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ambient. Units shall be able to operate down to 0° F
when equipped with low ambient option.
I. Controls and Safeties:
1. Units shall be furnished with a control terminal
block for connection of low voltage controls
and thermostats.
2. Unit shall require a room-mounted thermostat
mounted in the conditioned space. Thermostat
shall be digital type. Thermostat shall control
fan operation and be capable of turning unit on
and off.
3. Units shall have the following factory-
installed safeties:
a. High and low-pressure switches.
b. Motor and compressor overtemperature.
c. Current lockout.
d. Inherent automatic fan motor overload.
J. Electrical Requirements:
All electrical power wiring shall enter the unit cabi-
net at a single location. Control circuit is 24-v, suit-
able for a field-supplied 24-v thermostat.
K. Refrigerant Components:
Refrigerant circuit components include thermal
expansion valves, distributor with nozzle, filter dri-
ers, and charging service valves on each circuit.
Suction line shall have a refrigerant loop to prevent
refrigerant drain back to the compressor. Suction
piping shall be insulated with closed cell piping
insulation.
