CLIMATEMASTER WATER-SOURCE HEAT PUMPS
TSM/TSL Vertical Stack
Rev.: January 18, 2021
ClimateMaster Water-Source Heat Pumps
74
Preventive Maintenance
Water Coil Maintenance
(Direct ground water applications only)
If the system is installed in an area with a known high
mineral content (125 P.P.M. or greater) in the water, it is
best to establish a periodic maintenance schedule with
the owner so the coil can be checked regularly. Consult
the well water applications section of this manual for
a more detailed water coil material selection. Should
periodic coil cleaning be necessary, use standard coil
cleaning procedures, which are compatible with the heat
exchanger material and copper water lines. Generally,
the more water owing through the unit, the less chance
for scaling. Therefore, 1.5 gpm per ton [2.0 l/m per kW]
is recommended as a minimum ow. Minimum ow rate
for entering water temperatures below 50°F [10°C] is 2.0
gpm per ton [2.6 l/m per kW].
Water Coil Maintenance
(All other water loop applications)
Generally water coil maintenance is not needed for closed
loop systems. However, if the piping is known to have
high dirt or debris content, it is best to establish a periodic
maintenance schedule with the owner so the water coil
can be checked regularly. Dirty installations are typically
the result of deterioration of iron or galvanized piping or
components in the system. Open cooling towers requiring
heavy chemical treatment and mineral buildup through
water use can also contribute to higher maintenance.
Should periodic coil cleaning be necessary, use standard
coil cleaning procedures, which are compatible with both
the heat exchanger material and copper water lines.
Generally, the more water owing through the unit, the
less chance for scaling. However, ow rates over 3 gpm
per ton (3.9 l/m per kW) can produce water (or debris)
velocities that can erode the heat exchanger wall and
ultimately produce leaks.
Filters - Filters must be clean to obtain maximum
performance. Filters should be inspected every month
under normal operating conditions and be replaced when
necessary. Units should never be operated without a lter.
Washable, high efciency, electrostatic lters, when dirty,
can exhibit a very high pressure drop for the fan motor
and reduce air ow, resulting in poor performance. It is
especially important to provide consistent washing of
these lters (in the opposite direction of the normal air
ow) once per month using a high pressure wash similar
to those found at self-serve car washes.
Condensate Drain - In areas where airborne bacteria
may produce a “slimy” substance in the drain pan, it may
be necessary to treat the drain pan chemically with an
algaecide approximately every three months to minimize
the problem. The condensate pan may also need to be
cleaned periodically to ensure indoor air quality. The
condensate drain can pick up lint and dirt, especially with
dirty lters. Inspect the drain twice a year to avoid the
possibility of plugging and eventual overow.
Compressor - Conduct annual amperage checks to
ensure that amp draw is no more than 10% greater than
indicated on the serial plate data.
Fan Motors - All units have lubricated fan motors. Fan
motors should never be lubricated unless obvious, dry
operation is suspected. Periodic maintenance oiling is
not recommended, as it will result in dirt accumulating in
the excess oil and cause eventual motor failure. Conduct
annual dry operation check and amperage check to
ensure amp draw is no more than 10% greater than
indicated on serial plate data.
Air Coil - The air coil must be cleaned to obtain maximum
performance. Check once a year under normal operating
conditions and, if dirty, brush or vacuum clean. Care must
be taken not to damage the aluminum ns while cleaning.
CAUTION: Fin edges are sharp.
Cabinet - Check inside cabinet once a year. Gently brush
or vacuum clean if needed. Do not tear insulation, repair
with foil tape.
Refrigerant System - To maintain sealed circuit integrity,
do not install service gauges unless unit operation
appears abnormal. Reference the operating charts for
pressures and temperatures. Verify that air and water
ow rates are at proper levels before servicing the
refrigerant circuit.
All product families have transitioned to CoreMax® high
ow service valves. In place of Schrader ports.
The CoreMax® system:
• Permits up to six times higher ow rate to
substantially reduce refrigerant recovery and
evacuation time
• Maintains compatibility with ¼” are standard
refrigeration hose connections
• Has lower leak rates than the traditional refrigerant
valve/access ttings
• Requires a special tool (FasTest - SCFT20A) to
replace the valve core without reclaiming, evacuating
and recharging the system. The tool can be purchased
directly from FasTest or check with your local supply
house.
For additional information, please contact our technical
service department.
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