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ACCESSORY USAGE GUIDELINE
ACCESSORY
REQUIRED FOR
LOW-AMBIENT
APPLICATIONS
(BELOW 55°F)
REQUIRED FOR
LONG-LINE
APPLICATIONS*
(OVER 50 FT)
REQUIRED FOR
BURIED LINE
APPLICATIONS†
(OVER 3 FT)
REQUIRED FOR
SEA COAST
APPLICATIONS
(WITHIN 2 MILES)
Crankcase Heater Yes Yes Yes No
Evaporator Freeze Thermostat Yes No No No
Winter Start Control Yes‡ No No No
Accumulator No No Yes No
Compressor Start Assist
Capacitor and Relay
Yes Yes Yes No
Low-Ambient Controller,
MotorMaster® Control,
or
Low-Ambient Pressure Switch
Yes No No No
Wind Baffle See Low-Ambient Instructions No No No
Coastal Filter No No No Yes
Support Feet Recommended No No Recommended
Liquid-Line Solenoid Valve
or
Hard Shutoff TXV
No
See Long-Line
Application
Guideline
Yes No
Ball Bearing Fan Motor Yes** No No No
* For tubing line sets between 50 and 175 ft, refer to the Application Guideline and Service Manual for Residential Split-System Air Conditioners and Heat Pumps using
R-410A Refrigerant.
† For buried line applications, refer to Residential Split System Buried-Line Application Guideline.
‡ Only when low-pressure switch is used.
** Required for Low-Ambient Controller (full modulation feature) and MotorMaster® Control only.
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