Lennox CHA16-024 User manual

Page 1  2001 Lennox Industries Inc.
Litho U.S.A.
Corp. 0109-L2
Service Literature
CHA/CHP16
CHP20
2 to 5 ton (7.0 to 17.6 kW)
CHA/CHP16, CHP20 SERIES UNITS
CHA/CHP16 and CHP20 series units in the 2 throu h 5 ton
(7.0 throu h 17.6 kW) sizes are desi ned for outdoor roofĆ
top or round level installations in li ht commercial applicaĆ
tions. Electric heat is available in several kW sizes. Models
are available in sin le or three phase power supply and can
be utilized in downflow or horizontal supply and return air.
CHA/CHP16-024/030 model units are equipped with a
reciprocatin compressor. CHA/CHP16-036/060 and
CHP20-024/060 model units are equipped with scroll
compressors. The scroll compressor offers hi h voluĆ
metric efficiency, quiet operation and the ability to start
under system load. Continuous flank contact, mainĆ
tained by centrifu al force, minimizes as leaka e and
maximizes efficiency. The motor is internally protected
from excessive current and temperature.
CHA/CHP16 and CHP20 model units are desi ned to acĆ
cept any of several different thermostat control systems
with minimum field wirin . Control options such as econĆ
omizer, warm up kit, Honeywell T7300 thermostat or
Honeywell T8600/T8611/T8621 thermostat controls
connect to the unit with jackĆplu s. When plu ed in the
controls become an inte ral part of the unit wirin . Low
volta e thermostat connections facilitate thermostat
field wirin .
Optional electric heat is field installed. Electric heat operĆ
ates in sin le or multiple sta es dependin on the kW size.
5kW throu h 25 kW sizes are available for the CHA/CHP16
and CHP20 units.
Information in this manual is for use by a qualified service
technicial only. All specifications in this manual are subject
to chan e. Procedures outlined in this manual are repesĆ
ented as a recommendation only and do not supersede or
replace state or local codes.
IMPORTANT
Im ro er installation, adjustment, alteration, service
or maintenance can cause ro erty damage, ersonĆ
al injury or loss of life. Installation and service must
be erformed by a qualified installer, service agency
or the gas su lier.
WARNING
Electric shock hazard. Can cause injury
or death. Before attem ting to erform
any service or maintenance, turn the
electrical ower to unit OFF at disconĆ
nect switch(es). Unit may have multi le
ower su lies.
WARNING
Refrigerant can be harmful if it is inhaled. Refrigerant
must be used and recovered res onsibly.
Failure to follow this warning may result in ersonal
injury or death.

Pa e 2
TABLE OF CONTENTS
GENERAL 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS CHA16 3. . . . . . . . . . . . . . . . . .
SPECIFICATIONS CHP16 4. . . . . . . . . . . . . . . . .
SPECIFICATIONS CHP20 5. . . . . . . . . . . . . . . . . .
OPTIONAL ACCESSORIES CHA/CHP16 6. . . .
OPTIONAL ACCESSORIES CHP20 7. . . . . . . . .
ELECTRICAL DATA CHA16 8. . . . . . . . . . . . . . . .
ELECTRICAL DATA CHP16/20 9. . . . . . . . . . . . .
BLOWER DATA CHA16 10. . . . . . . . . . . . . . . . . . . .
BLOWER DATA CHP16/20 13. . . . . . . . . . . . . . . . .
ACCESSORIES BLOWER DATA 16. . . . . . . . . . . .
I APPLICATION 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
II UNIT COMPONENETS 18. . . . . . . . . . . . . . . . . . . . . .
Control Box 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolin Components 22. . . . . . . . . . . . . . . . . . . . . . .
Condenser Fan and Indoor Blower 27. . . . . . . . . . .
III OPTIONAL ELECTRIC HEAT 28. . . . . . . . . . . . . . . .
IV PLACEMENT AND INSTALLATION 43. . . . . . . . . . .
V ELECTRICAL CONNECTIONS 43. . . . . . . . . . . . . . .
VI START UP 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VII COOLING SYSTEM SERVICE CHECKS 43. . . . . .
VIII HEATING SYSTEM SERVICE CHECKS 44. . . . . .
IX INDOOR BLOWER OPERATION 44. . . . . . . . . . . . .
X MAINTENANCE 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
XI ACCESSORIES 46. . . . . . . . . . . . . . . . . . . . . . . . . . . .
XII WIRING AND OPERATION SEQUENCE 52. . . . . .
CAUTION
Electrostatic discharge can affect electronic
com onents. Take recautions during unit
installation and service to rotect the unit's elecĆ
tronic controls. Precautions will hel to avoid
control ex osure to electrostatic discharge by
utting the unit , the control and the technician at
the same electrostatic otential. Neutralize elecĆ
trostatic charge by touching hand and all tools on
an un ainted unit surface, such as the blower
deck, before erforming any service rocedure.
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures

Pa e 3
SPECIFICATIONS CHA16
Model No. CHA16Ć024 CHA16Ć030 CHA16-036 CHA16-048 CHA16-060
Nominal Tonna e 2 2-1/2 3 4 5
Coolin capacity - Btuh (kW) 22,200 (6.5) 27,600 (8.1) 35,200 (10.3) 45,000 (13.2) 57,000 (16.5)
LARI
Certified Total unit watts 2550 3210 4045 4890 6065
Certified
Coolin
Ratin
sSEER (Btuh/Watts) 10.0 10.25
Ratin s
EER (Btuh/Watts) 8.7 8.6 8.7 9.2 9.4
*Sound Ratin Number (db) 80 82
Refri erant Char e (HCFC-22) 3 lbs. 3 oz.
(1.45 k )
4 lbs. 6 ozs.
(1.98 k )
4 lbs. 13 ozs.
(2.18 k )
5 lbs. 8 oz.
(2.49 k )
7 lbs. 7 oz.
(3.37 k )
Evaporator
Blower
Blower wheel nominal
diameter x width in. (mm)
9 x 8
(229 x 203) 10 x 7 (254 x 178) 10 x 8 (254 x 203)
11-1/2 x 9
(292 x 229)
Blower
Motor horsepower (W) 1/3 (249) 1/2 (373) 3/4 (560)
Net face area - ft.2 (m2)3.2 (0.30) 4.1 (0.38) 5.8 (0.54)
Evaporator
Coil Tube diameter - in. (mm) & No. of rows 3/8 (9.5) - 2
Coil
Fins per inch (m) 15 (591) 17 (669) 15 (591)
Net face area Outer coil 8.6 (0.80) 14.3 (1.33)
Condenser
Net
face
area
ft.2 (m2)Inner coil - - - - 8.4 (0.78) 5.9 (0.55) 13.8 (1.28)
Condenser
Coil Tube diameter - in. (mm) & No. of rows 3/8 (9.5) - 1 3/8 (9.5) - 2 3/8 (9.5) - 1.4 3/8 (9.5) - 2
Fins per inch (m) 20 (787)
Diameter - in. (mm) & No. of blades 20 (508) - 4 24 (610) - 4
Condenser Air volume - cfm (L/s) 2400 (1135) 2200 (1040) 4000 (1890) 3600 (1700)
Condenser
Fan Motor horsepower (W) 1/6 (124) 1/4 (187)
Motor watts 230 220 340 330
Condensate drain size mpt - in. (mm) 3/4 (19)
No. & size of cleanable polyurethane filters - in. (mm) (1) 16 x 25 x 1 (406 x 635 x 25) (1) 20 x 25 x 1 (508 x 635 x 25)
Net wei ht of basic unit - lbs. (k ) 300 (136) 331 (150) 320 (145) 438 (199) 473 (215)
Shippin wei ht of basic unit - lbs. (k ) 1 packa e 385 (175) 413 (187) 407 (185) 547 (248) 582 (264)
Electrical characteristics - (60hz) 208/230v - 1 phase 208/230v - 1 ph, 208/230v, 460v or 575v - 3 ph
ECH16R-5 Output - Btuh (kW) 19,000 (5.6) - - - -
ECH16R
-
5
ECH16-5 lA.F.U.E. 99.0% - - - -
ECH16R-7 Output - Btuh (kW) 26,000 (7.6) 27,000 (7.9) 26,000 (7.6) 27,000 (7.9)
ECH16R
-
7
ECH16-7 lA.F.U.E. 99.0%
ECH16R-10 Output - Btuh (kW) 36,000 (10.5) 37,000 (10.8) 36,000 (10.5) 37,000 (10.8)
Optional
Electric
ECH16R
-
10
ECH16-10 lA.F.U.E. 99.0%
Electric
Heat
Ratin
s
ECH16 15
Output - Btuh (kW) 53,000 (15.5) 54,000 (15.8) 53,000 (15.5) 54,000 (15.8)
Ratin s
ECH16-15
lA.F.U.E. 99.0%
ECH16 20
Output - Btuh (kW) - - - - 70,000 (20.5) 71,000 (20.8)
ECH16-20
lA.F.U.E. - - - - 99.0%
ECH16 25
Output - Btuh (kW) - - - - 88,000 (25.8)
ECH16-25
lA.F.U.E. - - - - 99.0%
*Sound Ratin Number in accordance with test conditions included in ARI Standard 270.
LRated in accordance with ARI Standard 210/240 and DOE 95_F (35_F) outdoor air temperature and 80_F (27_C) db/67_F (19_C) wb enterin evaporator coil air.
lAnnual Fuel Utilization Efficiency based on DOE test procedures and FTC labelin re ulations.

