Installation guide

9
Table 5 – Accessory Usage
ACCESSORY
REQUIRED FOR LOW--- AMBIENT
COOLING APPLICATIONS
(Below 55F/12.8_C)
REQUIRED FOR LONG LINE
APPLICATIONS*
REQUIRED FOR
SEA COAST
APPLICATIONS
(Within 2 miles/3.22 km)
Ball Bearing F an Motor Ye s{ No No
Compressor Start Assist Capacitor and Relay Ye s Ye s No
Crankcase Heater Ye s Ye s No
Evaporator Freeze Thermostat Ye s No No
H a r d S h u t --- O f f T X V Ye s Ye s Ye s
Liquid Line Solenoid Valve No No No
Motor Master

or Low --- ambient Pressure Switch Ye s] No No
Support Feet Recommended No Recommended
Winter Start Control Ye s No No
* For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) a nd/or 35 ft. (10.7 m) vertical differential, refer to Residential Piping and Longline Guideline.
{ Additi onal requirement for Low ---Ambient Controller (full modulation feature) MotorMasterr Control.
} If unit equipped with ECM OD motor, both motor and fan need to be replaced per unit accessory guide to work properly. Unit will not meet AHRI rated
efficiency once motor and fan are replaced to use this accessory.
24 VAC HOT
24 VAC COM
R
C
G
W/W1
Y/Y2
R
C
C
A/C
THERMOSTAT
Typical
FAN COIL
AIR
CONDITIONER
G
W2
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
24 VAC HOT
24 VAC COM
R
C
G
W/W1
Y/Y2
R
C
C
A/C
THERMOSTAT
Typical
FURNACE
AIR
CONDITIONER
Y
G
W
HEAT STAGE 1
COOL STAGE 1
INDOOR FAN
A02326
LEGEND
24-V FACTORY WIRING
24-V FIELD WIRING
FIELD SPLICE CONNECTION
CONTACTOR
C
A97368
Fig. 7 -- Generic Wiring Diagrams
(See Thermostat Installation Instruction
for specific unit combinations)