ClimateMaster DC Series Installation Manual download pdf (Page 44)

Residential H&V - 60Hz R22 &R410A

Rev.: 22 Dec, 2008

Water-Source Heating and Cooling Systems

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 ﬂ 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 ﬂ ow. Minimum ﬂ 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 ﬂ owing

through the unit, the less chance for scaling. However, ﬂ 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.

Hot Water Generator Coils

See water coil maintenance for ground water units. If the

potable water is hard or not chemically softened, the high

temperatures of the desuperheater will tend to scale even

quicker than the water coil and may need more frequent

inspections. In areas with extremely hard water, a HWG is

not recommended.

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 ﬁ lter.

Washable, high efﬁ ciency, electrostatic ﬁ lters, when dirty,

can exhibit a very high pressure drop for the fan motor and

reduce air ﬂ ow, resulting in poor performance. It is especially

important to provide consistent washing of these ﬁ lters (in

the opposite direction of the normal air ﬂ 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 insure indoor

air quality. The condensate drain can pick up lint and dirt,

especially with dirty ﬁ lters. Inspect the drain twice a year to

avoid the possibility of plugging and eventual overﬂ ow.

Compressor

Conduct annual amperage checks to insure 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 insure 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 ﬁ ns 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 ﬂ oor

a few inches [7 - 8 cm] to prevent water from entering the

cabinet. 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 charts for pressures and temperatures. Verify

that air and water ﬂ ow rates are at proper levels before

servicing the refrigerant circuit.

Section 10 - Packaged IOM 44 4/24/09 3:16:55 PM

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ClimateMaster DC Series Installation Manual Page 44

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