62
Installation, Operation & Maintenance - HKV Series
Unit & System Checkout
BEFORE POWERING SYSTEM, please check the
following:
UNIT CHECKOUT
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Line Voltage and Wiring:
Ensure Voltage is within an
acceptable range for the unit and wiring and fuses/
breakers are properly sized. Low voltage wiring is
complete.
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Unit Control Transformer: Ensure transformer has
properly selected control voltage tap. 208-230V units
are factory wired for 208V operation unless specified
otherwise.
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Balancing/Shutoff Valves: Ensure all isolation
valves are open (after system flushing - see System
Checkout) water control valves wired and open or
coax may freeze and burst.
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Entering Water and Air: Ensure entering water and air
temperatures are within operating limits of Table 6.
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Low Water Temperature Cutout: Verify low water
temperature cut-out on CXM/DXM2 is properly set.
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Unit Blower Wheel:
Manually rotate blower wheel to
verify free rotation and ensure that all blower wheels
are secured to blower shaft and centered in housing.
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Blower Motor: Verify motor bolts are tight. DO NOT
oil motors upon start-up. Fan motors are pre-oiled at
factory.
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Check shaft pillow blocks, sheave and pulley are tight
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Verify sheave has been set to turns in design
requirement. Record turns on start up log sheet.
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Verify belt is straight and proper tension
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Condensate Line: Condensate line is open, trapped,
vented, and properly pitched toward drain.
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Water Flow Balancing:
Verify inlet and outlet water
temperatures are recorded for each heat pump upon
startup. This check can eliminate nuisance trip outs
and high velocity water flows that can erode heat
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WARNING!
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WARNING!
Verify ALL water controls are open and allow
water flow prior to engaging the compressor. Freezing of the
coax or water lines can permanently damage the heat pump.
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WARNING!
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WARNING!
To avoid equipment damage, DO NOT leave
system filled in a building without heat during the winter
unless antifreeze is added to system water. Condenser
coils never fully drain by themselves and will freeze unless
winterized with antifreeze.
exchangers.
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Unit Air Coil & Filters: Ensure filter is clean and
accessible. To obtain maximum performance and
avoid possible condensate blow-off the coil should
be cleaned using a 10% solution of dish washing
detergent.
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Unit Controls: Verify CXM or DXM2 field selection
options are proper and complete.
SYSTEM CHECKOUT
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System Water Temperature: Check water temperature
for proper range and also verify heating and cooling
setpoints for proper operation.
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System pH: System water pH is 7.5 - 8.5. Proper pH
promotes longevity of hoses and fittings.
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System Flushing: Verify all hoses are connected end to
end when flushing to ensure debris bypasses unit heat
exchanger and water valves etc. Water used in the
system must be potable quality initially and clean of
dirt, piping slag, and strong chemical cleaning agents.
Verify all air is purged from the system. Air in the
system can cause poor operation or system corrosion.
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Cooling Tower/Boiler: Check equipment for proper
setpoints and operation.
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Standby Pumps: Verify the standby pump is properly
installed and in operating condition.
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System Controls: Verify system controls function and
operate in the proper sequence.
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Low Water Temperature Cutout: Verify low water
temperature cut-out controls are provided for the
outdoor portion of the loop or operating problems
will occur.
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System Control Center: Verify control center and
alarm panel for proper setpoints
and operation (if used).
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Miscellaneous: Note any questionable aspects of the
installation.
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Log Data: Record data on startup log sheet in this
manual or on web site. keep log for future reference.
WARNING!
Polyolester Oil, commonly known as POE oil, is
a synthetic oil used in many refrigeration systems including
those with HFC-410A refrigerant. POE oil, if it ever comes
in contact with PVC or CPVC piping, may cause failure of
the PVC/CPVC. PVC/CPVC piping should never be used
as supply or return water piping with water source heat
pump products containing HFC-410A as system failures and
property damage may result.
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WARNING!
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