ALLIED COMMERCIAL GCS16 Series Service manual

Service Literature
GCS16 series units in the 15 and 20 ton (52.8 and 70.3
kW) cooling sizes are packaged combination gas heat/
dx cool units designed for commercial applications. Gas
heat exchanger in 235,000 and 375,000 (68.9 and
109.9 kW) Btuh input sizes. Optional electric heat
sections with inputs of 15 to 75 kW are available in the
CHA16 series units and install inside the cabinet.
GCS/CHA16-180 units utilize reciprocating compres-
sors. Thse compressors are hermeticaly sealed for leak
free opration and long service life. A built in protection
device assures protection from excessive current and
temperatures.
GCS/CHA16-240 units utilize scroll compressors. The
scroll compressor offers high volumetric efficiency and
quiet operation. Continuous flank contact, maintained
by centrifugal force, minimizes gas leakage and maxi-
mizes efficiency. The motor is internally protected from
excessive current and temperature.
GCS/CHA16-180/240 units are designed for horizontal
or down flow discharge application and may be fitted
with RMF16 mounting frame, REMD16 economizer and
RTD11 ceiling diffuser.
GCS/CHA16-180/240 are designed to accept any of
several different thermostat control systems such as the
Honeywell T7300 or Honeywell T8621D with minimum
field wiring. Control options such as economizer and
warm up kit, connect to the unit with jack-plugs. When
plugged in the controls become an integral part of the
unit wiring. Units are also equipped with low voltage pig
tails to facilitate thermostat field wiring.
Information in this manual is for use by a qualified
service technician only. All specifications are subject to
change. Procedures outlined in this manual are repre-
sented as a recommendation only and do not super-
sede or replace local or state codes.
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life. Installa-
tion and service must be performend by a
qualified installer or service agency.
WARNING
Refrigerant can be harmful if it is inhaled.
Refrigerant must be used and recovered re-
sponsibly.
Failure to follow this warning may result in
personal injury or death.
Page 1
GCS/CHA16
15 and 20 Ton
(52.8 and 70.3 kW)
Table of Contents
GENERAL .......................................................Page1
SPECIFICATIONS............................................Page2
HIGHALTITUDE...............................................Page3
ELECTRICALDATA........................................Page4
BLOWERDATA...............................................Page4
OPTIONALACCESSORIES............................Page10
PARTSARRANGEMENT.................................Page12
IAPPLICATION................................................Page14
IIUNITCOMPONENTS....................................Page14
III OPTIONAL ELECTRIC HEAT.......................Page 25
IV PLACEMENT AND INSTALLATION.............Page 30
VELECTRICAL CONNECTIONS.....................Page 30
VI INDOOR BLOWER OPERATION.................Page 30
VIISTARTUP....................................................Page31
VIII REFRIGERATION SERVICE CHECKS......Page 32
IX HEATING SERVICE CHECKS......................Page 33
XMAINTENANCE.............................................Page35
XIACCESSORIES.............................................Page37
XII WIRING AND OPERATION SEQUENCE....Page 41

Page 2
SPECIFICATIONS
Model No. GCS/CHA16-180 GCS/CHA16Ć240
Nominal Tonnage 15 20
Gross cooling capacity - Btuh (kW) 1 3,200 (53.7) 226,600 (66.4)
Cooling
LTotal cooling capacity - Btuh (kW) 176,000 (51.6) 216,000 (63.3)
Cooling
Ratings
LTotal unit kW 19.5 24.0
Ratings
LEER (Btuh/Watts) 9.0 9.0
LIntegrated Part Load Value 9.2 9.2
Refrigerant
Ch
Circuit 1 7 lbs. oz. (3.40 kg) lbs. oz. (3. 6 kg)
g
Charge
Furnished
Circuit 2 7 lbs. oz. (3.40 kg) lbs. oz. (3. 6 kg)
F
urn
i
s
h
e
d
(HCFCĆ22) Circuit 3 7 lbs. oz. (3.40 kg) lbs. oz. (3. 6 kg)
Blower wheel nominal diameter x width - in. (mm) 1 x 1 (457 x 457)
3 hp Nominal motor hp (kW) 3 (2.24) - - - -
3
hp
Motor and
Factory
Maximum usable hp (kW) 3.45 (2.57) - - - -
Factory
Installed Voltage & phase 20 /230/460v or 575vĆ3ph - - - -
Evaporator
Installed
Drives RPM range 645- 45 - - - -
Evaporator
Blower
5 hp Nominal motor hp (kW) 5 (3.73)
Blower
and
Di
5
hp
Motor and
Factory
Maximum usable hp (kW) 5.75 (4.29)
and
Drive
Selection
Factory
Installed Voltage & phase 20 /230/460v or 575vĆ3ph
S
e
l
ec
ti
on
Installed
Drives RPM range 765-965
7.5 h
p
Nominal motor hp (kW) - - - - 7.5 (5.60)
7
.
5
hp
Motor and
Factory
Maximum usable hp (kW) - - - - .6 (6.42)
Factory
Installed Voltage & phase - - - - 20 /230/460v or 575vĆ3ph
Installed
Drives RPM range - - - - 95-1120
Net face area - sq. ft. (m2)17.9 (1.66)
Evaporator
Tube diameter - in. (mm) & No. of rows 3/ (9.5) - 3 3/ (9.5) - 4
Evaporator
Coil
Fins per inch (m) 14 (551)
Coil
Expansion device type Thermostatic Expansion Valve
Drain connection size mpt - in. (mm) 1 (25.4)
Condenser
Net face area - sq. ft. (m2)29.5 (2.74)
Condenser
Coil
Tube diameter - in. (mm) & No. of rows 3/ (9.5) - 2
Coil
Fins per inch (m) 20 (7 7)
Diameter - in. (mm) & No. of blades (2) 24 (610) - 4 (2) 26 (660) - 4
Condenser
Air volume - cfm (L/s) 10,000 (4720) 13,500 (6370)
Condenser
Fans
Motor horsepower (W) 3/4 (560) 1 (746)
Fans
Motor rpm 1075 1140
Motor watts 1200 2050
Low fire input - Btuh (kW) Natural Gas / LPG/Propane 154,000 (45.1) Nat. / 170,000 (49. ) LPG/Propane
-235
Heat
Input - Btuh (kW) Natural Gas / LPG/Propane 235,000 (6 .9)
Heat
Models Output - Btuh (kW) Natural Gas / LPG/Propane 1 ,000 (55.1 ) Nat. / 191,000 (56.0) LPG/Propane
Models
CSA Thermal Efficiency Natural Gas / LPG/Propane 0.0% Nat. / 1.3% LPG/Propane
Low fire input - Btuh (kW) Natural Gas / LPG/Propane 246,000 (72.1) Nat. / 271,000 (79.4) LPG/Propane
-375
Heat
Input - Btuh (kW) Natural Gas / LPG/Propane 375,000 (109.9)
Heat
Models Output - Btuh (kW) Natural Gas / LPG/Propane 300,000 ( 7.9) Nat. / 305,000 ( 9.4) LPG/Propane
Models
CSA Thermal Efficiency Natural Gas / LPG/Propane 0.0% Nat. / 1.3% LPG/Propane
Gas Supply Connections fpt - in. (mm)Natural and LPG/Propane 3/4
Recommended Gas
Supply Pressure
Natural 7 (1.7)
Supply Pressure
- wc. in. (kPa) LPG/Propane 11 (2.7)
Filters Type of filter Disposable, pleated
Filters
(furnished) No. & size - in. (mm) (6) 1 x 24 x 2 (457 x 610 x 51)
Net weight of basic unit - lbs. (kg) 1700 (771) 1 25 ( 2 )
Shipping weight of basic unit - lbs. (kg) (1 Package) 1 70 ( 4 ) 1990 (903)
Electrical characteristics 20 /230v, 460v or 575v - 60 hertz - 3 phase
LRated in accordance with ARI Standard 340/360;
95_F (35_F) outdoor air temperature and 0_F (27_C) db/67_F (19_C) wb entering evaporator air.
NOTE - Integrated Part Load Value rated at 0_F (27_C) outdoor air temperature.
NOTE - ARI capacity is net and includes evaporator blower motor heat deduction. Gross capacity does not include evaporator blower motor heat deduction.
Using total air volume and system static pressure requirements determine from blower performance tables rpm and motor output required. Maximum usable output of motors
furnished by Lennox are shown. In Canada, nominal motor output is also maximum usable motor output. If motors of comparable output are used, be sure to keep within the service
factor limitations outlined on the motor nameplate.

Page 3
ELECTRICAL DATA
ModelĂNo. GCS16-180
LineĂvoltageĂdataĂ-Ă60ĂHzĂ-Ă3Ăphase 20 /230V 460V 575V
Compressors (3)
RatedĂloadĂampsĂ-Ăeach (total) 16.7 (50.1) .6 (25. ) 6.0 (1 .1)
C
ompressors
(3)
LockedĂrotorĂampsĂ-Ăeach (total) 110 (330) 55 (165) 44 (132)
Condenser FullĂloadĂamps (total) 7.4 (14. ) 3. (7.6) 3.2 (6.4)
Condenser
FanĂMotors (2) LockedĂrotorĂamps (total) 14.6 (29.2) 7.4 (14. ) 5. (11.6)
Motor Output
hp 3 5 3 5 3 5
Evaporator
Blower
M
otor
O
utput kW 2.2 3.7 2.2 3.7 2.2 3.7
Bl
ower
Motor FullĂloadĂampsĂ 10.6 16.7 4. 7.6 3.9 6.1
Motor
LockedĂrotorĂampsĂ 66 105 26. 45.6 23.4 36.6
"
RecommendedĂmaximum fuseĂor With Exhaust Fans 90 90 45 50 30 35
"Recommended
Ă
maximum
fuse
Ă
or
circuit breaker sizeĂ(am s) Less Exhaust Fans 80 90 45 45 30 35
{Minimum Circuit Am acity
With Exhaust Fans 78 84 40 42 29 31
{Mi
n
i
mumĂ
Ci
rcu
it
Ă
A
m ac
it
yLess Exhaust Fans 73 79 37 40 27 29
O
p
tional (No.) Motor Output - hp (kW) (2) - 1/3
Optional
Power Exhaust
F
FullĂloadĂampsĂ (total) 4. (9.6) 2.6 (5.2) 2 (4)
Fans LockedĂrotorĂamps (total) 9.4 (1 . ) 4. (9.6) 3. (7.6)
ModelĂNo. GCS16-240
LineĂvoltageĂdataĂ-Ă60ĂHzĂ-Ă3Ăphase 20 /230V 460V 575V
Compressors (3)
RatedĂloadĂampsĂ-Ăeach (total) 1 . (56.4) 9.1 (27.3) 7.5 (22.5)
C
ompressors
(3)
LockedĂrotorĂampsĂ-Ăeach (total) 156 (46 ) 70 (210) 54 (162)
Condenser FullĂloadĂamps (total) 9.6 (19.6) 4. (9.6) 4 ( )
Condenser
FanĂMotors (2) LockedĂrotorĂamps (total) 46 (92) 23 (46) 17. (35.6)
Motor Output
hp 5 7.5 5 7.5 5 7.5
Evaporator
Blower
M
otor
O
utput kW 3.7 5.6 3.7 5.6 3.7 5.6
Bl
ower
Motor FullĂloadĂampsĂ 16.7 24.2 7.6 11 6.1 9
Motor
LockedĂrotorĂampsĂ 105 152 45.6 66 36.6 54
"
RecommendedĂmaximum fuseĂor With Exhaust Fans 110 125 50 50 40 45
"Recommended
Ă
maximum
fuse
Ă
or
circuit breaker sizeĂ(am s) Less Exhaust Fans 100 110 50 50 40 45
{Minimum Circuit Am acity
With Exhaust Fans 93 100 45 48 37 40
{Mi
n
i
mumĂ
Ci
rcu
it
Ă
A
m ac
it
yLess Exhaust Fans 88 95 42 46 35 38
O
p
tional (No.) Motor Output - hp (W) (2) - 1/3 (250)
Optional
Power Exhaust
F
FullĂloadĂampsĂ (total) 4. (9.6) 2.6 (5.2) 2 (4)
Fans LockedĂrotorĂamps (total) 9.4 (1 . ) 4. (9.6) 3. (7.6)
{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-ĂExtremesĂofĂoperatingĂrangeĂareĂplusĂandĂminusĂ10Ă%ĂofĂlineĂvoltage.
Model No. CHA16-180 CHA16-240
Line voltage data - 60 Hz - 3 phase 20 /230V 460V 575V 20 /230V 460V 575V
Compressors (3)
Rated load amps each (total) 16.7 (50.1) .6 (25. ) 6.0 (1 .1) 1 . (56.4) 9.1 (27.3) 7.5 (22.5)
C
ompressors
(3)
Locked rotor amps each (total) 110.0 (330.0) 55.0 (165.0) 44.0 (132.0) 156.0 (46 .0) 70.0 (210.0) 54.0 (162.0)
Condenser Fan Full load amps (total) 7.4 (14. ) 3. (7.6) 3.2 (6.4) 9.6 (19.6) 4. (9.6) 4.0 ( .0)
Condenser
Fan
Motor (2) Locked rotor amps (total) 14.6 (29.2) 7.4 (14. ) 5. (11.6) 46 (92) 23 (46) 17. (35.6)
Motor hp 3 5 3 5 3 5 5 7.5 5 7.5 5 7.5
Evaporator Blower
Motor
Output kW 2.2 3.7 2.2 3.7 2.2 3.7 3.7 5.6 3.7 5.6 3.7 5.6
Evaporator
Blower
Motor Full load amps 10.6 16.7 4. 7.6 3.9 6.1 16.7 24.2 7.6 11 6.1 9
Locked rotor amps 66 105 26. 45.6 23.4 36.6 105 152 45.6 66 36.6 54
Rec. max. fuse With Exhaust Fan 90 90 45 50 30 35 110 125 50 50 40 45
Rec.
max.
fuse
size (am s) Less Exhaust Fan 80 90 45 45 30 35 100 110 50 50 40 45
*Minimum Circuit With Exhaust Fan 78 84 40 42 29 31 93 100 45 48 37 40
Minimum
Circuit
Am acity Less Exhaust Fan 73 79 37 40 27 29 88 95 42 46 35 38
Optional Power
(No.) Horsepower (W) (2) - 1/3 (250)
Optional Power
Exhaust Fan
Full load amps (total) 4. (9.6) 2.6 (5.2) 2.0 (4.0) 4. (9.6) 2.6 (5.2) 2.0 (4.0)
Exhaust
Fan
Locked rotor amps (total) 9.4 (1 . ) 4. (9.6) 3. (7.6) 9.4 (1 . ) 4. (9.6) 3. (7.6)