Pa e 4
SPECIFICATIONS CHP16
Model No. CHP16Ć024 CHP16Ć030 CHP16-036 CHP16-048 CHP16-060
Nominal Tonna e 2 2-1/2 3 4 5
Coolin capacity - Btuh (kW) 23,800 (7.0) 29,000 (8.5) 34,600 (10.1) 46,500 (13.6) 55,000 (16.1)
LARI
Coolin
Total unit watts 2615 3185 3870 4915 6225
C
oolin
Ratin s SEER (Btuh/Watts) 10.0
Ratin s
EER (Btuh/Watts) 9.1 8.6 9.5 8.8
LARI Hi h
Total capacity - Btuh (kW) 23,800 (7.0) 29,400 (8.6) 35,800 (10.5) 49,500 (14.5) 57,500 (16.8)
LARI Hi h
Tem
p
erature Total unit watts 2235 2780 3430 4605 5765
Temperature
Heatin
Ratin s
C.O.P. (Coefficient of Performance) 3.12 3.10 3.06 3.14 2.94
R
a
ti
n s
HSPF - Re ion IV (Re ion V) 6.6 (5.9)
LARI Low
Total capacity - Btuh (kW) 12,800 (3.7) 17,000 (5.0) 22,800 (6.7) 28,000 (8.2) 33,600 (9.8)
LARI
L
ow
Temperature
Hti Rti
Total unit watts 1855 2330 3182 3800 5045
p
Heatin Ratin s C.O.P. (Coefficient of Performance) 2.02 2.14 2.10 2.16 1.98
*Sound Ratin Number (db) 80 82
Refri erant Char e (HCFC-22) 5 lbs. 10 oz.
(2.55 k )
6 lbs. 0 oz.
(2.72 k )
7 lbs. 0 oz..
(3.18 k )
10 lbs. 12 oz.
(4.88 k )
10 lbs. 5 oz.
(4.68 k )
Indoor Coil
Blower
Blower wheel nominal diameter x width in. (mm) 9 x 8
(229 x 203) 10 x 7 (254 x 178) 10 x 8 (254 x 203)
11-1/2 x 8
(292 x 203)
Blower Motor horsepower (W) 1/3 (249) 1/2 (373) 3/4 (560)
Id
Net face area - sq. ft. (m2)3.2 (0.30) 4.1 (0.38) 5.8 (0.54)
Indoor
Coil Tube diameter - in. (mm) & No. of rows 3/8 (9.5) - 3
Coil
Fins per inch (m) 15 (591)
Net face area Outer coil 8.6 (0.80) 14.3 (1.33)
Outdoor
Net
face
area
sq. ft. (m2)Inner coil 5.3 (0.49) 8.3 (0.77) 9.9 (0.92) 13.8 (1.28)
Outdoor
Coil Tube diameter - in. (mm) & No. of rows 3/8 (9.5) - 1.6 3/8 (9.5) - 2
Fins per inch (m) 20 (787)
Diameter - in. (mm) & No. of blades 20 (508) - 4 24 (610) - 4
Outdoor
Coil
Air volume - cfm (L/s) 2350 (1110) 2200 (1040) 3600 (1700)
C
oil
Fan Motor horsepower (W) 1/6 (124) 1/4 (187)
Fan
Motor watts 220 340
Condensate drain size mpt - in. (mm) 3/4 (19)
No. & size of cleanable polyurethane filters - in. (mm) (1) 16 x 25 x 1 (406 x 635 x 25) ( 1) 20 x 25 x 1 (508 x 635 x 25)
Net wei ht of basic unit - lbs. (k ) 332 (151) 340 (154) 354 (161) 535 (243)
Shippin wei ht of basic unit - lbs. (k ) 1 packa e 417 (187) 426 (193) 436 (198) 610 (277)
Electrical characteristics - (60hz) 208/230v - 1 phase 208/230v - 1 ph, 208/230v or 460v - 3 ph
ECH16R-5 Output - Btuh (kW) 19,000 (5.6) - - - -
ECH16R-5
ECH16-5 lA.F.U.E. 99.0% - - - -
ECH16R-7 Output - Btuh (kW) 26,000 (7.6) 27,000 (7.9) 26,000 (7.6) 27,000 (7.9)
ECH16R-7
ECH16-7 lA.F.U.E. 99.0%
Optional
ECH16R-10 Output - Btuh (kW) 36,000 (10.5) 37,000 (10.8) 36,000 (10.5) 37,000 (10.8)
Optional
Electric
ECH16R-10
ECH16-10 lA.F.U.E. 99.0%
Electric
Heat
Ratin s
ECH16 15
Output - Btuh (kW) 53,000 (15.5) 54,000 (15.8) 53,000 (15.5) 54,000 (15.8)
R
a
ti
n s ECH16-15 lA.F.U.E. 99.0%
ECH16 20
Output - Btuh (kW) - - - - 70,000 (20.5) 71,000 (20.8)
ECH16-20 lA.F.U.E. - - - - 99.0%
ECH16 25
Output - Btuh (kW) - - - - 88,000 (25.7)
ECH16-25 lA.F.U.E. - - - - 99.0%
*Sound Ratin Number in accordance with test conditions included in ARI Standard 270.
LRated in accordance with ARI Standard 210/240;
Cooling Ratings - 95_F (35_F) outdoor air temperature and 80_F (27_C) db/67_F (19_C) wb enterin indoor coil air
High Tem erature Heating Ratings - 47 _F (8_C) db/43_F (6_C) wb outdoor air temperature and 70_F (21_C) enterin indoor coil air
Low Tem erature Heating Ratings - 17_F (-8_C) db/15_F (-9_C) wb outdoor air temperature and 70_F (21_C) enterin indoor coil air.

Pa e 5
SPECIFICATIONS CHP20
Model No. CHP20Ć024 CHP20Ć030 CHP20Ć036 CHP20Ć042 CHP20Ć048 CHP20Ć060
Nominal Tonna e 22-1/2 33-1/2 4 5
Coolin Capacity Ċ Btuh (kW) 24,000 (7.0) 30,200 (8.8) 33,600 (9.8) 43,000 (12.6) 46,500 (13.6) 59,000 (17.3)
LARI
Coolin
Total unit watts 2555 3145 3535 4105 4875 6325
C
oo
li
n
Ratin
sSEER (Btuh/Watts) 11.0 11.05 12.05 11.00 11.05
Ratin s
EER (Btuh/Watts) 9.4 9.6 9.5 10.5 9.5 9.4
LARI Certified
Total Capacity Ċ Btuh (kW) 24,200 (7.1) 29,800 (8.7) 34,200 (10.0) 41,500 (12.2) 48,500 (14.2) 62,500 (18.3)
LARI
C
er
tifi
e
d
Hi h Total unit watts 2245 2800 3000 3880 4695 6180
Hi h
Temperature
Heatin Ratin s
C.O.P 3.16 3.12 3.34 3.20 3.04 2.98
Heatin Ratin s HSPF Ċ Re ion IV (Re ion V) 6.60 (5.90) 7.35 (5.70) 7.15 (6.30) 7.55 (6.70) 6.85 (6.05)
LARI Certified
L
Total Capacity Ċ Btuh (kW) 14,800 (4.3) 18,600 (5.4) 21,400 (6.3) 26,200 (7.7) 31,600 (9.3) 38,600 (11.3)
Low
Tem
p
erature Total unit watts 2085 2595 2725 3515 4225 5425
Temperature
Heatin Ratin s C.O.P 2.06 2.10 2.30 2.26 2.20 2.10
*Sound Ratin Number (db) 80 82 84
Refri erant Char e (HCFCĆ22) 5 lbs. 0 oz.
(2.27 k )
6 lbs. 8 oz.
(2.95 k )
6 lbs. 7 oz.
(2.92 k )
9 lbs. 12 oz.
(4.42 k )
10 lbs. 8 oz.
(4.76 k )
10 lbs. 5 oz.
(4.68 k )
Indoor Coil
Blower
Blower wheel nominal diameter x width -
in. (mm)
9 x 8
(229 x 203) 10 x 7 (254 x 178) 10 x 8 (254 x 203) 11 x 8 (279 x 203)
Bl
ower Motor output Ċ hp (W) 1/3 (249) 1/2 (373) 3/4 (560)
Indoor
Net face area Ċ sq. ft. (m2)3.2 (0.30) 4.1 (0.38) 4.1 (0.38) 5.8 (0.54) 5.8 (0.54)
Indoor
Coil
Tube diameter - in. (mm) & No. of rows 3/8 (9.5) Ċ 3
Coil
Fins per inch (m) 15 (591)
Net face area Outer coil 8.6 (0.80) 14.3 (1.33)
Outdoor
Net
face
area
Ċ sq. ft. (m2)Inner coil 5.3 (0.49) 8.3 (0.77) 9.9 (1.28) 13.8 (1.28)
Outdoor
Coil Tube diameter - in. (mm) & no. of rows 3/8 (9.5) - 1.6 3/8 (9.5) Ċ 2 3/8 (9.5) - 1.7 3/8 (9.5) Ċ 2
Fins per inch (m) 20 (787)
Diameter Ċ in. (mm) & No. of blades 20 (508) Ċ 4 24 (610) Ċ 4 24 (610) - 3
Outdoor Air Volume Ċ cfm (L/s) 2350 (1110) 2200 (1040) 3600 (1700) 4000 (1890)
Outdoor
Coil Fan Motor output Ċ hp (W) 1/6 (124) 1/4 (187) 1/3 (249)
Motor watts 220 340 430
Condensate drain size mpt Ċ in. (mm) 3/4 (19)
No. & size of cleanable polyurethane filters - in. (mm) (1) 16 x 25 x 1 (406 x 635 x 25) (1) 20 x 25 x 1 (508 x 635 x 25)
Net wei ht of basic unit Ċ lbs. (k ) 305 (138) 355 (161) 355 (161) 455 (206) 535 (243) 535 (243)
Shippin wei ht of basic unit Ċ lbs. (k ) (1 Pk .) 390 (177) 419 (190) 419 (190) 525 (238) 610 (277) 610 (277)
Electrical characteristics (60 hz) 208/230v-1ph
208/230v-1ph
208/230v or
460v - 3ph
208/230v-1ph 208/230v-1ph
208/230v or 460v - 3ph
ECH16RĆ5
Output Ċ Btuh (kW) 19,000 (5.6) Ć Ć Ć Ć Ć Ć Ć Ć
ECH16R
Ć
5
lA.F.U.E. 99.0% Ć Ć Ć Ć Ć Ć Ć Ć
ECH16RĆ7 Output Ċ Btuh (kW) 26,000 (7.6) 27,000 (7.9) 26,000 (7.6) 27,000 (7.9)
ECH16RĆ7
ECH16Ć7 lA.F.U.E. 99.0%
Electric Heat
ECH16RĆ10 Output Ċ Btuh (kW) 36,000 (10.5) 37,000 (10.8) 36,000 (10.5) 37,000 (10.8)
El
ec
t
r
i
c
H
ea
t
Model No.
ECH16RĆ10
ECH16Ć10 lA.F.U.E. 99.0%
Model
No
.
and
Ratin s
ECH16Ć15
Output Ċ Btuh (kW) 53,000 (15.6) 54,000 (15.8) 53,000 (15.6) 54,000 (15.8)
Ratin s
ECH16
Ć
15
lA.F.U.E. 99.0%
ECH16Ć20
Output Ċ Btuh (kW) Ć Ć Ć Ć Ć Ć Ć Ć 70,000 (20.5) 71,000 (20.8) 71,000 (20.8)
ECH16
Ć
20
lA.F.U.E. Ć Ć Ć Ć Ć Ć Ć Ć 99.0%
ECH16Ć25
Output Ċ Btuh (kW) Ć Ć Ć Ć Ć Ć Ć Ć Ć Ć Ć Ć 88,000 (25.7) 88,000 (25.8)
ECH16
Ć
25
lA.F.U.E. Ć Ć Ć Ć Ć Ć Ć Ć Ć Ć Ć Ć 99.0%
*Sound Ratin Number in accordance with test conditions included in ARI Standard 270.
lAnnual Fuel Utilization Efficiency based on DOE test procedures and FTC labelin re ulations.
LCertified in accordance with the USE certification pro ram, which is based on ARI standard 210/240.
Cooling RatingsĊ 95_F (35_C) outdoor air temperature and 80_F (27_C) db/67_F (19.5_C) wb enterin indoor coil air.
High Tem erature Heating RatingsĊ 47_F (8_C) db/43_F (6_C) wb outdoor air temperature and 70_F (21_C) enterin indoor coil air.
Low Tem erature Heating RatingsĊ 17_F (-8_C) db/15_F (-9_C) wb outdoor air temperature and 70_F (21_C) enterin indoor coil air.

