PRODUCT BROCHURE - Smartair Diffusion · PRODUCT BROCHURE LMC-AD : 102018 ... Intense mixing at the diffuser discharge face produces high induction that strongly dilutes the supply

smartemp.com

®

PRODUCT BROCHURE

LMC-AD : 102018

LMC-ADLinear Multistream Ceiling Di�user

LMC-AD : 102018

The SMARTEMP® Linear Multistream Ceiling Diffuser,

type LMC-AD (figure 1), is a multi-nozzle linear slot

diffuser with adjustable discharge direction that can be

flush mounted in a ceiling or freely suspended (ie no

Coanda attachment to the ceiling required).

The diffuser's 1-to-6 linear slots house a plurality of

barrel nozzles, each with an adjustable guide vane,

delivering highly inductive discharge by breaking the

supply air stream up into a multitude of alternating air jets.

Each barrel nozzle is made of black polycarbonate

located between linear aluminium extrusions that are

anodised or powder coated. Each guide vane is readily

adjustable to any one of five discharge patterns (figure 2

- three 2-way blow examples shown) to change the

discharge angle from horizontal through diagonal to

vertical (figures 3 & 4). Two-way discharge is standard

(figures 3 & 4); one-way discharge is available as an

option (figure 5).

Intense mixing at the diffuser discharge face produces

high induction that strongly dilutes the supply air stream

with large quantities of room air. Rapid temperature

equalisation of the supply air stream with room air

occurs, preventing cold air dumping, thereby ensuring

uniform temperature distribution (no cold and draughty

or hot and stagnant spots) and high comfort levels in the

space. Heating performance is also improved.

The stable discharge characteristics of the diffuser over a

wide range of supply air temperatures and volume flow

rates make the LMC-AD suitable both for constant flow

and VAV systems, including low temperature air supply.

Linear Multistream Ceiling Di�user 1

LMC-AD

Slots

1

2

3

4

5

6

*Max based on 35 Pa Pt max (including side-entry connection box).

Volume flow rate*

∆T = -16 K ∆T = -12 K ∆T = -8 K 9-36 8-36 6-36

19-75 16-75 13-75

29-116 25-116 21-116

38-150 33-150 27-150

47-188 41-188 33-188

57-228 49-228 40-228

V [L/s/m] V [L/s/m] V [L/s/m]

V

DESCRIPTION

1 - Plenum Box

2 - Supply Air Diffuser

3 - Return Air Diffuser

4 - Expansion Bracket

5 - Joining Strip

6 - Corner piece

7 - End Flange1

2

3

4

5

6

7

Figure 1

Figure 6

Figure 3

Figure 5

Figure 4

CONSTRUCTION

Figure 2

DISCHARGE DIRECTION EXAMPLESWITH 2-WAY PATTERN

LMC-AD : 102018


Direction A Direction C Direction E

*Check with local supplier. All clear air dimensions. If insulated, then external dimensions need to be increased accordingly.

Number of Slots (n) 131

48

27

81

149

149

259

76

55

109

224

224

387

104

83

137

249

249

4115

132

111

165

299

299

n28 • n+3

28 • n+20

28 • n-1

Wn+50

<3.6m/s

<3.6m/s

Width flangeless face Wn [mm]Width flanged face Wf [mm]

Width of diffuser throat Wt [mm]

Recommended internal plenum height A [mm]*Recommended internal plenum width B [mm]*

Recommended spigot dimension D [mm]* up to 1200 mm length

DIMENSIONS

LMC-AD : 102018


Recommended spigot dimension D [mm]* up to 1500 mm length

5143

160

139

193

299

314

6171

188

167

221

314

354

Standard neck lengths: 1050, 1200, 1350, 1500 mm. Other lengths on request.Neck length (including screw heads) increases by 3.0 mm per end flange.

INSTALLATION WITHEXPANSION BRACKET

AD

B

45

Wt

INSTALLATION WITHCONNECTION BOX

30

40

25

Wf

Wn

Wt

n = 4

Wf

Wn Wn

Wf

Wt Wt

n = 1 n = 2

46

46

D+76

16FLANGE

TECHNICAL DATA

Products supplied may differ slightly from those described in this technical brochure due to on-going product development.

LMC-AD : 102018


NO

TES

TO N

OM

OG

RA

M O

N P

AG

E 6

Com

men

ts /

Nom

ogra

mva

lid f

or:

Adj

ustm

ents

:

Hea

ting

valid

for

100%

hig

h-le

vel

retu

rn.

For

low

-leve

l re

turn

:∆T

max

.hea

ting

≈ (1

+ (L

RA

%)/1

00) •

∆Tm

ax, w

here

LR

A%

= %

low

-leve

l re

turn

.

Val

idfo

rdi

scha

rge

from

clo

sed

ceili

ng.

