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CONTROLS
OPERATING SEQUENCE
Cooling
1. Thermostat calls for cooling.
a. Indoor (evaporator) fan relay is energized and starts
evaporator fan.
b. Compressor contactor is energized to start compressor
and condenser fan (up to a 5-minute delay on single-
phase units).
2. When room thermostat is satisfied, the evaporator fan, com-
pressor, and condenser fan shut off.
Continuous Fan Operation —
The thermostat can be set for
continuous operation by setting the fan switch to ON.
ELECTRICAL DATA
LEGEND
*Optional evaporator-fan motor nameplate data.
ELECTRIC HEATER DATA
LEGEND
*May be field converted to single-phase units, see electric heat installa-
tion instructions.
NOTE:
Separate power source is required for all heaters. Control from
base unit 502A (24 v).
UNIT
502A
V-PH
(60 Hz)
VOLTAGE RANGE COMPRESSOR
FAN MOTORS POWER SUPPLY
Evaporator Condenser
Min Ckt
Amps
MOCP
Amps
Min Max RLA LRA Hp FLA Hp FLA
024
230-1 207 254 11.5 62.5 .17 1.10 .50 3.40 19.1 25
036
230-1 207 254 17.2 96.0 .50 3.20 .75 6.06 29.5 40
208/230-3 187 254 10.2 77.0 .50 3.20 .75 3.93 19.9 25
460-3 414 508 4.3 37.0 .50 1.50 .75 1.97 8.8 15
048
230-1 207 254 23.7 129.0 .75 4.00 1.0 8.35 42.0 60
208/230-3 187 254 13.5 99.0 .75 4.00 1.0 3.93 24.8 35
460-3 414 508 7.4 49.5 .75 2.15 1.0 1.97 13.4 15
575-3 518 632 5.8 40.0 .75 1.40 1.0 1.45 10.1 15
048*
208/230-3 187 254 13.5 99.0 1.5 5.60 1.0 3.93 26.4 35
460-3 414 508 7.4 49.5 1.5 2.80 1.0 1.97 14.0 20
060
230-1 207 254 28.8 169.0 .75 4.00 1.5 9.50 49.5 70
208/230-3 187 254 17.3 123.0 .75 4.00 1.5 4.82 30.4 45
460-3 414 508 9.0 62.0 .75 2.15 1.5 2.41 15.8 25
575-3 518 632 7.1 50.0 .75 1.40 1.5 1.90 12.2 20
060*
208/230-3 187 254 17.3 123.0 1.5 5.60 1.5 4.82 32.0 40
460-3 414 508 9.0 62.0 1.5 2.80 1.5 2.41 16.5 25
HACR —
Heating, Air Conditioning, and Refrigeration
Hp —
Horsepower
FLA —
Full Load Amps
LRA —
Locked Rotor Amps
MOCP —
Maximum Overcurrent Protection (HACR breaker)
RLA —
Rated Load Amps
ELECTRIC HEATER
UNIT 88EN
USED WITH
UNIT 502A
V-PH
(60 Hz)
CAP. (kW)
BRANCH CIRCUIT
Heater Amps MCA MOCP (Amps)
0050CA01
024, 036
1-Stage Heat
240-1 5.0 20.8 26.0 30
0075CA01
240-1 7.5 31.3 39.1 40
0115CA01
240-1 11.5 47.9 59.9 60
0075EA01
208-3 5.6 15.6 19.5 20
240-3 7.6 18.0 22.6 25
1150EA01
208-3 11.3 31.2 39.0 40
240-3 15.0 36.1 45.1 50
0100EA01
048, 060
2-Stage Heat
208-3 7.5 20.8 26.0 30
240-1* 10.0 41.7 52.1 60
240-3 10.0 24.1 30.1 35
0150EA01
208-3 11.3 31.2 39.0 40
240-1* 15.0 62.5 78.1 80
240-3 15.0 36.1 45.1 50
0200EA01
208-3 15.0 41.7 52.1 60
240-1* 20.0 83.3 104.2 110
240-3 20.0 46.9 58.6 60
0300EA01
208-3 22.5 62.5 78.2 80
240-3 30.0 72.2 90.2 100
0300CA01
240-1 30.0 124.0 155.0 175
0100FA01
480-3 10.0 12.0 15.0 15
0150FA01
480-3 15.0 18.1 22.6 25
0200FA01
480-3 20.0 24.1 30.1 35
0300FA01
480-3 30.0 36.1 45.1 50
MCA —
Minimum Circuit Ampacity
MOCP —
Maximum Overcurrent Circuit Protection
(Fuses or Circuit Breaker)