Table 4E — Physical Data — 38BK018, 024 Outdoor Heat Pump Units
UNIT 38BK018* 38BK024*
NOMINAL CAPACITY (Tons) 1
1
⁄
2
2
OPERATING WEIGHT (lb) 154 167
REFRIGERANT TYPE R-22
Control (Cooling) AccuRaterT Piston at Fan Coil Unit
Control (Heating) AccuRater Piston at Outdoor Unit
Factory Charge (lb)† 1.5
COMPRESSOR TYPE Tecumseh Reciprocating
Model AW5519G AW5524G
Oil (Recharge) (oz) 30 30
CRANKCASE HEATER (Watts) 19 19
OUTDOOR FAN Propeller, Direct Drive
Rpm 850 850
Diameter (in.)...No. of Blades 18...3 18...3
Pitch (Degrees) 25 27
Motor Hp
1
⁄
8
1
⁄
8
Nominal Air Cfm 1720 1720
OUTDOOR COIL Copper Tube, Aluminum Fin
Face Area (sq ft)...No. of Coils 6.1...1.5 6.1...2
Fins/in. 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 Defrost
Accumulator Yes
Control Voltage†† 24 v
REFRIGERANT LINES
Connection Type Sweat—Suction; Flare—Liquid
Liquid Line OD (in.)
3
⁄
8
3
⁄
8
Vapor Line OD (in.)
5
⁄
8
5
⁄
8
Maximum Length (ft) 200 200
Maximum Lift (Fan Coil Above) (ft) 65 65
Maximum Lift (Fan Coil Below) (ft) 150 150
*These units may only be used with 40QNE fan coil units.
†These units are shipped with a holding charge only.
**Demand defrost when used with 40QNE fan coil units.
††A 24-v transformer is provided in the fan coil unit; 38BK018 and 024 units have their own transformers.
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