.94 19644 6.70 39.1 98.84 139.19

0913 L 2.5 20409 7.00 36.0 104.25 147.94 22450 7.50 40.8 112.48 158.01

0914 L 2.5 22165 7.80 45.6 114.32 163.46 24382 8.30 51.0 123.52 175.07

1014 L 2.0 24936 8.80 37.7 128.60 183.96 27430 9.40 42.4 139.06 197.28

1015 L 2.0 26911 9.50 45.2 139.48 200.33 29602 10.20 51.2 150.74 214.64

1115 L 2.0 29901 10.70 48.4 155.25 223.31 32891 11.50 55.0 167.81 239.34

1116 S 2.0 32095 11.00 30.7 162.58 230.16 35305 11.70 34.3 175.35 245.61

1216 S 2.5 35305 12.00 28.2 178.52 252.46 38836 13.00 32.6 193.16 270.89

1217 S 2.5 37719 13.00 33.7 192.04 273.01 41491 14.00 38.5 207.47 292.22

1317 S 2.5 41148 14.20 35.7 209.49 297.89 45263 15.00 39.4 225.56 317.01

1417 S 2.5 44577 15.50 38.3 227.19 323.34 49035 16.30 41.9 244.45 343.70

1518 H 2.0 49734 17.20 37.5 253.86 361.84 54707 18.50 42.7 274.48 387.86

1618 H 2.0 53287 18.80 40.1 272.84 389.75 58616 20.00 44.7 294.52 416.65

1719 H 2.0 60350 21.00 46.1 309.61 443.07 66385 22.50 52.2 334.53 474.44

1820 L 2.5 67853 22.00 19.5 333.31 462.84 74638 24.00 22.8 361.35 498.04

1822 L 2.5 75315 25.00 25.6 374.94 526.08 82847 27.00 29.5 405.73 564.40

1825 L 2.5 86507 30.00 37.9 438.78 624.21 95158 32.00 42.7 473.18 665.98

1826 L 2.5 90238 31.00 41.0 458.49 653.15 99262 33.50 47.2 496.06 700.82

Notes:1) Entering Dry Bulb Temperature (EDB): 27°C2) Entering Wet Bulb Temperature: 19.5°C3) Entering Water Temperature: 7°C4) Leaving Water Temperature: 12°C

7

The Cooling Performance Data Table Based On Return-Air Mode (II)



MODELMDM CIRCUIT

PIPEconnection


0306 H 1.5 2030 0.83 16.9 12.03 17.78 2233 0.90 19.5 13.03 19.16

0308 H 1.5 2908 1.20 39.5 17.38 26.20 3199 1.32 46.6 18.89 28.36

0408 H 1.5 4362 1.87 45.4 25.95 39.36 4798 2.00 51.1 28.11 42.37

0410 L 1.5 5678 2.35 31.3 33.01 49.77 6246 2.52 35.5 35.78 53.59

0509 L 2.0 6693 2.80 20.9 38.58 57.96 7362 2.95 22.9 41.71 62.14

0510 L 2.0 7571 3.15 27.5 43.88 66.26 8328 3.40 31.4 47.63 71.47

0511 L 2.0 8449 3.60 37.0 49.39 75.05 9294 3.80 40.6 53.45 80.60

0610 L 2.0 9464 3.90 29.2 54.65 82.53 10410 4.20 33.3 59.30 88.98

0611 L 2.0 10561 4.40 38.3 61.41 93.24 11617 4.80 44.7 66.78 100.83

0612 L 2.0 11659 5.00 50.7 68.38 104.41 12825 5.40 58.1 74.27 112.72

0711 L 2.5 12674 5.30 38.4 73.63 111.88 13941 5.80 45.0 80.12 121.10

0712 L 2.5 13990 5.90 49.0 82.78 124.76 15389 6.40 56.6 88.87 134.81

0713 S 2.5 15307 6.30 32.1 87.83 132.87 16838 6.80 36.8 95.38 143.35

0812 S 2.5 16322 6.60 28.0 92.82 139.70 17954 7.20 32.8 100.95 151.07

0813 S 2.5 17858 7.40 35.8 102.49 155.16 19644 7.90 40.3 111.12 167.00

0913 S 3.0 20409 8.40 32.3 116.94 176.99 22450 9.60 37.3 127.07 191.13

0914 S 3.0 22165 9.20 39.6 127.77 194.13 24382 9.90 45.2 138.72 209.38

1014 S 2.0 24936 10.50 38.5 143.97 219.01 27430 11.20 43.3 156.12 235.77

1015 S 2.0 26911 11.50 47.2 156.35 238.72 29602 12.30 53.3 169.62 257.23

1115 M 2.5 29901 12.00 19.3 166.79 249.27 32891 12.90 22.0 181.03 268.53

1116 M 2.5 32095 13.00 23.0 180.26 270.57 35305 14.00 26.3 195.71 291.68

1216 M 2.5 35305 14.00 23.9 197.58 296.05 38836 15.20 27.8 214.79 319.77

1217 M 2.5 37719 15.30 28.9 212.86 320.56 41491 16.40 32.9 230.96 245.24

1317 M 2.5 41148 16.25 30.6 231.75 348.71 45263 18.00 35.9 252.14 377.13

1417 M 2.5 44577 18.00 33.4 251.30 378.35 49035 19.50 38.7 273.11 408.52

1518 L 2.5 49734 20.50 26.8 281.91 425.83 54707 22.00 30.4 305.95 458.85

1618 L 2.5 53287 22.00 27.8 307.08 456.38 58616 23.60 31.6 327.83 491.72

1719 L 2.5 60350 25.00 33.2 343.66 520.65 66385 27.00 38.1 373.35 561.94

1820 L 2.5 67853 28.00 38.7 387.58 588.24 74638 30.00 43.8 420.59 633.92

1822 L 2.5 75315 32.00 51.6 434.78 663.85 82847 34.00 57.6 471.32 714.33

1825 S 3.0 86507 36.00 34.3 492.30 746.61 95158 38.00 37.8 533.05 801.68

1826 S 3.0 90238 37.00 36.7 513.90 779.77 99262 40.00 42.3 558.40 841.87


8

The Cooling Performance Data Table Based On Return-Air Mode (III)