Page 4
BLOWER DATA GCS16-180
GCS16-180 - DOWN-FLOW BLOWER PERFORMANCE (w/ 2 in. leated filters)
Air
STATIC PRESSURE EXTERNAL TO UNIT Ċ Inches Water Gauge (Pa)
Ai
r
Volume .20 (50) .40 (100) .60 (150) .80 (200) 1.00 (250) 1.20 (300) 1.40 (350) 1.60 (400) 1.80 (450) 2.00 (495)
Volume
cfm
(L/s) RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
4 00
(2265)
450 0.90
(0.67)
510 1.10
(0. 2)
575 1.35
(1.01)
630 1.55
(1.16)
6 0 1.75
(1.31)
730 2.00
(1.49)
775 2.25
(1.6 )
20 2.50
(1. 7)
60 2.75
(2.05)
900 3.05
(2.2 )
4900
(2310)
455 0.95
(0.71)
515 1.15
(0. 6)
5 0 1.40
(1.04)
635 1.60
(1.19)
6 5 1. 5
(1.3 )
735 2.10
(1.57)
7 0 2.35
(1.75)
20 2.55
(1.90)
65 2. 5
(2.13)
900 3.10
(2.31)
5000
(2360)
460 1.00
(0.75)
520 1.20
(0.90)
5 5 1.45
(1.0 )
640 1.70
(1.27)
690 1.90
(1.42)
735 2.15
(1.60)
7 0 2.40
(1.79)
25 2.65
(1.9 )
65 2.90
(2.16)
905 3.20
(2.39)
5100
(2405)
465 1.05
(0.7 )
530 1.30
(0.97)
590 1.50
(1.12)
645 1.75
(1.31)
695 2.00
(1.49)
740 2.20
(1.64)
7 5 2.45
(1. 3)
30 2.75
(2.05)
70 3.00
(2.24)
910 3.30
(2.46)
5200
(2455)
470 1.10
(0. 2)
535 1.35
(1.01)
595 1.55
(1.16)
645 1. 0
(1.34)
700 2.05
(1.53)
745 2.30
(1.72)
790 2.55
(1.90)
30 2. 0
(2.09)
70 3.05
(2.2 )
910 3.35
(2.50)
5300
(2500)
475 1.15
(0. 6)
540 1.40
(1.04)
600 1.65
(1.23)
650 1. 5
(1.3 )
700 2.10
(1.57)
750 2.40
(1.79)
795 2.65
(1.9 )
35 2.90
(2.16)
75 3.15
(2.35)
915 3.45
(2.57)
5400
(2550)
4 0 1.20
(0.90)
545 1.45
(1.0 )
605 1.70
(1.27)
655 1.95
(1.45)
705 2.20
(1.64)
755 2.45
(1. 3)
795 2.70
(2.01)
40 3.00
(2.24)
0 3.25
(2.42)
915 3.55
(2.65)
5500
(2595)
490 1.30
(0.97)
550 1.50
(1.12)
610 1.75
(1.31)
660 2.00
(1.49)
710 2.25
(1.6 )
755 2.50
(1. 7)
00 2. 0
(2.09)
40 3.05
(2.2 )
0 3.35
(2.50)
920 3.65
(2.72)
5600
(2645)
495 1.35
(1.01)
555 1.60
(1.19)
615 1. 5
(1.3 )
665 2.10
(1.57)
715 2.35
(1.75)
760 2.60
(1.94)
05 2.90
(2.16)
45 3.15
(2.35)
5 3.45
(2.57)
925 3.75
(2. 0)
5700
(2690)
500 1.40
(1.04)
560 1.65
(1.23)
620 1.90
(1.42)
670 2.15
(1.60)
720 2.45
(1. 3)
765 2.70
(2.01)
10 3.00
(2.24)
50 3.25
(2.42)
90 3.55
(2.65)
925 3. 0
(2. 3)
5 00
(2735)
505 1.45
(1.0 )
570 1.75
(1.31)
625 2.00
(1.49)
675 2.25
(1.6 )
725 2.50
(1. 7)
770 2. 0
(2.09)
10 3.05
(2.2 )
50 3.30
(2.46)
90 3.60
(2.69)
930 3.90
(2.91)
5900
(27 5)
515 1.55
(1.16)
575 1. 0
(1.34)
630 2.05
(1.53)
6 0 2.30
(1.72)
725 2.60
(1.94)
775 2.90
(2.16)
15 3.15
(2.35)
55 3.40
(2.54)
95 3.70
(2.76)
935 4.05
(3.02)
6000
(2 30)
520 1.60
(1.19)
5 0 1. 5
(1.3 )
635 2.15
(1.60)
6 5 2.40
(1.79)
730 2.65
(1.9 )
775 2.95
(2.20)
20 3.25
(2.42)
60 3.55
(2.65)
900 3. 5
(2. 7)
935 4.10
(3.06)
6100
(2 0)
525 1.65
(1.23)
5 5 1.95
(1.45)
640 2.20
(1.64)
690 2.50
(1. 7)
735 2.75
(2.05)
7 0 3.05
(2.2 )
25 3.35
(2.50)
65 3.65
(2.72)
900 3.90
(2.91)
940 4.25
(3.17)
6200
(2925)
530 1.75
(1.31)
590 2.00
(1.49)
645 2.30
(1.72)
695 2.60
(1.94)
740 2. 5
(2.13)
7 5 3.15
(2.35)
30 3.45
(2.57)
70 3.75
(2. 0)
905 4.00
(2.9 )
945 4.35
(3.25)
6300
(2975)
540 1. 5
(1.3 )
595 2.10
(1.57)
650 2.40
(1.79)
700 2.65
(1.9 )
745 2.95
(2.20)
790 3.25
(2.42)
30 3.50
(2.61)
70 3. 0
(2. 3)
910 4.15
(3.10)
945 4.45
(3.32)
6400
(3020)
545 1.90
(1.42)
605 2.20
(1.64)
655 2.45
(1. 3)
705 2.75
(2.05)
750 3.05
(2.2 )
795 3.35
(2.50)
35 3.65
(2.72)
75 3.95
(2.95)
915 4.25
(3.17)
950 4.55
(3.39)
6500
(3065)
550 2.00
(1.49)
610 2.30
(1.72)
660 2.55
(1.90)
710 2. 5
(2.13)
755 3.15
(2.35)
00 3.45
(2.57)
40 3.75
(2. 0)
0 4.05
(3.02)
915 4.35
(3.25)
955 4.70
(3.51)
6600
(3115)
560 2.10
(1.57)
615 2.35
(1.75)
665 2.65
(1.9 )
715 2.95
(2.20)
760 3.25
(2.42)
05 3.55
(2.65)
45 3. 5
(2. 7)
5 4.20
(3.13)
920 4.45
(3.32)
960 4. 0
(3.5 )
6700
(3160)
565 2.15
(1.60)
620 2.45
(1. 3)
670 2.75
(2.05)
720 3.05
(2.2 )
765 3.35
(2.50)
10 3.65
(2.72)
50 4.00
(2.9 )
90 4.30
(3.21)
925 4.60
(3.43)
960 4.90
(3.66)
6 00
(3210)
575 2.25
(1.6 )
625 2.55
(1.90)
6 0 2. 5
(2.13)
725 3.15
(2.35)
770 3.45
(2.57)
15 3. 0
(2. 3)
55 4.10
(3.06)
90 4.40
(3.2 )
930 4.75
(3.54)
965 5.05
(3.77)
6900
(3255)
5 0 2.35
(1.75)
635 2.65
(1.9 )
6 5 2.95
(2.20)
730 3.25
(2.42)
775 3.55
(2.65)
15 3. 5
(2. 7)
55 4.20
(3.13)
95 4.50
(3.36)
935 4. 5
(3.62)
970 5.20
(3. )
7000
(3305)
5 5 2.45
(1. 3)
640 2.75
(2.05)
690 3.05
(2.2 )
735 3.35
(2.50)
7 0 3.70
(2.76)
20 4.00
(2.9 )
60 4.30
(3.21)
900 4.65
(3.47)
935 4.95
(3.69)
975 5.35
(3.99)
7100
(3350)
590 2.50
(1. 7)
645 2. 5
(2.13)
695 3.15
(2.35)
740 3.45
(2.57)
7 5 3. 0
(2. 3)
25 4.10
(3.06)
65 4.45
(3.32)
905 4.75
(3.54)
940 5.10
(3. 0)
975 5.40
(4.03)
7200
(3400)
600 2.65
(1.9 )
650 2.95
(2.20)
700 3.25
(2.42)
745 3.60
(2.69)
790 3.90
(2.91)
30 4.20
(3.13)
70 4.55
(3.39)
910 4.90
(3.66)
945 5.25
(3.92)
9 0 5.55
(4.14)

