Unit Starting And Operating Conditions - Heat Controller HP Series Installation, Operation & Maintenance Manual

Installation, Operation & Maintenance
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. Residential
208-230V units are factory wired for 230V operation
unless specified otherwise.
� Loop/water piping is complete and purged of air.
Water/piping is clean.
� Antifreeze has been added if necessary.
� 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.
DO NOT oil motors upon start-up. Fan motors are
pre-oiled at the factory. Check unit fan speed selection
and compare to design requirements.
� Condensate line: Verify that condensate line is open
and properly pitched toward drain.
� HWG pump is disconnected unless piping is
completed and air has been purged from the system.
� 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. Low voltage wiring is complete.
� Blower speed is set.
� Service/access panels are in place.
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 air is purged from the
system. Air in the system can cause poor operation
or system corrosion. Water used in the system must
be potable quality initially and clean of dirt, piping
slag, and strong chemical cleaning agents. Some
antifreeze solutions may require distilled water.
� Flow Controller pump(s): Verify that the pump(s) is
wired and in operating condition.

UNIT STARTING AND OPERATING CONDITIONS

limits of Table 9A-B.
HP SerieS
� System controls: Verify that system controls function
and operate in the proper sequence.
� Low water temperature cutout: Verify that low water
temperature cut-out controls are set properly
(FP1 - JW3).
� Miscellaneous: Note any questionable aspects of
the installation.
CAUTION! Verify that ALL water control
valves are open and allow water flow prior
to engaging the compressor. Freezing of the
coax or water lines can permanently damage
the heat pump.
NOTICE! Failure to remove shipping brackets
from spring-mounted compressors will cause
excessive noise, and could cause component
failure due to added vibration.
CAUTION! To avoid equipment damage, DO
NOT leave system filled in a building without
heat during the winter unless antifreeze is
added to the water loop. Heat exchangers
never fully drain by themselves and will freeze
unless winterized with antifreeze.
Unit Start-up Procedure
1. Turn the thermostat fan position to "ON." Blower
should start.
2. Balance air flow at registers.
3. Adjust all valves to their full open position. Turn on the
line power to all heat pump units.
4. Room temperature should be within the minimum-
maximum ranges of Table 7. During start-up checks,
loop water temperature entering the heat pump
should be between 30°F [-1°C] and 95°F [35°C].
5. Two factors determine the operating limits of Heat
Controller heat pumps, (a) return air temperature,
and (b) water temperature. When any one of these
factors is at a minimum or maximum level, the other
factor must be at normal level to insure proper unit
operation.
a. Adjust the unit thermostat to the warmest setting.
Place the thermostat mode switch in the "COOL"
position. Slowly reduce thermostat setting until the
compressor activates.
b. Check for cool air delivery at the unit grille within a
few minutes after the unit has begun to operate.
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� CAUTION! �
� CAUTION! �
Table 9A-B. During start-up checks,
Heat Controller, Inc.
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