MODELMDM CIRCUIT

PIPEconnection


0306 H 1.5 2030 0.93 27.1 13.00 20.00 2233 1.00 30.8 14.10 21.61

0308 H 1.5 2908 1.38 66.3 18.72 29.21 3199 1.48 74.8 20.33 31.62

0408 L 1.5 4362 2.00 25.4 27.07 41.90 4798 2.15 29.4 29.41 45.32

0410 L 1.5 5678 2.65 48.4 35.61 55.63 6246 2.85 55.0 38.72 60.25

0509 L 2.0 6693 2.60 23.5 39.98 61.64 7362 2.80 26.7 43.43 66.62

0510 S 2.0 7571 3.40 21.1 46.24 71.62 8328 3.70 24.5 50.33 77.67

0511 S 2.0 8449 3.80 27.2 51.87 80.65 9294 4.20 32.5 56.59 87.75

0610 S 2.0 9464 4.30 24.0 57.76 89.60 10410 4.60 27.1 62.74 96.85

0611 S 2.0 10561 4.80 30.7 64.79 100.88 11617 5.20 35.5 70.52 109.36

0612 S 2.0 11659 5.30 38.5 71.84 112.19 12825 5.80 45.3 78.31 121.88

0711 S 2.5 12674 5.70 29.9 77.55 120.73 13941 6.20 34.7 84.46 130.97

0712 S 2.5 13990 6.50 39.7 86.34 135.03 15389 7.00 45.3 93.94 146.30

0713 S 2.5 15307 7.00 47.4 94.64 148.24 16838 7.60 54.9 103.09 160.87

0812 M 2.5 16322 7.10 20.1 96.88 149.02 17954 7.60 22.8 105.23 160.94

0813 M 2.5 17858 7.80 24.6 106.71 164.78 19644 8.50 28.9 116.23 178.74

0913 M 3.0 20409 9.00 24.2 122.05 188.63 22450 9.80 28.4 132.94 204.59

0914 M 3.0 22165 10.00 30.3 133.67 207.52 24382 10.80 34.9 145.45 224.76

1014 M 2.5 24936 11.20 21.8 150.23 233.18 27430 12.00 24.6 163.28 252.14

1015 M 2.5 26911 12.00 25.5 162.71 253.07 29602 13.00 29.5 177.14 274.33

1115 M 2.5 29901 13.40 27.7 180.85 281.41 32891 14.50 32.0 196.87 304.99

1116 M 2.5 32095 14.50 33.0 195.11 304.39 35305 15.80 38.6 212.62 330.42

1216 M 2.5 35305 16.00 35.6 214.66 334.97 38836 17.50 41.9 234.04 363.84

1217 M 2.5 37719 17.00 40.9 229.98 359.44 41491 18.50 47.7 250.60 390.15

1317 M 2.5 41148 19.00 45.7 251.60 393.75 45263 20.50 52.6 273.89 426.80

1417 M 2.5 44577 20.50 48.5 272.39 426.22 49035 22.00 55.3 296.31 461.53

1518 L 2.5 49734 23.00 41.0 304.90 477.85 54707 25.00 47.5 331.94 518.05

1618 L 2.5 53287 24.50 41.7 326.10 510.78 58616 26.50 48.0 355.14 553.96

1719 L 2.5 60350 27.50 48.4 369.71 579.48 66385 30.00 56.6 403.39 630.20

1820 L 2.5 67853 31.50 58.5 417.96 656.76 74638 34.00 67.1 455.19 712.40

1822 S 3.0 75315 34.00 35.0 457.14 714.25 82847 37.00 40.8 498.15 775.26

1825 S 3.0 86507 40.00 50.2 530.48 832.70 95158 43.00 57.1 577.38 902.44

1826 S 3.0 90238 42.00 55.9 554.89 872.10 99262 45.00 63.3 603.80 944.84


9

The Cooling Performance Data Table Based On Fresh-Air Mode (I)



MODELMDM CIRCUIT

PIPEconnection


0306 H 1.5 2030 1.60 36.6 13.89 33.62 2233 1.68 39.8 14.81 35.80

0308 L 1.5 2908 2.20 31.0 19.28 46.90 3199 2.35 34.8 20.64 50.10

0408 L 1.5 4362 3.30 39.7 28.63 69.98 4798 3.52 44.6 30.66 74.74

0410 S 1.5 5678 4.25 44.7 36.73 89.93 6246 4.60 51.7 39.46 96.34

0509 L 2.0 6693 5.16 45.0 44.48 109.40 7362 5.65 53.4 47.84 117.43

0510 L 2.0 7571 5.95 61.5 50.96 125.65 8328 6.40 70.0 54.69 134.57

0511 S 2.0 8449 6.50 44.0 55.44 136.42 9294 7.00 50.4 59.51 146.09

0610 S 2.0 9464 7.10 39.7 61.00 149.86 10410 7.60 45.0 65.41 160.21

0611 S 2.0 10561 8.10 52.5 69.13 170.29 11617 8.60 58.6 74.03 181.83

0612 M 2.5 11659 8.40 27.9 72.22 176.64 12825 9.00 31.8 77.52 188.87

0711 S 2.5 12574 9.80 52.5 82.98 204.59 13941 10.40 58.5 88.86 218.44

0712 M 2.5 13990 10.00 33.9 86.41 211.44 15389 10.80 39.2 92.93 226.54

0713 M 2.5 15307 11.40 44.4 96.48 236.95 16838 12.00 48.8 102.93 251.67

0812 M 2.5 16322 11.70 41.3 100.79 246.78 17954 12.50 46.8 108.15 263.73

0813 M 2.5 17858 13.00 51.3 111.94 274.87 19644 13.90 58.2 119.84 293.06

0913 M 3.0 20409 15.00 49.9 128.12 314.79 22450 16.00 56.4 137.08 335.79

0914 M 3.0 22165 16.50 60.8 140.92 346.99 24382 17.80 70.3 151.42 371.64

1014 M 2.5 24936 18.60 38.7 158.54 390.47 27430 19.70 43.1 169.73 416.46

1015 M 2.5 26911 20.50 47.6 173.32 427.68 29602 22.00 54.3 186.03 457.64

1115 M 2.5 29901 22.50 51.8 192.07 473.90 32891 24.00 58.4 205.92 506.45

1116 D 2.5 32095 23.10 41.1 198.23 486.53 35305 24.80 47.0 212.75 520.05

1216 D 2.5 35305 25.50 46.8 218.17 535.60 38836 27.20 52.9 233.85 571.63

1217 D 2.5 37719 27.50 54.7 235.63 579.52 41491 29.20 61.3 251.91 616.83

1317 D 2.5 41148 29.90 60.9 256.83 631.66 45263 32.00 69.3 275.01 673.55

1417 D 2.5 44577 32.50 68.3 278.38 684.80 49035 34.50 76.6 297.61 728.85

1518 S 2.5 49734 37.00 38.6 313.26 771.67 54707 39.00 42.5 335.07 822.01

1618 S 3.0 53287 40.00 32.0 336.20 828.44 58616 42.00 35.0 359.34 881.75

1719 S 3.0 60350 45.00 38.6 383.08 944.88 66385 48.00 43.5 449.58 1009.53

1820 S 3.0 67853 52.00 49.2 435.81 1076.83 74638 55.00 54.6 466.60 1148.77

1822 M 3.0 75315 54.00 39.1 465.52 1118.62 82847 58.00 44.0 492.09 1201.39

1825 M 3.0 86507 63.00 53.7 537.52 1322.63 95158 68.00 62.1 576.65 1413.36

1826 D 3.0 90238 62.00 47.0 532.58 1298.97 99262 66.00 53.0 570.96 1385.09

Notes:1) Entering Dry Bulb Temperature (EDB): 34°C2) Entering Wet Bulb Temperature: 28°C3) Entering Water Temperature: 7°C4) Leaving Water Temperature: 12°C

10

The Cooling Performance Data Table Based On Fresh-Air Mode (II)



MODELMDM CIRCUIT

PIPEconnectio

n BSPm³/h l/s kPa kW kW m³/h l/s kPa kW kW

0306 L 1.5 2030 1.80 25.1 15.72 38.43 2233 1.95 29.0 16.94 41.46

0308 S 1.5 2908 2.60 31.8 22.36 54.95 3199 2.80 36.3 24.08 59.24

0408 S 1.5 4362 3.85 41.7 33.11 81.75 4798 4.20 49.0 35.78 88.40

0410 M 2.5 5678 5.00 20.1 42.11 104.16 6246 5.30 22.3 45.20 111.81

0509 M 2.5 6693 5.70 17.9 48.47 119.95 7362 6.20 20.9 52.34 129.52

0510 M 2.5 7571 6.60 24.4 55.89 138.50 8328 7.20 28.7 60.39 149.66

0511 M 2.5 8449 7.50 32.1 63.17 156.64 9294 8.00 36.2 68.05 168.76

0610 M 2.5 9464 8.20 29.6 69.61 172.68 10410 8.90 34.5 75.17 186.46

0611 M 2.5 10561 9.40 39.5 78.87 195.76 11617 10.00 44.3 84.93 210.82

0612 M 2.5 11659 10.40 49.1 88.01 218.51 12825 11.30 57.3 94.97 235.86

0711 M 2.5 12674 11.30 47.8 94.58 234.88 13941 12.00 53.5 101.82 252.89

0712 M 2.5 13990 12.50 59.2 105.54 262.18 15389 13.40 67.4 113.65 282.39

0713 M 2.5 15307 13.70 72.0 116.40 289.19 16838 14.80 83.2 125.46 311.83

0812 M 2.5 16322 14.50 69.5 122.94 305.51 17954 15.60 79.8 132.45 329.25

0813 M 2.5 17858 16.00 85.5 135.74 337.35 19644 17.20 97.9 146.21 363.51

0913 M 2.5 20409 18.30 82.2 155.08 385.52 22450 19.70 94.4 167.08 415.51

0914 M 3.0 22165 20.00 99.2 169.70 421.86 24382 21.80 116.6 183.49 456.34

1014 M 2.5 24936 22.60 67.1 190.98 474.83 27430 24.40 77.3 206.20 512.93

1015 M 2.5 26911 24.60 80.8 207.52 515.91 29602 26.50 92.7 224.06 557.34

1115 M 2.5 29901 27.30 88.4 230.48 573.08 32891 29.30 100.7 248.72 618.78

1116 M 2.5 32095 29.30 103.3 248.62 618.11 35305 31.80 120.2 268.77 668.61

1216 M 2.5 35305 32.50 114.6 273.73 680.58 38836 35.00 131.4 295.62 735.49

1217 M 2.5 37719 35.00 134.5 293.98 730.81 41491 38.00 156.7 317.93 790.89

1317 M 2.5 41148 38.00 144.9 320.47 796.75 45263 41.00 167.0 346.29 861.54

1417 M 2.5 44577 41.00 156.0 346.96 862.70 49035 45.00 185.8 375.74 934.83

1518 M 2.5 49734 43.00 37.3 358.36 891.88 54707 46.00 42.4 385.99 960.19

1618 M 3.0 53287 46.00 32.4 383.81 955.27 58616 49.00 36.5 413.05 1027.52

1719 M 3.0 60350 52.00 40.3 437.64 1089.48 66385 56.00 46.3 472.09 1174.86

1820 M 3.0 67853 59.00 50.5 495.99 1234.94 74638 63.00 57.1 534.37 1330.17

1822 M 3.0 75315 66.00 63.7 557.29 1387.66 82847 71.00 73.1 601.54 1497.85

1825 M 3.0 86507 77.00 87.8 651.51 1622.04 95158 83.00 101.2 702.19 1748.69

1826 M 3.0 90238 81.00 97.6 683.07 1700.47 99262 87.00 111.7 736.94 1835.19


11

The Cooling Performance Data Table Based On Fresh-Air Mode (III)



