High Voltage Connections; Electrical Connections; Low Voltage Connections; Overcurrent Protection - Goodman CONDENSING UNIT Installation & Service Reference

•
If pressure rises above 2000 microns, a leak is present.
Check for leaks as previously indicated and repair as nec-
essary then repeat evacuation.

Electrical Connections

WARNING
HIGH VOLTAGE!
Disconnect ALL power before servicing.
Multiple power sources may be present.
Failure to do so may cause property damage,
personal injury or death due to electric shock.
Wiring must conform with NEC or CEC and all
local codes. Undersized wires could cause
poor equipment performance, equipment damage
or fire.
WARNING
To avoid the risk of fire or equipment damage, use
copper conductors.
NOTICE
Units with reciprocating
non-bleed TXV's require a Hard Start Kit.
The condensing unit rating plate lists pertinent electrical data
necessary for proper electrical service and overcurrent protec-
tion. Wires should be sized to limit voltage drop to 2% (max.)
from the main breaker or fuse panel to the condensing unit.
Consult the NEC, CEC, and all local codes to determine the
correct wire gauge and length.
Local codes often require a disconnect switch located near the
unit; do not install the switch on the unit. Refer to the installa-
tion instructions supplied with the indoor furnace/air handler for
specific wiring connections and indoor unit configuration. Like-
wise, consult the instructions packaged with the thermostat
for mounting and location information.

Overcurrent Protection

The following overcurrent protection devices are approved for
use.
• Time delay fuses
• HACR type circuit breakers
These devices have sufficient time delay to permit the motor-
compressor to start and accelerate its load.
Three Phase Compressor Rotation
CAUTION
Use care when handling scroll compressors. Dome temp-
eratures could be hot.
Three phase compressors are power phase dependent and
can rotate in either direction.
Verify proper rotation for three phase compressors by ensuring
the suction pressure drops and discharge pressure rises when
the compressor is energized. NOTE: When operated in re-
verse, a three phase scroll compressors is noisier and its cur-
rent draw substantially reduced compared to marked values.
or rotary compressors and
To correct, disconnect power and switch any two leads at the
unit contactor and re-observe.

High Voltage Connections

Route power supply and ground wires through the high voltage
port and terminate in accordance with the wiring diagram pro-
vided inside the control panel cover.

Low Voltage Connections

The indoor transformer must supply 24 volt AC low voltage
power to the outdoor section for the control wiring. Cooling
only units require 25VA minimum and heat pump units require
40VA minimum. Low voltage wiring for two-stage units de-
pends on the thermostat used and the number of control wires
between the indoor unit and the condensing unit. Route con-
trol wires through the low voltage port and terminate in accor-
dance with the wiring diagram provided inside the control panel
cover.
SYSTEM COMPOSITE DIAGRAM
HEAT PUMPS
10 KW & BELOW
HEAT PUMP
C W2 O Y R Y
O
B W Y R
L H R E E
U I A L D
E T N L
R
E G O
E W
Y
O
W
BL
#18 GA. 5 WIRE
2 1
(OPTIONAL)
OUTDOOR THERMOSTAT
CLOSE ON TEMPERATURE FALL
SYSTEM COMPOSITE DIAGRAM
HEAT PUMPS
ABOVE 10 KW
HEAT PUMP
C W2 O Y R Y
B W O Y R
L H R E E
U I A L D
E T N L
R
E G O
E W
Y
O
W
BL
#18 GA. 5 WIRE
2 1
OT-1
2 1
OT-2
(OPTIONAL)
OUTDOOR THERMOSTAT
CLOSE ON TEMPERATURE FALL
NOTES:
1) OUTDOOR THERMOSTAT (OT-1) SHOULD BE THE
FIRST TO CLOSE AND THE LAST TO OPEN.
2) CONNECT WHITE AND BROWN WIRES FROM AIR-
HANDLER TOGETHER IF OT-2 IS NOT USED.
3) REMOVE WIRE WHEN USING OUTDOOR THERMOSTAT
4) TERMINAL BLOCK MARKINGS ARE FOR AMANA
AIRHANDLERS.
with Low Voltage Wires to Heat Pump Unit
NOTE: For two-stage units, refer to the Installation Instructions
supplied with the variable speed indoor units for field wiring
connections.
System Start Up
NOTE: Units with crankcase heaters should have high
voltage power energized for 24 hours prior to start up.
Heat pumps are equipped with a time/temperature defrost
control with field selectable defrost intervals of 30, 60, or
5
TYPICAL H/P
#18 GA. 7 WIRE
ROOM THERMOSTAT
INDOOR UNIT
O C W2 G R E
R
R R RED
G G G GREEN
SEE
NOTE
BR W WHITE
#3 W2
W
BL C BLUE
BL
SEE NOTE #4
#18 GA. 6 WIRE NEEDED WHEN OT IS USED
TYPICAL H/P
#18 GA. 7 WIRE
ROOM THERMOSTAT
INDOOR UNIT
O C W2 G R E
R
R R RED
BR
G G G GREEN
SEE
NOTE
#3 W WHITE
W2
SEE
NOTE
#2
1
2
EHR BROWN
BR W3
3 4
C
BL BLUE
BL
SEE NOTE #4
#18 GA. 7 WIRE NEEDED WHEN TWO OT'S ARE USED
NOMENCLATURE
OT ---OUTDOOR THERMOSTAT (OPTIONAL)
EHR -EMERGENCY HEAT RELAY (OPTIONAL)
Thermostat
COLOR CODES
R --RED
Y --YELLOW
BL-BLUE
BR-BROWN
O --ORANGE
W -WHITE
G --GREEN