c l i m a t e m a s t e r.c o m
67
TSM/TSL Vertical Stack
R e v. : J a n u a r y 1 8 , 2 0 2 1
T H E S M A R T S O L U T I O N F O R E N E R G Y E F F I C I E N C Y
Unit and System Checkout
CAUTION!
To avoid possible damage to a plastic (PVC) piping
system, do not allow temperatures to exceed 110ºF (43ºC).
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CAUTION!
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Note: The manufacturer strongly recommends all piping
connections, both internal and external to the unit, be
pressure tested by an appropriate method prior to any
finishing of the interior space or before access to all
connections is limited. Test pressure may not exceed
the maximum allowable pressure for the unit and all
components within the water system. The manufacturer
will not be responsible or liable for damages from water
leaks due to inadequate or lack of a pressurized leak
test, or damages caused by exceeding the maximum
pressure rating during installation.
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.
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CAUTION!
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CAUTION!
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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.
BEFORE POWERING SYSTEM, please check the following:
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 ensure 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.
Cooling tower/boiler:
Check equipment for proper
set points and operation.
Standby pumps:
Verify that the standby pump is
properly installed and in operating condition.
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 provided for
the outdoor portion of the loop. Otherwise, operating
problems may occur.
System control center:
Verify that the control center
and alarm panel have appropriate set points and are
operating as designed.
Miscellaneous:
Note any questionable aspects of
the installation.
UNIT CHECKOUT
Balancing/shutoff valves:
Ensure 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:
Ensure that transformer
has the properly selected voltage tap. Commercial
208-230V units are factory wired for 208V.
Entering water and air:
Ensure that entering water
and air temperatures are within operating limits of
Tables 11 & 12.
Low water temperature cutout:
Verify that low
water temperature cut-out on the CXM/DXM2 control
is properly set.
Unit fan:
Manually rotate fan to verify free rotation
and ensure 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.
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:
Ensure that filter is clean and
accessible. Clean air coil of all manufacturing oils.
Unit controls:
Verify that CXM or DXM2 field
selection options are properly set.
