Goodmans COMMERCIAL HEATING & COOLING 3 TON - 6 TON PACKAGE GAS UNIT CPG SERIES - Manual (Page 10)

10
Areas Without Convenience Outlet
It is recommended that an independant 115V power source
be brought to the vicinity of the roof top unit for portable lights
and tools used by the service mechanic.
U NITS INSTALLED ON R OOF T OPS
Main power and low voltage wiring may enter the unit through
the condenser end of unit or through the roof curb. Install
conduit connectors at the desired entrance locations. Exter-
nal connectors must be weatherproof. All holes in the unit
base must be sealed (including those around conduit nuts)
to prevent water leakage into building. All required conduit
and fittings are to be field supplied.
Supply voltage to roof top unit must not vary by more than
10% of the value indicated on the unit data plate. Phase
voltage unbalance must not exceed 2%. Contact your local
power company for correction of improper voltage or phase
unbalance.
HIGH VOLTAGE ENTRANCE
LOW VOLTAGE ENTRANCE
1:4
30 1/4”*
12 3/8”
(REMOVE PLUG)
* (6 Ton - 34 1/4”)
4 1/2”
47 1/2”
7 1/2”
POWER THRU
THE CURB
3.5 DIA.
Electrical Entrance and Thru Curb
Unit is equipped with a Low Voltage Terminal Block and has
Single Point wiring to the contactor.
L
OW
V
OLTAGE
C
ONTROL
W
IRING
1. A 24V thermostat must be installed for unit operation.
It may be purchased with the unit or field -supplied.
Thermostats may be programmable or
electromechanical as required.
2. Locate thermostat or remote sensor in the conditioned
space where it will sense average temperature. Do
not locate the device where it may be directly exposed
to supply air, sunlight or other sources of heat. Follow
installation instructions packaged with the thermostat.
3. Use #18 AWG wire for 24V control wiring runs not
exceeding 75 feet. Use #16 AWG wire for 24V control
wiring runs not exceeding 125 feet. Use #14 AWG
wire for 24V control wiring runs not exceeding 200
feet. Low voltage wiring may be National Electrical
Code (NEC) Class 2 where permitted by local codes.
4. Route thermostat wires from sub-base terminals to
the unit. Control wiring should enter through the
condenser end of unit or through curb. Connect
thermostat and any accessory wiring to low voltage
terminal block TB1 in the main control box.
NOTE: Field-supplied conduit may need to be installed
depending on unit/curb configuration. Use #18 AWG solid
conductor wire whenever connecting thermostat wires to
terminals on sub-base. DO NOT use larger than #18 AWG
wire. A transition to #18 AWG wire may be required before
entering thermostat sub-base.
LEAD THERMOSTAT
Red R (24V)
Green G (Fan)
Yellow Y1 (High Cool)
Purple Y2 (Low Cool)
Blue Common (if req'd)
White W1 (Heat)
Brown W2 (High Heat)
CPG 036 Thru 072 (Gas Heat)
GAS SUPPLY PIPING
T O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER
INSTALLATION , ADJUSTMENT , ALTERATION , SERVICE OR
MAINTENANCE , REFER TO THIS MANUAL . F OR ADDITIONAL
ASSISTANCE OR INFORMATION , CONSULT A QUALIFIED INSTALLER ,
SERVICE AGENCY OR THE GAS SUPPLIER .
WARNING
IMPORTANT NOTE: This unit is factory set to operate on
natural gas at the altitudes shown on the rating plate.
T O AVOID PROPERTY DAMAGE , PERSONAL INJURY OR DEATH WHEN
EITHER USING PROPANE GAS ALONE OR AT HIGHER ALTITUDES ,
OBTAIN AND INSTALL THE PROPER CONVERSION KIT ( S ). F AILURE TO
DO SO CAN RESULT IN UNSATISFACTORY OPERATION AND / OR
EQUIPMENT DAMAGE . H IGH ALTITUDE KITS ARE FOR U.S.
I NSTALLATIONS ONLY AND ARE NOT APPROVED FOR USE IN C ANADA .
WARNING
The rating plate is stamped with the model number, type of
gas and gas input rating. Make sure the unit is equipped to
operate on the type of gas available. Conversion to propane