Pa e 6
OPTIONAL ACCESSORIES CHA/CHP16
Model No. Ć024 Ć030 -036 -048 -060
Economizer with Gravity Exhaust Dam ers
(D Fl ) Itlldi tli bit i
3 position REMD16-41 - 48 lbs. (22 k ) REMD16-65 - 66 lbs. (30 k )
y
(Down-Flow) Ċ Installs directly in cabinet, recircuĆ
lated air dam
p
ers with
p
ressure o
p
erated ravit
y
US Fully Modulatin REMD16M-41 - 48 lbs. (22 k ) REMD16M-65 - 66 lbs. (30 k )
lated
air
dampers
with
pressure
operated
ravity
exhaust damper, formed, asketed damper blades,
nylon bearin s 24v damper motor has adjustable
US
Only Indoor Filter (1) 16 x 25 x 1 (406 x 635 x 25) (1) 20 x 25 x 1 (508 x 635 x 25)
ny
l
on
b
ear
i
n s,
24
v
d
amper mo
t
or
h
as a
dj
us
t
a
bl
e
minimum position switch, electronic dischar e air
sensor adjustable outdoor air enthalpy control Uti
Outdoor Filter (1) 14 x 25 x 1 (356 x 635 x 25) (1) 18 x 25 x 1 (457 x 635 x 25)
p,
sensor, adjustable outdoor air enthalpy control. UtiĆ
lizes filter furnished with unit, filter rack will acce
p
tFully Modulatin REMD16M-41S - 85 lbs. (39 k ) REMD16M-65S- 105 lbs. (48 k )
lizes
filter
furnished
with
unit
,
filter
rack
will
accept
up to 2 in. (51 mm) filter. Removable exhaust air
hood and outdoor air intake hood with cleanable
Canada
Only
Indoor Filter (1) 16 x 25 x 1 (406 x 635 x 25) (1) 20 x 25 x 1 (508 x 635 x 25)
h
oo
d
an
d
ou
td
oor a
i
r
i
n
t
a
k
e
h
oo
d
w
ith
c
l
eana
bl
e
aluminum mesh filter. Choice of economizer conĆ
trols.
Only
Outdoor Filter (1) 19-3/8 x 15-3/4 x 1 (1) 19-7/8 x 22-3/4 x 1
(505 x 578 x 25)
Economi er Dam ers (Hori ontal) Installs direct
3 position EMDH16-41 110 lbs. (50 k ) EMDH16-65 - 130 lbs. (59 k )
Economizer Dam ers (Horizontal) Ċ Installs directĆ
ly in cabinet, combination outdoor air and recircu
Ć
US
Fully Modulatin EMDH16M-41 - 110 lbs. (50 k ) EMDH16M-65 - 130 lbs. (59 k )
ly
in
cabinet
,
combination
outdoor
air
and
recircu
Ć
lated air damper, formed, asketed damper blades,
nylon bearin s, 24v damper motor has adjustable
ii iti ith l t i di h i
US
Only Indoor Filter (1) 20 x 24 x 1 (508 x 610 x 25) (1) 16 x 25 x 1 (406 x 635 x 25)
(1) 14 x 25 x1 (356 x 635 x 1)
y ,p j
minimum position switch, electronic dischar e air
sensor, adjustable outdoor air enthalpy control. 1 in
Outdoor Filter (1) 8 x 24 x 1 (203 x 610 x 25) (1) 8 x 28 x 1 (203 x 711 x 25)
sensor
,
adjustable
outdoor
air
enthalpy
control
.
1
in
(25 mm) fiber lass filter furnished, filter rack will
t t 2 i (51 ) filt td i i t k
Fully Modulatin EMDH16M-41S - 70 lbs. (32 k ) EMDH16M-65S - 86 lbs. (39 k )
(25
mm)
fiber lass
filter
furnished,
filter
rack
will
accept up to 2 in. (51 mm) filter, outdoor air intake
hood with aluminum mesh filter Choice of econo
ĆCanada
Ol
Indoor Filter (1) 20 x 20 x 1 (508 x 508 x 25) (1) 20 x 25 x 1 (508 x 635 x 25)
h
oo
d
w
ith
a
l
um
i
num mes
h
filt
er.
Ch
o
i
ce o
f
econoĆ
mizer controls. Only
Outdoor Filter (1) 16-1/2 x 21-3/4 x 1
(419 x 552 x 25)
(1) 22-1/2 x 25-1/4 x 1
(571 x 641 x 25)
Electric Heat Ċ Field installed, helix wound nichrome elements, time delay for eleĆ
ment sta in , individual element limit controls, wirin harness, may be twoĆsta e
controlled.
ECH16R - Supplemental thermal cutoff safety fuses and thermal
relay sequencer.
ECH16 - Supplemental secondary limits, heatin control relay,
fuse block, thermal relay sequencer (20-25 kW
208/230v) and alvanized steel control box.
See Electric Heat Data Tables
Electric Heat Single Point Power Source Sub-Fuse Box Ċ Use with ECH16R
electric heaters, use in conjunction with ECH16 fuse box for sin le point power
source applications, installs internal to unit, fuses furnished, constructed of alvaĆ
nized steel with prepunched mountin holes
See Electric Heat Data Tables
Unit Single Point Power Source Sub Fuse Box Ċ Installs internal to unit, proĆ
vides sub-fusin to the unit, used in conjunction with ECH16 or ECH16R for sin le
point power source applications, fuses furnished, constructed of alvanized steel
with prepunched mountin holes and electrical inlet and outlet holes, hin ed box
cover
See Electric Heat Data Tables
Enthal y Control, Differential Ċ Used in conjunction with outdoor air enthalpy
control. Determines and selects which air has the lowest enthalpy. Return air enĆ
thalpy sensor field installs in economizer damper section
54G44
Gravity Exhaust Dam ers Ċ For use with EMDH16. Pressure operated assembly
field installs in the return air duct adjacent to the economizer assembly. Includes
bird screen. - Net Wei ht
GEDH16-65 - 4 lbs. (2 k )
Horizontal Filter Kit (Canada Only) Ċ For horizontal applications, painted steel
cabinet with filter access, disposable, pleated fiber filter furnished, number and
size of filter - Net Wei ht
HF16-46S - 18 lbs. (8 k )
(1) 20 x 20 x 2 in.
(508 x 508 x 51 mm)
HF16-65S - 21 lbs. (10 k )
(1) 20 x 25 x 2 in.
(508 x 635 x 51 mm)
Low Ambient Control Kit Ċ Units operate down to 30°F (-1°C) outdoor air temperĆ
ature in coolin mode without any additional controls. A Low Ambient Kit can be
field installed, enablin unit to operate properly down to 0°F (Ć17.7°C).
CHP16 LB-57113BM (27J00)
CHA16 LB-57113BC (24H77)
Roof Curb Power Entry Kit Ċ Allows power entry throu h
roof mountin frame knockouts provided in roof frame kit
1/2 in. (13 mm) 18H70
roo
f
moun
ti
n
f
rame,
k
noc
k
ou
t
s prov
id
e
d
i
n roo
f
f
rame,
kit
contains 40 in. (1016 mm) armored conduit and installation
hardware two kits are required one for low volta e and one
1 in. (26 mm) 18H71
()
hardware, two kits are required, one for low volta e and one
for hi h volta e. See Dimension Drawin 1-1/2 in. (39 mm) 18H72
Roof Mounting Frame Ċ Nailer strip furnished, mates to unit, U.S. National RoofĆ
in Contractors Approved, shipped knocked down. RMF16-41 may be used on
all sizes, with a sli ht unit overhan on CHP16-048 and CHP16-060 units - Net
Wei ht
NOTE (US Only) Ċ Sound Reduction Plate must be ordered separately for field
installation.
RMF16-41 - 75 lbs. (35 k ) 97G59
Plate (order separately) (73H80)
RMF16-41 - 75 lbs. (35 k )
97G59
Plate (order separately)
(73H80)
RMF16-65 - 86 lbs.
(39 k ) 97G60
Plate (order separately)
(73H82)
Outdoor Air Dam er Section Ċ For downĆflow applications,
dam
p
er assembl
y
re
p
laces blower access
p
anel, manuall
y
US Only
OAD16-41 - 12 lbs. (5 k )
(1) 5 x 17 x 1 in.
(127 x 432 x 25 mm)
OAD16-65 - 12 lbs. (5 k )
(1) 8 x 17 x 1 in.
(203 x 432 x 25 mm)
damper
assembly
replaces
blower
access
panel
,
manually
adjustable, 0 to 25% (fixed) outdoor air, outdoor air hood with
cleanable filter included, number and size of filter - Net Wei ht Canada Only
OAD16-41S - 10 lbs. (5 k )
(1) 14 x 6 x 1 in.
(356 x 152 x 25 mm)
OAD16-65S - 16 lbs. (7 k )
(1) 18 x 6 x 1 in.
(457 x 152 x 25 mm)
Outdoor Air Dam er Section Ċ For horizontal applications, installs in return air
duct adjacent to unit, manually adjustable (fixed) outdoor air - Net Wei ht OAD3-46/65 - 8 lbs. (4 k )
Outdoor Thermostat Kit Ċ Used to lock out some of the
electric heatin elements on indoor units where two sta e
control is applicable Outdoor thermostat maintains the
Thermostat Kit LB-29740BA (56A87)
con
t
ro
l
i
s app
li
ca
bl
e.
O
u
td
oor
th
ermos
t
a
t
ma
i
n
t
a
i
ns
th
e
heatin load on the low power input as lon as possible
before allowin the full power load to come on line Mountin Box M-1595 (31461) / BM-10260 (33A09) Canada Only
Indoor filter is not furnished with economizer. REMD16 utilizes existin filter furnished with 16 unit.

Pa e 7
OPTIONAL ACCESSORIES CHA/CHP16 Cont.
Model No. Ć024 Ć030 -036 -048 -060
Coil Guards Ċ PVC coated steel wire uards to protect outdoor coil. LB-82199CF (47J23)
2 uards per order
LB-82199CG (47J24)
3 uards per order
Com ressor Monitor (Canada Only) Ċ NonĆadjustable switch (low ambiĆ
ent cutĆout) prevents compressor operation when outdoor temperature is
below 35°F (2°C).
T6-1469 (45F08)
Diffusers Ċ Aluminum rilles, lar e center rille, inĆ
sulated diffuser box with flan es, han in rin s furĆ
nished, interior transition (even air flow), internally
Ste ĆDown -
double deflecĆ
tion louvers
RTD9-65 - 67 lbs. (30 k )
nished
,
interior
transition
(even
air
flow)
,
internally
sealed (prevents recirculation), adapts to TĆbar ceilĆ
in rids or plaster ceilin s - Net Wei ht Flush - fixed
blade louvers FD9-65 Ć 37 lbs.(17 k )
Timed Off Control Ċ Prevents compressor shortĆcyclin and allows time
for suction and dischar e pressure to equalize, permittin the compressor
to start in an unloaded condition. Automatic reset control provides a time
delay between compressor shutoff and startĆup.
LB-50709BK (47J27)
Transitions (Su ly and Return) Ċ Used with diffusers, installs in roof
mountin frame, alvanized steel construction, flan es furnished for duct
connection, fully insulated - Net Wei ht
SRT16 - 20 lbs. (9 k )
Unit Stand-Off Mounting Kit Ċ Elevates horizontal application units
above mountin surface. Includes six hi h impact polystyrene standĆoff
mounts. See dimension drawin s.
38H18
OPTIONAL ACCESSORIES CHP20
Model No.
CHP20-024
CHP20-030
CHP20-036
CHP20-042
CHP20-048 CHP20-060
Coil Guards Ċ PVC coated steel wire uards to protect outdoor coil. LB-82199CF (47J23)
2 uards per order
LB-82199CG (47J24)
3 uards per order
Diffusers Ċ Aluminum rilles, lar e center rille, insulated
diffuser box with flan es, han in rin s furnished, interior
transition (even air flow), internally sealed (prevents recirĆ
)
Ste ĆDown -
double deflecĆ
tion louvers
RTD9-65 - 67 lbs. (30 k )
transition
(even
air
flow)
,
internally
sealed
(prevents
recirĆ
culation), adapts to TĆbar ceilin rids or plaster ceilin s -
Net Wei ht Flush - fixed
blade louvers FD9-65 Ć 37 lbs.(17 k )
Economizer with Gravity Exhaust Dam ers (Down-Flow) Ċ Installs directly in
cabinet, recirculated air dampers with pressure operated ravity exhaust dampĆ
er, formed, asketed damper blades, nylon bearin s, 3 position or fully moduĆ
latin 24v damper motor has adjustable minimum position switch, electronic
dischar e air sensor, adjustable outdoor air enthalpy control. Utilizes filter furĆ
nished with unit, filter rack will accept up to 2 in. (51 mm) filter. Removable
exhaust air hood and outdoor air intake hood with aluminum mesh filter. Choice
of economizer controls. Model No. - Net Wei ht - No. & size of filter, in. (mm)
3 Position:
REMD16-41 - 48 lbs. (22 k )
Modulatin :
REMD16M-41 - 48 lbs. (22 k )
Indoor: (1) 16 x 25 x 1
(406 x 635 x 25)
Outdoor : (1) 14 x 25 x 1
(356 x 635 x 25)
3 Position:
REMD16-65 - 66 lbs. (30 k )
Modulatin :
REMD16M-65 - 66 lbs. (30 k )
Indoor: (1) 20 x 25 x 1
(508 x 635 x 25)
Outdoor : (1) 18 x 25 x 1
(457 x 635 x 25)
Economizer Dam ers (Horizontal) Ċ Installs directly in cabinet, combination outĆ
door air and recirculated air damper, formed, asketed damper blades, nylon
bearin s, 3 position or fully modulatin 24v damper motor has adjustable miniĆ
mum position switch, electronic dischar e air sensor, adjustable outdoor air enĆ
thalpy control. 1 in (25 mm) fiber lass filter furnished, filter rack will accept up to 2
in. (51 mm) filter, outdoor air intake hood with aluminum mesh filter. Choice of
economizer controls. Model No. - Net Wei ht - No. & size of filter, in. (mm)
3 Position:
EMDH16-41 - 110 lbs. (50 k )
Modulatin :
EMDH16M-41 - 110 lbs. (50 k )
Indoor : (1) 20 x 24 x 1
(508 x 610 x 25)
Outdoor : (1) 8 x 24 x 1
(203 x 610 x 25)
3 Position:
EMDH16-65 - 130 lbs. (59 k )
Modulatin :
EMDH16M-65 - 130 lbs. (59 k )
Indoor : (1) 16 x 25 x 1
(406 x 635 x 25) &
(1) 14 x 25 x1 (356 x 635 x 1)
Outdoor : (1) 8 x 28 x 1
(203 x 711 x 25)
Electric Heat Ċ Field installed, helix wound nichrome elements, time delay for eleĆ
ment sta in , individual element limit controls, wirin harness, may be twoĆsta e
controlled.
ECH16R - Supplemental thermal cutoff safety fuses and thermal
relay sequencer.
ECH16 - Supplemental secondary limits, heatin control relay,
fuse block, thermal relay sequencer (20-25 kW
208/230v) and alvanized steel control box.
See Electric Heat Data Tables
Electric Heat Single Point Power Source Sub-Fuse Box Ċ Use with ECH16R elecĆ
tric heaters, use in conjunction with ECH16 fuse box for sin le point power source
applications, installs internal to unit, fuses furnished, constructed of alvanized steel
with prepunched mountin holes
See Electric Heat Data Tables
Unit Single Point Power Source Sub Fuse Box Ċ Installs internal to unit, provides
sub-fusin to the unit, used in conjunction with ECH16 or ECH16R for sin le point
power source applications, fuses furnished, constructed of alvanized steel with
prepunched mountin holes and electrical inlet and outlet holes, hin ed box cover
See Electric Heat Data Tables
Enthal y Control, Differential Ċ Used in conjunction with outdoor air enthalpy
control. Determines and selects which air has the lowest enthalpy. Return air enĆ
thalpy sensor field installs in economizer damper section
54G44
Gravity Exhaust Dam ers Ċ For use with EMDH16. Pressure operated assembly
field installs in the return air duct adjacent to the economizer assembly. Includes
bird screen. - Net Wei ht
GEDH16-65 - 4 lbs. (2 k )
Low Ambient Control Kit - Units operate down to 30°F (-1°C) outdoor air temperaĆ
ture in coolin mode without any additional controls. A Low Ambient Kit can be field
installed, enablin unit to operate properly down to 0°F (Ć17.7°C).
LB-57113BM (27J00)
Roof Curb Power Entry Kit Ċ Allows power entry throu h
roof mountin frame knockouts provided in roof frame kit
1/2 in. (13 mm) 18H70
roo
f
moun
ti
n
f
rame,
k
noc
k
ou
t
s prov
id
e
d
i
n roo
f
f
rame,
kit
contains 40 in. (1016 mm) armored conduit and installaĆ
tion hardware two kits are required one for low volta e
1 in. (26 mm) 18H71
()
tion hardware, two kits are required, one for low volta e
and one for hi h volta e. See Dimension Drawin 1-1/2 in. (39 mm) 18H72

