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III.
Short Cycling
When a heat pump is in operation, its compressor circulates
refrigerant under high pressure. Once off, it will take two to
three minutes for this high pressure to equalize.
The heat pump compressor is unable to start against high
pressure. Therefore, once the heat pump is turned off, it is
important to leave it off for two to three minutes before
restarting.
Short cycling the compressor (or starting it before pressures
have equalized), will in some instances, kick the circuit
breaker or overload.
IV.
For Heating Operation (Refer to Figure 1, page 3).
The heat pump will operate on reverse cycle refrigerant
heating at outdoor temperatures above freezing. When the
outdoor temperature is below freezing, the heat pump
compressor will shut down to prevent outdoor coil freeze-up.
At this time, if the optional auxiliary electric resistance heater
has been installed, it will be energized to take the chill out of
the indoor air. The electric resistance heater is not a substitute
for a furnace at these low outdoor temperatures.
A.
Turn the selector switch to the "HIGH HEAT"
position. At "HIGH HEAT", the fan operates on
high speed with heat output at maximum.
B.
Rotate the thermostat (temperature control) switch
to the position that is the most comfortable to you.
I.
Owner
One of the biggest advantages to your new Coleman-Mach
heat pump is that the maintenance needed to keep the unit in
good care is minimal. In fact about the only thing you, the
owner, must take care of is the cleaning and replacement of
the filters.
Filters are made from long life non-allergenic natural fibers
which can be cleaned and reused, and which completely filter
the circulated air when the air conditioner is in operation. If
the filters are not cleaned at regular intervals, they may
become partially clogged with lint, dirt, grease, etc. A
clogged filter will produce a loss of air volume and may
eventually cause an icing-up of the cooling (evaporator) coil.
NOTE
IV. MAINTENANCE
The thermostat will turn the compressor/heater on
when the temperature of the air entering the heat
pump unit drops below this setting a few degrees, and
automatically turns off when the temperature of the
air entering the heat pump rises a few degrees above
this setting. The compressor/heater will continue to
cycle on and off in this fashion until the selector
switch is turned to another mode of operation.
C.
Position the louvers to the desired direction the
discharge air is to flow.
Discharge air temperature can be controlled to some
extent by opening or closing the louvers. When the
louvers are closed, the warmest localized discharge
air is achieved. Fully opened louvers will throw the
warm discharge air to the back and front of the
vehicle for more efficient circulation and faster
warm-up. Although the air temperature is lower with
the louvers fully opened, the heating capacity is still
the same.
V.
For Air Circulation Only (Refer to Figure 1,
page 3).
A.
Turn the selector switch to "LOW FAN" or for
maximum air flow, to "HIGH FAN".
B.
Position the louvers to the desired direction the
discharge air is to flow.
When the selector switch is in the "LOW FAN" or "HIGH
FAN" position, the blower motor will operate continuously.
Do not operate your heat pump for extended periods of
time without the filter installed.
An even more serious condition occurs when the heat
pump is operated without a filter. When this happens the
lint, grease, etc. that are normally stopped by the filter are
now accumulating in the cooling coil. This not only leads
to a loss of air volume and a possible icing-up of the
cooling coil, but could also result in serious damage to the
operating components of the heat pump.
We recommend that the filters be cleaned and changed at
least every two weeks when the heat pump is in operation.
4
NOTE
IMPORTANT
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