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SERIES I5 SQUARE & RECTANGULAR AIR DIFFUSERS
NODEL UFSurface Mounted Diffuser
Overlap BorderThe Model MF is designed for surface mounting inplaster or other ceiling material where a flat, over-lapping border is required. Other features include
-
o All extruded aluminum constructiono Baked white paint as standard finisho Removable coreo Available in fitteen different pattems. See page 4.o Available with opposed blade volume control or air
extractor, See page 3.
UODEL TBSurface Mounted Diffuser
Bevel BorderThe Model MB offers this multi-pattern diffuser with theadded features of a beveled frame which brings the air dis-charge one inch below the ceiling line.o Light corrosion resistant aluminum constructiono Easily removable, snap-out, multi-pattern coreo Available in fifteen different patterns. See page 4.o Available with air volume and air equalizing control,
see page 3.o Baked white paint as standard finish.
MODEL MS
Surface Mounted DiffuserOverlap Border
The Model MS is another multi-pattern diffuser designedfor surface mounting in plaster o othe ceiling where a f1at,overlapping borde is required. In addition, MS diffuser issuitable for layn installation on inverted T-bar ceilingsystem. Two frames are available to give MS dimensions of23-% x 23-% and 23-% x 23--7 inches to suit ceiling dimen-sions of 24 x 24 and 23-1'a x 23-s/a inches respectively.Unlike MX model diffuser MS fame is partly visible wheninstalled on inverted T-bar ceilins.
CEILING OPENIIG
L
LISTED SIZE + -7/32
SllC , llnl
LISIEO SIZE + 5-lt/t2
],,,"REXOVABLE CORE
MS diffuser has the same features construction, finish,adiustment and accessories as in MF unit.
MODEL MX
Lay-on Tee BarConceal Border
The Model MX is another unit available for tileceiling known as the inverted T-bar, Ex-posed Runner, Lay-in). The MX is fur-nished ions ll3/axll3/e, ll3/+x233/t, ot233/x233/q.
T -
MX has the same features of construction, finish, aJiust-ment and accessories as the MF unit.
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24x24.0f23Tq x 23Vt
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12x240r
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SERIESSOUARE & RECTANGULAR
IUAIR DIFFUSERS
IUODEL IUIPPanel Mounted Diffusers
To fit varying job conditions, the MS diffuser is mountedin a panel to meet ceiling tile dimensions. The panel issuitable for special ceiling adaptations such as sptne,snap-in-tee, Iay-in and othes. Baked white enamel asstandard. The nominal panel sizes are 12 x 12, 12 x 24,24 x 24 and 48 x 24.The actual panel sizes will be adjustedto suit different ceiling system. The table below shows theMS diffuser size suitable for matching with each panel size.The panel can be constructed of aluminium or steel.
TISTED SIZE
MSDiffuser
NeckSize
MPT MPX MPSNOMINAL PANEL SIZE (X)
r2xr2 24Xt2 ?4X24 48X240606 X X X X0906 X X XI ZUti X X XI 506 X X Xtu6 X X X2t06 x Xu9u9 X xI 209 X XI 509 x XI E(]g X X2 109 x xL'l' X XI 512 X XIIZ x X2]7 XI 515 X XI8l5 X X2l l5 )(IEIE X X2l l8 x
'X'denotes MS neck size suitable for each panel size
^
I
PAftELfiDTH
I
II
DA]UlPERThe type BD, opposed blade damper will provide positive air balan-cing and volume control- The manually adjustable damper may beeither duct mounted or snapped onto the diffuser.
AIR EXTRACTORE25 extractors are constructed of pregalvanised steel vanes assem-bled at 25mm centres to provide smooth elt-icient turing of air flowfrom one duct to another. The extactor vanes are gangoperatedand synchro to remain parallel with air flow regardless of theextractors angle. Installed at the take-off on the downstream sidethe air extractors extract, equalize and provide volume control ofai flow into air outlets, reducing air tutning pressure loss andensuring a quieter system operation. Sound levels ol air outlets canbe reduced considerably due to the absence of turbulance in theduct and localised high velocities in the grilles The air extractormay be lurnished with approriate operator for adjustment afterinstallatio.
Type I extractor is furnished with a pushpull arm and type 2extractor with a rvorm gear operato.
AIR FLOW
PATTERN DESIGNAT(R DESCRtPIt0N
Two-way blow. Corner pattern.Major portion of arflow to left(as illustrated).
Three-way blow. Square diffuser.
Three-way blow. Single segmentin drection of short dimenson.
Three-way blow. Sngle segmentin directon of long dimension.Single segment dmension istwce the double segment di-menston.
Three-way blow. Single segmentin direction of long dimension.Single segment dimension sgreater than twice the doublesegment dmenson.
Four-way blow. Square diffuser.