Pa e 8
OPTIONAL ACCESSORIES CHP20 Cont.
Model No. CHP20-024, -030, -036 CHP20-042, -048 CHP20-060
Roof Mounting Frame Ċ Nailer strip furnished, mates to unit, U.S. National
Roofin Contractors Approved, shipped knocked down. RMF16-41 may be
used on all sizes, with a sli ht unit overhan on CHP20-048 and CHP20-060
units - Net Wei ht. NOTE (US Only) Ċ Sound Reduction Plate must be ordered
separately for field installation.
RMF16-41 - 75 lbs. (35 k )
Plate (order separately) (73H80)
RMF16-41 - 75 lbs. (35 k )
Plate (order separately) (73H80)
RMF16-65 - 86 lbs. (39 k )
Plate (order separately) (73H82)
Outdoor Air Dam er Section Ċ For downĆflow applications, damper assembly reĆ
places blower access panel, manually adjustable, 0 to 25% (fixed) outdoor air, outĆ
door air hood with cleanable filter included, number and size of filter - Net Wei ht
OAD16-41 - 12 lbs. (5 k )
(1) 5 x 17 x 1 in.
(127 x 432 x 25 mm)
OAD16-65 - 12 lbs. (5 k )
(1) 8 x 17 x 1 in.
(203 x 432 x 25 mm)
Outdoor Air Dam er Section Ċ For horizontal applications, installs in return
air duct adjacent to unit, manually adjustable (fixed) outdoor air - Net Wei ht OAD3-46/65 - 8 lbs. (4 k )
Outdoor Thermostat Kit Ċ Used to lock out some of the
electric heatin elements on indoor units where two
sta e control is applicable Outdoor thermostat maintains
Thermostat Kit LB-29740BA (56A87)
sta e control is applicable.
O
utdoor thermostat maintains
the heatin load on the low power input as lon as posĆ
sible before allowin the full power load to come on line Mountin Box M-1595 (31461)
Timed Off Control Ċ Prevents compressor shortĆcyclin and allows time for
suction and dischar e pressure to equalize, permittin the compressor to start
in an unloaded condition. Automatic reset control provides a time delay beĆ
tween compressor shutoff and startĆup.
LB-50709BK (47J27)
Transitions (Su ly and Return) Ċ Used with diffusers, installs in roof mountĆ
in frame, alvanized steel construction, flan es furnished for duct connection,
fully insulated - Net Wei ht
SRT16 - 20 lbs. (9 k )
Unit Stand-Off Mounting Kit Ċ Elevates horizontal application units above
mountin surface. Includes six hi h impact polystyrene standĆoff mounts. See
dimension drawin s.
38H18
Indoor filter is not furnished with economizer. REMD16 utilizes existin filter furnished with CHP20 unit.
ELECTRICAL DATA CHA16
Single Phase
ModelĂNo. CHA16Ć024 CHA16Ć030 CHA16Ć036 CHA16Ć048 CHA16Ć060
LineĂvolta eĂdataĂ-Ă60Ăhz 208/230v - 1 phase
Recommended maximum fuse size (amps) 25 30 40 50 60
{Minimum Circuit Ampacity 16 21 27 34 41
Compressor
Rated load amps 10.1 13.0 17.7 21.8 26.1
C
ompressor Locked rotor amps 60 69.4 100.0 131.0 170
Condenser Coil FullĂloadĂamps 1.1 2.3
Condenser
Coil
FanĂMotor LockedĂrotorĂamps 2.2 4.4
Evaporator FullĂloadĂamps 2.2 3 3.9 5.2
Evaporator
Blower Motor LockedĂrotorĂamps 4.2 6.2 8.3 10
{ReferĂtoĂNational or CanadianĂElectricalĂCodeĂmanualĂtoĂdetermineĂwire,ĂfuseĂandĂdisconnectĂsizeĂrequirements.
Where current does not exceed 100 amps, HACR type circuit breaker may be used in place of fuse (U.S. Only).
NOTEĂ-ĂExtremesĂofĂoperatin Ăran eĂareĂplusĂandĂminusĂ10%ĂofĂlineĂvolta e.
ELECTRICAL DATA CHA16
Three Phase
ModelĂNo. CHA16Ć036 CHA16Ć048 CHA16Ć060
LineĂvolta eĂdataĂ-Ă60Ăhz - 3 phase 208/230v 460v 575v 208/230v 460v 575v 208/230v 460v 575v
Recommended maximum fuse size (amps) 30 15 35 15 15 40 20 15
{Minimum Circuit Ampacity 20 11 9 23 11 10 28 14 12
Compressor
Rated load amps 12.2 6.2 4.6 12.8 6.4 5.1 16.2 8.0 6.5
C
ompressor Locked rotor amps 77 39 31 91 46 37 124 60 47.7
Condenser Coil FullĂloadĂamps 1.1 .73 .73 2.3 1.1 1.1 2.3 1.1 1.1
Condenser
Coil
FanĂMotor LockedĂrotorĂamps 2.2 1.3 1.3 4.4 2 2 4.4 2 2
Evaporator FullĂloadĂamps 3.0 1.8 1.8 3.9 1.8 1.8 5.2 2.7 2.7
Evaporator
Blower Motor LockedĂrotorĂamps 6.2 4.4 4.4 8.3 4.4 4.4 10 3.8 3.8
{ReferĂtoĂNational or CanadianĂElectricalĂCodeĂmanualĂtoĂdetermineĂwire,ĂfuseĂandĂdisconnectĂsizeĂrequirements.
Where current does not exceed 100 amps, HACR type circuit breaker may be used in place of fuse (U.S. Only).
Motors are rated at 460 volts. Full load amps shown are for step-down transformer output.
NOTEĂ-ĂExtremesĂofĂoperatin Ăran eĂareĂplusĂandĂminusĂ10%ĂofĂlineĂvolta e.

Pa e 9
ELECTRICAL DATA CHP16
ModelĂNo. Ć024 Ć030 Ć036 Ć048 Ć060
LineĂvolta eĂdataĂ-Ă60Ăhz 208/230v - 1 phase 208/230v
1 phase
208/230v
3 phase
460v -
3 phase
208/230v
1 phase
208/230v
3 phase
460v -
3 phase
208/230v
1 phase
208/230v
3 phase
460v -
3 phase
Recommended max. fuse size (amps) 25 30 40 30 15 50 35 15 60 40 20
{Minimum Circuit Ampacity 16 21 27 20 11 34 23 11 39 27 13
Compressor
Rated load amps 10.1 13.0 17.7 12.2 6.2 21.8 12.8 6.4 25.0 15.5 7.5
C
ompressor Locked rotor amps 60.0 69.4 100.0 77.0 39.0 131.0 91.0 46.0 170.0 124.0 60.0
Outdoor Coil FullĂloadĂamps 1.1 0.73 2.3 1.1 2.3 1.1
Outdoor
Coil
FanĂMotor LockedĂrotorĂamps 2.2 1.3 4.4 2.0 4.4 2.0
Indoor Coil FullĂloadĂamps 2.1 3.0 1.8 3.9 1.8 4.6 2.4
Indoor
Coil
Blower Motor LockedĂrotorĂamps 4.2 6.2 4.4 8.3 4.4 10.0 3.8
{ReferĂtoĂNational or CanadianĂElectricalĂCodeĂmanualĂtoĂdetermineĂwire,ĂfuseĂandĂdisconnectĂsizeĂrequirements.
Where current does not exceed 100 amps, HACR type circuit breaker may be used in place of fuse (U.S. Only).
NOTEĂ-ĂExtremesĂofĂoperatin Ăran eĂareĂplusĂandĂminusĂ10%ĂofĂlineĂvolta e.
ELECTRICAL CHP20
Single Phase
CHP20 ModelĂNo. CHP20Ć024 CHP20Ć030 CHP20Ć036 CHP20Ć042 CHP20Ć048 CHP20Ć060
LineĂvolta eĂdata - 60 hz 208/230v
"RecommendedĂmaximumĂfuseĂsizeĂ(amps) 30 35 40 50 60 70
{MinimumĂCircuitĂAmpacity 19 22 25 32 36 44
Compressors
RatedĂloadĂamps 12.2 13.8 16.1 20.1 23.7 28.8
C
ompressors LockedĂrotorĂamps 61.0 73.0 88.0 104.0 129.0 169.0
Outdoor Coil FullĂloadĂamps 1.1 2.3 2.4
Outdoor
Coil
FanĂMotor LockedĂrotorĂamps 2.2 4.4
Indoor Coil
Blower Motor
FullĂloadĂampsĂ 2.1 3.0 3.9 4.6
Bl
ower
M
otor
(1 phase) LockedĂrotorĂampsĂ 4.2 6.2 8.3 10.0
{ReferĂtoĂNationalĂor Canadian ElectricalĂCodeĂmanualĂtoĂdetermineĂwire,ĂfuseĂandĂdisconnectĂsizeĂrequirements.
"WhereĂcurrentĂdoesĂnotĂexceedĂ100Ăamps,ĂHACRĂtypeĂcircuitĂbreakerĂmayĂbeĂusedĂinĂplaceĂofĂfuse.
NOTEĂĊĂExtremesĂofĂoperatin Ăran eĂareĂplusĂandĂminusĂ10%ĂofĂlineĂvolta e.
ELECTRICAL CHP20
Three Phase
CHP20 ModelĂNo. CHP20Ć036 CHP20Ć048 CHP20Ć060
LineĂvolta eĂdata - 60 hz - 3 phase 208/230v 460v 208/230v 460v 208/230v 460v
"RecommendedĂmaximumĂfuseĂsizeĂ(amps) 25 15 35 15 45 20
{MinimumĂCircuitĂAmpacity 17 10 24 13 29 15
Compressors
RatedĂloadĂamps 10.3 5.2 13.5 7.4 17.3 9
C
ompressors LockedĂrotorĂamps 77 39 120 49.5 137 62
Outdoor Coil FullĂloadĂamps 1.1 0.73 2.3 1.1 2.4 1.3
Outdoor
Coil
FanĂMotor LockedĂrotorĂamps 2.2 1.3 4.4 24.4 2.0
Indoor Coil FullĂloadĂampsĂ 31.8 3.9 1.8 4.6 2.4
Indoor
Coil
Blower Motor (1 phase) LockedĂrotorĂampsĂ 6.2 4.4 8.3 4.4 10 3.8
{ReferĂtoĂNationalĂor Canadian ElectricalĂCodeĂmanualĂtoĂdetermineĂwire,ĂfuseĂandĂdisconnectĂsizeĂrequirements.
"WhereĂcurrentĂdoesĂnotĂexceedĂ100Ăamps,ĂHACRĂtypeĂcircuitĂbreakerĂmayĂbeĂusedĂinĂplaceĂofĂfuse.
NOTEĂĊĂExtremesĂofĂoperatin Ăran eĂareĂplusĂandĂminusĂ10%ĂofĂlineĂvolta e.

