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Maintenance Procedures
CAUTION
Risk of High Pressure Solution!
Failure to relieve pressure gradually could result in
minor to moderate injury and water damage to
equipment.
Water/glycol mixture can be under considerable
hydraulic pressure in the strainer housing. Escaping
solution can thoroughly saturate equipment and
personnel. Close isolation valves fully. Relieve pressure
using a boiler valve. Use extreme care to slowly remove
the end cap and release pressure gradually.
4. Inspect the gasket and service cap for abrasions, tears,
excessive dirt, or deterioration. Replace gasket if
necessary.
Figure 36. Chiller strainer
Heat Exchanger Cleaning Procedure
Fouling of the heat exchangers will result in a gradual
decline in performance of the chiller/heater.
1. Isolate each heat exchanger using the isolation valves.
2. Back flush using the city water supply forced to a drain.
3. A brazed-plate heat exchanger is cleaned by back
washing which is forcing a cleansing water/glycol
mixture backwards through it at higher than normal
pressures.
4. Flushing should take place across a maximum 30 Mesh
screen filter/strainer with frequent screen cleaning to
remove the debris from the chiller/heater. Flushing
should continue until the screen is clean. After
detergent and chemical cleaning, flush the piping for a
minimum of one hour with fresh water to remove any
remaining cleaning compounds.
Compressor Tasks
PolyTherm Chiller/Heater has been designed for ease of
maintenance access. When properly positioned within a
machine room or space, Trane compressors can be quickly
60
5. Remove the strainer from the housing.
6. Clean the strainer inside and out using a soft natural
bristle brush and tap water.
7. Clean the interior of the end cap (or service cap), and
the gasket using a soft natural bristle brush and tap
water. Apply a light coating of lubrication to the gasket.
8. Re-install the strainer in the housing (large end first).
Replace the gasket and end cap and tighten coupling
collar securely.
9. Ensure the water/glycol make-up system is operational
to replenish the water/glycol mixture lost during the
cleaning process.
10. Energize power to the module containing the strainer
by turning power ON at the breaker and/or disconnect.
removed for repair or replacement. (See
and Clearances," p.
11.)
Remove Tandem Compressors
Verify that power is disconnected from the chiller/heater.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is present
with a voltmeter.
There are two different methods for removing the tandem
compressors, depending on the space in which the chiller/
heater is installed and the available space overhead or
behind the module:
Remove Through the Roof Panel: Where there is a
minimum of 48 inches of overhead clearance, remove the
"Site Preparation
ARTC-SVX005A-EN
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