Four-way blow. Rectangulardiffuser.
DESCRIPTI(II
One-way blow. Square diffuser.
One-way blow. Blades parallel tothe short dimension. Airflow per-pendicular to short dimension.
One-way blow. Blades parallel tothe long dimension. Airfl
SELEGTION PROCEDURE ENGINEERING DATA
TABLE 1 REG('ltrlUlENDED ]U|AXIIU|UI5 GFlUlCEILING
HETGHT (Ft.)
NCCR ITER IA DESCR IPII(lN
Select the diffuser pattern from the chart on page4. Selection will depend on the size and shape ofthe space to be conditioned, and on the layout ofair distribution ductwork.For standard style.s and applications, the outletsizes can be selected from the performance andselection charts on pages 6-10.a.) Check recommended limits of capacity (CFM)
from Table l, page 5.b.) Check recommended limits in neck velocity in
relation to sound levels from Table 2, page 5.
30'
B
10
T2
MAX. CFMPER
DIRECTION(Each Diffuser)
COOLINGDIFFERENTIAL
MAXI MU M
20"
25"
SUCGESTE! MA)(IMUM VET()CIil
750
?r F ^ REGOIU|IU|ENDED SC'UND LEYELISrALt' I and NECI( VELOGITIEtS200 cfM
FPM500 ctM
FPM
1
z
c.) Selection of all diflusers supplied by the samebranch duct should be made at approximatelythe same neck velocities in order to facilitatebalancing after installation.
d.) Recheck throw data from pages 6-10, sounddata from page 12 and pressure drop frompage 14 Readjust any sizes which appear outof harmony with the majority.
Neck velocity can be determined from CFM divided byneck area. Diffuser aspect ratio should be based onspace proportions and the throw in each direction.
elow 20 EXREMELY QUIET S0UND STUDIOSSPECIAL LABORATORIES
400 300
25 VERY QUIET CONCERT HALLS 500 45030 FAIRLY QUITT LABORATORIES, THEATRES, i()O
BOARD ROOMSbJU
35 PARTLY QUIEI HOTTL ROOMS, CLASS. 8OO 750ROOMS, PRIVATE OFFICTS
40 PARTLY LOUD 950 900
FIGURE I SELEGTI('N & PERFORMANCE I.WAY BLOW
A
lt
THR|oW Selection in rrost cases shouldthrow figurc indicated above.rcpresent readings taken as
I'i:iJ..i.FJi',,'i"l;J'ri.:l:i.ii'"Jlcorded with thc air travelins at 50 FPM.
be bused on the longerThe two fgures shown
follows: (a) the shorter
FIGURE I SELEGTIO]I & PERFORTA]IGE 2.WAY BLOW
A
A
2t
A
Itr-tIt-ItF-tIF-ItF:-l
A
23
FIGURE 1 SELECTION & PERFORTANGE 2.WAY BLOW
I
A
"+llllB 1ffiN]
24
Selection in ntost cases should be based on the longcrthrow figure indicated above. Thc two figures shownrepresent rcadings taken as follows: (a) the shorter
,f i:iil".J'i'liJii$"1;.",1^,:i':l,ii,i'"J:ocorded with thc air travelins at 50 FPM.
TOT CFM
TOT CFM
CFM SIDE
CFM/SIDE
THROW
FIGURE 1 SELEGTTON & PERFORMANCE 3-WAY BLOW
TOT CFM
CFMi SIDE
TOT CFMCFM SIDE
TOT. CFMCF M,,S I DE
THRO
CFM SIDE
CFM 'SIDE
TOT CFMCFM,, SIDE
THROTOT CFMCFM
'SI DE-IH RO
TOT CFMCFM SIDE
THROTOT CFM
98
5 t0TOT CFM
B
87
7-t3
TOT CFMCFM SIDE
15 t 6.u
FIGURE I SELEGTIOil & PERFORIf,AI{GE 4.WAY BLOW
TOT CFM
CFM SIDE
TOT CFM
TOT CFM
TOT CFM
CFM,'SIDE
TOT CFM
CFM SIDE
CFMiSIDE
CFM i SI DE
12tZl1.75
12 x 212.0
15rl81.875
l8 r 2l2.62
CFM'SIDE
CFM /SIDE
A
I IEIHI- e
41
Selection in nrost cascs should be based on thc longerthrow figure indicatcd above. The tw'o figLrrcs shownrcprcsent readings taken as follows: (a) thc shorter
dinrension represcnts thc distance at which thctraveling at 100 FPM; (b) the grcater throwcordcd with thc air travelins at 50 FPM.