MODEL CIRCUITPIPE

connectionBSP

m³/h l/s kPa kW kW m³/h l/s kPa kW kW0306 L 1.5 2030 2.00 38.5 17.36 42.33 2294 2.18 44.8 18.81 45.98

0308 S 1.5 2908 2.85 46.1 24.58 60.24 3259 3.10 53.6 26.64 65.42

0408 M 2.5 4362 4.10 15.2 35.01 86.36 4888 4.50 18.0 37.99 93.83

0410 M 2.5 5678 5.50 28.9 46.72 115.27 6337 6.00 33.8 50.68 125.21

0509 M 2.5 6693 6.40 25.9 54.35 134.34 7483 6.90 29.7 58.76 145.72

0510 M 2.5 7571 7.40 35.4 62.20 153.70 8449 8.00 40.8 67.41 166.78

0511 M 2.5 8449 8.30 45.5 69.93 172.76 9415 8.90 51.7 75.76 187.43

0610 M 2.5 9464 9.20 41.9 77.57 191.87 10561 10.00 48.9 84.13 208.34

0611 M 2.5 10561 10.30 53.5 87.21 215.64 11768 11.20 62.4 94.67 234.36

0612 D 2.5 11659 11.20 44.4 94.38 233.73 12976 12.00 50.5 102.10 253.15

0711 D 2.5 12674 12.00 43.4 101.41 251.39 14122 13.10 51.3 109.91 272.71

0712 D 2.5 13990 13.50 55.3 113.23 280.55 15571 14.60 64.1 122.67 304.28

0713 D 2.5 15307 14.70 66.2 124.64 308.74 17019 16.00 77.7 135.23 335.32

0812 D 2.5 16322 15.70 66.6 131.95 327.08 18165 17.00 77.5 142.98 354.79

0813 D 2.5 17858 17.30 81.4 145.49 360.49 19855 18.60 93.4 157.60 390.93

0913 D 3.0 20409 19.60 84.0 166.01 411.48 22692 21.20 97.5 179.97 446.55

0914 D 3.0 22165 21.50 101.6 181.59 449.89 24624 23.30 118.4 197.04 488.68

1014 D 2.5 24936 24.00 57.6 204.03 505.61 27701 26.50 69.3 221.93 550.47

1015 D 2.5 26911 26.00 68.4 221.41 548.45 29874 28.40 80.7 240.47 596.31

1115 D 2.5 29901 29.20 77.8 246.26 610.04 33193 31.60 90.3 267.18 662.61

1116 D 2.5 32095 31.50 91.6 265.61 657.74 35607 33.80 104.4 287.98 714.00

1216 D 2.5 35305 34.30 99.5 291.80 722.72 39168 37.50 117.7 317.05 786.09

1217 D 2.5 37719 37.00 116.8 313.24 775.51 41823 40.00 135.2 340.01 842.79

1317 D 2.5 41148 40.50 129.6 341.79 846.23 45625 44.00 151.5 371.22 920.14

1417 D 2.5 44577 44.00 143.0 370.34 916.97 49427 48.00 168.7 402.42 997.49

1518 D 2.5 49734 45.50 34.5 384.19 955.61 55130 49.00 39.8 415.71 1034.56

1618 D 3.0 53287 49.00 32.9 411.98 1024.73 59068 53.00 38.3 446.15 1110.33

1719 D 3.0 60350 56.00 42.2 470.42 1169.79 66868 61.00 49.7 510.28 1269.65

1820 D 3.0 67853 63.00 52.5 532.01 1322.66 75151 68.00 60.7 576.42 1434.07

1822 D 3.0 75315 72.00 68.7 600.24 1491.01 83359 77.00 78.1 648.55 1612.63

1825 D 3.0 86507 83.00 92.0 698.24 1733.03 95670 90.00 107.4 757.35 1881.52

1826 D 3.0 90238 86.00 99.1 730.19 1812.01 99774 94.00 117.4 793.01 1969.65


12

The Heating Performance Data Table Based On Return-Air Mode

RETURN-AIR MODE (2 ROWS / 12 FPI)

FACE VELOCITY - 2.5m/s FACE VELOCITY - 2.75m/sA.F W.F W.P.D A.P.D H.C A.F W.F W.P.D A.P.D H.C

MODELMDM CIRCUIT

PIPEconnection

BSPm³/h l/s kPa Pa kW m³/h l/s kPa Pa kW

0306 H 2.5 2030 0.32 1.0 80.1 13 2233 0.335 1.1 94 14

0308 H 2.5 2908 0.48 2.7 80.1 20 3199 0.510 3.0 94 21

0408 H 2.5 4362 0.72 3.2 80.1 30 4798 0.760 3.6 94 32

0410 H 2.5 5678 0.96 6.2 80.1 40 6246 1.000 6.7 94 42

0509 H 2.5 6693 1.10 5.2 80.1 47 7363 1.200 6.1 94 50

0510 H 2.5 7571 1.28 7.3 80.1 53 8328 1.360 8.1 94 57

0511 H 2.5 8449 1.45 9.6 80.1 60 9294 1.540 10.7 94 64

0610 H 2.5 9464 1.60 8.3 80.1 67 10410 1.700 9.3 94 71

0611 H 2.5 10561 1.80 10.8 80.1 75 11617 1.920 12.1 94 80

0612 H 2.5 11659 2.00 13.6 80.1 84 12824 2.120 15.2 94 89

0711 H 2.5 12674 2.15 12.0 80.1 90 13941 2.300 13.6 94 96

0712 H 2.5 13990 2.40 15.2 80.1 101 15389 2.560 17.2 94 107

0713 H 2.5 13507 2.64 18.8 80.1 111 16838 2.800 21.0 94 118

0812 H 2.5 16322 2.80 16.8 80.1 117 17954 3.000 19.1 94 125

0813 H 2.5 17858 3.10 21.0 80.1 129 19644 3.300 23.6 94 137

0913 H 2.0 20409 3.55 15.4 80.1 148 22450 3.750 17.0 94 157

0914 H 2.0 22165 3.85 18.5 80.1 161 24382 4.100 20.7 94 171

1014 H 2.5 24936 4.35 19.7 80.0 182 27429 4.600 21.9 94 193

1015 H 2.5 26911 4.70 23.6 80.1 192 29602 5.000 26.5 94 203

1115 H 2.5 29901 5.20 24.7 80.1 218 32891 5.550 27.9 94 232

1116 H 2.5 32095 5.65 29.8 80.1 236 35305 6.000 33.3 94 251

1216 H 2.5 35305 6.20 31.8 80.1 259 38835 6.600 35.1 94 276

1217 H 2.5 37719 6.65 36.6 80.1 278 41491 7.100 41.3 94 296

1317 H 2.5 41148 7.25 38.4 80.1 303 45263 7.700 42.9 94 322

1417 H 2.5 44577 7.90 40.6 80.1 329 49035 8.400 45.5 94 350

1518 H 2.5 49734 8.30 8.8 80.1 346 54708 8.800 9.8 94 368

1618 H 2.0 53287 8.90 6.0 80.1 371 58615 9.400 6.7 94 394

1719 H 2.0 60350 10.10 7.3 80.1 423 66385 10.800 8.2 94 450

1820 H 2.0 67853 11.50 8.8 80.1 479 74638 12.200 9.8 94 508

1822 H 2.0 75315 12.80 11.2 80.1 536 82846 13.600 12.5 94 569

1825 H 2.0 86507 14.90 15.6 80.1 622 95157 15.900 17.6 94 662

1826 H 2.0 90238 15.60 17.3 80.1 651 99261 16.600 19.4 94 692

Notes:1) Entering Dry Bulb Temperature (EDB): 21°C2) Entering Water Temperature: 60°C3) Leaving Water Temperature: 50°C