For

freel

y su

spen

ded

diffu

ser:

Hea

ting

∆Tm

ax.f

reely

sus

pend

ed≈

∆Tm

ax.h

eatin

g/ 2

Rec

omm

ende

d A

ir P

atte

rnS

ettin

gs:

For

H =

2 to

2.7

m:

A: 0

° to

-15°

dis

char

ge t

o th

e ho

rizon

tal.

For

H =

2.7

to 3

m:

B:0

° to

-30°

dis

char

ge t

o th

e ho

rizon

tal.

For

H =

3to

4m

: C

: ≈-4

5° d

isch

arge

to

the

horiz

onta

l.

For

H =

4 to

5 m

: D

: ≈ -6

0° d

isch

arge

to

the

horiz

onta

l.

Tota

l pre

ssur

e (P

t) is

incl

usive

of s

ide-

entry

con

nect

ion

box

pres

sure

loss

.

Dra

w a

line

verti

cally

dow

nth

e no

mog

ram

for

2-w

ay b

low

, or

cor

rect

for

1-w

ay b

low

.

For

heig

ht ≤

2.7

m s

elec

t 2.7

;oth

erw

ise

sele

ct h

eigh

t tw

ice

(onc

e in

the

grey

zon

e; o

nce

in th

e w

hite

zone

).

Cm

inis

eith

er t

he m

inim

um s

paci

ngbe

twee

n tw

o 2-

way

blo

w d

iffus

er r

ows

(hal

ve t

his

valu

e fo

r th

row

to w

alls

/ g

lazi

ng)

or t

he m

inim

um t

hrow

of a

1-w

ay

blow

diff

user

row

.

Cm

axis

eith

er t

he m

axim

um s

paci

ngbe

twee

n tw

o 2-

way

blo

wdi

ffuse

r ro

ws

(hal

ve t

his

valu

e fo

r th

row

to

wal

ls /

gla

zing

) or

the

max

imum

thr

ow o

f a 1

-w

ay b

low

diff

user

row

.A

ctive

Len

gth

Rat

io (

RLA

) is

the

ratio

of t

he a

ctive

len

gth

LAre

lativ

e to

the

room

leng

th L

. D

eter

min

e C

max

twic

e(o

nce

for

cool

ing

∆T;

once

for

disc

harg

e he

ight

)th

en s

elec

t the

low

erof

the

two

outp

uts.

Sel

ect d

esire

d co

mfo

rt le

vel

to d

eter

min

e m

inim

uman

d m

axim

um s

paci

ng o

r th

row

(C

min

& C

max

) and

min

imum

dis

char

ge h

eigh

t (H

min).

Hm

info

r di

scha

rge

from

clos

ed c

eilin

g.Fo

r fre

ely

susp

ende

d di

ffuse

r:H

min

.fre

ely s

uspe

nded

≈H

min•

1.1

Sou

nd p

ress

ure

leve

l LP

[NC

/m] i

s va

lid i

na

stan

dard

com

mer

cial

offi

ce o

nly

with

2.7

m to

3m

cei

ling.

2 9 5 7 6 8 3 4

0 to

-15°

0 to

-30°

≈ -4

5°

≈ -6

0°

Ther

mal

Com

fort

Gui

de:

ADPI

≥ 9

5%:

Prem

ium

com

fort

sed

enta

ry a

ctiv

ity, s

uch

as in

aud

itoria

.AD

PI ≥

90%

: H

igh

com

fort

nea

r-sed

enta

ry a

ctiv

ity, s

uch

as in

boa

rd ro

oms,

hig

h en

d of

fices

and

libr

arie

s.AD

PI ≥

80%

: G

ood

com

fort

nea

r-sed

enta

ry a

ctiv

ity, s

uch

as in

ope

n-pl

an o

ffice

s an

d m

eetin

g ro

oms.

ADPI

≥ 7

0%:

Stan

dard

com

fort

med

ium

act

ivity

, suc

h as

in tr

ansi

ent s

pace

s, re

tail

and

lobb

ies.

LMC-AD : 102018


Layo

ut R

ecom

men

datio

ns:

≤ C/

8

≤ C/

8

C C/

2 C/

2

L

2-w

2-w

1-w

≤ C/

4

2-w

2-w

L A.1

Refe

r to

nom

ogra

ms f

or p

erfo

rman

ce d

ata.

Not

es:

• Sp

acin

g:

C min

≤ C

≤ C

max

C wal

ls = C

/2

• Ac

�ve

Leng

th R

a�o:

R LA =

LA /

L, w

here

L A ≥

0.1

• L

, and

L A =

Σ L

A.i

• Ai

r Pa�

ern:

2-w

: 2-w

ay b

low

1-w

: 1-w

ay b

low

L A.2

≤ C/

8

≤ C/

8

L ≤

C/4

L A.1

L A.2

C

1-w

1-w

1-w

LMC-AD : 102018


REF

ER T

O N

OTE

S O

N P

AG

E 4

Not

es:

* Ba

sed

on 1

0 dB

room

abs

orp�

on.