Page 5
BLOWER DATA CHA16-180
BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL & AIR FILTERS IN PLACE.
FOR ALL UNITS ADD:
1 - Wet indoor coil air resistance of selected unit.
2 - Any field installed accessories air resistance (electric heat, economizer, duct resistance, diffuser, etc.)
Then determine from blower table blower motor output.
MINIMUM AIR VOLUME REQUIRED FOR USE WITH OPTIONAL ELECTRIC HEAT
DUnits require 4900 cfm (2310 L/s) minimum air with electric heat.
BOLD ITALIC INDICATES FIELD FURNISHED DRIVE
Air
STATIC PRESSURE EXTERNAL TO UNIT Ċ Inches Water Gauge (Pa)
Air
Volume
f
.20 (50) .40 (100) .60 (150) .80 (200) 1.00 (250) 1.20 (300) 1.40 (350) 1.60 (400) 1.80 (450) 2.00 (495)
cfm
(L/s) RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
4 00
(2265)
455 0.90
(0. 7)
515 1.10
(0.82)
570 1.25
(0.93)
20 1.45
(1.08)
670 1.70
(1.27)
715 1.90
(1.42)
760 2.10
(1.57)
00 2.35
(1.75)
40 2.55
(1.90)
0 2. 0
(2.09)
4900
(2310)
4 0 0.95
(0.71)
520 1.10
(0.82)
575 1.30
(0.97)
25 1.55
(1.1 )
675 1.75
(1.31)
720 1.95
(1.45)
760 2.15
(1.60)
05 2.40
(1.79)
45 2.65
(1.9 )
0 2. 5
(2.13)
5000
(2360)
470 1.00
(0.75)
525 1.15
(0.8 )
580 1.40
(1.04)
30 1. 0
(1.19)
675 1. 0
(1.34)
720 2.00
(1.49)
765 2.25
(1.6 )
05 2.45
(1. 3)
45 2.70
(2.01)
5 2.95
(2.20)
5100
(2405)
475 1.05
(0.78)
530 1.25
(0.93)
585 1.45
(1.08)
35 1. 5
(1.23)
6 0 1. 5
(1.3 )
725 2.10
(1.57)
770 2.35
(1.75)
10 2.55
(1.90)
50 2. 0
(2.09)
5 3.05
(2.2 )
5200
(2455)
480 1.10
(0.82)
535 1.30
(0.97)
590 1.50
(1.12)
40 1.70
(1.27)
6 5 1.95
(1.45)
730 2.15
(1.60)
775 2.40
(1.79)
15 2.65
(1.9 )
50 2. 5
(2.13)
90 3.15
(2.35)
5300
(2500)
485 1.15
(0.8 )
545 1.35
(1.01)
595 1.55
(1.1 )
645 1. 0
(1.34)
690 2.00
(1.49)
735 2.25
(1.6 )
775 2.45
(1. 3)
15 2.70
(2.01)
55 2.95
(2.20)
90 3.20
(2.39)
5400
(2550)
495 1.20
(0.90)
550 1.40
(1.04)
00 1. 0
(1.19)
650 1. 5
(1.3 )
695 2.05
(1.53)
740 2.30
(1.72)
7 0 2.55
(1.90)
20 2. 0
(2.09)
60 3.05
(2.2 )
95 3.30
(2.46)
5500
(2595)
500 1.25
(0.93)
555 1.45
(1.08)
05 1.70
(1.27)
655 1.90
(1.42)
700 2.15
(1.60)
745 2.40
(1.79)
7 5 2.65
(1.9 )
25 2.90
(2.16)
60 3.10
(2.31)
900 3.40
(2.54)
5600
(2645)
505 1.30
(0.97)
5 0 1.55
(1.1 )
10 1.75
(1.31)
660 2.00
(1.49)
705 2.25
(1.6 )
745 2.45
(1. 3)
790 2.70
(2.01)
30 3.00
(2.24)
65 3.20
(2.39)
900 3.45
(2.57)
5700
(2690)
515 1.40
(1.04)
570 1. 0
(1.19)
20 1.85
(1.38)
665 2.05
(1.53)
710 2.30
(1.72)
750 2.55
(1.90)
790 2. 0
(2.09)
30 3.05
(2.2 )
70 3.30
(2.46)
905 3.55
(2.65)
5 00
(2735)
520 1.45
(1.08)
575 1. 5
(1.23)
25 1.90
(1.42)
670 2.15
(1.60)
715 2.40
(1.79)
755 2.60
(1.94)
795 2. 5
(2.13)
35 3.15
(2.35)
75 3.40
(2.54)
910 3.65
(2.72)
5900
(27 5)
530 1.50
(1.12)
580 1.75
(1.31)
30 2.00
(1.49)
675 2.20
(1.64)
720 2.45
(1. 3)
760 2.70
(2.01)
00 2.95
(2.20)
40 3.25
(2.42)
75 3.50
(2.61)
910 3.75
(2. 0)
6000
(2 30)
535 1. 0
(1.19)
585 1.80
(1.34)
35 2.05
(1.53)
6 0 2.30
(1.72)
725 2.55
(1.90)
765 2. 0
(2.09)
05 3.05
(2.2 )
45 3.35
(2.50)
0 3.60
(2.69)
915 3. 5
(2. 7)
6100
(2 0)
545 1. 5
(1.23)
595 1.90
(1.42)
40 2.15
(1. 0)
6 5 2.40
(1.79)
730 2.65
(1.9 )
770 2.90
(2.16)
10 3.15
(2.35)
45 3.40
(2.54)
5 3.70
(2.76)
920 3.95
(2.95)
6300
(2975)
5 0 1.80
(1.34)
05 2.05
(1.53)
655 2.30
(1.72)
695 2.55
(1.90)
740 2. 0
(2.09)
7 0 3.10
(2.31)
20 3.35
(2.50)
55 3.60
(2.69)
90 3.90
(2.91)
925 4.15
(3.10)
6200
(2925)
550 1.75
(1.31)
00 1.95
(1.45)
645 2.20
(1.64)
690 2.45
(1. 3)
735 2.75
(2.05)
775 3.00
(2.24)
15 3.25
(2.42)
50 3.50
(2.61)
90 3. 0
(2. 3)
925 4.10
(3.06)
6400
(3020)
5 5 1.90
(1.42)
15 2.15
(1. 0)
660 2.40
(1.79)
705 2.65
(1.9 )
745 2.90
(2.16)
7 5 3.20
(2.39)
25 3.45
(2.57)
60 3.70
(2.76)
95 4.00
(2.9 )
930 4.30
(3.21)
6500
(3065)
570 1.95
(1.45)
20 2.20
(1. 4)
665 2.50
(1. 7)
710 2.75
(2.05)
750 3.00
(2.24)
790 3.30
(2.46)
30 3.55
(2.65)
65 3. 5
(2. 7)
900 4.10
(3.06)
935 4.40
(3.2 )
6600
(3115)
580 2.05
(1.53)
25 2.30
(1.72)
670 2.55
(1.90)
715 2. 5
(2.13)
755 3.10
(2.31)
795 3.40
(2.54)
30 3.65
(2.72)
70 3.95
(2.95)
905 4.25
(3.17)
940 4.55
(3.39)
6700
(3160)
585 2.15
(1. 0)
35 2.40
(1.79)
6 0 2.70
(2.01)
720 2.95
(2.20)
760 3.20
(2.39)
00 3.50
(2.61)
35 3.75
(2. 0)
75 4.05
(3.02)
910 4.35
(3.25)
945 4.65
(3.47)
6 00
(3210)
595 2.25
(1. 8)
40 2.50
(1.87)
6 5 2.75
(2.05)
725 3.05
(2.2 )
765 3.30
(2.46)
05 3.60
(2.69)
40 3. 5
(2. 7)
0 4.20
(3.13)
915 4.50
(3.36)
945 4.75
(3.54)
6900
(3255)
00 2.30
(1.72)
645 2.55
(1.90)
690 2. 5
(2.13)
730 3.10
(2.31)
770 3.40
(2.54)
10 3.70
(2.76)
45 3.95
(2.95)
5 4.30
(3.21)
915 4.55
(3.39)
950 4. 5
(3.62)
7000
(3305)
10 2.40
(1.79)
655 2.70
(2.01)
695 2.95
(2.20)
740 3.25
(2.42)
775 3.50
(2.61)
15 3. 0
(2. 3)
50 4.10
(3.06)
5 4.40
(3.2 )
920 4.70
(3.51)
955 5.00
(3.73)
7100
(3350)
15 2.50
(1.87)
660 2. 0
(2.09)
705 3.10
(2.31)
745 3.35
(2.50)
7 5 3.65
(2.72)
20 3.95
(2.95)
55 4.20
(3.13)
90 4.50
(3.36)
925 4. 0
(3.5 )
960 5.15
(3. 4)
7200
(3400)
25 2. 0
(1.94)
665 2. 5
(2.13)
710 3.20
(2.39)
750 3.45
(2.57)
790 3.75
(2. 0)
25 4.05
(3.02)
60 4.35
(3.25)
95 4.65
(3.47)
930 4.95
(3.69)
965 5.30
(3.95)