13

The Heating Performance Data Table Based On Fresh-Air Mode

RETURN-AIR MODE (2 ROWS / 12 FPI)FACE VELOCITY - 2.5m/s FACE VELOCITY - 2.75m/s

A.F W.F W.P.D A.P.D H.C A.F W.F W.P.D A.P.D H.CMODEL

MDM CIRCUITPIPE

connectionBSP

m³/h l/s kPa Pa kW m³/h l/s kPa Pa kW0306 H 2.5 2030 0.76 5.2 80.1 32 2233 0.81 5.8 94 34

0308 H 2.5 2908 1.13 12.7 80.1 47 3199 1.20 14.2 94 49

0408 H 2.5 4362 1.66 15.3 80.1 70 4798 1.77 17.2 94 74

0410 H 2.5 5678 2.19 28.6 80.1 92 6246 2.33 32.0 94 98

0509 H 2.5 6693 2.56 25.2 80.1 108 7363 2.75 28.8 94 114

0510 H 2.5 7571 2.93 33.9 80.1 122 8328 3.12 38.1 94 130

0511 H 2.5 8449 3.26 43.2 80.1 137 9294 3.50 49.3 94 146

0610 H 2.5 9464 3.65 38.9 80.1 153 10410 3.90 44.0 94 163

0611 H 2.5 10561 4.10 50.2 80.1 171 11617 4.35 56.1 94 183

0612 H 2.5 11659 4.55 63.2 80.1 190 12824 4.85 71.2 94 202

0711 S 2.5 12674 4.70 14.0 80.1 196 13941 5.00 15.8 94 209

0712 S 2.5 13990 5.20 17.3 80.1 218 15389 5.55 19.6 94 232

0713 S 2.5 15307 5.80 21.7 80.1 240 16838 6.10 23.9 94 255

0812 S 2.5 16322 6.10 19.8 80.1 255 17954 6.50 22.4 94 271

0813 S 2.5 17858 6.70 24.1 80.1 280 19644 7.10 26.9 94 298

0913 S 2.5 20409 7.70 29.3 80.1 320 22450 8.10 32.2 94 340

0914 S 3 22165 8.40 35.0 80.1 350 24382 8.90 39.1 94 372

1014 S 2.5 24936 9.40 20.5 80.1 393 27429 10.00 23.1 94 418

1015 S 2.5 26911 10.20 24.4 80.1 426 29602 10.80 27.2 94 453

1115 S 2.5 29901 11.30 26.3 80.1 474 32891 12.00 29.4 94 503

1116 S 2.5 32095 12.20 30.9 80.1 510 35305 13.00 34.9 94 543

1216 S 2.5 35305 13.50 33.6 80.1 562 38835 14.30 37.5 94 597

1217 S 2.5 37719 14.40 38.6 80.1 602 41491 15.30 43.3 94 640

1317 S 2.5 41148 15.70 41.2 80.1 657 45263 16.70 46.3 94 698

1417 S 2.5 44577 17.00 43.7 80.1 711 49035 18.10 49.3 94 765

1518 H 2.5 49734 19.00 42.0 80.1 795 54708 20.10 46.7 94 845

1618 H 2 53287 20.40 27.6 80.1 852 58615 21.60 30.7 94 905

1719 H 2 60350 23.20 33.4 80.1 968 66385 24.60 37.3 94 1028

1820 H 2 67853 26.00 39.6 80.1 1090 74638 28.00 45.4 94 1166

1822 H 2 75315 29.00 50.3 80.1 1215 82846 31.00 56.8 94 1293

1825 S 3 86507 32.30 31.7 80.1 1350 95157 34.20 35.3 94 1433

1826 S 3 90238 33.80 34.7 80.1 1412 99261 36.00 39.2 94 1501

Notes:1) Entering Dry Bulb Temperature (EDB): 0°C2) Entering Water Temperature: 60°C3) Leaving Water Temperature: 50°C

14

The Motor Power Table

MOTOR POWER (kW)

ESP(300Pa) ESP(500Pa)MODEL MDM

4 ROWS 6 ROWS 8ROWS 4 ROWS 6 ROWS 8ROWS

0306 0.75 1.1 1.1 1.1 1.1 1.1

0308 0.55x2 0.55x2 0.75x2 0.75x2 0.75x2 1.1x2

0408 1.5 2.2 2.2 2.2 2.2 3

0410 2.2 3 4 4

0509 2.2 2.2 3 3 3 4

0510 2.2 3 3 3 4 4

0511 3 3 4 4 4 4

0610 4 4 4 4 5.5 5.5

0611 4 4 5.5 5.5 5.5 5.5

0612 4 4 5.5 5.5 5.5 5.5

0711 4 5.5 5.5 5.5 7.5 7.5

0712 4 5.5 7.5 7.5 7.5 7.5

0713 5.5 5.5 7.5 7.5 7.5 11

0812 5.5 7.5 7.5 7.5 7.5 11

0813 5.5 7.5 7.5 7.5 11 11

0913 7.5 7.5 11 11 11 11

0914 7.5 7.5 11 11 11 11

1014 7.5 11 11 11 11 15

1015 11 11 11 11 11 15

1115 11 11 11 11 15 15

1116 11 11 11 11 15 15

1216 11 11 15 15 15 18.5

1217 11 15 15 15 18.5 18.5

1317 11 15 15 15 18.5 22

1417 15 15 18.5 18.5 18.5 22

1518 15 18.5 18.5 18.5 22 22

1618 15 18.5 22 22 22 30

1719 18.5 22 22 22 30 30

1820 22 22 30 30 30 30

1822 22 30 30 30 37 37

1825 30 30 37 37 37 37

1826 37 37 37 37 45 45

15

Outlines & DimensionsHorizontal Arranged Unit Dimension

Top Inverted Discharge (TI)

Top Discharge (T)

Front Discharge (F)

Front Inverted Discharge (FI)

16

DIMENSION OF COIL SECTION (mm)MODELMDM

AIR FLOWm³/h HEIGHT WIDTH QTY H W L E F G P J K Q M N

0306 1876~2293 304.8 740 1 580 1010 1490 50 0 66+(n-3)x33 0 0 ---- ---- 158 246

0308 2666~3259 304.8 1060 1 580 1330 1490 50 0 66+(n-3)x33 0 0 ---- ---- 158 246

0408 3999~4888 457.2 1060 1 740 1330 1650 50 0 66+(n-3)x33 0 0 ---- ---- 158 398

0410 5184~6337 457.2 1380 1 740 1650 1970 50 0 66+(n-3)x33 0 0 ---- ---- 158 398

0509 6122~7483 609.6 1220 1 900 1490 1970 50 0 66+(n-3)x33 0 0 ---- ---- 158 551

0510 6912~8449 609.6 1380 1 900 1650 1650 50 0 66+(n-3)x33 0 0 ---- ---- 158 551

0511 7703~9414 609.6 1540 1 900 1810 1650 50 0 66+(n-3)x33 0 0 ---- ---- 158 551

0610 8640~10561 762.0 1380 1 1110 1650 1970 100 0 66+(n-3)x33 0 0 410 98 183 703

0611 9628~11767 762.0 1540 1 1110 1810 2130 100 0 66+(n-3)x33 0 0 410 98 183 703

0612 10616~12975 762.0 1700 1 1110 1970 1810 100 0 66+(n-3)x33 0 0 410 98 183 703

0711 11554~14121 914.4 1540 1 1270 1810 2450 100 0 66+(n-3)x33 0 0 410 98 183 855

0712 12739~15570 914.4 1700 1 1270 1970 2450 100 0 66+(n-3)x33 0 0 410 98 183 855

0713 13924~17019 914.4 1860 1 1270 2130 2450 100 0 66+(n-3)x33 0 0 410 98 183 855

0812 14862~18165 1066.8 1700 1 1430 1970 2610 100 0 66+(n-3)x33 0 0 443 98 183 1007

0813 16245~19855 1066.8 1860 1 1430 2130 2610 100 0 66+(n-3)x33 0 0 443 98 183 1007

0913 18566~22691 1219.2 1860 1 1590 2130 2770 100 0 66+(n-3)x33 0 0 443 98 183 1160

0914 20146~24623 1219.2 2020 1 1590 2290 2770 100 0 66+(n-3)x33 0 0 443 98 183 1160

1014 22664~27701 685.8 2020 2 1750 2290 2930 100 627 66+(n-3)x33 0 0 443 98 183 627

1015 24442~29873 685.8 2180 2 1750 2450 2980 100 627 66+(n-3)x33 0 0 443 98 183 627

1115 27157~33192 762.0 2180 2 1910 2450 2980 100 703 66+(n-3)x33 0 0 443 98 183 703

