Low Water Temperature Cutout Selection; Electrical - Low Voltage Wiring - Rheem RPVS Series Installation, Operation & Maintenance Instructions Manual

R e s i d e n t i a l S p l i t
R e v. : 1 3 M a r c h , 2 0 1 5

Electrical - Low Voltage Wiring

Thermostat Connections
The thermostat should be wired to the air handler with
appropriate connections also made to the ICC control module
in the compressor section. Typical thermostat wiring is shown
in Figure 20. Note that the air handler or furnace transformer
will be used to power the ICC board in the compressor
section.
Figure 19: RPVS Low Voltage Field Wiring
To "C" on HWG Controller
To "CC" on HWG Controller
Thermostat Connections
The thermostat should be wired to the air handler with
appropriate connections also made to the ICC control module
in the compressor section. Typical thermostat wiring is shown
in Figure 20. Note that the air handler or furnace transformer
will be used to power the ICC board in the compressor section.
Figure 20: RPVE Low Voltage Field Wiring
30

Low Water Temperature Cutout Selection

Low Air Temperature Sensor Installation
After mounting the FP2 sensor in the air handler connect the
sensor wiring to the violet wires in the compressor section's
control box as shown in Figure 20. Remove the violet wire
loop from the FP2 connector on the ICC control. Connect
the violet leads from FP2 to the FP2 connection on the ICC
control. FP2 sensor is packed inside the compressor section
control box.
Low Water Temperature Cutout Selection
The ICC control allows the fi eld selection of low water (or
water-antifreeze solution) temperature limit by clipping jumper
JW1, which changes the sensing temperature associated with
thermistor FP1. Note that the FP1 thermistor is located on
the refrigerant line between the coaxial heat exchanger and
expansion device (TXV). Therefore, FP1 is sensing refrigerant
temperature, not water temperature, which is a better indication
of how water fl ow rate/temperature is aff ecting the refrigeration
circuit.
The factory setting for FP1 is for systems using water (30°F
[-1.1°C] refrigerant temperature). In low water temperature
(extended range) applications with antifreeze (most ground
loops), jumper JW1 should be clipped as shown in Figure
22 to change the setting to 10°F [-12.2°C] refrigerant
temperature, a more suitable temperature when using
an antifreeze solution. All residential units include water/
refrigerant circuit insulation to prevent internal condensation,
which is required when operating with entering water
temperatures below 59°F [15°C].