Product data

F. Refrigeration Components:
Refrigerant circuit components shall include brass external liquid line service
valve with service gage port connections, suction line service valve with service
gage connection port, service gage port connections on compressor suction and
discharge lines with Schrader type fittings with brass caps, accumulator, pressure
relief, and a full charge of refrigerant.
G. Controls and Safeties:
Operating controls and safeties shall be factory selected, assembled, and tested.
The minimum control functions shall include the following:
1. Controls:
a. Time delay restart to prevent compressor reverse rotation on single-phase
scroll compressors.
b. Automatic restart on power failure.
c. Safety lockout if any outdoor unit safety is open.
d. A time delay control sequence provided through the fan coil board,
thermostat, or controller.
e. High-pressure and liquid line low-pressure switches (HDC).
f. Liquid line low-pressure switches (HDL).
g. Automatic outdoor-fan motor protection.
h. Start capacitor and relay (single-phase units without scroll compressors).
2. Safeties:
a. System diagnostics.
b. Compressor motor current and temperature overload protection.
c. High-pressure relief.
d. Outdoor fan failure protection.
H. Electrical Requirements:
1. Nominal ¾ ton unit shall operate on single-phase, 60 Hz power at 115 v.
HDC units shall operate on single or three-phase, 60-cycle power at 208/230 v
or 460v
HDL units shall operate on single-phase, 60-cycle power at 208/230 v
2. Unit electrical power shall be a single point connection.
3. Unit control voltage to the indoor-fan coil shall be 24 v, except 38AN009, 012
units which shall supply line voltage.
4. All power and control wiring must be installed per NEC and all local building
codes.
5. High and low voltage terminal block connections.
I. Special Features (Field Installed):
Certain features are not applicable 38AN series. For assistance in amending the
specifications, contact your local Carrier Sales office.
1. Low-Ambient Kit:
Control shall regulate fan-motor cycles in Reponses to saturated condensing,
pressure of the unit. The control shall be capable of maintaining a condensing
temperature of 100 F ± 10 F with outdoor temperatures to –20 F. Installation
of kit shall not require changing the outdoor-fan motor. MORE ON NEXT PAGE