Pa e 10
BLOWER DATA CHA16
CHA16-024 BLOWER PERFORMANCE
@ 230 VOLTS (With Down-Flow Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1370 645 950 450 875 415 660 310
.05 12 1365 645 955 450 880 415 670 315
.10 25 1350 635 960 455 885 420 675 320
.15 37 1340 630 960 455 885 420 680 320
.20 50 1320 625 955 450 880 415 680 320
.25 62 1300 615 950 450 875 415 680 320
.30 75 1280 605 940 445 870 410 675 320
.40 100 1220 575 920 435 850 400 660 310
.50 125 1150 545 880 415 820 385 630 295
.60 150 1070 505 835 395 775 365 585 275
.70 175 975 460 780 370 725 340 535 250
.75 185 925 435 745 350 700 330 500 235
NOTE Ċ For 208v unit operation, derate air volume by 7%. All air data is meaĆ
sured external to the unit with dry coil and without air filter.
CHA16-024 BLOWER PERFORMANCE
@ 230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1405 665 905 425 820 385 620 295
.05 12 1400 660 935 440 845 400 640 300
.10 25 1385 655 955 450 865 410 655 310
.15 37 1370 645 975 460 880 415 665 315
.20 50 1355 640 985 465 890 420 670 315
.25 62 1335 630 990 465 895 420 670 315
.30 75 1310 620 985 465 890 420 670 315
.40 100 1260 595 965 455 870 410 650 305
.50 125 1195 565 915 430 830 390 615 290
.60 150 1120 530 840 395 865 410 560 265
.70 175 1035 490 740 350 675 320 490 230
.75 185 990 465 685 325 620 295 445 210
NOTE Ċ For 208v unit operation, derate air volume by 7%. All air data is measured
external to the unit with dry coil and without air filter.
CHA16-030 BLOWER PERFORMANCE
@ 230 VOLTS (With Down-Flow Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1355 640 1255 590 1105 520 900 425
.05 12 1345 635 1250 590 1100 520 910 430
.10 25 1330 630 1245 590 1090 515 915 430
.15 37 1310 620 1235 585 1080 510 915 430
.20 50 1290 610 1220 575 1070 505 910 430
.25 62 1270 600 1205 570 1055 500 900 425
.30 75 1245 590 1180 555 1035 490 890 420
.40 100 1190 560 1130 535 990 465 855 405
.50 125 1125 530 1060 500 935 440 805 380
.60 150 1050 495 980 560 870 410 735 345
.70 175 960 455 885 420 790 375 655 310
.75 185 915 430 835 395 745 350 605 285
NOTE Ċ For 208v unit operation, derate air volume by 7%. All air data is measured
external to the unit with dry coil and without air filter.
CHA16-030 BLOWER PERFORMANCE
@ 230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1445 680 1330 630 1105 520 900 425
.05 12 1435 680 1295 610 1105 520 910 430
.10 25 1420 670 1285 605 1105 520 915 430
.15 37 1400 660 1275 600 1100 520 920 435
.20 50 1380 650 1265 595 1095 515 920 435
.25 62 1360 640 1250 590 1085 510 915 430
.30 75 1335 630 1230 580 1070 505 905 425
.40 100 1280 605 1185 560 1035 490 880 415
.50 125 1220 575 1135 535 995 470 840 395
.60 150 1150 545 1070 505 935 440 790 375
.70 175 1070 505 995 470 870 410 720 340
.75 185 1025 485 955 450 830 390 680 320
NOTE Ċ For 208v unit operation, derate air volume by 7%. All air data is measured
external to the unit with dry coil and without air filter.

Pa e 11
BLOWER DATA CHA16 Cont
CHA16-036 BLOWER PERFORMANCE
@ 230 VOLTS (With Down-Flow Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1415 670 1350 635 1135 530 915 430
.05 12 1395 660 1335 630 1125 530 905 425
.10 25 1375 650 1315 620 1115 525 895 420
.15 37 1360 640 1290 610 1110 525 890 420
.20 50 1355 640 1275 600 1105 520 885 420
.25 62 1325 625 1255 590 1095 515 875 415
.30 75 1310 620 1235 585 1085 510 865 410
.40 100 1265 595 1195 565 1060 500 845 400
.50 125 1220 575 1155 545 1020 480 825 390
.60 150 1170 550 1105 520 975 460 785 370
.70 175 1115 525 1045 495 925 435 725 340
.75 185 1085 510 1010 475 895 420 685 325
NOTE Ċ For 208v unit operation, derate air volume by 7%. All air data is meaĆ
sured external to the unit with dry coil and without air filter.
CHA16-036 BLOWER PERFORMANCE
@ 230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1490 705 1460 690 1145 540 920 435
.05 12 1470 695 1440 680 1135 535 910 430
.10 25 1450 685 1420 670 1125 530 900 425
.15 37 1435 675 1395 660 1120 530 895 420
.20 50 1430 675 1375 650 1115 525 890 420
.25 62 1400 660 1355 640 1105 520 880 415
.30 75 1380 650 1335 630 1095 515 870 410
.40 100 1335 630 1285 605 1070 505 850 400
.50 125 1285 605 1235 585 1030 485 830 390
.60 150 1235 585 1195 565 985 465 790 375
.70 175 1185 560 1140 540 935 440 730 345
.75 185 1160 545 1110 525 905 425 690 325
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHA16-036 BLOWER PERFORMANCE
@ 460/575 VOLTS (With Down-Flow Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 1625 765 1465 690 1100 520
.05 12 1600 755 1445 680 1100 520
.10 25 1570 740 1420 670 1100 520
.15 37 1555 735 1395 660 1095 515
.20 50 1525 720 1385 655 1090 515
.25 62 1485 700 1365 645 1075 505
.30 75 1465 690 1340 630 1070 505
.40 100 1400 660 1285 605 1035 490
.50 125 1335 630 1235 585 1005 475
.60 150 1260 595 1165 550 955 450
.70 175 1170 550 1085 510 875 415
.75 185 1100 520 1045 495 815 385
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHA16-036 BLOWER PERFORMANCE
@ 460/575 VOLTS (With Horizontal Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 1710 805 1590 750 1105 520
.05 12 1685 795 1565 740 1105 520
.10 25 1655 780 1535 725 1105 520
.15 37 1630 770 1510 715 1100 520
.20 50 1610 760 1490 705 1095 515
.25 62 1570 740 1470 695 1085 510
.30 75 1540 725 1445 680 1075 505
.40 100 1475 695 1385 655 1040 490
.50 125 1405 665 1330 630 1010 475
.60 150 1335 630 1260 595 960 455
.70 175 1240 585 1185 560 885 420
.75 185 1180 555 1150 545 825 390
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHA16-048 BLOWER PERFORMANCE
@ 230 VOLTS (With Down-Flow Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 2065 975 1715 810 1515 715 1305 615
.05 12 2055 970 1705 805 1505 710 1300 615
.10 25 2040 965 1690 800 1495 705 1300 615
.15 37 2020 955 1680 795 1485 700 1295 610
.20 50 2000 945 1665 785 1475 695 1290 610
.25 62 1975 930 1650 780 1470 695 1285 605
.30 75 1950 920 1635 770 1450 685 1280 605
.40 100 1885 890 1600 755 1425 670 1260 595
.50 125 1810 855 1565 740 1395 660 1225 580
.60 150 1730 815 1525 720 1360 640 1175 555
.70 175 1645 775 1600 755 1320 625 1110 525
.75 185 1600 755 1455 685 1295 610 1070 505
NOTE Ċ For 208v unit operation, derate air volume by 7%. All air data is meaĆ
sured external to the unit with dry coil and without air filter.
CHA16-048 BLOWER PERFORMANCE
@ 230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 2140 1010 1785 840 1535 725 1305 615
.05 12 2115 1000 1770 835 1530 720 1300 615
.10 25 2090 985 1755 830 1520 715 1295 610
.15 37 2070 975 1745 825 1510 715 1290 610
.20 50 2045 965 1730 815 1500 710 1285 605
.25 62 2020 955 1715 810 1490 705 1280 605
.30 75 1995 940 1700 800 1480 700 1275 600
.40 100 1935 915 1665 785 1460 690 1260 595
.50 125 1875 885 1630 770 1430 675 1235 585
.60 150 1800 850 1585 750 1400 660 1205 570
.70 175 1710 805 1530 720 1370 645 1170 550
.75 185 1655 780 1495 705 1355 640 1150 545
NOTE Ċ For 208v unit operation, derate air volume by 7%. All air data is meaĆ
sured external to the unit with dry coil and without air filter.

