Carrier 38BYC Product Data page 6

Accessory description and usage (continued)
11. Liquid Solenoid Valve (LSV)
An electrically operated shutoff valve installed at the outdoor unit which stops and starts refrigerant liquid flow in response to compressor operation. Maintains a
column of refrigerant liquid ready for action at next compressor operation cycle.
NOTE:Compressor Start Assist — Capacitor and Relay must also be used.
SUGGESTED USE: For improved system performance in air conditioners for certain combinations of indoor and outdoor units. Refer to ARI Unitary Directory.
In certain long-line applications. Refer to Long-Line Application Guideline.
12. MotorMaster® Control
A fan speed control device activated by a temperature sensor. Designed to control condenser fan motor speed in response to the saturated, condensing temperature
during operation in cooling mode only. For outdoor temperatures down to –20°F, it maintains condensing temperature at 100°F ± 10°F.
SUGGESTED USE: Cooling operation at outdoor temperatures below 55°F.
All commercial installations.
13. Outdoor Thermostat
An SPDT temperature actuated switch which turns on supplemental electric heaters when outdoor air temperature drops below set point.
SUGGESTED USE: Heat pump installations with multiple-stage supplemental heaters.
Used with KHAIC0101AAA (Interface Control).
14. Secondary Outdoor Thermostat
An SPDT temperature actuated switch which turns on a third stage of supplemental electric heaters when outdoor air temperature drops below the second-stage
set point.
SUGGESTED USE: Heat pump installations where 3-stage operation of supplemental heaters is desired.
15. Sound Hood
Wraparound sound attenuation cover for the compressor. Reduces the sound level by about 2 dBA.
SUGGESTED USE: Unit installed closer than 15 ft to quiet areas — bedrooms, etc.
Unit installed between 2 houses less than 10 ft apart.
16. Thermostatic Expansion Valve (TXV)
A modulating flow-control valve which meters refrigerant liquid flow rate into the evaporator in response to the superheat of the refrigerant gas leaving the evap-
orator. Kit includes valve, adapter tubes, and external equalizer tube. Both hard shutoff and RPB valves are available.
SUGGESTED USE: For improved system performance in cooling mode for certain combinations of indoor and outdoor units. Refer to ARI Unitary Directory.
Required for use on all zoning systems.
17. Time-Delay Relay
An SPST delay relay which briefly continues operation of the indoor blower motor to provide additional cooling after the compressor cycles off.
SUGGESTED USE: For improved efficiency ratings for certain combinations of indoor and outdoor units. Refer to ARI Unitary Directory.
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