1116 29133~35607 762.0 2340 2 1910 2610 3300 100 703 66+(n-3)x33 0 0 443 98 183 703

1216 32046~39167 838.2 2340 2 2070 2610 3300 100 779 66+(n-3)x33 0 0 443 98 183 779

1217 34218~41823 838.2 2500 2 2070 2770 3300 100 779 66+(n-3)x33 0 0 443 98 183 779

1317 37329~45624 914.4 2500 2 2230 2770 3300 100 855 66+(n-3)x33 0 0 443 98 183 855

1417 40440~49427 990.6 2500 2 2390 2770 3300 100 931 66+(n-3)x33 0 0 443 98 183 931

1518 43551~53229 1066.8 1295 4 2550 2930 4100 100 1007 66+(n-3)x33 0 G 674 98 183 1007

1618 48328~59067 1143.0 1295 4 2710 2930 4100 100 1083 66+(n-3)x33 231 G 674 98 183 1083

1719 54710~66867 1219.2 1365 4 2870 3090 4100 100 1160 66+(n-3)x33 231 G 674 98 183 1160

1820 61487~75150 1295.4 1445 4 3030 3250 4260 100 1236 66+(n-3)x33 231 G 674 98 183 1236

1822 68202~83359 1295.4 1615 4 3030 3570 3460 100 1236 66+(n-3)x33 231 G 674 98 183 1236

1825 78275~95670 1295.4 1855 4 3030 4050 3780 100 1236 66+(n-3)x33 231 G 674 98 183 1236

1826 81633~99774 1295.4 1935 4 3030 4210 3780 100 1236 66+(n-3)x33 231 G 674 98 183 1236

Note : n = number of coil row

17

DIMENSION OF FAN SECTION (mm)

A B C DMODELMDM

AIR FLOWm³/h

F FI T TI F FI T TI F FI T TI F FI T TI

0306 1876~2293 ---- 205 ---- 205 ---- 0 ---- 0 ---- 0 ---- 0 ---- 191 ---- 219

0308 2666~3259 ---- 205 ---- 205 ---- 250 ---- 250 ---- 205 ---- 205 ---- 191 ---- 219

0408 3999~4888 ---- 325 ---- 325 ---- 0 ---- 0 ---- 0 ---- 0 ---- 162 ---- 227

0410 5184~6337 ---- 325 ---- 325 ---- 250 ---- 250 ---- 325 ---- 325 ---- 172 ---- 236

0509 6122~7483 ---- 404 ---- 404 ---- 0 ---- 0 ---- 0 ---- 0 ---- 172 ---- 274

0510 6912~8449 ---- 404 404 404 ---- 0 0 0 ---- 0 0 0 ---- 172 219 387

0511 7703~9414 ---- 404 404 404 ---- 0 0 0 ---- 0 0 0 ---- 172 219 387

0610 8640~10561 453 453 ---- 453 0 0 ---- 0 0 0 ---- 0 365 175 ---- 260

0611 9628~11767 ---- 507 ---- 507 ---- 0 ---- 0 ---- 0 ---- 0 ---- 206 ---- 328

0612 10616~12975 ---- 507 507 507 ---- 0 0 0 ---- 0 0 0 ---- 206 221 441

0711 11554~14121 569 569 569 569 0 0 0 0 0 0 0 0 475 227 151 400

0712 12739~15570 569 569 569 569 0 0 0 0 0 0 0 0 475 227 151 400

0713 13924~17019 569 569 569 569 0 0 0 0 0 0 0 0 475 227 151 400

0812 14862~18165 638 638 ---- 638 0 0 ---- 0 0 0 ---- 0 497 227 ---- 376

0813 16245~19855 638 638 ---- 638 0 0 ---- 0 0 0 ---- 0 497 227 ---- 376

0913 18566~22691 715 715 715 715 0 0 0 0 0 0 0 0 530 229 132 733

0914 20146~24623 715 715 715 715 0 0 0 0 0 0 0 0 530 229 132 733

1014 22664~27701 801 801 810 801 0 0 0 0 0 0 0 0 572 228 147 491

1015 24442~29873 801 801 810 801 0 0 0 0 0 0 0 0 572 228 147 491

1115 27157~33192 801 801 810 801 0 0 0 0 0 0 0 0 572 228 147 491

1116 29133~35607 ---- 898 898 898 ---- 0 0 0 ---- 0 0 0 ---- 275 180 571

1216 32046~39167 898 898 898 898 0 0 0 0 0 0 0 0 666 275 180 571

1217 34218~41823 898 898 898 898 0 0 0 0 0 0 0 0 666 275 180 571

1317 37329~45624 1010 1010 ---- 1010 0 0 ---- 0 0 0 ---- 0 722 275 ---- 545

1417 40440~49427 1010 1010 ---- 1010 0 0 ---- 0 0 0 ---- 0 722 275 ---- 545

1518 43551~53229 1130 1130 1130 1130 0 0 0 0 0 0 0 0 779 275 168 672

1618 48328~59067 1130 1130 1130 1130 0 0 0 0 0 0 0 0 779 275 168 672

1719 54710~66867 1130 1130 1130 1130 0 0 0 0 0 0 0 0 779 275 168 672

1820 61487~75150 1270 1270 1270 1270 0 0 0 0 0 0 0 0 802 277 169 694

1822 68202~83359 1270 1270 1270 1270 0 0 0 0 0 0 0 0 802 277 169 694

1825 78275~95670 1420 1420 1420 1420 0 0 0 0 0 0 0 0 870 277 217 810

1826 81633~99774 1420 1420 1420 1420 0 0 0 0 0 0 0 0 870 277 217 810

18

Vertical Arranged Units Dimension

Top Inverted Discharge (TI)

Top Discharge (T)

Front Inverted Discharge (FI)

Front Discharge (F)

19

DIMENSION OF COIL SECTION (mm)MODELMDM

AIR FLOWm³/h HEIGHT WIDTH QTY H H1 W L E F G T J Q M N

0306 1876~2293 304.8 740 1 1110 530 1010 800 50 0 66+(n-3)x33 0 0 ---- 158 246

0308 2666~3259 304.8 1060 1 1110 530 1330 800 50 0 66+(n-3)x33 0 0 ---- 158 246

0408 3999~4888 457.2 1060 1 1430 690 1330 960 50 0 66+(n-3)x33 0 0 ---- 158 398

0410 5184~6337 457.2 1380 1 1430 690 1650 1280 50 0 66+(n-3)x33 0 0 ---- 158 398

0509 6122~7483 609.6 1220 1 1750 850 1490 1280 50 0 66+(n-3)x33 0 0 ---- 158 551

0510 6912~8449 609.6 1380 1 1750 850 1650 960 50 0 66+(n-3)x33 0 0 ---- 158 551

0511 7703~9414 609.6 1540 1 1750 850 1810 960 50 0 66+(n-3)x33 0 0 ---- 158 551

0610 8640~10561 762.0 1380 1 2120 1010 1650 1280 100 0 66+(n-3)x33 0 0 98 183 703

0611 9628~11767 762.0 1540 1 2120 1010 1810 1440 100 0 66+(n-3)x33 0 0 98 183 703

0612 10616~12975 762.0 1700 1 2120 1010 1970 1120 100 0 66+(n-3)x33 0 0 98 183 703

0711 11554~14121 914.4 1540 1 2440 1170 1810 1760 100 0 66+(n-3)x33 0 0 98 183 855

0712 12739~15570 914.4 1700 1 2440 1170 1970 1760 100 0 66+(n-3)x33 0 0 98 183 855

0713 13924~17019 914.4 1860 1 2440 1170 2130 1760 100 0 66+(n-3)x33 0 0 98 183 855

0812 14862~18165 1066.8 1700 1 2760 1330 1970 1760 100 0 66+(n-3)x33 0 0 98 183 1007

0813 16245~19855 1066.8 1860 1 2760 1330 2130 1760 100 0 66+(n-3)x33 0 0 98 183 1007

0913 18566~22691 1219.2 1860 1 3080 1490 2130 1920 100 0 66+(n-3)x33 0 0 98 183 1160

0914 20146~24623 1219.2 2020 1 3080 1490 2290 1920 100 0 66+(n-3)x33 0 0 98 183 1160

1014 22664~27701 685.8 2020 2 3400 1650 2290 2080 100 627 66+(n-3)x33 0 0 98 183 627

1015 24442~29873 685.8 2180 2 3400 1650 2450 2080 100 627 66+(n-3)x33 0 0 98 183 627

