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)
AccuRater
T
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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