Pa e 12
BLOWER DATA CHA16 Cont.
CHA16-048 BLOWER PERFORMANCE
@ 460/575 VOLTS (With Down-Flow Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 2140 1010 1745 825 1175 555
.05 12 2120 1000 1730 815 1175 555
.10 25 2080 980 1720 810 1170 550
.15 37 2045 965 1710 805 1170 550
.20 50 2005 945 1695 800 1165 550
.25 62 1975 930 1680 795 1160 545
.30 75 1940 915 1665 785 1150 545
.40 100 1870 885 1625 765 1135 535
.50 125 1790 845 1580 745 1110 525
.60 150 1705 805 1515 715 1075 505
.70 175 1605 760 1430 675 1030 485
.75 185 1555 740 1375 650 1000 470
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHA16-048 BLOWER PERFORMANCE
@ 460/575 VOLTS (With Horizontal Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 2160 1020 1815 855 1210 570
.05 12 2125 1005 1800 850 1210 570
.10 25 2095 990 1790 845 1200 565
.15 37 2060 970 1780 840 1200 565
.20 50 2025 955 1760 830 1195 565
.25 62 1990 940 1745 825 1190 560
.30 75 1955 925 1730 815 1185 560
.40 100 1885 890 1690 800 1170 550
.50 125 1805 850 1640 775 1140 540
.60 150 1715 810 1575 745 1105 520
.70 175 1615 760 1495 705 1065 505
.75 185 1560 735 1445 680 1040 490
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHA16-060 BLOWER PERFORMANCE
@ 230 VOLTS (With DownĆFlow Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High Medium MediumĆ Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s
0 0 2725 1285 2490 1175 2235 1055 1940 915 1620 765
.05 12 2695 1270 2435 1150 2210 1045 1930 910 1625 765
.10 25 2665 1260 2430 1145 2185 1030 1925 910 1625 765
.15 37 2635 1245 2415 1140 2160 1020 1910 900 1610 760
.20 50 2600 1225 2395 1130 2140 1010 1895 895 1590 750
.25 62 2555 1205 2365 1115 2130 1005 1880 885 1580 745
.30 75 2510 1185 2335 1100 2115 1000 1865 880 1565 740
.40 100 2445 1155 2275 1075 2060 970 1830 865 1540 725
.50 125 2385 1125 2230 1050 2005 945 1765 835 1505 710
.60 150 2285 1080 2140 1010 1940 915 1725 815 1455 685
.70 175 2210 1045 2075 980 1880 885 1660 785 1405 665
.75 185 2175 1025 2030 960 1845 870 1615 760 1370 645
NOTE Ċ For 208v unit operation, derate air volume by 7%. All air data is meaĆ
sured external to the unit with dry coil and without air filter.
CHA16-060 BLOWER PERFORMANCE
@ 230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High Medium MediumĆ Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s
0 0 2850 1345 2530 1195 2255 1065 1970 930 1640 775
.05 12 2820 1330 2475 1170 2230 1050 1965 925 1645 775
.10 25 2790 1315 2475 1170 2205 1040 1955 925 1645 775
.15 37 2760 1300 2455 1160 2180 1030 1940 915 1630 770
.20 50 2725 1285 2435 1150 2160 1020 1925 910 1610 760
.25 62 2680 1265 2405 1135 2150 1015 1910 900 1600 755
.30 75 2630 1240 2375 1120 2135 1010 1895 895 1585 750
.40 100 2570 1215 2315 1090 2080 980 1860 880 1560 735
.50 125 2510 1185 2270 1070 2025 955 1795 845 1525 720
.60 150 2410 1135 2180 1030 1960 925 1755 830 1475 695
.70 175 2335 1100 2115 1000 1900 895 1690 800 1425 670
.75 185 2300 1085 2070 975 1865 880 1650 780 1390 655
NOTE Ċ For 208v unit operation, derate air volume by 7%. All air data is meaĆ
sured external to the unit with dry coil and without air filter.
CHA16-060 BLOWER PERFORMANCE
@ 460/575 VOLTS (With Down-Flow Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 2725 1285 2405 1135 1905 900
.05 12 2680 1265 2365 1115 1890 890
.10 25 2635 1245 2325 1095 1870 880
.15 37 2590 1220 2290 1080 1855 875
.20 50 2550 1205 2255 1065 1840 870
.25 62 2515 1185 2220 1050 1820 860
.30 75 2485 1175 2190 1035 1795 845
.40 100 2395 1130 2120 1000 1745 825
.50 125 2325 1095 2050 965 1680 795
.60 150 2235 1055 1970 930 1570 740
.70 175 2150 1015 1900 895 1560 735
.75 185 2100 990 1860 880 1515 715
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHA16-060 BLOWER PERFORMANCE
@ 460/575 VOLTS (With Horizontal Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 2850 1345 2430 1145 1940 915
.05 12 2805 1325 2385 1125 1920 905
.10 25 2760 1300 2345 1105 1905 900
.15 37 2715 1280 2310 1090 1885 890
.20 50 2670 1260 2275 1075 1870 880
.25 62 2640 1245 2240 1055 1850 875
.30 75 2605 1230 2210 1045 1825 860
.40 100 2515 1185 2140 1010 1775 840
.50 125 2445 1155 2120 1000 1710 805
.60 150 2355 1110 1990 940 1600 755
.70 175 2270 1070 1920 905 1590 750
.75 185 2225 1050 1880 885 1545 730
NOTE - All air data is measured external to the unit with dry coil and without air filter.

Pa e 13
BLOWER DATA CHP16/20
CHP16/20Ć024 BLOWER PERFORMANCE
230 VOLTS (With DownĆFlow Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1385 655 1025 485 900 425 685 325
.05 12 1380 650 1035 490 915 430 700 330
.10 25 1365 645 1045 495 925 435 710 335
.15 37 1350 635 1045 495 930 440 715 335
.20 50 1330 630 1040 490 930 440 715 335
.25 62 1305 615 1030 485 925 435 715 335
.30 75 1275 600 1010 475 915 430 705 335
.40 100 1205 570 965 455 880 415 680 320
.50 125 1120 530 890 420 820 385 640 300
.60 150 1015 480 800 380 740 350 585 275
.70 175 900 425 685 325 640 300 510 240
.75 185 835 395 615 290 580 275 470 220
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.
CHP16/20Ć024 BLOWER PERFORMANCE
230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1435 675 1035 490 895 420 625 295
.05 12 1420 670 1050 495 915 430 645 305
.10 25 1400 660 1060 500 925 435 660 310
.15 37 1380 650 1060 500 935 440 670 315
.20 50 1360 640 1060 500 935 440 675 320
.25 62 1335 630 1050 495 930 440 675 320
.30 75 1305 615 1035 490 920 435 670 315
.40 100 1235 585 985 465 875 415 650 305
.50 125 1155 545 910 430 810 380 605 285
.60 150 1065 505 810 380 720 340 545 255
.70 175 960 455 690 325 605 285 465 220
.75 185 905 425 620 295 540 255 415 195
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.
CHP16/20Ć030 BLOWER PERFORMANCE
230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1485 700 1345 635 1115 525 920 435
.05 12 1480 700 1340 630 1120 530 930 440
.10 25 1465 690 1335 630 1120 530 940 445
.15 37 1455 685 1325 625 1115 525 945 445
.20 50 1435 675 1315 620 1110 525 945 445
.25 62 1420 670 1305 615 1105 520 940 445
.30 75 1400 660 1285 605 1095 515 935 440
.40 100 1350 635 1250 590 1065 505 910 430
.50 125 1295 610 1200 565 1025 485 875 415
.60 150 1230 580 1145 540 975 460 820 385
.70 175 1160 545 1075 505 915 430 755 355
.75 185 1120 530 1040 490 885 420 720 340
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.
CHP16/20Ć036 BLOWER PERFORMANCE
230 VOLTS (With DownĆFlow Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1360 640 1270 600 1070 505 890 420
.05 12 1355 640 1250 590 1060 500 885 420
.10 25 1350 635 1230 580 1050 495 880 415
.15 37 1330 630 1220 575 1035 490 870 410
.20 50 1310 620 1210 570 1020 480 860 405
.25 62 1295 610 1190 560 1005 475 845 340
.30 75 1280 605 1170 550 990 470 830 390
.40 100 1230 580 1130 535 960 455 800 380
.50 125 1170 550 1070 505 910 430 760 360
.60 150 1100 520 990 465 850 400 700 330
.70 175 1020 480 890 420 780 370 620 295
.75 185 975 460 830 390 740 350 570 270
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.
CHP16/20Ć030 BLOWER PERFORMANCE
230 VOLTS (With DownĆFlow Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1485 700 1250 590 1085 500 905 425
.05 12 1460 690 1250 590 1075 505 900 425
.10 25 1430 675 1240 585 1070 505 895 420
.15 37 1400 660 1235 585 1060 500 890 420
.20 50 1375 650 1225 580 1045 495 885 420
.25 62 1345 635 1215 575 1035 490 875 415
.30 75 1315 620 1200 565 1020 480 865 410
.40 100 1255 590 1165 550 990 465 835 395
.50 125 1190 560 1125 530 950 450 805 380
.60 150 1125 530 1075 510 910 430 770 365
.70 175 1060 500 1015 480 865 410 725 340
.75 185 1025 485 985 465 840 395 700 330
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.
CHP16/20Ć036 BLOWER PERFORMANCE
230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 1450 685 1370 645 1080 510 900 425
.05 12 1430 675 1350 635 1070 505 890 420
.10 25 1410 665 1330 630 1060 500 880 415
.15 37 1395 660 1310 615 1055 500 875 415
.20 50 1380 650 1290 610 1050 495 870 410
.25 62 1360 640 1270 600 1040 490 860 405
.30 75 1340 630 1250 590 1030 485 850 400
.40 100 1300 615 1210 570 1010 475 830 390
.50 125 1250 590 1170 550 970 460 810 380
.60 150 1200 565 1120 530 930 440 770 365
.70 175 1150 545 1060 500 890 420 710 335
.75 185 1125 530 1025 485 870 410 670 315
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.

Pa e 14
BLOWER DATA CHP16/20 Cont.
CHP16/20Ć036 BLOWER PERFORMANCE
460 VOLTS (With DownĆFlow Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 1560 735 1380 650 1070 505
.05 12 1555 735 1355 640 1075 505
.10 25 1540 725 1330 630 1080 510
.15 37 1510 715 1320 625 1070 505
.20 50 1475 695 1315 620 1060 500
.25 62 1450 685 1295 610 1040 490
.30 75 1430 675 1270 600 1025 485
.40 100 1360 640 1215 575 980 460
.50 125 1280 605 1145 540 925 435
.60 150 1185 560 1045 495 850 400
.70 175 1070 505 925 435 750 355
.75 185 990 465 860 405 680 320
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHP16/20Ć036 BLOWER PERFORMANCE
460 VOLTS (With Horizontal Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 1665 785 1490 705 1080 510
.05 12 1640 775 1465 690 1080 510
.10 25 1610 760 1440 680 1080 510
.15 37 1585 750 1420 670 1075 505
.20 50 1555 735 1400 660 1070 505
.25 62 1525 720 1380 650 1060 500
.30 75 1495 705 1355 640 1050 495
.40 100 1435 675 1300 615 1015 480
.50 125 1365 645 1250 590 985 465
.60 150 1295 610 1180 555 935 440
.70 175 1205 570 1100 520 860 405
.75 185 1145 540 1060 500 800 380
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHP20-042 CHP16/20Ć048 BLOWER PERFORMANCE
230 VOLTS (With Down-Flow Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 2015 950 1610 760 1425 670 1240 585
.05 12 2000 945 1595 755 1420 670 1235 585
.10 25 1980 935 1580 745 1415 670 1235 585
.15 37 1960 925 1575 745 1415 670 1230 580
.20 50 1935 915 1560 735 1405 665 1225 580
.25 62 1910 900 1540 725 1395 660 1215 575
.30 75 1885 890 1520 715 1385 655 1205 570
.40 100 1825 860 1485 700 1355 640 1185 560
.50 125 1760 830 1445 680 1315 620 1160 550
.60 150 1690 800 1395 660 1260 595 1130 535
.70 175 1615 760 1335 630 1190 560 1095 515
.75 185 1575 745 1300 615 1145 540 1065 505
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.
CHP20-042 CHP16/20Ć048 BLOWER PERFORMANCE
230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High
MediumĆ
Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s
0 0 2075 980 1675 790 1445 680 1275 600
.05 12 2060 970 1660 785 1440 680 1270 600
.10 25 2040 965 1645 775 1435 675 1270 600
.15 37 2020 955 1635 770 1435 675 1265 595
.20 50 1995 940 1620 765 1425 670 1260 595
.25 62 1965 930 1600 755 1415 670 1250 590
.30 75 1940 915 1580 745 1405 665 1240 585
.40 100 1880 890 1545 730 1375 650 1220 575
.50 125 1815 855 1500 710 1335 630 1195 565
.60 150 1740 820 1450 685 1280 605 1165 550
.70 175 1655 780 1395 660 1210 570 1130 535
.75 185 1605 755 1365 645 1165 550 1110 525
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.
CHP16/20Ć048 BLOWER PERFORMANCE
460 VOLTS (With DownĆFlow Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 2075 980 1650 780 1105 520
.05 12 2045 965 1635 770 1105 520
.10 25 2015 950 1625 765 1100 520
.15 37 1980 935 1615 760 1100 520
.20 50 1945 920 1600 755 1095 515
.25 62 1915 905 1585 750 1090 515
.30 75 1880 890 1570 740 1085 510
.40 100 1810 855 1535 725 1070 505
.50 125 1735 820 1490 705 1045 495
.60 150 1650 780 1430 675 1010 475
.70 175 1555 735 1355 640 965 455
.75 185 1500 710 1310 620 935 440
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHP16/20Ć048 BLOWER PERFORMANCE
460 VOLTS (With Horizontal Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 2090 985 1755 830 1115 525
.05 12 2065 975 1740 820 1115 525
.10 25 2035 960 1720 810 1110 525
.15 37 2005 945 1705 805 1110 525
.20 50 1975 930 1685 795 1105 520
.25 62 1950 920 1675 790 1100 520
.30 75 1920 905 1650 780 1095 515
.40 100 1860 880 1600 755 1080 510
.50 125 1790 845 1555 735 1055 500
.60 150 1720 810 1495 705 1020 480
.70 175 1640 775 1425 670 975 460
.75 185 1595 755 1385 655 945 445
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.