DIMENSION OF FAN SECTION (mm)A B C DMODEL

MDMAIR FLOW

m³/hF FI T TI F FI T TI F FI T TI F FI T TI

0306 1876~2293 ---- 205 ---- 205 ---- 0 ---- 0 ---- 0 ---- 0 ---- 191 ---- 219

0308 2666~3259 ---- 205 ---- 205 ---- 250 ---- 250 ---- 205 ---- 205 ---- 191 ---- 219

0408 3999~4888 ---- 325 ---- 325 ---- 0 ---- 0 ---- 0 ---- 0 ---- 162 ---- 227

0410 5184~6337 ---- 325 ---- 325 ---- 250 ---- 250 ---- 325 ---- 325 ---- 172 ---- 236

0509 6122~7483 ---- 404 ---- 404 ---- 0 ---- 0 ---- 0 ---- 0 ---- 172 ---- 274

0510 6912~8449 ---- 404 404 404 ---- 0 0 0 ---- 0 0 0 ---- 172 219 387

0511 7703~9414 ---- 404 404 404 ---- 0 0 0 ---- 0 0 0 ---- 172 219 387

0610 8640~10561 453 453 ---- 453 0 0 ---- 0 0 0 ---- 0 365 175 ---- 260

0611 9628~11767 ---- 507 ---- 507 ---- 0 ---- 0 ---- 0 ---- 0 ---- 206 ---- 328

0612 10616~12975 ---- 507 507 507 ---- 0 0 0 ---- 0 0 0 ---- 206 221 441

0711 11554~14121 569 569 569 569 0 0 0 0 0 0 0 0 475 227 151 400

0712 12739~15570 569 569 569 569 0 0 0 0 0 0 0 0 475 227 151 400

0713 13924~17019 569 569 569 569 0 0 0 0 0 0 0 0 475 227 151 400

0812 14862~18165 638 638 ---- 638 0 0 ---- 0 0 0 ---- 0 497 227 ---- 376

0813 16245~19855 638 638 ---- 638 0 0 ---- 0 0 0 ---- 0 497 227 ---- 376

0913 18566~22691 715 715 715 715 0 0 0 0 0 0 0 0 530 229 132 733

0914 20146~24623 715 715 715 715 0 0 0 0 0 0 0 0 530 229 132 733

1014 22664~27701 801 801 810 801 0 0 0 0 0 0 0 0 572 228 147 491

1015 24442~29873 801 801 810 801 0 0 0 0 0 0 0 0 572 228 147 491

Note: n = number of coil row

Sec

tio

ns

Len

gth

Mo

du

lus

Tab

le

Leng

th (

M)

plat

e he

at re

cove

ryro

tary

whe

el h

eat r

ecov

ery

Sec

tion

nam

eex

haus

tba

g fil

ter

acce

ss d

oor

soun

d at

tenu

atio

ndi

ffuse

rfa

nhu

mid

ifier

cool

ing

coil

pref

ilter

elec

tric

hea

ting

heat

ing

coil

mix

ing

box

seco

ndar

ym

ixin

g bo

xdi

fflue

nce

sche

me

Asc

hem

e B

sche

me

Asc

hem

e B

air

flow

(CM

H)

5000

4M4M

4M5M

~7M

4M4M

2M2M

4M3M

8M8M

6M4M

10M

1000

04M

4M4M

5M~7

M4M

4M2M

2M4M

3M8M

18M

12M

4M14

M

1500

04M

4M4M

5M~7

M4M

4M2M

2M4M

3M8M

18M

12M

4M16

M

2000

06M

4M6M

5M~7

M6M

4M2M

2M6M

4M12

M18

M12

M5M

18M

2500

06M

4M6M

5M~7

M6M

4M2M

2M6M

4M12

M-

-5M

20M

3000

06M

4M6M

5M~7

M6M

4M2M

2M6M

4M12

M-

-5M

-

3500

06M

4M6M

5M~7

M6M

4M2M

2M6M

4M12

M-

-5M

-

4000

06M

4M6M

5M~7

M6M

4M2M

2M6M

4M12

M-

-5M

-

4500

08M

4M6M

5M~7

M6M

4M2M

2M8M

4M16

M-

-5M

-

5000

08M

4M6M

5M~7

M6M

4M2M

2M8M

4M16

M-

-5M

-

5500

08M

4M6M

5M~7

M6M

4M2M

2M8M

4M16

M-

-5M

-

6000

08M

4M6M

5M~7

M6M

4M2M

2M8M

5M16

M-

-5M

-

6500

010

M4M

6M5M

~7M

6M4M

2M2M

10M

5M20

M-

-5M

-

7000

010

M4M

6M5M

~7M

6M4M

2M2M

10M

5M20

M-

-5M

-

7500

010

M4M

6M5M

~7M

6M4M

2M2M

10M

5M20

M-

-5M

-

8000

010

M4M

6M5M

~7M

6M4M

2M2M

10M

5M20

M-

-5M

-

8500

010

M4M

6M5M

~7M

6M4M

2M2M

10M

5M20

M-

-5M

-

9000

010

M4M

6M5M

~7M

6M

Please refer to fan section dimension table

4M

Please refer to coil section dimension table

2M2M

10M

5M20

M-

-5M

-

Not

es : 1)

M =

160

mm

2)

Sec

tion

leng

th =

Sec

tion

leng

th m

odul

us x

160

+ 5

0 (m

m)

3)

The

tota

l len

gth

of th

e un

it =

? (

All

the

sect

ion

leng

th m

odul

us)

x 16

0 +

The

qua

ntiti

es o

f sec

tions

x 5

0 (m

m)

4)

The

prin

cipl

e to

def

ine

the

leng

th m

odul

us o

f the

sec

tion

is c

hoos

ing

the

smal

lest

mod

ulus

bec

ause

ther

e ar

e m

ultip

le c

hoic

es fo

r the

sam

e ai

rflo

w

20

21

Filter Section

Good air quality is of utmost importance. A key ingredient in maintaining good air quality is air filtration. Ourstandard configuration of the filter is flat panel pre-filter and the material is non-moving cloth with theefficiency G3. The bag media filter and HEPA filter are optional.

WEIGHT (Kg) INICIAL RESISTANCE (Pa)MODEL SPECIFICATION (QUANTITY)

FLAT PANEL BAG FLAT PANEL BAG

0306 15"x16"(1) 15"x20"(1) 0 0 74 126 65 55

0308 15"x16"(3) 0 0 0 84 144 65 55

0408 20"x16"(3) 0 0 0 86 148 65 55

0410 20"x20"(3) 0 0 0 96 166 65 55

0509 25"x20"(2) 25"x16"(1) 0 0 95 165 65 55

0510 25"x20"(3) 0 0 0 100 174 65 55

0511 25"x16"(3) 25"x20"(1) 0 0 103 179 65 55

0610 16"x20"(6) 0 0 0 104 182 65 55

0611 16"x16"(6) 16"x20"(2) 0 0 107 187 65 55

0612 16"x16"(2) 16"x20"(6) 0 0 112 196 65 55

0711 20"x16"(6) 20"x20"(2) 0 0 112 196 65 55

0712 20"x16"(2) 20"x20"(6) 0 0 117 205 65 55

0713 20"x20"(8) 0 0 0 123 215 65 55

0812 20"x16"(1) 20"x20"(3) 25"x16"(1) 25"x20"(3) 123 217 65 55

0813 20"x20"(4) 25"x20"(4) 0 0 127 223 65 55

0913 25"x20"(8) 0 0 0 139 247 65 55

0914 25"x20"(6) 25"x25"(2) 0 0 142 252 65 55

1014 20"x20"(9) 20"x25"(3) 0 0 150 268 65 55

1015 20"x20"(6) 20"x25"(6) 0 0 155 277 65 55

1115 20"x20"(4) 20"x25"(6) 25"x25"(2) 0 157 281 65 55

1116 20"x25"(8) 25"x25"(4) 0 0 160 286 65 55

1216 25"x25"(8) 20"x25"(4) 0 0 169 303 65 55

1217 25"x20"(9) 25"x25"(2) 20"x20"(4) 0 178 320 65 55

1317 25"x20"(12) 25"x25"(3) 0 0 182 328 65 55

1417 20"x20"(16) 20"x25"(4) 0 0 187 337 65 55

1518 20"x20"(6) 20"x25"(11) 25"x25"(3) 0 193 349 65 55

1618 25"x20"(9) 25"x25"(11) 0 0 198 358 65 55

1719 25"x20"(4) 25"x25"(16) 0 0 207 375 65 55

1820 20"x25"(15) 25"x25"(10) 0 0 218 396 65 55

1822 20"x20"(9) 20"x25"(15) 25"x25"(6) 0 226 408 65 55

1825 20"x20"(24) 25"x20"(16) 0 0 233 419 65 55

1826 20"x20"(6) 20"x25"(19) 25"x25"(10) 0 238 428 65 55

Notes:

1) The section weight includes the weight of filter and casing.

