5
Accessory usage guideline
* For tubing lines sets between 50 and 175 ft, refer to the Residential Split-System Long-Line Application Guideline.
† Only when low-pressure switch is used.
‡ Required for Low-Ambient Controller (full modulation feature) and MotorMaster® Control only.
Accessory description and usage (Listed alphabetically)
1.
Ball Bearing Fan Motor
A fan motor with ball bearings which permits speed reduction while maintaining bearing lubrication.
SUGGESTED USE: Required on all units where Low-Ambient Controller (full modulation feature) or MotorMaster® Control has been added.
2.
Coastal Filter
A mesh screen inserted under the top cover and inside the base pan to protect the condenser coil from salt damage without restricting airflow.
SUGGESTED USE: In geographic areas where salt damage could occur.
3.
Compressor Start Assist — Capacitor and Relay
Start capacitor and start relay gives “hard” boost to compressor motor at each start-up.
SUGGESTED USE: Installations where interconnecting tube length exceeds 50 ft.
Installations where outdoor design temperature exceeds 105°F (40.6°C).
Installations where Liquid-Line Solenoid Valve has been added.
4.
Compressor Start Assist — PTC
Solid state electrical device which gives a “soft” boost to compressor at each start-up.
SUGGESTED USE: Installations with marginal power supply.
Replacement installations with rapid pressure balance (RPB) expansion valve on indoor coil.
Replacement installations with undersized interconnecting refrigerant tubes.
5.
Crankcase Heater
An electric resistance heater which mounts to the base of the compressor to keep the lubricant warm during off cycles. Improves compressor lubrication on
restart and minimizes chance of refrigerant slugging. May or may not include a thermostat control. (Thermostat control standard on 048 and 060 sizes.)
SUGGESTED USE: When interconnecting tube length exceeds 50 ft.
When unit will be operated below 55°F (12.8°C) outdoor air temperature. (Use with Low-Ambient Controller.)
All commercial installations.
6.
Cycle Protector
Solid-state timing device which prevents compressor rapid recycling. Control provides an approximate 5-minute delay after power to the compressor has been
interrupted for any reason, including normal room thermostat cycling.
SUGGESTED USE: Installations in areas where power interruptions are frequent.
Where user is likely to “play” with the room thermostat.
All commercial installations.
Installations where interconnecting tube length exceeds 50 ft.
High-rise applications.
7.
Evaporator Freeze Thermostat
An SPST temperature actuated switch which stops unit operation when evaporator reaches freeze-up conditions.
SUGGESTED USE: All units where Winter Start Control has been added.
8.
Filter Drier
A device for removing contaminants from refrigerant circulating in an air conditioner: 1-direction flow. (Filter drier standard on 048 and 060 sizes.)
9.
Inlet Grille Kit
A field-installed enhanced inlet grille to replace the standard inlet grille on residential air conditioners and heat pumps.
SUGGESTED USE: For greater protection against inclement weather, incidental damage, and vandalism.
ACCESSORY
REQUIRED FOR
LOW-AMBIENT
APPLICATIONS
(Below 55°F)
REQUIRED FOR
LONG-LINE
APPLICATIONS*
(Over 50 Ft)
REQUIRED FOR
SEA COAST
APPLICATIONS
(Within 2 Miles)
Crankcase Heater
Yes
Yes
No
Evaporator Freeze Thermostat
Yes
No
No
Winter Start Control
Yes†
No
No
Accumulator
No
No
No
Compressor Start Assist
Capacitor and Relay
Yes
Yes
No
Low-Ambient Controller,
MotorMaster® Control
or
Low-Ambient Pressure Switch
Yes
No
No
Wind Baffle
See Low-Ambient Instructions
No
No
Coastal Filter
No
No
Yes
Support Feet
Recommended
No
Recommended
Liquid-Line Solenoid Valve
or
Hard Shutoff TXV
No
See Long-Line
Application
Guideline
No
Ball Bearing Fan Motor
Yes‡
No
No