Page 6
BLOWER DATA GCS16-240
BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL & AIR FILTERS IN PLACE.
FOR ALL UNITS ADD:
1 - Wet indoor coil air resistance of selected unit.
2 - Any field installed accessories air resistance (economizer, duct resistance, diffuser, etc.)
Then determine from blower table blower motor output.
BOLD ITALIC INDICATES FIELD FURNISHED DRIVE
Air STATIC PRESSURE EXTERNAL TO UNIT Ċ Inches Water Gauge (Pa)
Air
Volume
f
.20 (50) .40 (100) .60 (150) .80 (200) 1.00 (250) 1.20 (300) 1.40 (350) 1.60 (400) 1.80 (450) 2.00 (495)
Volume
cfm
(L/s) RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
6000
(2 30)
5 5 1. 5
(1.23)
20 1.95
(1.45)
70 2.20
(1. 4)
720 2.50
(1.87)
765 2.75
(2.05)
10 3.05
(2.2 )
50 3.35
(2.50)
90 3.65
(2.72)
930 3.95
(2.95)
965 4.25
(3.17)
6100
(2 0)
575 1.75
(1.31)
25 2.00
(1.49)
75 2.25
(1. 8)
725 2.55
(1.90)
770 2. 5
(2.13)
15 3.15
(2.35)
55 3.45
(2.57)
95 3.75
(2. 0)
930 4.05
(3.02)
970 4.40
(3.2 )
6200
(2925)
580 1.80
(1.34)
35 2.10
(1.57)
85 2.40
(1.79)
730 2. 5
(1.98)
775 2.95
(2.20)
20 3.25
(2.42)
60 3.55
(2.65)
900 3. 5
(2. 7)
935 4.15
(3.10)
975 4.50
(3.36)
6300
(2975)
590 1.90
(1.42)
40 2.20
(1. 4)
90 2.45
(1.83)
735 2.75
(2.05)
7 0 3.05
(2.2 )
25 3.35
(2.50)
65 3.65
(2.72)
900 3.95
(2.95)
940 4.25
(3.17)
975 4.60
(3.43)
6400
(3020)
595 2.00
(1.49)
50 2.30
(1.72)
95 2.55
(1.90)
740 2.85
(2.13)
7 5 3.15
(2.35)
30 3.45
(2.57)
70 3.75
(2. 0)
905 4.05
(3.02)
945 4.40
(3.2 )
9 0 4.70
(3.51)
6500
(3065)
05 2.10
(1.57)
55 2.35
(1.75)
700 2. 5
(1.98)
750 2.95
(2.20)
790 3.25
(2.42)
35 3.55
(2.65)
75 3. 5
(2. 7)
910 4.15
(3.10)
950 4.50
(3.36)
9 5 4. 5
(3.62)
6600
(3115)
10 2.15
(1. 0)
0 2.45
(1.83)
710 2.75
(2.05)
755 3.05
(2.28)
795 3.35
(2.50)
40 3.65
(2.72)
0 4.00
(2.9 )
915 4.30
(3.21)
955 4.65
(3.47)
990 4.95
(3.69)
6700
(3160)
20 2.25
(1. 8)
70 2.55
(1.90)
715 2.85
(2.13)
7 0 3.15
(2.35)
05 3.45
(2.57)
45 3.75
(2. 0)
5 4.10
(3.06)
920 4.40
(3.2 )
960 4.75
(3.54)
995 5.10
(3. 0)
6 00
(3210)
30 2.35
(1.75)
75 2. 5
(1.98)
720 2.95
(2.20)
765 3.25
(2.42)
10 3.55
(2.65)
50 3.90
(2.91)
90 4.20
(3.13)
925 4.50
(3.36)
965 4.90
(3.66)
1000 5.25
(3.92)
6900
(3255)
35 2.45
(1.83)
85 2.75
(2.05)
730 3.05
(2.28)
770 3.35
(2.50)
15 3.70
(2.76)
55 4.00
(2.9 )
95 4.35
(3.25)
930 4.65
(3.47)
965 4.95
(3.69)
1005 5.35
(3.99)
7000
(3305)
45 2.55
(1.90)
90 2.85
(2.13)
735 3.15
(2.35)
7 0 3.50
(2.61)
20 3. 0
(2. 3)
60 4.10
(3.06)
900 4.45
(3.32)
935 4.75
(3.54)
970 5.10
(3. 0)
1005 5.45
(4.07)
7100
(3350)
50 2. 5
(1.98)
700 2.95
(2.20)
740 3.25
(2.42)
7 5 3.60
(2.69)
25 3.90
(2.91)
65 4.25
(3.17)
905 4.60
(3.43)
940 4.90
(3.66)
975 5.25
(3.92)
1010 5.60
(4.1 )
7200
(3400)
0 2.75
(2.05)
705 3.05
(2.28)
750 3.40
(2.54)
790 3.70
(2.76)
30 4.00
(2.9 )
70 4.35
(3.25)
910 4.70
(3.51)
945 5.05
(3.77)
9 0 5.35
(3.99)
1015 5.75
(4.29)
7300
(3445)
5 2.85
(2.13)
710 3.15
(2.35)
755 3.50
(2. 1)
00 3. 5
(2. 7)
40 4.15
(3.10)
75 4.45
(3.32)
915 4. 5
(3.62)
950 5.15
(3. 4)
9 5 5.50
(4.10)
1020 5.90
(4.40)
7400
(3490)
75 3.00
(2.24)
720 3.30
(2.4 )
765 3.65
(2.72)
05 3.95
(2.95)
45 4.30
(3.21)
5 4.65
(3.47)
920 4.95
(3.69)
955 5.30
(3.95)
990 5.65
(4.21)
1025 6.00
(4.4 )
7500
(3540)
80 3.05
(2.28)
725 3.40
(2.54)
770 3.75
(2. 0)
10 4.05
(3.02)
50 4.40
(3.2 )
90 4.75
(3.54)
925 5.10
(3. 0)
960 5.45
(4.07)
995 5. 0
(4.33)
1030 6.15
(4.59)
7600
(35 5)
90 3.20
(2.39)
735 3.55
(2. 5)
775 3. 5
(2. 7)
20 4.20
(3.13)
55 4.50
(3.36)
95 4.90
(3.66)
930 5.20
(3. )
965 5.55
(4.14)
1000 5.95
(4.44)
1035 6.35
(4.74)
7700
(3635)
700 3.35
(2.50)
740 3. 5
(2.72)
7 5 4.00
(2.9 )
25 4.35
(3.25)
65 4.70
(3.51)
900 5.00
(3.73)
935 5.35
(3.99)
970 5.70
(4.25)
1005 6.10
(4.55)
1040 6.50
(4. 5)
7 00
(36 0)
705 3.45
(2.57)
750 3.80
(2.83)
790 4.10
(3.06)
30 4.45
(3.32)
70 4. 0
(3.5 )
905 5.15
(3. 4)
945 5.55
(4.14)
9 0 5.90
(4.40)
1010 6.25
(4.66)
1045 6.65
(4.96)
7900
(3730)
715 3. 0
(2. 9)
755 3.90
(2.91)
00 4.25
(3.17)
35 4.60
(3.43)
75 4.95
(3.69)
910 5.30
(3.95)
950 5.70
(4.25)
9 5 6.05
(4.51)
1015 6.40
(4.77)
1050 6. 0
(5.07)
000
(3775)
720 3.70
(2.7 )
765 4.05
(3.02)
05 4.40
(3.2 )
45 4.75
(3.54)
0 5.10
(3. 0)
920 5.45
(4.07)
955 5. 5
(4.36)
990 6.20
(4.63)
1020 6.55
(4. 9)
1055 6.95
(5.1 )
100
(3 20)
730 3.85
(2.87)
770 4.15
(3.10)
10 4.50
(3.36)
50 4.90
(3.66)
90 5.25
(3.92)
925 5.60
(4.1 )
960 6.00
(4.4 )
995 6.35
(4.74)
1030 6.75
(5.04)
1060 7.10
(5.30)
200
(3 70)
740 4.00
(2.98)
7 0 4.30
(3.21)
20 4.70
(3.51)
55 5.00
(3.73)
95 5.40
(4.03)
930 5.75
(4.29)
965 6.15
(4.59)
1000 6.50
(4. 5)
1035 6.95
(5.1 )
1065 7.30
(5.45)
300
(3915)
745 4.10
(3.0 )
7 5 4.45
(3.32)
25 4. 0
(3.5 )
65 5.20
(3. )
900 5.55
(4.14)
935 5.90
(4.40)
970 6.30
(4.70)
1005 6.70
(5.00)
1040 7.10
(5.30)
1070 7.45
(5.56)
400
(3965)
755 4.25
(3.17)
795 4.60
(3.43)
35 5.00
(3.73)
70 5.30
(3.95)
910 5.75
(4.29)
945 6.10
(4.55)
9 0 6.50
(4. 5)
1010 6. 5
(5.11)
1045 7.25
(5.41)
1075 7.65
(5.71)
500
(4010)
7 0 4.40
(3.28)
00 4.75
(3.54)
40 5.10
(3. 0)
0 5.50
(4.10)
915 5.90
(4.40)
950 6.25
(4.66)
9 5 6.65
(4.96)
1015 7.00
(5.22)
1050 7.45
(5.56)
10 0 7. 0
(5. 2)
600
(4060)
770 4.55
(3.39)
10 4.90
(3.66)
50 5.30
(3.95)
5 5.65
(4.21)
920 6.00
(4.4 )
955 6.40
(4.77)
990 6. 0
(5.07)
1025 7.25
(5.41)
1055 7.60
(5.67)
10 5 .00
(5.97)
700
(4105)
780 4.70
(3.51)
15 5.05
(3.77)
55 5.45
(4.07)
90 5. 0
(4.33)
925 6.15
(4.59)
960 6.55
(4. 9)
995 6.95
(5.1 )
1030 7.40
(5.52)
1060 7. 0
(5. 2)
1090 .15
(6.0 )
00
(4155)
785 4.85
(3. 2)
25 5.20
(3. )
60 5.60
(4.1 )
900 6.00
(4.4 )
935 6.40
(4.77)
970 6. 0
(5.07)
1000 7.15
(5.33)
1035 7.55
(5.63)
1065 7.95
(5.93)
1095 .35
(6.23)
900
(4200)
795 5.00
(3.73)
30 5.35
(3.99)
70 5.75
(4.29)
905 6.15
(4.59)
940 6.55
(4. 9)
975 6.95
(5.1 )
1010 7.35
(5.4 )
1040 7.75
(5.7 )
1070 .15
(6.0 )
1105 .60
(6.42)
9000
(4245)
800 5.15
(3.84)
40 5.55
(4.14)
75 5.90
(4.40)
910 6.30
(4.70)
950 6.75
(5.04)
9 0 7.10
(5.30)
1015 7.55
(5.63)
1045 7.90
(5. 9)
10 0 .40
(6.27)
1110 8.80
( .5 )

