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HEAT CONTROLLER, INC. WATER-SOURCE HEAT PUMPS
Residential Split - 60Hz R22 &R410A
Rev.: 5 June, 2008
34
Heat Controller, Inc. Water-Source Heating and Cooling Systems
CXM Thermostat Details
Thermostat Compatibility - Most all heat pump thermostats
can be used with the CXM control. However Heat/Cool stats
are NOT compatible with the CXM.
Anticipation Leakage Current - Maximum leakage current
for "Y" is 50 mA and for "W" is 20mA. Triacs can be used
if leakage current is less than above. Thermostats with
anticipators can be used if anticipation current is less than
that specified above.
Thermostat Signals -
• "Y" and "W" have a 1 second recognition time when
being activated or being removed.
• "O" and "G" are direct pass through signals but are
monitored by the micro processor.
• "R" and "C" are from the transformer.
• "AL1" and "AL2" originate from the alarm relay.
• "A" is paralleled with the compressor output for use
with well water solenoid valves.
• The "Y" 1/4" quick connect is a connection point to the
"Y" input terminal P1 for factory use. This "Y" terminal
can be used to drive panel mounted relays such as the
loop pump relay.
CXM Controls
Table 10: Nominal resistance at
various temperatures
ϒ ϒ ϒ ϒ