Pa e 15
BLOWER DATA CHP16/20 Cont.
CHP16/20Ć060 BLOWER PERFORMANCE
230 VOLTS (With Down-Flow Air O enings)
External Air Volume at Various Blower S eeds
External
Static
Pressure High MediumĆ
High Medium MediumĆ Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s
0 0 2450 1155 2200 1040 1990 940 1760 830 1460 690
.05 12 2430 1145 2180 1030 1980 935 1750 825 1470 695
.10 25 2410 1135 2170 1025 1970 930 1740 820 1490 705
.15 37 2390 1130 2160 1020 1960 925 1730 815 1500 710
.20 50 2360 1115 2140 1010 1950 920 1720 810 1490 705
.25 62 2340 1105 2120 1000 1930 910 1710 805 1490 705
.30 75 2320 1095 2100 990 1910 900 1700 800 1480 700
.40 100 2270 1070 2060 970 1880 885 1670 780 1470 695
.50 125 2230 1052 2010 950 1830 865 1640 775 1430 675
.60 150 2170 1025 1930 910 1780 840 1600 755 1390 655
.70 175 2120 1000 1890 890 1730 815 1550 730 1340 630
.75 185 2080 980 1850 875 1700 800 1530 720 1310 620
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.
CHP16/20Ć060 BLOWER PERFORMANCE
230 VOLTS (With Horizontal Air O enings)
External Static
Air Volume at Various Blower S eeds
External Static
Pressure High MediumĆ
High Medium MediumĆ Low Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s
0 0 2570 1215 2220 1050 2000 945 1780 840 1510 715
.05 12 2560 1210 2210 1045 1990 940 1780 840 1520 715
.10 25 2540 1200 2200 1040 1980 935 1770 835 1530 720
.15 37 2520 1190 2190 1035 1970 930 1770 835 1520 715
.20 50 2500 1180 2180 1030 1960 925 1760 830 1510 715
.25 62 2480 1170 2160 1020 1940 915 1750 825 1510 715
.30 75 2440 1150 2140 1010 1920 905 1740 820 1500 710
.40 100 2390 1130 2100 990 1900 895 1710 805 1470 695
.50 125 2320 1095 2060 970 1860 880 1670 790 1440 680
.60 150 2240 1055 2010 950 1810 855 1630 770 1400 660
.70 175 2160 1020 1950 920 1760 830 1580 745 1350 635
.75 185 2120 1000 1920 905 1720 810 1560 735 1330 630
NOTE Ċ For 208v unit operation, derate air volume by 7% All air data is measured
external to the unit with dry coil and without air filter.
CHP16/20Ć060 BLOWER PERFORMANCE
460 VOLTS (With DownĆFlow Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 2450 1155 2090 985 1740 820
.05 12 2430 1145 2080 980 1740 820
.10 25 2410 1135 2060 970 1730 815
.15 37 2390 1130 2040 965 1720 810
.20 50 2360 1115 2020 955 1710 805
.25 62 2340 1105 2000 945 1700 800
.30 75 2320 1095 1990 940 1680 795
.40 100 2270 1070 1940 915 1630 770
.50 125 2230 1050 1880 885 1590 750
.60 150 2170 1025 1840 870 1520 715
.70 175 2120 1000 1770 835 1460 690
.75 185 2080 980 1740 820 1440 680
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.
CHP16/20Ć060 BLOWER PERFORMANCE
460 VOLTS (With Horizontal Air O enings)
External Static Air Volume at Various Blower S eeds
External
Static
Pressure High Medium Low
in. w.g. Pa cfm L/s cfm L/s cfm L/s
0 0 2570 1215 2100 990 1760 830
.05 12 2560 1210 2090 985 1770 835
.10 25 2540 1200 2070 975 1760 830
.15 37 2520 1190 2050 965 1760 830
.20 50 2500 1180 2030 960 1750 825
.25 62 2480 1170 2010 950 1740 820
.30 75 2440 1150 2000 945 1720 810
.40 100 2390 1130 1960 925 1670 790
.50 125 2320 1095 1910 900 1620 765
.60 150 2240 1105 1870 880 1550 730
.70 175 2160 1020 1800 850 1490 705
.75 185 2120 1000 1760 830 1470 695
NOTE Ċ All air data is measured external to the unit with dry coil and without air filter.

Pa e 16
ACCESSORY BLOWER DATA CHA/CHP16/20
FILTER AND ACCESSORY AIR RESISTANCE CHA/CHP16/20
Total Air Resistance Ċ inches water gauge (Pa)
Unit
Mdl
Air
Volume
1 in (25mm)
REMD16 DownĆFlow Economizer EMDH16 Horizontal
Economizer
Unit
Model
No.
Volume
1 in. (25mm)
Filter
L
With O tional
Pl t d
With O tional
Fib l
With
F ihd
L
No
.
cfm L/s
Filter
Furnished Less
Filter
With
O tional
Pleated
Polyester
2 in. (51mm) Filter
With
O tional
Fiberglass
2 in. (51mm)
Filter
With
Furnished
1 in. (25mm)
Filter
Less
Filter
600 285 .13 (32) .05 (12) .21 (52) .09 (22) .12 (30) .07 (17)
024 800 380 .15 (37) .05 (12) .27 (67) .13 (32) .18 (45) .10 (25)
024
030
036
1000 470 .18 (45) .06 (15) .34 (85) .18 (45) .26 (65) .15 (37)
030
036 1200 565 .21 (52) .09 (22) .42 (104) .24 (60) .35 (87) .21 (52)
1400 660 .25 (62) .15 (37) .51 (127) .31 (77) .46 (114) .29 (72)
042
1600 755 .15 (37) .05 (12) .40 (99) .27 (67) .30 (75) .17 (42)
042
048
1800 850 .17 (42) .06 (15) .48 (119) .33 (82) .35 (87) .19 (47)
048
060 2000 945 .20 (50) .08 (20) .56 (139) .39 (97) .40 (99) .22 (55)
060
2200 1040 .23 (57) .10 (25) .66 (164) .46 (114) .47 (117) .26 (65)
DIFFUSER AIR RESISTANCE CHA/CHP16/20
Unit
Air Total Air Resistance Ċ inches water gauge (Pa)
U
n
it
Model
N
Air
Volume RTD9Ć65 Diffuser FD9Ć65
Model
No. cfm L/s 2 Ends O en 1 Side 2 Ends O en All Ends & Sides O en
FD9Ć65
Diffuser
600 285 .12 (30) .11 (27) .08 (20) .08 (20)
024 800 380 .15 (37) .13 (32) .11 (27) .11 (27)
024
030
036
1000 470 .19 (47) .16 (40) .14 (35) .14 (35)
030
036 1200 565 .25 (62) .20 (50) .17 (42) .17 (42)
1400 660 .33 (82) .26 (65) .20 (50) .20 (50)
o42
1600 755 .43 (107) .32 (80) .20 (50) .24 (60)
o42
048
1800 850 .56 (139) .40 (90) .30 (75) .30 (75)
048
060 2000 945 .73 (182) .50 (124) .36 (90) .36 (90)
060
2200 1040 .95 (236) .63 (157) .44 (109) .44 (109)
WET INDOOR COIL AIR RESISTANCE CHA16
Model Number
Air Volume Air Resistance
M
o
d
e
l
N
um
b
er cfm L/s in. w.g. Pa
600 285 0.05 12
CHA16 024
800 380 0.06 15
CHA16-024 1000 470 0.07 17
1200 565 0.08 20
800 380 0.09 22
CHA16-030 1000 470 0.10 25
CHA16 030
1200 565 0.11 27
800 380 0.09 22
CHA16 036
1000 470 0.10 25
CHA16-036 1200 565 0.11 27
1400 660 0.12 30
1600 755 0.11 27
CHA16 048
1800 850 0.12 30
CHA16-048 2000 945 0.13 32
2200 1040 0.14 35
1600 755 0.08 20
CHA16 060
1800 850 0.09 22
CHA16-060 2000 945 0.10 25
2200 1040 0.11 27
CEILING DIFFUSER AIR THROW DATA CHA16 CHP16/20
Model No. RTD9-65 FD9-65
Air Volume Effective Throw Effective Throw Ċ ft.
(m)
cfm L/s ft. m ft. m
1000 470 10-17 3-5 15-20 5-6
1200 565 11-18 3-5 16-22 5-7
1400 660 12-19 4-6 17-24 5-7
1600 755 12-20 4-6 18-25 5-8
1800 850 13-21 4-6 20-28 6-9
2000 945 14-23 4-7 21-29 6-9
2200 1040 16-25 5-8 22-30 7-9
Effective throw based on terminal velocities of 75 ft. (22.9 m) per minute.
WET INDOOR COIL AIR RESISTANCE CHP16/20
Model Number
Air Volume Air Resistance
M
o
d
e
l
N
um
b
er cfm L/s in. w.g. Pa
600 285 0.05 12
CHP16/20-024 800 380 0.06 15
CHP16/20 024
1000 470 0.07 17
800 380 0.09 22
CHP16/20-030 1000 470 0.10 25
CHP16/20 030
1200 565 0.11 27
800 380 0.07 17
CHP16/20 036
1000 470 0.08 20
CHP16/20-036 1200 565 0.09 22
1400 660 0.10 25
1400 660 0.12 30
CHP20 042
1600 755 0.13 32
CHP20--042
CHP16/20
-
048
1800 850 0.14 35
CHP16/20
-
048
2000 945 0.15 37
2200 1040 0.16 40
1600 755 0.11 27
CHP16/20 060
1800 850 0.12 30
CHP16/20-060 2000 945 0.13 32
2200 1040 0.14 35

Pa e 17
FIGURE 1
CHA/CHP16, CHP20 PARTS ARRANGEMENT
(shown with scroll com ressor)
CONDENSER FAN
BLOWER ASSEMBLY
COMPRESSOR
CONTROL BOX
ELECTRICHEAT
ELEMENT
FIGURE 2
CHA/CHP16, CHP20 CONTROL BOX
CMCI DEFROST
CONTROL
TRANSFORMER
T1
TERMINAL STRIP
TB32
COMPRESSOR
CONTACTOR K1
HARD START RELAY K31
CHA/CHP16-024/030
TRANSFORMER T4
(042, 048, 060)
LATCH RELAY
K6
CAPACITOR C1
CHP20-036, -060 G,J,M VOLTS
CHA/CHP16-036 G, J, M VOLTS
CAPACITOR C12
ALL P VOLT UNITS
CAPACITOR C1
CHP16/20-048-G. J, M, VOLTS
CHP16-060-G, J, M, VOLTS
INBLOOR BLOWER
CONTACTOR K3
DEFROST
RELAY
K4
OUTDOOR
FAN RELAY
K10
TRANSFER
REALY
K8
ALL Y VOLTAGE UNITS
CAPACITOR C7
CHA/CHP16-024/030
TRANSFORMER T4
(024, 030, 036)