alrIS
THROW
c\
FaoIJJ
Y(JlJz
1000
800
600
FIGURE 2 THROW GHARAGTERISTIGS
60 80 t00 7000 l0 000
TABLE 3
AREAS OFTRIANGLES AND
TRAPEZOTDS(scl. FT.,
TABLE 4
AREAS ('FSQUIRES ANDRECTANGLES
ll
Dmen-sion"X X x Y:3n 4yzn
.031 .O I 6
.o70
.t25 .063
.195
4Y2'Y
7Y2' o94 x.2at t4l L)
LOY2" .383 156 .188L2" 50 25 188 .23413y2" .635 .219 .281L5' .78 r 39 .250 .328 .375r6u 945 2Ar .375 438 .469LA" 113 .563 .313 .422 .50 547L9Y2" 1.32 .344 .469 .563 .625 -6562t" t-f,t 766 .375 516 625 703 75024u 2.OO r.00 438 609 .75 .859 .938 .98427" 2.53 r.27 .500 .703 .875 o2 t13 r20 1.2530" 3.13 1.56 .563 .797 1.OO33" 3.78 r.89 .625 .891 1.13
t7 I3l 1.42 150 1.55?? 1.50 1.64 t75 183 188
36' 45 2.25 688 .984 1.25 48 169 186 200 2.tl 2.r939" 5.2A 2.64 .75 1.O8 r.38 64 188 2.08 2.25 2.39 2.5042" 6.13 3.06 813 t.L7 1.50 80 2.06 2.30 2.50 2.67 z.At
Size 3 6 I 12" 15" 18" 21" 24" 21" 30" 33" 36"6 .1?5 25I 188 375 56
12" 25 50 75 0015" 313 625 ola 25 15618" 375 IJ 1.t25 50 1.875 2.2521" 438 87f l3l 75 219 2.62 30624" 50 100 150 200 250 300 3s0 40027" 563 I 121 169 2.25 281 3.375 394 450 50630" .625 r25 r,875 250 J.TJ 375 4 475 500 ).b25 6.2533" .688 I 37: 2.06 275 344 4.t21 481 550 619 6.87: 7.5636" l5 2.25 00 37s 450 525 6.00 675 750 J 90039" 813 I 621 244 5J 406 487 569 650 73r 8.125 894 9.7542 .875 175 2.625 350 4.375 5.25 6.125 700 7.875 875 9.625 10.50
AREAS (SO. FT.)
s5'bs\}bbs,ffilc40
TIURE 3 SOU]ID DATA
S)UND TEVEL f{C I{DEXTR)M S(UI{D POWER DATALtr-l0db RE 10-12 wATr.DAMPER FUttY f)PEI{
NECI( AREA IN SO. TT,
sfu9
30
25
20
1 000r00 150 200 300 400 500 600 800CFM
Table is based on 4-way. t()R 3-WAY ADf) 2 F()R 2.WAY ADD 2 F()R I-WAY ADt) I
FIGURE 4 TYPIGAL S(,UND P('WER SPEGTRA
CENTER FREQUENCY HZ
NC lndex is a sound ratrngbased on L10'tz!! and usinga 10db reduction in all octave bandsThe resulting room NC value for any application may vary from the NC lndex shown n Fig 3because the room NC value is affected by room absorption and system characieristics.
DB
50Jqt,u=P=
=trv===eEr
IVITH NC FROMFIGURE 3 ABO/E,sour{D P0WER (Llr)CAN BE OBTAINEDFROM FIG. 4 IilANY OF SIX BAIIDSsHolril.
125
I 7f, t- 800
1,,/"
7'v.Loc11
rI-
-
1-t/L / '47 l- /L 7 l I 11
I 600 7 7 I 7 / 4 I 7 / 7 2 7vL L /
ilcll{DEx 40
35
30 1{CINDEX
25
20
40
35
30
25
TABTE 5 AIR DETERTINATIO]I FAGTORS (AK)
SUPPLY AIR AREA FAGTORS (I()
CFM -
AIR DETERMINATI0N FACT0R (Ar)x AVERAGE VELOMETER READINc (FPM)*"Based on average of readings taken from center of each side with Alnor Velometer (2220 A Jet)
-
Using an Alnor Velometer (instrument for measuringair velocity in FPM, manufactured by Illinois TestingLaboratory) equipped with a 2200 A jet sensing tip,take readings in the centers of all active outer passages.To determine delivered CFM, average the readings,multiply by the air balancing factor as shown inTable 5.