Page 7
BLOWER DATA CHA16-240
BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL & AIR FILTERS IN PLACE.
FOR ALL UNITS ADD:
1 - Wet indoor coil air resistance of selected unit. 2 - Any field installed accessories air resistance (electric heat, economizer, duct resistance, diffuser, etc.)
Then determine from blower table blower motor output.
MINIMUM AIR VOLUME REQUIRED FOR USE WITH OPTIONAL ELECTRIC HEAT
DUnits require 4900 cfm (2310 L/s) minimum air with electric heat.
BOLD ITALIC INDICATES FIELD FURNISHED DRIVE
Air STATIC PRESSURE EXTERNAL TO UNIT Ċ Inches Water Gauge (Pa)
Air
Volume
f
.20 (50) .40 (100) .60 (150) .80 (200) 1.00 (250) 1.20 (300) 1.40 (350) 1.60 (400) 1.80 (450) 2.00 (495)
Volume
cfm
(L/s) RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
RPM BHP
(kW)
6000
(2 30)
5 0 1.70
(1.27)
10 1.95
(1.45)
0 2.20
(1. 4)
710 2.45
(1.83)
755 2.75
(2.05)
795 3.00
(2.24)
40 3.30
(2.46)
0 3.60
(2.69)
915 3. 5
(2. 7)
955 4.20
(3.13)
6100
(2 0)
5 5 1.75
(1.31)
20 2.05
(1.53)
70 2.30
(1.72)
715 2.55
(1.90)
7 0 2.85
(2.13)
00 3.10
(2.31)
45 3.40
(2.54)
5 3.70
(2.76)
920 3.95
(2.95)
955 4.25
(3.17)
6200
(2925)
575 1.85
(1.38)
25 2.10
(1.57)
75 2.35
(1.75)
720 2. 5
(1.98)
765 2.90
(2.16)
05 3.20
(2.39)
50 3.50
(2.61)
5 3.75
(2. 0)
925 4.10
(3.06)
960 4.40
(3.2 )
6300
(2975)
580 1.90
(1.42)
35 2.20
(1. 4)
80 2.45
(1.83)
725 2.75
(2.05)
770 3.00
(2.24)
15 3.30
(2.46)
50 3.60
(2.69)
90 3.90
(2.91)
930 4.20
(3.13)
965 4.50
(3.36)
6400
(3020)
590 2.00
(1.49)
40 2.30
(1.72)
85 2.55
(1.90)
735 2.85
(2.13)
775 3.10
(2.31)
20 3.45
(2.57)
55 3.70
(2.76)
95 4.00
(2.9 )
935 4.35
(3.25)
970 4.65
(3.47)
6500
(3065)
595 2.10
(1.57)
45 2.35
(1.75)
95 2. 5
(1.98)
740 2.95
(2.20)
7 0 3.20
(2.39)
25 3.55
(2.65)
60 3. 0
(2. 3)
900 4.10
(3.06)
940 4.45
(3.32)
975 4.75
(3.54)
6600
(3115)
05 2.20
(1. 4)
55 2.45
(1.83)
700 2.75
(2.05)
745 3.05
(2.28)
7 5 3.30
(2.46)
30 3.65
(2.72)
65 3.90
(2.91)
905 4.25
(3.17)
940 4.55
(3.39)
975 4. 5
(3.62)
6700
(3160)
10 2.25
(1. 8)
0 2.55
(1.90)
705 2.85
(2.13)
750 3.15
(2.35)
795 3.45
(2.57)
35 3.75
(2. 0)
70 4.00
(2.9 )
910 4.35
(3.25)
945 4.65
(3.47)
9 0 4.95
(3.69)
6 00
(3210)
20 2.35
(1.75)
5 2. 5
(1.98)
715 2.95
(2.20)
755 3.25
(2.42)
00 3.55
(2.65)
40 3. 5
(2. 7)
0 4.20
(3.13)
915 4.50
(3.36)
950 4. 0
(3.5 )
9 5 5.10
(3. 0)
6900
(3255)
25 2.45
(1.83)
75 2.75
(2.05)
720 3.05
(2.28)
765 3.35
(2.50)
05 3.65
(2.72)
45 3.95
(2.95)
5 4.30
(3.21)
920 4.60
(3.43)
955 4.90
(3.66)
990 5.25
(3.92)
7000
(3305)
35 2.55
(1.90)
80 2.85
(2.13)
725 3.15
(2.35)
770 3.45
(2.57)
10 3.75
(2. 0)
50 4.10
(3.06)
90 4.40
(3.2 )
925 4.75
(3.54)
960 5.05
(3.77)
995 5.40
(4.03)
7100
(3350)
40 2. 5
(1.98)
90 3.00
(2.24)
735 3.30
(2.4 )
775 3.60
(2.69)
15 3.90
(2.91)
55 4.20
(3.13)
95 4.55
(3.39)
930 4. 5
(3.62)
965 5.20
(3. )
1000 5.55
(4.14)
7200
(3400)
50 2.80
(2.09)
95 3.05
(2.28)
740 3.40
(2.54)
7 0 3.70
(2.76)
20 4.00
(2.9 )
60 4.35
(3.25)
900 4.70
(3.51)
935 5.00
(3.73)
970 5.35
(3.99)
1005 5.65
(4.21)
7300
(3445)
55 2.85
(2.13)
705 3.20
(2.39)
745 3.50
(2. 1)
790 3. 5
(2. 7)
30 4.15
(3.10)
65 4.45
(3.32)
905 4. 0
(3.5 )
940 5.15
(3. 4)
975 5.45
(4.07)
1010 5. 0
(4.33)
7400
(3490)
5 3.00
(2.24)
710 3.30
(2.4 )
755 3. 5
(2.72)
795 3.95
(2.95)
35 4.30
(3.21)
70 4.60
(3.43)
910 4.95
(3.69)
945 5.25
(3.92)
9 0 5.60
(4.1 )
1015 5.95
(4.44)
7500
(3540)
75 3.10
(2.31)
715 3.40
(2.54)
7 0 3.75
(2.80)
00 4.05
(3.02)
40 4.40
(3.2 )
0 4.75
(3.54)
915 5.05
(3.77)
950 5.40
(4.03)
9 5 5.75
(4.29)
1020 6.10
(4.55)
7600
(35 5)
80 3.20
(2.39)
725 3.55
(2. 5)
765 3. 5
(2. 7)
05 4.20
(3.13)
45 4.50
(3.36)
5 4.90
(3.66)
920 5.20
(3. )
955 5.55
(4.14)
990 5.90
(4.40)
1020 6.20
(4.63)
7700
(3635)
90 3.35
(2.50)
730 3. 5
(2.72)
775 4.00
(2.9 )
15 4.35
(3.25)
50 4.65
(3.47)
90 5.00
(3.73)
925 5.35
(3.99)
960 5.70
(4.25)
995 6.05
(4.51)
1025 6.40
(4.77)
7 00
(36 0)
95 3.45
(2.57)
740 3.80
(2.83)
7 0 4.15
(3.10)
20 4.45
(3.32)
60 4. 0
(3.5 )
95 5.15
(3. 4)
930 5.50
(4.10)
965 5. 5
(4.36)
1000 6.20
(4.63)
1030 6.55
(4. 9)
7900
(3730)
705 3. 0
(2. 9)
745 3.90
(2.91)
7 5 4.25
(3.17)
25 4.60
(3.43)
65 4.95
(3.69)
900 5.30
(3.95)
935 5.65
(4.21)
970 6.00
(4.4 )
1005 6.35
(4.74)
1035 6.70
(5.00)
000
(3775)
710 3.70
(2.7 )
755 4.05
(3.02)
795 4.40
(3.2 )
35 4.75
(3.54)
70 5.10
(3. 0)
905 5.45
(4.07)
940 5. 0
(4.33)
975 6.15
(4.59)
1010 6.50
(4. 5)
1040 6. 5
(5.11)
100
(3 20)
720 3.85
(2.87)
7 0 4.20
(3.13)
00 4.55
(3.39)
40 4.90
(3.66)
75 5.25
(3.92)
915 5.60
(4.1 )
950 6.00
(4.4 )
9 0 6.30
(4.70)
1015 6.70
(5.00)
1045 7.05
(5.26)
200
(3 70)
730 4.00
(2.98)
770 4.35
(3.25)
10 4.70
(3.51)
45 5.05
(3.77)
5 5.40
(4.03)
920 5.75
(4.29)
955 6.15
(4.59)
9 5 6.45
(4. 1)
1020 6. 5
(5.11)
1050 7.20
(5.37)
300
(3915)
735 4.15
(3.10)
775 4.45
(3.32)
15 4. 5
(3.62)
55 5.20
(3. )
90 5.55
(4.14)
925 5.90
(4.40)
960 6.30
(4.70)
995 6.65
(4.96)
1025 7.00
(5.22)
1055 7.35
(5.4 )
400
(3965)
745 4.30
(3.21)
7 5 4.65
(3.47)
25 5.00
(3.73)
60 5.35
(3.99)
95 5.70
(4.25)
930 6.05
(4.51)
965 6.45
(4. 1)
1000 6. 5
(5.11)
1030 7.20
(5.37)
1065 7.60
(5.67)
500
(4010)
750 4.40
(3.28)
790 4.75
(3.54)
30 5.15
(3. 4)
65 5.50
(4.10)
900 5. 5
(4.36)
940 6.25
(4.66)
970 6.60
(4.92)
1005 7.00
(5.22)
1035 7.35
(5.4 )
1070 7. 0
(5. 2)
600
(4060)
7 0 4. 0
(3.43)
00 4.95
(3.69)
35 5.30
(3.95)
75 5.70
(4.25)
910 6.05
(4.51)
945 6.45
(4. 1)
975 6.75
(5.04)
1010 7.15
(5.33)
1040 7.55
(5.63)
1075 7.95
(5.93)
700
(4105)
7 5 4.70
(3.51)
05 5.10
(3. 0)
45 5.45
(4.07)
0 5. 5
(4.36)
915 6.20
(4.63)
950 6.60
(4.92)
9 5 7.00
(5.22)
1015 7.35
(5.4 )
1045 7.70
(5.74)
10 0 .15
(6.0 )
00
(4155)
775 4.90
(3.66)
15 5.25
(3.92)
50 5.60
(4.1 )
5 6.00
(4.4 )
920 6.35
(4.74)
955 6.75
(5.04)
990 7.15
(5.33)
1020 7.50
(5.60)
1055 7.95
(5.93)
10 5 .35
(6.23)
900
(4200)
7 5 5.05
(3.77)
20 5.40
(4.03)
60 5. 0
(4.33)
95 6.20
(4.63)
930 6.55
(4. 9)
960 6.90
(5.15)
995 7.35
(5.4 )
1025 7.70
(5.74)
1060 .15
(6.0 )
1090 .55
(6.3 )
9000
(4245)
790 5.20
(3. )
30 5.60
(4.1 )
65 5.95
(4.44)
900 6.35
(4.74)
935 6.75
(5.04)
970 7.15
(5.33)
1000 7.50
(5.60)
1035 7.95
(5.93)
1065 .30
(6.19)
1095 8.70
( .49)

Page 8
BLOWER DATA GCS/CHA16
ACCESSORY AIR RESISTANCE
Total Resistance - inches water gauge (Pa)
Unit
Mdl
Air Volume
Wet
REMD16M
RTD11 Ste ĆDown Diffuser
FD11
Model
No
W
e
t
Eva orator
Electric Heat
REMD16M
Down
Ć
Flow
2 Ends
1 Side All Ends
FD11
Flush
No.
cfm L/s
Eva orator
Coil
El
ec
t
r
i
c
H
ea
t
Down
Ć
Flow
Economizer 2 Ends
O en
1
Side
2 Ends
O en
All
Ends
& Sides
O en
Flush
Diffuser
4 00 2265 .14 (35) .15 (37) .03 (7) .46 (114) .40 (99) .36 (90) .24 (60)
5000 2360 .14 (35) .17 (42) .03 (7) .51 (127) .44 (109) .39 (97) .27 (67)
5200 2455 .15 (37) .20 (50) .03 (7) .56 (139) .4 (119) .42 (104) .30 (75)
5400 2550 .16 (40) .22 (55) .04 (10) .61 (152) .52 (129) .45 (112) .33 ( 2)
5600 2645 .17 (42) .22 (55) .04 (10) .66 (164) .56 (139) .4 (119) .36 (90)
5 00 2735 .1 (45) .25 (62) .05 (12) .71 (177) .59 (147) .51 (127) .39 (97)
GCS/
CHA16-1 0 6000 2 30 .19 (47) .26 (64) .05 (12) .76 (1 9) .63 (157) .55 (137) .42 (104)
CHA16-1 0
6200 2925 .20 (50) .29 (72) .05 (12) . 0 (199) .6 (169) .59 (147) .46 (114)
6400 3020 .21 (52) .31 (77) .06 (15) . 6 (214) .72 (179) .63 (157) .50 (124)
6600 3115 .22 (55) .32 ( 0) .06 (15) .92 (229) .77 (191) .67 (167) .54 (134)
6 00 3210 .23 (57) .33 ( 2) .07 (17) .99 (246) . 3 (206) .72 (174) .5 (144)
7000 3305 .24 (60) .33 ( 2) .07 (17) 1.03 (256) . 7 (216) .76 (1 9) .62 (154)
7200 3400 .25 (62) .34 ( 5) .0 (20) 1.09 (271) .92 (229) . 0 (199) .66 (164)
6000 2 30 .24 (60) .26 (64) .05 (12) .36 (90) .31 (77) .27 (67) .29 (72)
6500 3065 .2 (70) .32 ( 0) .06 (15) .42 (104) .36 (90) .31 (77) .34 ( 5)
7000 3305 .31 (77) .33 ( 2) .07 (17) .49 (122) .41 (102) .36 (90) .40 (99)
GCS/
CHA16-240 7500 3540 .34 ( 5) .40 (99) .09 (22) .51 (127) .46 (114) .41 (102) .45 (112)
CHA16
-
240
000 3775 .3 (94) .42 (104) .10 (25) .59 (147) .49 (122) .43 (107) .50 (124)
500 4010 .42 (104) .50 (124) .11 (27) .69 (172) .5 (144) .50 (124) .57 (142)
9000 4245 .46 (114) .5 (144) .13 (32) .79 (196) .67 (167) .5 (144) .66 (164)
CEILING DIFFUSER AIR THROW DATA
Model
Air Volume
Effective Throw Range
Model
No.
Air Volume RTD11 Ste ĆDown FD11 Flush
No
.
cfm L/s ft. m ft. m
5600 2645 39 - 49 12 - 15 2 - 37 9 - 11
5 00 2740 42 - 51 13 - 16 29 - 3 9 - 12
GCS/CHA 6000 2 30 44 - 54 13 - 17 40 - 50 12 - 15
GCS/CHA
16-1 0 6200 2925 45 - 55 14 - 17 42 - 51 13 - 16
6400 3020 46 - 55 14 - 17 43 - 52 13 - 16
6600 3115 47 - 56 14 - 17 45 - 56 14 - 17
7200 3400 33 - 3 10 - 12 26 - 35 - 11
7400 3490 35 - 40 11 - 12 2 - 37 9 - 11
7600 35 5 36- 41 11 - 13 29 - 3 9 - 12
GCS/CHA
7 00 36 0 3 - 43 11 - 13 40 - 50 12 - 15
GCS/CHA
16
-
240
000 3775 39 - 44 12 - 13 42 - 51 13 - 16
16
-
240
200 3 70 41 - 46 12 - 14 43 - 52 13 - 16
400 3965 43 - 49 13 - 15 44 - 54 13 - 17
600 4060 44 - 50 13 - 15 46 - 57 14 - 17
00 4155 47 - 55 14 - 17 4 - 59 15 - 1
Throw is the horizontal or vertical distance an airstream travels on leaving the outĆ
letĂor diffuser before the maximum velocity is reduced to 50 ft. (15 m) per minute. Four
sides open.
PED16-18/24 POWER EXHAUST FANS PERFORMANCE
Model No. Air Volume Return Air System
Static Pressure
Model
No
.
cfm L/s In. w.g. Pa
6000 2 30 0 0
5700 2690 .05 12
5300 2500 .10 25
PED16-1 /24 5000 2360 .15 37
4700 2210 .20 50
4200 19 0 .25 62
3600 1700 .30 75