1 Ai

r Dir

ec�o

n (fo

r hea

�ng)

: A ≈

0 to

-15°

; B ≈

0 to

-30°

; C ≈

-45°

; D ≈

-60°

Cool

ing

∆T [K

]

10

H =

2

5 m

15

30

ADPI

≥ 9

5%; ṽ

≤ 0

.20

m/s

; DR

≈ 20

% @

T=2

3°C:

20

H min

[m]

20

10

20

0.8

2

10

1

10

33

240 30

40

50

60

70

80

90

10

0

120

140

160

180

200

220

L W

L P*

L/s/

m

1 0.

6

-16

K

-12

K

-8 K

C max

[m]

2.

3

0.5

1 10

800

600

500

400

300

200

100

700 40

m3 /h

/m

24

40

50

9 25

35

Soun

d Po

wer

, LW

[dB(

A)/m

] So

und

Pres

sure

, LP [

NC/

m]*

2.4

2.2

2.1

LMC-

AD

20

10

ADPI

≥ 9

0%; ṽ

≤ 0

.25

m/s

; DR

≈ 20

% @

T=2

6°C:

ADPI

≥ 8

0%; ṽ

≤ 0

.29

m/s

; DR

≈ 30

% @

T=2

4°C:

ADPI

≥ 7

0%; ṽ

≤ 0

.33

m/s

; DR

≈ 30

% @

T=2

6°C:

5 4 2 3 1 6

Slot

s 6 5 4 2 1

+20

K

+16

K

+12

K

+8 K

+4 K

0 K

Hea�

ng

∆Tm

ax [

K]

[dB(

A)/m

] [N

C/m

] [P

a]

0.2

1

0.5

12

-8 K

-1

2 K

1 1 18

-16

K

5

5 10

5

C min

Tota

l Pre

ssur

e, P

t [Pa

]

10

5 1

5 4 3 2 1

[m]

0.3

13

10

10

60

30

40 5

0 27

5 3

m

4 m

5 m

2.7

m

H

= 2

m

3

P t

Cool

ing

1 2

4 9

3

Cool

ing

∆T =

6 20

30

0.8

2 20

30

30 40

≤2.7

H

[m] =

5

6 7

5

R LA =

0.1

0.

5 1.

0

2.6

2.4

2.3

2.7 2.8

2.6

2.5

2.9

3.0

2.8

2.7

≤2

5 ≥1

0

+1

L/s/

m2

A C D

2-w

1-w

2.65

Air P

a�er

n (2

-way

/1-w

ay)

2

25

3 4

35

2 0.

7 1

2.5

15

67

8

30

20

+18

K

+14

K

+10

K

+6 K

+2 K

B

Air D

irec�

on1

Quic

k se

lect

ion

guid

e. R

efer

to th

e on

line

sele

ctio

n to

ol fo

r det

aile

d se

lect

ions

.

LMC-AD : 102018


EXAM

PLE:

LM

C-A

D-2

.1

Det

erm

ine

perfo

rman

ce p

aram

eter

s fo

r a ro

w o

fLM

C-A

D-2

.1(tw

o-sl

ot; o

ne-w

ay b

low

) ope

ratin

g at

67

L/s,

free

ly su

spen

ded

at 5

mhe

ight

,su

pplyi

ngap

prox

imat

ely

2L/

s/m

2to

a lib

rary

.Th

e su

m o

f the

diff

user

leng

ths

span

s 30

% o

f the

libr

ary

leng

th.

The

supp

ly-to

-room

tem

pera

ture

di

ffere

ntia

l whe

n co

olin

g is

-16

K.10

0% re

turn

air

is fr

om a

low

leve

l.

Sele

ct a

dou

ble

slot

(Slo

ts2)

.

5 m

dis

char

ge h

eigh

t req

uire

s th

e di

ffuse

r air

patte

rn to

be

set t

o D

(≈ -6

0° fr

om th

e ho

ri zon

tal).

Sele

ct ≤

2 L

/s/m

2sp

ecific

airf

low

, whi

chgi

ves

a m

axim

um h

eatin

g te

mpe

ratu

re d

iffer

entia

l (∆T

max

) of +

1 K,

valid

for d

isch

arge

from

a

clos

ed c

eilin

g an

d 10

0% h

igh-

leve

l ret

urn.

Fo

r 100

% lo

w-le

vel r

etur

n, ∆

T max

.hea

ting

≈ (1

+ (L

RA%

)/100

) x ∆

Tmax

≈ (1

+ (1

00/1

00))•

1 K

≈ +2

K.

