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Table 7: Superheat and Subcooling - 100% OA
Table 8: Superheat and Subcooling - Recirculating
Ambient Air
Temperature
95°F 85°F 75°F 65°F 55°F 45°F
Subcooling 10° - 12°F 8° - 10°F 6°F - 10°F
Superheat 8°F - 15°F 6°F - 15°F 6°F - 10°F
Note: Subcooling and superheat readings must be taken with the reheat circuit disabled and in the cooling mode.
Table 9: Superheat and Subcooling - Heat Pump
Ambient Air
Temperature
95°F 85°F 75°F 65°F 55°F 45°F
Subcooling 8° - 12°F 8° - 10°F In Heating Mode
Superheat 6°F - 15°F In Heating Mode
Note: Subcooling and superheat readings must be taken with the reheat circuit disabled and in the cooling mode.
Table 6: Hot Water Heating Coil Flow
Rate and Pressure Drop
Model Cabinet
Nominal GPM
(Water Only)
Pressure Drop
(FT, H2O)
Connection Size
(Sweat, in.)
096 - 120 B 50.0 4.31 1-5/8
150 - 210 C 70.0 6.05 1-5/8
240 - 420 D 120.0 8.21 3-1/8
480 - 840 E 160.0 12.9 3-1/8
Ambient Air
Temperature
95°F 85°F 75°F 65°F 55°F 45°F
Subcooling 8°F - 10°F In Heating Mode
Superheat 10°F - 13°F In Heating Mode
Note 1: Subcooling readings must be taken with the reheat circuit disabled and in the cooling mode.
On water-source units, water regulating valves need to be open 100%
Note 2: Circuit #1 Subcooling and Superheat readings must be taken with circuit #2 disabled/not running.
Note 3: Circuit #2 Subcooling and Superheat readings must be taken with circuit #1 energized/running.
PR Series Installation, Operation, and Maintenance Manual
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