Page 9
OPTIONAL ACCESSORIES
Item GCS/CHA16Ć180 GCS/CHA16-240
Coil Guard - PVC coated steel wire guards to protect outdoor coil. Not used with Hail Guards. 78L49
Control Systems See Engineering Handbook
Differential Enthal y Control - For use with economizer dampers, solidĆstate return air sensor alĆ
lows selection between outdoor air and return air (whichever has lowest enthalpy). 54G44
Diffusers (Ste ĆDown) - Aluminum grilles, double deflection louvers, large center grille, insulated difĆ
fuser box with flanges, hanging rings furnished, interior transition (even air flow), internally sealed
(prevents recirculation), adapts to TĆbar ceiling grids or plaster ceilings.
RTD11Ć1 5
392 lbs. (17 kg)
RTD11Ć275
403 lbs. (1 3 kg)
Diffusers (Flush) - Aluminum grilles, fixed blade louvers, large center grille, insulated diffuser box
with flanges, hanging rings furnished, interior transition (even air flow), internally sealed (prevents
recirculation), adapts to TĆbar ceiling grids or plaster ceilings.
FD11Ć1 5
2 9 lbs. (131 kg)
FD11Ć275
363 lbs. (165 kg)
Transitions (Su ly and Return) - Used with diffusers, installs in roof mounting frame, galvanized
steel construction, flanges furnished for duct connection, fully insulated.
SRT16Ć1
75 lbs. (34 kg)
SRT16Ć24
120 lbs. (54 kg)
Economizer Dam ers (DownĆFlow or Horizontal) - Mechanically
linked recirculated air and outdoor air dampers, plugĆin connecĆ
tions to unit, nylon bearings, stainless steel seals (outdoor dampĆ
ers), 24 volt fully modulating spring return damper motor, adjustĆ
able minimum damper position switch, mixed air sensor, solidĆ
state adjustable outdoor air enthalpy control, 0 to 100% outdoor
air adjustable, powdered enamel paint finish.
Model No. - Net Wt.
REMD16MĆ1 /24
95 lbs. (43 kg)
(order Economizer Damper Hood
for complete assembly)
air
adjustable
,
powdered
enamel
paint
finish
.
NOTE - Economizer Damper Hood is required and must be ordered
separately (see below).
NOTE - Gravity Exhaust Dampers are required for down-flow apĆ
plications and must be ordered separately (see below).
Net face area 5.3 sq. ft. (0.49 m2)
Economizer Dam er Hood - Required with REMD16M economizer
dampers (see above) Installs over outdoor air dampers Includes
Order No. 81L45
36 lbs. (16 kg)
d
ampers
(
see a
b
ove
)
.
I
ns
t
a
ll
s over ou
td
oor a
i
r
d
ampers.
I
nc
l
u
d
es
cleanable aluminum mesh frame filters. No. & Size of Filters - in.
(mm)
(2) 25 x 25 x 1
(635 x 635 x 25)
Economizer Gravity Exhaust Dam ers - Required with REMD16 economizer dampers in down-
flow applications. Optional for horizontal applications. Neoprene coated fiberglass dampers. InĆ
cludes rain hood. Field installs on economizer for down-flow applications. Field installs on return air
duct for horizontal applications. See dimension drawings.
GED16-1 /24
23 lbs. (10 kg)
Economizer Power Exhaust Fans - For use with REMD16M econoĆ Model No. - Net Wt. PED16-1 /24
0 lbs. (36 kg)
Economizer
Power
Exhaust
Fans
-
For
use
with
REMD16M
econoĆ
mizer dampers (see above). Provides pressure relief. Installed beĆ
tween economizer and gravity exhaust dampers (required) Inter
Dia. - in. (mm) No. blades 20 (50 ) - 5
p( ) p
tween economizer and gravity exhaust dampers (required). InterĆ
locked to run when return air dampers are closed and supply air blow
ĆTotal air volume - cfm (L/s) 6000 (2 30)
locked
to
run
when
return
air
dampers
are
closed
and
supply
air
blow
Ć
ers are operating. Overload protected. Must be ordered separately. Motor horsepower (W) (2) - 1/3 (250)
ers
are
operating.
Overload
protected.
Must
be
ordered
separately.
Total Watts input 50
Hail Guards - Heavy duty field installed coil guard protects coils from damage. Not used with Coil
Guards. 78L48
Horizontal Su ly and Return Air Kit - Provides duct connection to unit, flanges furnished, hardĆ
ware furnished, two filler panels furnished for unused air openings in unit base.
HDK16-1 /24
55 lbs. (25 kg)
Low Ambient Controls - Allows unit operation down to 0_F (-17.7_C). LBĆ57113BY (85L42)
LPG/Pro ane Kits GCS MODELS ONLY 81L86
Outdoor Air Dam er Section (Down-Flow A lications Only) -
Linked mechanical dampers, 0 to 25% (fixed) outdoor air adjustĆ
able, installs on unit for downĆflow applications, outdoor air hood
and panel kit must be ordered separately (see below)
Minimum mixed air temperature:
Heat mode (aluminized heat exchanger) - 45°F (7°C)
Maximum mixed air temperature:
Cool mode - 90°F (32°C),
Model No.
OAD16Ć1 /24
(Order Air Damper Hood and Damper Panel Kit
for complete assembly)
Outdoor Air Dam er/Hood - Cleanable aluminum mesh frame t
yp
eCatalog No. - Net Wt. 81L38
52 lbs. (24 kg)
Outdoor
Air
Dam er/Hood
-
Cleanable
aluminum
mesh
frame
type
filter furnished, installs over outdoor air damper section. No. & Size of Filters (1) 26 x 2 x 1 in.
(660 x 711 x 25 mm)
Electric Heat - Factory or field installed, helix wound nichrome elements, time delay for element staging.
individual element limit controls, may be twoĆstage controlled, requires optional Fuse Block
CHA16 MODELS ONLY
ECH16Ć1 5-15
15 kW (all voltages)
ECH16-1 5/300
30Ć45-60 kW
(all voltages)
75 kW (460/575v)
ECH16Ć1 5/300
30Ć45-60 kW
(all voltages)
75 kW (460/575v)
3 hp (2.2 kW) 84L19 (90 amp) - - - -
20 /230v -3 phase 5 hp (3.7 kW) 84L19 (90 amp) 84L24 (110 amp)
20 /230v
3
phase
7.5 hp (5.7 kW) - - - - 89L37 (125 amp)
Unit Fuse Block - Required for electric heat installaĆ 3 hp (2.2 kW) 84L20 (45 amp) - - - -
Unit
Fuse
Block
Required
for
electric
heat
installa
tion, wiring harness and mounting screws furnished 460v - 3 phase 5 hp (3.7 kW) 84L22 (50 amp) 84L22 (50 amp)
tion,
wiring
harness
and
mounting
screws
furnished
CHA16 MODELS ONLY
460v
3
phase
7.5 hp (5.7 kW) - - - - 84L22 (50 amp)
CHA16
MODELS
ONLY
3 hp (2.2 kW) 84L21 (30 amp) - - - -
575v - 3 phase 5 hp (3.7 kW) 84L23 (35 amp) 84L25 (40 amp)
575v
3
phase
7.5 hp (5.7 kW) - - - - 84L24 (45 amp)

Page 10
FIGURE 1
GCS16-180/240 PARTS ARRANGEMENT
EVAPORATOR
COIL
BLOWER MOTOR
BOTTOM POWER ENTRY
CONDENSER FAN
CONDENSER
COIL
CONTROL BOX
COMPRESSOR (3)
MANIFOLD
ASSEMBLY
GAS VALVE
COMBUSTION
AIR INDUCER
HEAT EXCHANGER TUBES
FILTERS (4)
16 X 20 X 2"
BURNER
CONTROL
BOX
FLUE BOX
COVER
FIGURE 2
CHA16-180/240 PARTS ARRANGEMENT
EVAPORATOR
COIL
BLOWER MOTOR
BOTTOM POWER
ENTRY
CONDENSER FAN (2)
CONDENSER
COIL
CONTROL BOX
COMPRESSOR (3)
FILTERS (6)
18 X 24 X 2"
ELECTRIC HEAT
COMPARTMENT
ELECTRIC HEAT MAKE
UP BOX

I-APPLICATION
GCSCHA 15 and 20 ton units are available in one
cabinet size. All models are applicable for commercial
three phase installations. GCS/CHA16 models are
factory equipped with the hardware required for install-
ing optional thermostat control systems.
II-UNIT COMPONENTS
See figures 1 and 2 for GCS16 or CHA16-180/240 parts
arrangement.
A-Control Box Components
The GCS/CHA16 control box is shown in figure 3. The
control box is located in the upper portion of the com-
pressor compartment behind the compressor compart-
ment access panel. Note that the burner ignition control
and other components are located in the burner control
box, above the manifold assembly.
The condenser fans can be accessed by removing the
fan grills located on top of the unit.
The indoor blower access panel (all units) is located to
the left side of the heating compartment access.
1 - Transformer T1
All GCS16/CHA-180/240 units use a line voltage to
24VAC transformer mounted in the control box. The
transformer supplies power to control circuits in the unit.
Transformers are rated at 70VA and is protected by a
3.5 amp circuit breaker (CB). CB8 is internal to the
transformer. Transformers use two primary voltage taps
as shown in figure 6.
Page 11
DANGER
Remove all power to disconnect before
servicing.
Electrical shock resulting in death or injury
may result if power is not disconnected.
CAUTION
Label all wires prior to disconnection when
servicing control box. Wiring errors can
cause improper and dangerous operation.
Verify proper operation after servicing.