As th

e di

ffuse

r is

freel

y-su

spen

ded,

∆T m

ax.f

reel

y su

spen

ded≈

∆Tm

ax.h

eatin

g/ 2

≈ +

1K.

(Thi

s is

not

suf

ficie

nt fo

r hea

ting.

Con

side

r usi

ng th

e Sm

arte

mp

HSC

-AD

if h

eatin

g is

requ

ired.

)

The

tota

l pre

ssur

e (P

t)is

27

Pa, i

nclu

sive

of s

ide-

entry

con

nect

ion

box

pres

sure

loss

.

To d

eter

min

e la

yout

reco

mm

enda

tions

in c

oolin

g m

ode,

sel

ect 1

-w (o

ne-w

ay b

low

)air

patte

rn.

Sele

ct 5

m d

isch

arge

hei

ght t

wic

e(o

nce

in th

e gr

ey z

one;

onc

e in

the

whi

te z

one)

.

Sele

ct -1

6K

cool

ing.

Sele

ct R

LA=

0.3

(ie 3

0% a

ctive

leng

th ra

tiofo

r30%

diff

user

spa

n ac

ross

the

libra

ryle

ngth

).Se

lect

-16

K co

olin

g an

d5

m d

isch

arge

hei

ght.

For a

libra

ry, s

elec

t AD

PI =

90%

. C

min

betw

een

two

diffu

ser r

ows

is 1

2m

(6 m

to w

alls

). H

min

free

ly s

uspe

nded

≈ Hm

in•

1.1

≈ 2.

65 •

1.1

≈ 2.

9m

.C

max

betw

een

two

diffu

ser r

ows

is 1

5m

(ie

the

low

er o

f 15

m fo

r -16

K c

oolin

g an

d 30

mfo

r5m

dis

char

ge h

eigh

t) or

7.5

m to

wal

ls.

The

A-w

eigh

ted

soun

d po

wer

leve

l (LW

) of t

he d

iffus

er is

33

dB(A

).As

this

is a

larg

e vo

lum

e lib

rary

(and

not

a 2

.7 to

3 m

cei

ling

heig

ht

offic

e) th

e so

und

pres

sure

leve

l (LP

) sho

uld

notb

e us

ed (i

e on

ly LW

shou

ld b

e us

edfo

r aco

ustic

al c

alcu

latio

ns).

1 2 3 4 5 6 7 8 9

ORDER DETAILS

LMC-___-____-__.___-S__-E__-___-___-___

PROFILE COLOUR:- RAL9003* (signal white).- RAL9005 (matte black).- RAL________(RAL colour of choice).

ACCESSORIES:- 0* - Diffuser only.- Kt - With uninsulated connection box clipped to diffuser throat.- Kn - With uninsulated connection box screwed to into diffuser neck.- KIt - With internally insulated connection box clipped to diffuser throat.- KIn - With internally insulated connection box screwed into diffuser neck.

SIDE PROFILE:- F* - With side flanges.- N - Flangeless.

FIXING :- 0* - Without accessories / by others.- EX - Expansion bracket.

AIR PATTERN & DIRECTION:- 2A* - 2-way horizontal, position A (0 to -15°).- 1A - 1-way horizontal, position A (0 to -15°).- 2B - 2-way horizontal, position B (0 to -30°).- 1B - 1-way horizontal, position B (0 to -30°).- 2C - 2-way diagonal, position C (≈ -45°).- 1C - 1-way diagonal, position C (≈ -45°).- 2D - 2-way vertical, position D (≈ -60°).- 1D - 1-way vertical, position D (≈ -60°).- 2E - 2-way vertical, position E (vertical).- 1E - 1-way vertical, position E (vertical).

DIFFUSER ENDS:- 0 - Without end flanges.- J - Without end flanges + 1 pair of joining strips.- 1 - 1 End flange + 1 pair of joining strips.- 2* - 2 End flanges.

NOMINAL LENGTH:- N1200 - neck length = 1200 mm.- F1195* - face length = 1195 mm.- F_____ - custom face length ≤ 1500 mm.

MODEL:- Linear Multistream Ceiling

NUMBER OF SLOTS:- 1, 2, 3, 4, 5, 6.- Other slots available on request.

Note: * Standard, if no type code entered

LMC-AD : 102018


Products supplied may differ slightly from those described in thistechnical brochure due to on-going product development.

SUPPLY/RETURN:- AD* = Adjustable Direction- RA = Return Air

®

For additional information, please contact [email protected]

We strive to continually improve SMARTEMP products. Brochures and marketing material are subject to change without notice,

Applicable Patents and Trade Marks can be viewed at smartemp.com/patents

® SMARTEMP is a registered trade mark. © 2019.

Documents

PRODUCT BROCHURE - Smartair Diffusion · PRODUCT BROCHURE LMC-AD : 102018 ... Intense mixing at the diffuser discharge face produces high induction that strongly dilutes the supply