9
Table 6 – 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 Fan Motor
Yes
{
No
No
Compressor Start Assist Capacitor and Relay
Yes
Yes
No
Crankcase Heater
Yes
Yes
No
Evaporator Freeze Thermostat
Yes
No
No
Hard Shut---Off TXV
Yes
Yes
No
Liquid Line Solenoid Valve
No
No
No
Motor Master
or Low---ambient Pressure Switch
Yes
No
No
Support Feet
Recommended
No
Recommended
Winter Start Control
Yes
No
No
* For tubing line sets between 50 and 200 ft. (15.24 and 60.96 m) and/or 20 ft. (6.10 m) vertical differential, refer to Residential Piping and Longline Guideline.
{
Additional requirement for Low---Ambient Controller (full modulation feature) MotorMaster
r
Control.
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)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Catalog No: 24ACA4---ACC4---03SI
Replaces: 24ACC4--- 02SI
