ALLIED COMMERCIAL GCS16 Series 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.
GENERAL .......................................................Page 1
SPECIFICATIONS............................................Page 2
HIGH ALTITUDE...............................................Page 3
ELECTRICAL DATA............ ............................Page 4
BLOWER DATA.............................................. .Page 4
OPTIONAL ACCESSORIES....................... .....Page 10
PARTS ARRANGEMENT.................................Page 12
I APPLICATION................................................Page 14
II UNIT COMPONENTS....................................Page 14
III OPTIONAL ELECTRIC HEAT.......................Page 25
Service Literature
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.
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.
Table of Contents
IV PLACEMENT AND INSTALLATION.............Page 30
V ELECTRICAL CONNECTIONS.....................Page 30
VI INDOOR BLOWER OPERATION.................Page 30
VII START UP....................................................Page 31
VIII REFRIGERATION SERVICE CHECKS......Page 32
IX HEATING SERVICE CHECKS......................Page 33
X MAINTENANCE............................................. Page 35
XI ACCESSORIES.............................................Page 37
XII WIRING AND OPERATION SEQUENCE....Page 41
Page 1
GCS/CHA16
15 and 20 Ton
(52.8 and 70.3 kW)
WARNING
WARNING