2) The specification of the flat panel filter and bag filter is the same except the thickness. The thickness of flat panel filter is 2

inches; the thickness of bag filter is 1 inch and the length of bag is 15 inches.

22

Mixing Section

When outside and return air mixing is needed, a mixing box section can be selected. The damper on themixing box will regulate the amount of outside and return air supplied to the conditioned space. Theproportion of the return air and fresh air depend on the need of the design. In general the amount of returnair is larger than that of the fresh air, so in order to economize the length of the unit, we often put the freshair damper on the top of the unit. The damper used for our unit has lower leakage rate at higher staticpressure. It can maximize the energy efficiency.

Dimension of the Mixing Box and Damper

MODEL MDM AIR FLOW(m³/h) L H W A1 A2 B2 D WEIGHT

(Kg)

0306 2030 640 580 1010 130 90 500 255 124

0308 2908 640 580 1330 190 130 500 415 144

0408 4362 640 740 1330 240 160 600 365 152

0410 5678 640 740 1650 240 160 800 425 170

0509 6693 640 900 1490 250 180 800 425 174

0510 7571 640 900 1650 300 200 800 345 187

0511 8449 640 900 1810 300 200 900 425 197

0610 9464 640 1110 1650 390 260 800 425 206

0611 10561 640 1110 1810 390 260 900 455 216

0612 11659 640 1110 1970 390 260 1000 485 230

0711 12674 640 1270 1810 420 280 1000 380 238

0712 13990 640 1270 1970 450 310 1000 485 256

0713 15307 640 1270 2130 420 280 1200 465 274

0812 16322 640 1430 1970 450 300 1200 385 288

0813 17858 960 1430 2130 500 330 1200 465 408

0913 20409 960 1590 2130 560 375 1200 465 449

0914 22165 960 1590 2290 500 320 1500 395 465

1014 24936 960 1750 2290 550 360 1500 395 500

1015 26911 960 1750 2450 600 400 1500 475 526

1115 29901 960 1910 2450 650 420 1500 475 552

1116 32095 960 1910 2610 580 380 1800 405 578

1216 35305 960 2070 2610 650 430 1800 405 632

1217 37719 960 2070 2770 625 400 2000 385 666

1317 41148 1280 2230 2770 650 450 2000 385 844

1417 44577 1280 2390 2770 740 475 2000 385 880

1518 49734 1280 2550 2770 825 550 2000 465 924

1618 53287 1280 2710 2930 875 575 2000 465 960

1719 60350 1600 2870 3090 900 590 2200 445 1190

1820 67853 1600 3030 3250 1000 680 2200 525 1270

1822 75315 1600 3030 3570 1130 720 2200 685 1330

1825 86507 1600 3030 4050 1150 870 2500 925 1380

1826 90238 1600 3030 4210 1200 800 2500 855 1450

Note: Dimensions in mm

23

Section WeightsCoil and Cabinet Weights

COIL WEIGHT (kg)MODELMDM 1ROW 2ROWS 3ROWS 4ROWS 5ROWS 6ROWS 8ROWS 10ROWS 12ROWS

CABINETWEIGHT

(kg)

0306 20 22 25 28 30 34 40 50 55 190

0308 22 24 28 32 36 39 46 55 60 227

0408 26 28 33 38 43 48 50 65 72 259

0410 30 32 36 42 46 50 54 72 80 340

0509 32 34 37 44 47 52 68 84 100 336

0510 40 50 60 72 83 95 115 135 155 312

0511 44 56 68 80 93 105 129 153 177 336

0610 45 58 71 84 97 110 136 162 188 377

0611 50 65 80 95 110 125 155 185 215 423

0612 55 71 87 103 119 135 167 199 231 399

0711 60 78 96 114 132 150 184 218 252 493

0712 63 82 101 120 139 158 196 234 272 519

0713 66 88 110 132 154 176 220 264 308 546

0812 76 100 124 148 172 196 244 292 340 672

0813 84 109 134 159 184 209 259 309 359 705

0913 90 117 144 171 198 225 279 333 387 761

0914 98 128 158 188 218 248 308 368 428 841

1014 110 143 176 209 242 275 341 407 473 904

1015 120 156 192 228 264 300 372 444 516 939

1115 135 175 215 255 295 335 415 495 575 967

1116 146 190 234 278 322 366 454 542 630 1083

1216 150 198 246 294 342 390 486 582 678 1113

1217 164 214 264 314 364 414 514 614 714 1152

1317 170 222 274 326 378 430 534 638 742 1183

1417 176 231 286 341 396 451 561 671 781 1214

1518 182 245 308 371 434 497 623 749 875 1424

1618 189 257 325 393 461 529 665 801 937 1553

1719 204 282 360 438 516 594 742 890 1038 1636

1820 214 299 384 469 554 639 809 979 1149 1772

1822 223 317 411 505 599 693 881 1069 1257 1601

1825 242 348 454 560 666 772 984 1196 1408 1844

1826 252 358 464 570 676 782 994 1206 1418 1889

24

Fan Weights

MODEL 0306 0308 0408 0410 0509 0510 0511 0610

FAN SIZE (mm) 160 160*2 250 250G2 315 315 315 355

WEIGHT (kg) 8.4 17 18 36 29 29 29 38

MODEL 0611 0612 0711 0712 0713 0812 0813 0913

FAN SIZE (mm) 400 400 450 450 450 500 500 560

WEIGHT (kg) 48 48 60 60 60 88 88 110

MODEL 0914 1014 1015 1115 1116 1216 1217 1317

FAN SIZE (mm) 560 630 630 630 710 710 710 800

WEIGHT (kg) 110 122 122 122 228 228 228 286

MODEL 1417 1518 1618 1719 1820 1822 1825 1826

FAN SIZE (mm) 800 900 900 900 1000 1000 1120 1120

WEIGHT (kg) 286 348 348 348 406 406 900 900

Motor Weights

MOTOR OUTPUT 1.1 kW 1.5 kW 2.2 kW 3 kW 4 kW 7.5 kW 11 kW

WEIGHT (kg) 20 22 30 30 42 65 118

MOTOR OUTPUT 15 kW 18.5 kW 22 kW 30 kW 37 kW 45 kW

WEIGHT (kg) 139 189 203 290 320 348

25

InstallationReceivingAll units leaving the McQuay plant have been inspected to ensure the shipment of quality products. Allreasonable means are utilized to properly package the air handing units. Carefully inspect all shipmentsimmediately upon delivery. When damage is visible, note this fact on the carrier’s freight bill and request thatthe carrier sends a representative to inspect the damage. This may be done by telephone or in person, butshould always be confirmed in writing. The shipment should be unpacked in the presence of the agent sothat the extent of the damage or loss can be determined. The carrier’s agent will make an inspection reportand a copy will be given to the consignee for forwarding to the carrier with a formal claim.

RiggingAir handling units are shipped on skids with sections bolted together as determined by truck or rail sizelimitations. Figure 1 illustrates the proper rigging to be used in moving the Air handling units. Ropes orcables are to be placed around the unit across the bottom channels. Spreader bars must be used to avoiddamage to the top of the unit. Caution must be exercised to the coil connections, operator arm for units withvariable inlet vanes, and damper operators are not damaged.

Figure 1

StorageIf the units are to be stored out of doors, prior to installation within the building, special care should be takento protect the units from dust, rain, snow, and rodents. The units should be protected from constantexposure to rain and snow.

26

FoundationThe floor and foundation on which the units are to be located shall be rigid and level to avoid vibration andassure proper venting and draining. The structure shall be capable of supporting the weight of the unit,including the fan motor and the water or refrigerant within the coils.

Pitch the piping toward an open drain and install a plug to facilitate cleaning. Install a cap on the drainconnection not used. Trap the drain line as shown in Figure 2. ‘H’ dimension to be minimum of 1/2” plus totalstatic pressure. A minimum length of foundation on which the units are to be located must be provided toassure installing the trap and drain plug.

Figure 2

Unit InstallationInstallation and maintenance should be performed by qualified persons who are familiar with local code andregulation, and experienced with this type of appliance.

1) Prior to installation, clean the inside of the units. (Caution: Sharp edges and coil surfaces arepotential locations, which may cause injury hazards. Avoid from being in contact with these places)

2) Prior to installation, check the ease of operation of the moving components and the regulationequipment by hand.

3) Allow sufficient space around the unit for opening the access door, adjusting belt tension, andremoving filters, motor and drive package. A minimum clearance equal to the width of the unit mustbe provided on one side of the unit for removing the coil, shaft, and wheel.

