HTV/HTD/HTH SERIES Heat Controller, Inc.
37
UNIT AND SYSTEM CHECKOUT
Unit and System Checkout:
BEFORE POWERING SYSTEM, please
check the following:
UNIT CHECKOUT
⌧ Balancing/shutoff valves: Insure that all
isolation valves are open and water
control valves are wired.
⌧ Line voltage and wiring: Verify that
voltage is within an acceptable range for
the unit and wiring and fuses/breakers
are properly sized. Verify that low
voltage wiring is complete.
⌧ Unit control transformer: Insure that
transformer has the properly selected
voltage tap.
⌧ Entering water and air: Insure that
entering water and air temperatures are
within operating limits of Table 7.
⌧ Low water temperature cutout: Verify
that low water temperature cut-out on the
CXM control is properly set.
⌧ Unit fan: Manually rotate fan to verify
free rotation and insure that blower wheel
is secured to the motor shaft. Be sure to
remove any shipping supports if needed.
T
CAUTION! To avoid possible
damage to a plastic (PVC) piping
system, do not allow temperatures to
exceed 113°F.
DO NOT use “Stop Leak” or similar
chemical agent in this system.
Addition of chemicals of this type to
the loop water will foul the heat
exchanger and inhibit unit operation.
DO NOT oil motors. Check unit fan speed
selection and compare to design
requirements.
⌧ Condensate line: Verify that condensate
line is open and properly pitched toward
drain.
⌧ Water flow balancing: Record inlet and
outlet water temperatures for each heat
pump upon startup. This check can
eliminate nuisance trip outs and high
velocity water flow that could erode heat
exchangers.
⌧ Unit air coil and filters: Insure that filter
is clean and accessible. Clean air coil of
all manufacturing oils.
⌧ Unit controls: Verify that CXM field
selection options are properly set.
SYSTEM CHECKOUT
⌧ System water temperature: Check
water temperature for proper range and
also verify heating and cooling set points
for proper operation.
⌧ System pH: Check and adjust water pH
if necessary to maintain a level between
6 and 8.5. Proper pH promotes
longevity of hoses and fittings (see Table
3).
⌧ System flushing: Verify that all hoses
are connected end to end when flushing
to insure that debris bypasses the unit
heat exchanger, water valves and other
components. Water used in the system
must be potable quality initially and clean
of dirt, piping slag, and strong chemical
cleaning agents. Verify that all air is
purged from the system. Air in the
system can cause poor operation or
system corrosion.
⌧ CAUTION! ⌧
UNIT STARTING AND OPERATING CONDITIONS
Unit Starting And Operating Conditions
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