Page 12
2 - Cooling Contactor K1, K2 & K14
K1, K2 and K14, are 24V coil contactors used to energize
the compressors in response to thermostat demand. K1
and K2 energize compressors B1 and B2 in response to Y1
first stage cooling demand. K14 energizes compressor B13
in response to Y2 second stage cooling demand. All units
use three-pole-double-break contactors.
3 - Com ressor Run Time Delay DL15 & DL9
All GCS16 units are equipped with compressor run time
delay DL15 (1st stage cool) and DL9 (2nd stage cool). The
delay time (approximately 2 seconds) prevents compresĆ
sors B1, B2 and B13 from energizing simultaneously during
a demand for 1st or 2nd stage cool.
4 - Indoor Blower Contactor K3
All GCS16/CHA-1 0/240 units use a three-pole double
break contactor to energize the indoor blower and optional
economizer. The coil is energized by blower demand from
indoor thermostat terminal G" (cooling demand or fan
switch in ON" position).
5 - Condenser Fan Contactor K10
K10 is a single pole contactor in -1 0 units and three pole
contactor in -240 units, used to energize condenser fans B4
and B5 in response to thermostat demand.
6 - Condenser Fan Motor Ca acitors C1 &C2
Fan capacitors C1 and C2 (GCS16-1 0 only) are used to
assist in start up of condenser fans B4 and B5 respectively.
See condenser fan motor nameplate for capacitor ratings.
7 - Condenser Fan Motor Fuse F10
Three line voltage fuses F10 provide overcurrent protection
to condenser fans B4 and B5 (and optional power exhaust
fans ) in all Y voltage GCS16 units. The fuses are rated at
30A.
8 - Terminal Stri s TB2, TB13 and TB34
Terminal strips TB13 and TB2 distribute line voltage power
to line voltage components in the unit. TB34 distributes 24V
power from transformer T1 to the control box components.
TB13 is located in the bottom power entry section for GCS
units and in the electric heat make up box for CHA units.
9 - Power Exhaust Relay K65
K65 is a N.O. DPDT relay with a 24Vcoil. K65 is used with all
units with the optional power exhaust fans. K65 is energized
by a mercury switch S39, which is mounted on the econoĆ
mizer intake blades. S39 closes when the damper reaches
50% open. When K65 closes exhaust fans B10 and B11 are
energized. K65 is located behind the filter access panel.
10 - Blower Motor Overload Relay S42
The motor relay is used on all M voltage GCS16 units. The
relay is connected in line with the blower motor to monitor
the current flow to the motor. When the relay senses an
overload condition, a set of normally closed contacts open
to de-energize the blower motor and terminate 24V supply
to TB34.
Relay Panel A11
A11 is a pilot duty relay board that reduces load on the therĆ
mostat circuit. Installations with extended thermostat wiring
without A11 will have excessive voltage drop affecting start
up operation. The following relays: K46, K77, K49,K66 and
K67 are a part of this board. If any of these relays fail reĆ
place the entire board.
11 - Blower Relay K46
Blower relay K46 is located on relay panel (A11) in the main
control box. K46 is energized in response to G" demand
from the indoor thermostat. K46 contacts close energizing
indoor blower relay K3.
12 - Heat Relay K77 (1st Stage)
Heat relay K77 is located on the relay panel (A11) in the
main control box. K77 is energized in response to 1st stage
heat demand W1. K77 contacts close energizing combusĆ
tion air inducer relay K13 to begin heat operation.
13 - Heat Relay K49 (2nd Stage)
Heat relay K49 is located on the relay panel (A11) in the
main control box. K49 is energized in response to 2nd stage
heat W2. K49 contacts close energizing DL3 heat delay
timer. After 1 0 seconds DL3 energizes the gas valve on
2nd stage heat.
14 - Cool Relay K66 (1st Stage)
Cool relay K66 is located on the relay panel (A11) in the
main control box. K66 is energized in response to 1st stage
cool demand Y1. K66 contacts close energizing compresĆ
sor contactor K1 which in turn energizes compressor B1. SiĆ
multaneously, compressor delay DL15 is energized, startĆ
ing a two second delay. After the delay, compressor contacĆ
tor K2 is energized which in turn energizes compressor B2.
15 - Cool Relay K67 (2nd Stage)
Cool relay K67 is located on the relay panel (A11) in the
main control box. K67 is energized in response to 2nd stage
cool demand Y2. K67 contacts close energizing compresĆ
sor delay DL9. After a two second delay, compressor conĆ
tactor K14 is energized which in turn energizes compressor
B13.

Page 13
B-Burner Control Box Figure 5
GCS models only
Figure 1 shows the location of the burner control box just
above the manifold assembly.
FIGURE 5
IGNITION CONTROL A3
TRANSFORMER
T3 (G, J & M VOLTAGE)
TIMER DL3 C.A.I. RELAY
K13
LIMIT RELAY
K20
BLOWER DELAY
RELAY K25
BURNER CONTROL BOX
1 - Indoor Blower Delay Relay K25
Relay K25 is a printed circuit board located in the burner
control box wired in series with the gas valve. K25 is deĆ
signed to provide an indoor blower delay of 45 seconds on
time and 150 seconds off time during a heat demand. When
there is a demand for heat, the gas valve will open and the
on time delay will begin. When heat demand is satisfied the
gas valve will close and the off time will begin.
2 - Combustion Air Inducer Relay K13
Relay K13 is a DPDT relay located inside the control box.
K13 is energized by heating demand from the thermostat
and is energized throughout the heating demand. When
energized, K13 normally open contacts close to energize
the combustion air inducer and begin a heating sequence.
3 - Indoor Blower Limit Relay K20
Relay K20 is a DPDT relay located in the burner control box.
Relay K20 is wired in series with limit S10 and S21. If either
limit opens, K20-1 contacts close energizing blower contacĆ
tor K3. Simultaneously, K20-2 contacts open de-energizing
the gas valve on second stage heat.
4 - Gas Delay DL3
DL3 is a SPST time delay located in the burner control box.
Upon receiving increased heat demand, DL3 initiates a 1 0
second time delay before closing its N.O. contacts. After the
delay, DL3 energizes W2 on the gas valve bringing on 2nd.
stage heat. DL3 is wired in series with the gas valve and inĆ
door blower limit relay K20.
5 - Transformer T3 (G, J & M Voltage Only)
All GCS16/CHA-1 0/240 G and J units use one 230VAC
transformer mounted in the control box. The transformer
has an output rating of 0.5A. T3 transformer supplies
230VAC power to combustion air inducer motor B6.
6 - Ignition Control A3
DANGER
Shock Hazard.
S ark related com onents contain
high voltage. Disconnect ower
before servicing unit.Ă The ignition
control is not field re airable.
Can cause unsafe o eration, injury
or death.
CAUTION
Electrostatic discharge can affect electronic
com onents. Take recautions during unit
installation and service to rotect the electronic
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 electroĆ
static charge by touching hand and all tools on
an un ainted unit surface, such as the gas
valve or blower deck, before erforming any
service rocedure.
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
ALL GCS16 units are equipped with a Johnson control.
See figure 6. The ignition control provides three main funcĆ
tions: gas valve control, ignition, and flame sensing. The
unit will usually ignite on the first attempt; however, the
ignition attempt sequence provides three trials for ignition
before locking out. After one hour, the ignition control automatiĆ
cally resets and provides three more attempts at ignition.
Manual reset after lockout requires breaking and remaking
power to the ignition control. See figure 7 for ignition seĆ
quence with retrials timings.
Flame rectification sensing is used on all GCS16 units.
Loss of flame during a heating cycle is indicated by an abĆ
sence of flame signal. If this happens, the control will immediĆ
ately restart the ignition sequence and then lock out if ignition is
not gained after the third trial. Normal flame signal is 0.5 - 1.0
micro amps with a drop out signal of .09.
The ignition control shuts off gas flow immediately in the event
of a power failure. Upon restoration of gas and power, the conĆ
trol will restart the ignition sequence and continue until flame is
established or system locks out.
On a heating demand, the combustion air blower is energized.
As the combustion air blower nears full speed, the combustion
air prove switch S1 closes energizing ignition control A3.
The ignition control then has a 30 to 40 second delay to allow
the combustion air blower to purge exhaust gases from the

Page 14
combustion chamber and introduce fresh air. After the delay,
the ignition control then activates gas valve, the spark elecĆ
trode and the flame sensing electrode.
Sparking stops immediately after flame is sensed. The comĆ
bustion air blower continues to operate throughout the heating
demand. If the flame fails or if the burners do not ignite, the igniĆ
tion control will attempt to ignite the burners up to two more
times. If ignition cannot be obtained after the third attempt, the
control will lock out. The ignition control is not adjustable.
Spade connections are used to connect the control to the
unit. Each of the spade terminals are identified by function.
The spark electrode wire connects to the sparkĆplugĆtype
connector on top of the control.
JOHNSON IGNITION CONTROL
FIGURE 6
FIGURE 7
ÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉ
ÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉ
ÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉ
JOHNSON NORMAL IGNITION SEQUENCE
TIMINGS NOMINAL
THERMOSTAT DEMAND
combustion air BLOWER
GAS VALVE
IGNITION SPARK
BLOWER
IGNITION TRIAL
SECONDS 0 30 35 0 110
ON / CLOSED
OFF / OPEN END OF
DEMAND
1
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
combustion air PROVE SWITCH
5 570
RETRIALS - IGNITION ATTEMPT SEQUENCE - TIMINGS NOMINAL
ÉÉÉ
ÉÉÉ
ÉÉ
ÉÉ
ÉÉ
THERMOSTAT DEMAND
combustion air BLOWER
GAS VALVE
IGNITION SPARK
BLOWER
IGNITION TRIAL
SECONDS 0 30 35 70
ON
OFF
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉ
É
É
É
ÉÉ
ÉÉ
65 100 105
WATCHGUARD
LOCKOUT
combustion air PROVE SWITCH
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
5
ÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
ÉÉÉ
ÉÉÉ
THERMOSTAT DEMAND
combustion air BLOWER
GAS VALVE
IGNITION SPARK
BLOWER
IGNITION TRIAL
SECONDS 0 30
ON
OFF
IGNITION CONTROL TIMING
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉ
ÉÉÉ
ÉÉÉ
30 30 HEATING
CYCLE
6 (+3.4, -2.0) SEC. END OF
THERMOSTAT
DEMAND
123
42 SEC. 122 SEC.

Page 15
FIGURE 8
GCS16-180/240 HEAT EXCHANGER ASSEMBLY
HIGH INPUT ASSEMBLY SHOWN
MANIFOLD/BURNER ASSEMBLY
(LOW INPUT MANIFOLD WILL HAVE 5 BURNERS)
DIVISION PANEL
BLOWER
COMPARTMENT
SECONDARY LIMIT
S21
PRIMARY LIMIT
S10
HEAT EXCHANGER
(LOW INPUT HEAT EXCHANGER WILL HAVE 5 TUBES)
COMBUSTION
AIR INDUCER
GAS VALVE
BURNERS
ROLLOUT SWITCH
S47 (HIGH INPUT)
ROLLOUT SWITCH
S47 (LOW INPUT)
IGNITOR
SENSOR
(HIGH INPUT)
SENSOR
(LOW INPUT)