4) The ductwork can not be supported by the unit only, it must be supported by other hangers orstands.

5) Ductwork, which is connected to the fan discharge should run in a straight line for at least 1-1/2 fandiameters and should not be reduced in cross sectional area.

6) The gasket material with a pressure sensitive adhesive should be attached to the mating flangesbefore the bolts are placed in the flanges to secure the matching unit sections, in order to avoid airleakage or cold bridge.

7) Check the cleanliness of the filter before installation.8) Install the filter after the installation of all other components.

27

Operation• Lock out the electrical power to prevent accidental fan operation. Check the inside of the unit and

ductwork to make sure that no loose nuts, bolts, trash, sheet metal parts and etc. These items might besucked into the fan and result in permanent damage. At the same time check to make sure that the airfilters have been placed in the filter section, with end seals in place.

• Rotate the fan shaft by hand to make sure that it is free and no obstructions have been incurred duringshipment or installation.

• Drainpipe must be in downward gradient for smooth drainage.• Recheck the sheave alignment with a straight edge and the belt tension for proper values.(Refer to

Table 1)• Refer to the fan motor manufacture’s instructions attached to the fan motor and check each item prior to

startup.• Unlock the collar tightening spring isolator and check the tightness of the isolator mounting hardware,

set screws and locking collars on the bearings, and the motor mount adjusting nuts.• After the above items have been checked, apply power to the motor for a short interval to ensure that

the motor is rotating in the proper direction as indicated by the arrow on the side of the unit. Also checkmotor speed with a tachometer.

• When the fan motor power is higher than 5.5kW, star-delta starter or other dropping voltage startershould be supplied by user as required. At the same time, confirm that the unit has been GROUNDEDbefore operation.

28

MaintenanceGeneralA good general maintenance plan will avoid loses and unexpected shutting down of the equipment.1) Dirty filters reduce air flow as well as unit performance. Thus changing or cleaning the filters is very

important. Check the cleanliness of filter and replace or clean as required for every month.2) Coils shall be cleaned of dust, dirt or lint with compressed air, water. They can be brushed with a soft

brush and vacuum cleaner.3) Water coil, which is not used during winter, shall be drained or added with anti-freezing solution to

avoid freezing.

Month intervals1) Thoroughly clean the fan to assure correct balance for every six months.2) Inspect and clean condensate pan to avoid clogging of drainage with dirt, dust, etc. Inspect drainage

piping to ensure the proper condensate flow. If humidifier is installed, check for build up of mineraldeposits.

3) Check the operation of damper mechanisms and adjust arms and damper blades for a proper position.4) Check the bearings for tightness. Bearing set screws must be tight against the shaft.5) Hose the coils with low-pressure water hose or low-pressure air hose.6) It is very important to verify pulley alignment. For single or multiple groove pulleys, aligns central

groove in motor pulley with central groove on fan pulley using a flat edge metallic rule with four-pointmethod (Figure 3).

Figure 3

7) Use the same belt brand and size .Do not mix used with new belts. Be sure that the belts correspondto the pulley grooves.

8) Check and adjust belt tension with a tension calibrator (Figure 4 & 5).

Figure 4 Figure 5

29

Table 1: Belt Tensioning Forces

Force required to deflect belt 16 mm per meter of spanDeflection Force

(N)Belt Section Small Pulley Diameter Range(mm) Min. Max

SPZ 56 ~ 95100 ~ 140

1320

2025

SPA 80 ~ 132140 ~ 200

2535

3545

SPB 112 ~ 224236 ~ 315

4565

6585

SPC 224 ~ 355375 ~ 560

85115

115150

WARNING: Improper pulley alignment and belt tension are the most frequent causes of excessive vibration as well as shortened belt and bearing life. It is important to install the pulleys as close as practical to the bearing.

CAUTION: Do not over tighten the belts or the bearings, they may become damaged.

30

Troubleshooting

SYMPTOM SOURCE PROBABLE CAUSE

1. Impeller hitting inlet ring • Impeller not centered (check shaft clamp).• Inlet ring damaged or not adjusted.• Shaft loose in bearing (check locking Collar).• Impeller loose on shaft (check shaft clamp).• Bearing loose in bearing support (check mounting bolts).

2. Drive • Sheave not tight on shaft (motor or fan).• Belts loose. Adjust after 48 hours operation.• Belt too tight.• Belt wrong cross section.• Belt not matched in length on multi-belt drive.• Variable pitch sheaves not adjusted so each groove has the same pitch diameter (multi-belt drives).• Sheaves misalign.• Belt worn.• Motor, motor base or fan not securely anchored.• Belt oily or dirty.

3. Bearing • Defective bearing.• Needs lubrication.• Loose on bearing support.• Loose on shaft (check locking collar).• Misalign (check alignment binding).• Foreign material inside bearing.• Worn bearing.• Fretting corrosion between inner race and shaft.

4. Impeller • Loose on shaft (check shaft clamp).• Defective impeller. Do not run fan. Contact manufacturer.• Unbalance.• Foreign material on fan blades.

5. Housing • Foreign material in housing.• Inlet cones loose or not fan blades.

6. Electrical • Lead-in cable is not secure or is too rigid.• AC hum in motor or relay.• Starting relay chatter.• Motor bearings.• Single phasing a 3-phase motor.

7. Shaft • Bent or undersized. May cause noise at impeller,bearings or sheave.

• Loose internal balance weights.• Bearing alignment.

Noise

8. High air velocity • Ductwork too small.• Fan running too small.• Fan selection too small.• Static pressure lower than expected.• Registers and grilles too small.• Insufficient face area of heating or cooling coil.

31


9. Obstruction in highvelocity air stream, maycause rattle or pure tonewhistle

• Dampers• Registers.• Loose damper or splitters.• Grilles.• Sharp elbows.• Sudden expansion of ductwork.• Sudden contraction of ductwork.• Turning vanes.

10. Pulsation surge • Oversized duct work.• Parallel fan operation.• Loose dampers or splitters.• System instability.• Ducts vibrate at same frequency as fan pulsation.• Organ pipe action on long duct.

11. High velocity throughcracks, holes or pastobstructions

• Leaks in ductwork, registers or grilles

Noise

12. Rattles and / or rumbles • Excessive duct velocities.• Vibrating ductwork.• Flex connector too tight or touching.• Vibrating cabinet parts.• Vibrating parts not isolated from building.

1. Fan • Forward curve impeller installed backwards.• Fan running backwards.• Impeller not centered with inlet cones.• Fan speed too slow.

2. Duct system • Actual system is more restrictive (more resistance toflow) than expected.

• Dampers closed. Splitter rod disconnected.• Registers closed.• Leaks in supply ducts.• Open duct seams.• Insulating duct liner looses.• Fire dampers closed.

3. Filters • Dirty or clogged (dirt, lint, snow, and grass).

4. Coils • Dirty or clogged (construction trash)

5. Recirculation • Internal cabinet leaks in bulkhead separating fan outlet(pressure zone) from fan inlets (suction zone). Leaksaround fan outlet at connection through cabinetbulkhead.

Air flow low

6. Obstructed fan inlets • Elbows, cabinet walls or other obstructions causerestrictive systems but do not increase negativepressure readings near the fan inlet(s). Fan speed maybe increased to counteract the effect of restricted faninlet(s). (Observe fan RPM limits)

32


7. No straight duct atfan outlet

• Fans, which are normally used in duct systems, aretested with a length of straight duct at the fan outlet. Theperformance will be decreased If there is no straightduct at the fan outlet. If it is not practical to install astraight section of duct at the fan outlet, the fan speedmay be increased to overcome this pressure loss.(Observe fan RPM limits.)

Air flow low

8. Obstructions in highvelocity air stream

• Obstruction near fan outlet.• Sharp elbows near fan outlet.• Improperly designed or no turning vanes.• Projections, dampers or other obstruction in part of

system where air velocity is high.

1. System • Oversized ductwork.• Access door open.• System not balanced. Resistance less than specified.• Registers or grilles not installed. Dampers set to by-pass

coils.• Filter(s) not in place.

2. Fan • Backward inclined impeller installed backwards(HP willbe high)

• Variable motor sheave not adjusted.• Fan speed too fast.

Air flow high

3. Duct • Duct is too small

1. Filter • Filter(s) is dirtyAir in roomnot fresh

2. Fresh air • Fresh air volume is not adequate.

©2003 McQuay International +1 (800) 432-1342 www.mcquay.com

ISO 9002

REGISTEREDS&E

Documents

McQuay MDM Air Handling Unit - : : Acson International : :€¦ · · 2005-01-14The new series AHU adopt modulus design and have more reasonable structure and more flexible combination