THE SMART SOLUTION FOR ENERGY EFFICIENCY
Tranquility
®
Compact Belt Drive (TCH/V) Series
Rev.: July 25, 2017
43
climatemaster.com
Electrical - Low Voltage Wiring
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. Figure 18 shows typical wiring for a 24VAC
external solenoid valve. This wiring should only be used
if valve fully opens in 15 second. Figure 19 illustrates a
typical slow closing water control valve wiring for Belimo
valves. Slow closing valves take approximately 60 seconds
to open (very little water will fl ow before 45 seconds).
Once fully open, an end switch allows the compressor
to be energized. Only relay or triac based electronic
thermostats should be used with slow closing valves.
When wired as shown, the slow closing valve will operate
properly with the following notations:
1. The valve will remain open during a unit lockout.
2. The valve will draw approximately 25-35 VA through
the “Y” signal of the thermostat.
Note: This valve can overheat the anticipator of an
electromechanical thermostat. Therefore, only relay or
triac based thermostats should be used.
Figure 19: Optional Motorized Water Valve Wiring
C
C
Thermostat
Y1
1
2
3
Y1
23B0040N01
for 072 and 096
or 23B0041N01
for 120 Valve
Switch
CAUTION!
CAUTION! Many units are installed with a factory or fi eld
supplied manual or electric shut-off valve. DAMAGE WILL
OCCUR if shut-off valve is closed during unit operation. A
high pressure switch must be installed on the heat pump side
of any fi eld provided shut-off valves and connected to the
heat pump controls in series with the built-in refrigerant circuit
high pressure switch to disable compressor operation if water
pressure exceeds pressure switch setting. The fi eld installed
high pressure switch shall have a cut-out pressure of 300
psig and a cut-in pressure of 250 psig. This pressure switch
can be ordered from ClimateMaster with a 1/4” internal fl are
connection as part number 39B0005N02.
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