Specifications
PHYSICAL DATA — 538D018,024 AND 538B OUTDOOR HEAT PUMP UNITS (cont)
UNIT
538B036
(3-Phase)
538B048 538B060
NOMINAL CAPACITY (Tons) 345
OPERATING WEIGHT (lb) 249 252 272
REFRIGERANT TYPE R-22
Control (Cooling) AccuRater® Piston at Fan Coil Unit
AccuRater Piston at Outdoor Unit
2.0
Control (Heating)
Factory Charge (lb)*
COMPRESSOR
Type Copeland Reciprocating Tecumseh Reciprocating Copeland Reciprocating
Model CRH3-0275 AV5549G CRP5-0450
Oil (Recharge) (oz) 51 50 66
CRANKCASE HEATER
Watts 40 27 40
OUTDOOR FAN Propeller, Direct Drive
Rpm 850 850 850
Diameter (in.)...No. of Blades 24...3 24...3 24...3
Pitch (Degrees) 24 24 24
Motor Hp
1
⁄
4
1
⁄
4
1
⁄
4
Nominal Air Cfm 3900 3900 3900
OUTDOOR COIL Copper Tube, Aluminum Fin
Face Area (sq ft)...No. of Coils 12.3...2 12.3...2 12.3...3
Fins/in. 15 15 15
CONTROLS
High-Pressure (psig)
Cutout 320±20
Cut-in 426 ± 7
Liquid Line Low-Pressure (psig)
Cutout 7± 3
Cut-in 22 ± 5
Fusible Plug 210 F
Defrost Method Time and Temperature
Accumulator Yes
Control Voltage† 24 v
REFRIGERANT LINES
Connection Type Sweat—Suction; Flare—Liquid
Liquid Line OD (in.)
3
⁄
8
3
⁄
8
3
⁄
8
Vapor Line OD (in.)
3
⁄
4
7
⁄
8
1
1
⁄
8
**
Maximum Length (ft) 200 200 200
Maximum Lift Fan Coil (Above) (ft) 65 65 65
Maximum Lift Fan Coil (Below) (ft) 150 150 150
EXTERNAL FINISH Alpine Mist (Beige)
*See Piston Guide tables on page 67 for proper charge. These units are shipped with a holding charge only.
†A 24-v transformer is provided in the fan coil unit.
**Valve connection is
7
⁄
8
inch. Recommended line size is 1
1
⁄
8
inch.
13