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Application Considerations
CA Model
CA Model
8733942456 (2016/04)
Subject to change without prior notice
APPLICATION CONSIDERATIONS
Well Water Systems
Copper is adequate for ground water that is not high in
mineral content. Should your well driller express
concern regarding the quality of the well water available
or should any known hazards exist in your area, we
recommend proper testing to assure the well water
quality is suitable for use with water-source equipment.
In conditions anticipating moderate scale formation or in
brackish water a cupro-nickel heat exchanger is
recommended.
Refer to Water Quality Table on page # 12.
In well water applications water pressure must always
be maintained in the heat exchanger. This can be
accomplished with either control valve or a bladder type
expansion tank. When using a single water well to supply
both domestic water and the heat pump, care must be
taken to ensure that the well can provide sufficient flow
for both.
Solenoid valves should be connected across Y and C on
the Terminal block. Make sure that the VA draw of the
valve does not exceed the contact rating of the
thermostat.
Low Temperature Loop Application
In applications where fluid temperatures may fall below
40 F in a ground water or ground loop applications using
a console equipped with a CUC controller the freeze stat
will need to be bypassed from the controls circuitry. To
accomplish this, follow instructions below:
Figure # 5
Locate High Pressure and Freeze Stat mated wires
labeled A&B, respectively. (see figure # 5)
Figure # 6
Disconnect Yellow wire labeled A from black wire
labeled B (see figure # 6)
Figure # 7
Locate High Pressure and Freeze Stat mated wires
labeled D&C, respectively. (see figure # 7)
Figure # 8
Disconnect Yellow wire labeled B from Black wire
labeled C.(see figure # 8)
NOTICE:
In well water applications a slow
closing solenoid valve must be used to
prevent water hammer.