C-Gas Heat Components
1 - Heat Exchanger (Figure 8)
All units use an aluminized steel tubular heat exchanger.
Each tube has a matching inshot burner. GCS16 low input
units will have five tube heat exchanger with matching inshot
burners. High input units will have an eight tube heat ex-
changer with matching burners. Combustion takes place at
each tube entrance and is drawn upwards through each
tube by the combustion air blower. Heat is transferred from
all surfaces of the heat exchanger tubes. The supply air
blower, controlled by the ignition control, forces air across all
surfaces of the tubes to extract the heat of the combustion.
The shape of the tubes ensure maximum heat exchange.
2-Burner Assembly (Figure 8)
The burners are controlled by the spark electrode, flame
sensing electrode, gas valve GV1 and combustion air
blower B6. The spark electrode, flame sensing electrode
and gas valve GV1 are directly controlled by ignition control
A3.
a-Burners
All units use inshot burners. Burners are factory set and do
not require adjustment. Burner shutters are designed to be
fully open only. Units are furnished with a peep hole with
cover in the access panel for flame viewing. Always operate
unit with access panel in place. Burners can be individually
removed for service. Burner maintenance and service is
detailed in the MAINTENANCE section of this manual.
b-Orifice
Each burner uses an orifice which is matched to the burner
input. The orifice is threaded into the manifold. The burner is
supported by the orifice and will easily slide off for service.
Each orifice and burner are sized specifically to the unit.
3-Flame Rollout Switch S47 (figure 9)
Flame rollout switch S47 is a high temperature limit located
just above the burner on all units. See figure 9. The limit is a
N.C. SPST manual re-set thermostat connected in series
with ignition control A3. When S47 senses flame rollout,
ignition control immediately closes the gas valve. The switch
is factory set to open at 180o and cannot be adjusted.
4-Primary High Temperature Limit S10
S10 is the primary limit for gas heat. See figure 10. S10 is
located in the bottom are of the division panel between the
blower compartment and the heat section. See figure 8.
Primary limit S10 is wired in series with the burner control
Page 18
A3. S10 N.C. contacts open to de-energize the ignition
control when excessive heat is reached in the heat ex-
changer. At the same time, the N.O. contacts close energiz-
ing K20 blower limit relay, which in turn energizes the blower
relay K3 energizing indoor blower B3. See table 1 for factory
set point.
5-Secondary Limit S21
All GCS16 model units are equipped with a secondary limit
(figure 8) located in the upper are of the division panel
between the blower compartment and heat section. The limit
is a SPDT auto-re-set thermostat which opens on tempera-
ture rise. S21 is wired in series with the ignition control. The
limit is used to de-energize the ignition control and shut
down the unit when temperature in the blower compartment
becomes too high. The limit is factory set and is not adjust-
able. See table 1. This is a safety shut-off function of this
unit and must never be bypassed.
6 - Combustion Air Prove Switch S18
Combustion air prove switch S18 is a SPST N.O. centrifugal
switch inside the combustion air motor. It is used to monitor
combustion air inducer operation. The switch is wired in
series with ignition control A3. On start up, the switch closes
when the combustion air motor reaches a set speed (RPM)
to allow power to the ignition control (proves, by closing, that
the combustion air inducer is operating before allowing the
ignition control to be energized).
7 - Combustion Air Inducer B6
Combustion air inducer B6 provides fresh air to the burner
while clearing the combustion chamber of exhaust gases.
The blower uses a PSC, 208/230VAC, single phase, 1/25 hp
motor. The blower begins operating immediately upon
receiving a thermostat demand and is de-energized immedi-
ately when thermostat demand is satisfied. However, at
colder ambients down to -40oF, the blower may take up to
15 seconds before rotation begins. All combustion air
inducer motors are sealed and cannot be oiled.
Heat Input S10 Set PointoS21 Set Pointo
235,000 Btuh 200 140
375,000 Btuh 180 140
Table 1

Page 17
8 - Ca acitor C3
Combustion air inducers on all GCS16 units require run caĆ
pacitors. Capacitor C3 is connected to and aids in the start
up of combustion air inducer B6. See combustion air inducĆ
er motor nameplate for capacitor ratings.
9 - Flue Vent (Figure 11)
IMPORTANT
Vent ca assembly must be installed without
modification. Any modification to the vent ca
assembly or failure to install assembly can result
in im ro er o eration and will void the C.S.A.
certification of the unit.
CAUTION
Do not start or o erate unit unless vent ca is in
lace.
FIGURE 11
TOP OF UNIT
VENT CAP
(secure with 3 screws rovided)
FLUE VENT
10 - Gas Valve GV1
Gas valve GV1 is a two-stage redundant gas valve used in
all GCS16 units. Units are equipped with valves manufacĆ
tured by White-Rodgers. First stage (low fire) is quick openĆ
ing (on and off in less than 3 seconds). Second stage is slow
opening (on in 40 seconds off in 30 seconds). On a call for
first stage heat (low fire), the valve is energized by the igniĆ
tion control simultaneously with spark electrode. On a call
for second stage heat (W2) timer DL3 energizes W2 on the
valve after a 3 minute delay. A manual shut off knob is proĆ
vided on the valve for shut off. The knob immediately closes
both stages without delay. See table 2 for manifold range.
TABLE 2
Manifold Pressure Range
Valve Stage Nat W.C. L.P." W.C.
*Low Fire 1.6 ± 0.2 5.5 ±0.3
High Fire 3.7 ±0.3 10.5 ±0.5
*Low fire manifold pressure is NOT adjustable.
11 - Ignitor / Flame Sensor Figure 12
Ignitor tips are located in the path of the left most burner.
The sensor tip is located in the right most burner path. Both
ignitor and sensor are fastened to the lower burner bracket.
See figure 12. The sensor and ignitor are identical comĆ
onents. However, each line u differently to the center
line of the burner. See figure 13. During ignition, spark
travels through the ignitor electrode and arcs across to the
ground electrode. During operation, flame is sensed by a
current passed along the ground electrode, through the
flame and into the sensor.
FIGURE 12
IGNITOR / SENSOR
IMPORTANT
In order to maximize s ark energy to the elecĆ
trode, the high voltage wire should not rest on
the bottom of unit vestibule anel and should
touch unit cabinet as little as ossible.
a - S ark Electrode
The spark electrode is connected to the ignition control
by a 5mm silicone insulated stranded high voltage wire.
The wire uses 1/4" female quick connect on the elecĆ
trode end and female spark plug-type terminal on the
ignition control end. See figure 13 for gap dimensions.
The electrode is located on the left side of the burner/
manifold assembly for both, high and low input units.
See figure .
b - Flame Sensor
Flame is sensed by rectification through the flame sensĆ
ing rod. The sensor is located on the right side of the
burner/manifold assembly for both low and high input
units. See figure .
FIGURE 13
SENSOR
1/8 
s ark ga
C
LC L
1/8 
s ark ga
IGNITOR

Page 18
PLUMBING COMPONENTS GCS/CHA16-180
FIGURE 14
PLUMBING COMPONENTS GCS/CHA16-240
EXPANSION VALVE
EXPANSION VALVE
EXPANSION VALVE
COMPRESSOR
STAGE 1
DRIERS 3
STAGE 1
STAGE 2
STAGE 3
DISCHARGE LINE
DISCHARGE LINE
SUCTION LINE
SUCTION LINE
SUCTION LINE
EXPANSION VALVE
EXPANSION VALVE
EXPANSION VALVE
SUCTION LINE
SUCTION LINE
SUCTION LINE
STAGE 1
STAGE 2
STAGE 3 DRIERS 3
DISCHARGE LINE
DISCHARGE LINE
CONDENSER COIL
EVAPORATOR COIL
CONDENSER COIL
EVAPORATOR COIL
COMPRESSOR
STAGE 3
COMPRESSOR
STAGE 2
COMPRESSOR
STAGE 1
COMPRESSOR
STAGE 3
COMPRESSOR
STAGE 2

SCROLL COMPRESSOR
DISCHARGE
SUCTION
FIGURE 15
FIGURE 16
Page 19
D-Cooling Com onents
DANGER
Shock hazard.
Com ressor must be grounded. Do
not o erate without rotective cover
over terminals. Ca acitors contain
high voltage. Disconnect ower beĆ
fore removing cover. Discharge caĆ
acitors before servicing unit. DisĆ
connect ower before servicing unit.
Can cause unsafe o eration, injury
or death.
Summary of Features
All units use DX cooling. Cooling in GCS16 units may also
be supplemented by fieldĆinstalled economizer. All units
use a single slab-type enhanced fin evaporator with rifled
tubing and a thermal expansion valve (TXV") as the exĆ
pansion device (figures 14). All models use drawĆthrough
type condenser fans.
1 - Scroll Com ressor
All GCS/CHA16-240 units
utilize three scroll comĆ
pressors. The scroll comĆ
pressor design is simple,
efficient and requires few
moving parts. A cutaway
diagram of the scroll comĆ
pressor is shown in figure
15. The scrolls are located
in the top of the compresĆ
sor can and the motor is
located in the bottom of
the compressor can. The
oil level is immediately beĆ
low the motor and oil is
pressure fed to the moving parts of the compressor. The
lower portion of the compressor shell is exposed to low side
pressure while only the very top of the shell is exposed to
high side pressure.
The scroll is a simple compression concept centered
around the unique spiral shape of the scroll and its inherent
properties. Figure 16 shows the basic scroll form. Two
identical scrolls are mated together forming concentric spiĆ
ral shapes (figure 17).
One scroll remains staĆ
tionary, while the other is
allowed to orbit (figure
1 -1). Note that the orbitĆ
ing scroll does not rotate
or turn but merely orbits
the stationary scroll.
The counterclockwise orbiting scroll draws gas into the outĆ
er crescent shaped gas pocket created by the two scrolls
(figure 1 -2). The centrifugal action of the orbiting scroll
seals off the flanks of the scrolls (figure 1 -3). As the orbitĆ
ing motion continues, the gas is forced toward the center of
the scroll and the gas pocket becomes compressed (figure
1 -4).
When compressed gas reaches the center, it is discharged
vertically into a chamber and discharge port in the top of the
compressor (figure15). The discharge pressure forcing
down on the top scroll helps seal the upper and lower edges
(tips) of the scrolls (figure 17). During a single orbit, several
pockets of gas are compressed simultaneously providing
smooth continuous compression.
STATIONARY SCROLL
ORBITING SCROLL
DISCHARGE
SUCTION
CROSS-SECTION OF SCROLLS
TIPS SEALED BY
DISCHARGE PRESSURE
DISCHARGE
PRESSURE
FIGURE 17

The scroll compressor is tolerant to the effects of liquid
return. If liquid enters the scrolls, the orbiting scroll is
allowed to separate from the stationary scroll. The liquid is
worked toward the center of the scroll and is discharged. If
the compressor is replace, conventional cleanup practices
must be used.
Due to its efficiency, the scroll compressor is capable of
drawing a much deeper vacuum than reciprocating com-
pressors. Deep vacuum operation can cause internal fusite
arcing resulting in damaged internal parts and compressor
failure. It is permissible to “pump-down” the system using
the compressor but never use a scroll compressor for
drawing a vacuum on the system. The type of damage can
be detected and will result in denial of warranty claims.
For compressor specifications see compressor nameplate
or ELECTRICAL DATA section in this manual. All compres-
sors are protected by internal overload protection circuitry.
2-Reciprocating Compressor
GCS/CHA16-180 units are equipped with three reciprocating
compressors B1, B2 and B13. Compressor B1 and B2 are
energized in response to Y1 (1st stage cool) demand and
B13 is energized in response to Y2 (2nd stage cool) de-
mand. See compressor nameplate or ELECTRICAL DATA
section for compressor specifications.
Page 20
3-Condenser Fan and Motor B4 & B5
The specifications section in this manual shows the specifi-
cations of condenser fans used in GCS/CHA16 units.
Condenser fans B4 and B5 are controlled by condenser fan
relay K10 and are both energized in response to demand.
4-Indoor Blower Motor B3
All GCS/CHA16 model units use three-phase, PSC, belt
driven blower motors. See motor nameplate or ELECTRI-
CAL DATA section for motor specifications.
5-Evaporator Coil
GCS/CHA16-180 units have three row single slab evapora-
tor coils. GCS16-240 units have four row three slab evapo-
rator coils. The rows are of rifled copper tubes fitted with
ripple-edged aluminum fins. A Thermal Expansion Valve
(TXV) feed multiple parallel circuits through the coil. See
figure 19.
CAUTION
The head of a scroll compressor may be hot
since it is in constant contact with discharge
gas.
Contact could result in serious burns.