Compu-aire CELAC, Инструкция по установке, эксплуатации, обслуживанию и каталог запасных частей

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SEQUENCE OF OPERATION
R-Y at pulling conpressor contactor, starting the compressor and outdoor
The (indoor mtor) is conpleted on any call for cooling operation or can be
energized by fan on subbase for constant circulation.
solenoid coil on valve controls heating cycle operation. Two options.
one allowing "Auto" changeover fron cycle to cycle and the other constantly during
heating season and thus elininating pressure equalization except during defrost, are to be used. On
"Auto" option. a circuit is conpleted and
R-Y
on each heating "on" cycle,
valve solenoid and pulling in compressor contactor and outdoor also
starting blower Heat heating cycle now in operation. The second option has no "Auto"
changeover position. but instead energizes the revering valve solenoid constantly whenever the systen
on subbase is placed in "Heat" position. the
being constantly fron
R.
A
demand for heat
R-Y
circuit, pulling in starting and outdoor
mtor. also starting indoor blower
PRESSURE SERVICE PORTS
and low pressure service ports are installed on all units so that the systen pressures can be
observed. Pressure curves can be found later in the nanual covering all on both cooling and
cycles. It is imperative to the correct pressure curve to the unit by number.
DEFROST CYCLE
The defrost cycle is controlled by and on the solid state heat control,
the outdoor tenperature is in the lower range or colder, the outdoor tenperature
is or
This
coil is sensed by the coil sensor near the of the
coil. Once coil reaches or below. the coil sends a signal to the control logic of
the heat control and the defrost will start.
After 60 or at belov, the heat punp control will place the system in the defrost
node.
During the node, the refrigerant cycle switches back to the cooling cycle, the outdoor mtor
stops,
electric heaters are energized, and hot gas passing through the outdoor coil ts any accunulator frost.
the rises to approxinately the coil sensor will send a signal to the heat punp
control which will return the to heating operations
If abnormal or condition such as a high wind causes the heat to have a prolonged defrost
cycle, the heat punp control will restore the to heating operation automatically after 10 minutes.