Preventive Maintenance - Heat Controller HKV Installation, Operation & Mainenance Manual

Heat Controller, Inc.
Water Coil Maintenance –
Generally water coil maintenance is not needed however,
if the installation is located in a system with a known
high dirt or debris content, it is best to establish with
the owner a periodic maintenance schedule so the coil
can be checked regularly. These dirty installations are
a result of the deterioration of iron or galvanized piping
or components in the system or open cooling towers
requiring heavy chemical treatment and mineral buildup
through water use. 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 flowing
through the unit, the less chance for scaling, however
flow rates over 3 gpm per ton 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.
They should be inspected every month under normal
operating conditions and be replaced when necessary.
Units should never be operated without a filter.
Washable high efficiency electrostatic filters, when dirty,
can exhibit a very high pressure drop for the fan motor
and reduce air flow resulting in poor performance. It is
especially important to provide consistent washing of
these filters (in opposite direction of the normal air flow)
once per month using a high pressure wash similar to
that found at self-serve car washes.
Condensate Drain
In areas where airborne bacteria produce a slime in
the drain pan, it may be necessary to treat chemically
with an algaecide every three months or so to minimize
the problem. The condensate pan may also need to be
cleaned periodically to assure indoor air quality. The
condensate drain can pick up lint and dirt, especially with
dirty filters. Inspect the drain twice a year to avoid the
possibility of overflow.
HKV LArge CommerCiAL
Compressor
Conduct annual amperage checks to ensure amp draw
is no more than 10% greater than that indicated by serial
plate data.
Fan Motors
All units have lubricated fan motors. Inspection should be
performed for proper tension and excessive wear of drive
belts every three months.
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 fins while cleaning.
CAUTION: Fin edges are sharp.
Cabinet
Do not allow water to stay in contact with the cabinet for
long periods of time to prevent corrosion of the cabinet
sheet metal. Generally vertical cabinets are set up from
the floor a few inches for prevention. The cabinet can be
cleaned using a mild detergent.
Refrigerant System
To maintain sealed circuit integrity, do not install service
gauges unless unit operation appears abnormal.
Reference the operating chart for pressure and
temperatures. Verify that air and water flow rates and
temperatures are at proper levels before servicing the
refrigerant circuit.
To avoid the release of refrigerant into the atmosphere,
the refrigerant circuit of this unit must be serviced only by
technicians who meet local, state, and federal proficiency
requirements.
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IOM Instructions

Preventive Maintenance

WARNING!