Water Valve Wiring - Rheem RPVS Series Installation, Operation & Maintenance Instructions Manual

Figure 21: FP1 Limit Setting
Figure 22: Two-Stage Piping
Solenoid
Valve
Stage 2
OUT
IN
From Water Source
NOTE: Shut-off valves, strainers and
other required components not shown.
Water Solenoid Valves
An external solenoid valve(s) should be used on ground water
installations to shut off fl ow to the unit when the compressor
is not operating. A slow closing valve may be required to
help reduce water hammer.
RPV split system units should be designed with two parallel
valves for ground water applications to limit water use during
fi rst stage operation. For example, at 1.5 gpm/ton [2.0
l/m per kW], a RPV 048 unit requires 6 gpm [23 l/m] for full
load (2nd stage) operation, but only 4 gpm [15 l/m] during
1st stage operation. Since the unit will operate on fi rst
stage 80-90% of the time, signifi cant water savings can be
realized by using two parallel solenoid valves with two fl ow
regulators. In the example above, stage one solenoid would
be installed with a 4 gpm [15 l/m] fl ow regulator on the outlet,
while stage two would utilize a 2 gpm [8 l/m] fl ow regulator.
When stage one is operating, the second solenoid valve will
be closed. When stage two is operating, both valves will be
open, allowing full load fl ow rate. Figure 22 illustrates piping
for two-stage solenoid valves. NOTE: when EWT is below
50ºF [10ºC], a minimum of 2 gpm per ton [2.6 l/m per kW] is
required.
Figure 23 shows typical wiring for 24 VAC external solenoid
valves. Figures 24 and 25 illustrate typical wiring utilizing
slow closing water control valves. When standard water
solenoid valves are used, dipswitch SW1-2 on the ICC
Flow
Regulator
To Discharge
Stage 1
Electrical - Low Voltage Wiring

Water Valve Wiring

control should be in the ON position. When a slow closing
water control valve is used, dipswitch SW1-2 on the ICC
control must be placed in the OFF position. See Figure 23
for the position of dipswitch SW1-2 on the ICC control.
Figure 23: Typical Water Valve Wiring
Figure 24: AMV Valve Wiring
Figure 25: Taco SBV Valve Wiring
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
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