l3
MB, MX {ECK AREA MI, MT, MP4w 3w 2w lw SIZE Sq. Ft. 4w 3w tu lw.107 0606 .25 .135 .128 .122 .ll8.r50 06 .375 .186 .180 .t72 .165.206 0612 .50 .240 .232 .22s .218.2r 0615 .625 .288 .282 .272 .2650621 .875 .382 .375 .365 .360
.107 .103
.150 .145
.206 .200
.23 .2t
.113
.160
.212
.25
.236 .218 .218 .220 0909 .56 .26s .257 .250 .240
.30 .28 .25 .25 0912 .75 .33s .328 .320 .313
.38 .36 .33 .34 0915 .938 .41 .396 .390 .385.M .42 .40 .42 0918 r.125 .48 .47 .4s .46.50 .48 .45 .48 0921 r.31 .s5 .54 .53 .53
.41
.50.60.68.t9
.43 .42
.52 .51
.62 .61
.7r .69
.81 .79
.40 .39 .38 .39 t2t2
.46 .M .42 .M l2l5
.58 .58 .54 .56 t2l8
.68 .66 .64 .66 l22l
.75 .73 .71 .7t 1224
.41.50
.60
.68
.7t
1.01.251.5t.752.0
.63 .62 .62
.70 .69 .69
.86 .84 .86
.97 ,95 .98
.58 .5s l5l5
.68 .70 l5l8l52lt524
.60 .59
.72 .70t.56 .64t.875 .722.t9 .882.5 1.0
.84 l8l8 2.25 .91 .88 .86
.92 l82l 2.62 1.05 1.01 .981.00 1824 3.0 Lls 1.15 t.r2.86 .84 .81.95 .92 .901.07 1.01 .98
.891.03I.L7
LlO 1.04 1.00 1.04t.25 l.l8 1.10 t.tz
1.22 ].t7 l.ls 1.201.38 1,33 1.29 1.36
2l2t 3.062124 g.s1.50 1.45 1.40 1.45 2424 4.0 1.58 t.52 1.47 1.55
%s(,)so
20
18
16
14
12
10
08
06
05
04
03
300
NECK VEL()CITY IN FPM
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02
200
For types MB and MX, use 1.20 multiplier for Pt
500 600 800
Type MF, MB, MX, MS Diffusers Type MP Panel Diffusers
SIZE: XXXX (MS Diffuser Size)
CORE PATTERN: XX (See Page +)
SIZE:
CORE PATTERN:
MODEL:
BORDER:
XXXX
XX (See Page +)
M
F-OverlapX-Lay- I nT-Snap- I nS-SplineB-Bevel
BD- Damper825-1 Extractor with push-pull armE25-3 Extractor with wormgear operatorlE25-2 with external opera-tor is not suitable for seriesM diffusers)FL-Fusible link(use only with BD)
MODEL:
BORDER:
PANEL SIZE:
ACCESSOR I ES:
MP
X-Lay-l nT-Tile SizeS-Soline
XXXX (See Page 3)
BD- DamperE25-1 Extractor with push-pull arm825-3 Extractor with wormgear operator(E25-2 with external opera-tor is not suitable for seriesM diffusers)FL-Fusible link(use only with BD)
ACCESSOR IES:
Note: E25 will be shipped loose for f ield installation
EXAMPLE : O91 212-MF-E25
Note: MP Panel Diffuser consistsmounted in panelE25 will be shipped loose for field
of MS Diffuser
instailation
EXAMPLE: 1 21 542-MPX- 2424-BD
Connols-Air, Singapore (the "Company"), warrantsthat every product manufactured and sold by them anddescribed herein will be free from defects in material andworkmanship under normal use and service for a periodof one year after purchase. The Company's obligationunder this warranty shall be limited to replacing any suchproduct which proves to be defective in workmanship ormaterial under normal use and service within such period.Any improper use, including but not limited to, sub-stitution of parts not approved by the Company, neglect,accident or any alteration or repair by others in such amanner as in the Company's opinion materially and ad-versely affects the products, shall void this Warranty.
No person is authorized to assume for the Company any
other liability with respect to any product sold by theCompany, nor is any employee or representative authorizedto alter this warranty in any way or grant any other war-ranty, unless such change is authorized in writing by anofficer of the Company at its home office. The Companyshall have no liability whatsoever in any event for paymentof incidental or consequential damages, including withoutlimitation, installation or delay costs or damages for injuryto persons or property. Every claim under this warrantyshall be deemed waived unless submitted in writing, andreceived by the Company within thrty (30) days of thedate to which each claim relates, is discovered or shouldhave been discovered.
l5
AIR PATTERN TEST OF M SERIESDIFFUSER AT OUR IN-HOUSEAIR DISTRIBUTION LABORATORY
TESTS SHOW M SERIES DIFFUSERDOES NOT EXHIBIT AIR DUMPINGTO NECK VELOCITY OF 150 FTIMIN
cNNoLs-A (s) PfE LTD3-B Joo Koon CircleSingapore 629034Tel : (65) 6861 5253Fax: (65) 6861 9850E m ail : e nq u i ry@connols-ai r. co mWe bsite : http ://www. co n no ls-ai r. com
LEditionl Printed on March 1992