Pa e 18
I-APPLICATION
CHA/CHP16/20 2, 2 1/2 and 3 ton units are in the one cabiĆ
net size. CHA/CHP16/20 3.5, 4 and 5 ton units are also one
in one cabinet size. All CHA/CHP16/20 model units are apĆ
plicable for commercial, sin le or three phase installations.
CHA/CHP16/20 models are factory equipped with the hardĆ
ware required for installin Lennox' optional thermostat conĆ
trol systems like the T7300 or T8600 (refer to the En ineerĆ
in Handbook for more specific application data).
II-UNIT COMPONENTS
CHA/CHP16/20 unit components are shown in fi ure 1.
A-Control Box Com onents
CHA/CHP16/20 control box is shown in fi ure 2. The control
box is located adjacent to the compressor compartment, beĆ
hind the control box access panel in front of the unit.
The condenser fan can be accessed by removin the fan
rill located on top of the unit.
The indoor blower access panel (all units) is located on the
opposite side of the unit from the heatin compartment acĆ
cess.
1-Transformer T1
All CHA/CHP16/20 series units use a sin le line volta e to
24VAC transformer mounted in the control box. The transĆ
former supplies power to control circuits in the unit. TransĆ
formers are rated at 70VA and use two primary volta e taps
as shown in fi ure 3. T1 is protected by a 3.5 amp circuit
breaker (CB8).
BLUE
YELLOW
ORANGE
RED
BLACK
240 VOLTS
208 VOLTS
PRIMARY SECONDARY
208 / 240 VOLT TRANSFORMER
FIGURE 3
24 VOLTS
2-Cooling Contactor K1
K1 is a 24V to line volta e contactor used to ener ize the
compressor and condenser fan in response to thermostat
demand. Three-phase units use three-pole double-break
contactors. Sin le-phase units use sin le-pole contactors.
DANGER
Single - hase units use single
ole contactors. One leg of comĆ
ressor, ca acitor and condensĆ
er fan are connected to line voltĆ
age at all times.
Remove all ower to disconnect
before servicing.
Electrical shock resulting in
death or injury may result if
ower is not disconnected.
NOTE-Contactor K1 is energized by the thermostat
control system. Depending on the control system
installed, the contactor may or may not be immediately
energized upon demand.
3-Indoor Blower Relay K3 (Cooling S eed)
208/230 volt units use a sin le DPDT relay to ener ize the
indoor blower motor. 460 volt and 575 volt units use a sin le
3PDT relay.
CHP16/20 units (singleĆ hase and threeĆ hase) use a
conventional 2 heat / 2 cool thermostat. Transfer relay
K8 is used to direct power to blower relay K3 dependin on
whether the unit is in coolin or heatin mode. In coolin
mode transfer relay K8 is deĆener ized and blower relay K3
is ener ized by thermostat terminal G throu h K8Ć1 normalĆ
ly closed contacts. In heatin mode transfer relay K8 is enĆ
er ized and blower relay K3 is ener ized directly by transĆ
former T1 throu h K8Ć1 normally open contacts.
460 (G) volta e units use a unique blower motor which reĆ
quires the 3PDT relay. The motor utilizes the extra set of
N.C. relay contacts to complete an internal circuit when the
motor is on heatin speed. Refer to the blower motor section
of this manual for more information.
4-Defrost Relay K4 (CHP Models Only)
Relay K4 initiates defrost in response to demand. K4 is enĆ
er ized when defrost thermostat S6 closes and defrost conĆ
trol CMC1 calls for defrost. Once ener ized, contacts K4Ć1
open to reset the internal timer to zero, contacts K4Ć2 close
to ener ize the electric heat (if installed) and K4Ć3 closes to
latch condenser fan relay K10 and defrost relay K4 throu h
defrost cycle.

LATCH RELAY K6
14
568
9
10
12
13 14
FIGURE 4
SET
RESET
Pa e 19
5-Start Ca acitor C7
Compressor start capacitor C7 is used in CHA/
CHP16-024/030 units only, and located in the compressor
compartment. C7 is connected in parallel with capacitor
(C12). The capacitor is ener ized durin compressor startĆ
up and is switched off by potential relay K31 when the comĆ
pressor nears full speed. See side of capacitor for ratin s.
The start capacitor uses a 15K ohm 2 watt bleed" resistor
connected in parallel with the capacitor terminals. The resisĆ
tor is used to slowly dischar e the capacitor when not in use.
6-Dual Ca acitor C12
Sin le phase CHA/CHP16/20 model units use a sin le
dual" capacitor, connected to both the fan motor and the
compressor. A dual capacitor is two independent capacitors
inside one can. Each side of the capacitor has different ratĆ
in s and will be printed on the side.The capacitor is located
inside the compressor compartment.
7-Condenser Fan Relay K10
Condenser fan relay K10, used in all CHP16/20 units, is a
DPDT relay with a 24V coil. In all units K10 de-ener izes conĆ
denser fan B4 in response to defrost demand.
8-Latch Relay K6
CHP16/20 commercial units are desi ned to use convenĆ
tional heat/cool thermostats and are equipped with latch
relay K6. Latch relay K6 is used in commercial heat pumps
to control operation of the reversin valves when a heat/cool
thermostat is used.
CHP16/20 series units are plumbed so that the unit is in coolĆ
in mode when the reversin valve is ener ized. Latch relay
K6 controls operation of the reversin valves and is controlled
by the indoor thermostat.
A latch relay (fi ure 4) is a special type of relay with two coils;
a SET" coil and a RESET" coil. When 24VAC is applied to
the SET" coil, the normally open contacts close and the norĆ
mally closed contacts open. When power is removed from
the SET" coil, nothin happens; the N.O. contacts remain
closed and the N.C. contacts remain open. The contacts do
not return to their normal position until the RESET" coil is
ener ized. Once the contacts are reset, they remain in their
normal position when power is removed.
CHP16/20 series units use a
DPDT latch relay. One set of
normally open contacts is conĆ
nected in series with thermostat
Y1 and compressor contactor
K1 while the matchin normally
closed contacts are connected
in series with thermostat W1
and compressor contactor K1.
The other set of normally open
contacts is connected in series
with the reversin valve. When
the SET" coil is ener ized (Y1),
the normally open contacts
close to ener ize the reversin
valve (thereby placin the unit in
coolin mode) and to ener ize
the compressor contactor.
When power is removed from the SET" coil (such as when
coolin demand is satisfied), the normally open contacts remain
closed, the reversin valve remains ener ized and the unit reĆ
mains in coolin mode.
9-Transfer Relay K8
The combined operation of latch relay K6 and transfer relay
K8 allow the CHP16 to use a conventional heat/cool thermoĆ
stat as opposed to a heat pump thermostat. Transfer relay
K8 switches thermostat blower demand from coolin mode
to heatin mode. Relay K8 routes blower demand from the
appropriate thermostat output to the blower relay dependin
on whether the unit is in coolin or heatin mode.
Durin coolin mode, the blower relay receives power from
thermostat terminal G (relay K8 deĆener ized). Durin
heatin demand transfer relay K8 is ener ized. When K8 is
ener ized, power routin is switched so that the blower
relay receives power from heatin thermostat demand
(W1).
10-Potential Relay K31
Relay K31 is used in the CHA/CHP16-024/030 models ONLY
and is located in the control box. It is a potential relay which
controls the operation of the compressor startin circuit. The
relay is normally closed when the compressor (contactor K1)
is de-ener ized. Capacitor (C7) is connected to a set of norĆ
mally closed K31 contacts and assists the compressor in
startin . When K1 ener izes, the compressor immediately beĆ
ins startĆup. K31 remains de-ener ized durin compressor
start-up and the start capacitor (C7) remains in the circuit. As
the compressor ains speed K31 is ener ized by electromoĆ
tive forces enerated by the compressor. When K31 enerĆ
izes, its contacts open to take the start capacitor out of the
circuit.

Pa e 20
11-Defrost Control CMC1
The CMC1 defrost control (fi ure 5 ) is a solid state control
which provides automatic switchin from normal heatin operaĆ
tion to defrost mode and back. The control provides maximum
14 minute defrost periods at 30, 60 or 90Ćminute fieldĆchan eĆ
able intervals. Each control monitors thermostat demand and
holds" the timer in place between thermostat demand. A set of
dia nostic pins are also provided for troubleshootin the refri Ć
eration circuit.
The control contains a solid state timer which switches an exĆ
ternal defrost relay throu h 1/4" male spades mounted on the
control's circuit board. The control ener izes the defrost relay
at re ular timed intervals. Defrost thermostat S6 initiates deĆ
frost and pressure switch S46 terminates defrost. If S46 does
not terminate defrost, CMC1 will terminate defrost after 14
minutes.
SOLID STATE DEFROST TIMER
TIMING JUMPER
TIMING PINS
TROUBLESHOOTING
PINS CONTROL
TERMINALS
FIGURE 5
When the indoor thermostat closes (call for heat or cool), deĆ
frost timer initiates 30, 60 or 90Ćminute (dependin on how the
control is preset) timin sequence. At the end of the timin seĆ
quence, the control attempts to ener ize the defrost relay. If
both defrost thermostat and defrost pressure switch are
closed when timin sequence ends, the defrost relay is enerĆ
ized and defrost be ins. Consequently, the defrost pressure
switch must open in order for defrost to be terminated (defrost
can also be terminated by the internal timer of the defrost conĆ
trol).
Defrost Control Com onents
a- Timing Pins 30(T1), 60(T2), 90(T3)
Each of these pins provides different timed interval beĆ
tween defrosts. A jumper connects the pins to circuit
board pin W1. Table 1 shows the timin s of each pin.
The defrost interval can be field chan ed to 30, 60 or 90
minutes. The defrost period (14 minutes) cannot be
chan ed. To chan e the interval between defrosts, simĆ
ply remove the jumper from the pin it is connected to and
reconnect the jumper to one of the other available pins
(see fi ure 6).
NEEDLE-NOSE
PLIERS
TO CHANGE CONTROL TIMINGS:
1- Turn off all power to the unit to avoid dama in the circuit board.
2- Grasp wire connector firmly with needle nose pliers as shown.
3- ently pull connector from pin.
4- Select new timin pin. DO NOT SELECT A TST" PIN.
5- Gently push connector onto desired pin (see Table 1 for timin s).
Connector is seated when pin snaps.
6- Turn on power to unit.
IMPORTANT
Prevent control damage. Do not connect timing
jum er to either TST" in.
Prevent control damage. Avoid contact with other
control terminals or control com onents.
IMPORTANT
FI
GU
RE
6
b- Timing Jum er
A timin jumper is factory installed on the circuit board
and is used to connect pin W1 to one of three timin
pins. The jumper may be connected to any one timin
pin but must never be connected to the TST" pins. See
followin Caution.
IMPORTANT
Potential for control damage.
Do not connect timing jum er to TST" ins.
TST" ins are used only during a test and must
not connect with timing ins.
TABLE 1
DEFROST
CONTROL CMC
TIMINGS
INTERVAL BETWEEN
JUMPER CONNECTED TO: DEFROST
TIME
30 (T1) 60 (T2) 90 (T3)
NORMAL
OPERATION
TST" PINS
JUMPERED
30 + 3 60 + 6 90 + 9 14 + 1.4
7 + 0.7 14 + 1.4 21 + 2.1 3.3 + 0.3
MIN. MIN. MIN. MIN.
SEC. SEC. SEC. SEC.
TOGETHER
DEFROSTS WITH
c- 24V" Terminal
Terminal 24V" receives 24VAC from the control transĆ
former. This terminal powers the control's internal timer
and relays. Terminal 24V" must be powered at all times
in order to provide HOLD" between thermostat deĆ
mands.