PoolPak PCP Series – Indoor OMM 24 September 2020
• Compressor (13), Receiver (14) and other components are located within the Compressor Compartment (3).
o If the dehumidifier has the standard pool water heating option, the compressor circuit additionally
includes the coaxial pool water heat exchanger (15) and refrigeration pool water heating valve.
o If the dehumidifier has the water-cooled air conditioning option (equipped with fluid cooler or
connected to external water-cooling source), the compressor circuit also includes the plate heat
exchanger (16). Some models may have refrigeration suction accumulator (13a).
• Main Electric Panel contains Main Control Board (17), Operator Panel (18) and other electrical components.
Control System
The dehumidifier control system is composed of sensors, spread throughout the dehumidifier, Main Control
Board, Operator Panel and other electric components, located in the Main Electric Panel.
Temperature Sensors (Pic. D.2):
a) Temperature sensors (thermistors) are used to monitor
various temperatures (air, water, compressor, etc.);
b) Combo sensor is used to monitor air temperature and
humidity.
Compressor operation is monitored with pressure sensors (Pic. D.3):
c) Pressure Transducers (as main operational control and safety) and
d) Pressure Switches (fast-reacting backup safety).
Sensors and safeties approximate location is shown on Pic. D.4-S, D.4-R, D.4-B (see below).
• RA Combo Sensor (21) measures temperature and humidity of the pool room air (Return Air) entering the
dehumidifier. It is located at the return air ductwork connection to thedehumidifier.
• OA Temperature Sensor (22) measures outdoor air temperature; it’s located at the OA filter rack.
o As an option, the combo sensor (instead of regular thermistor) can be installed at the OA intake to
measure both the temperature and humidity of the outdoor air.
• ET (EvapT) Temperature Sensor (23) measures the temperature of air leaving evaporator coil. It’s located
directly downstream of the evaporator.
• SA temperature sensor (24) measures the temperature of the air leaving the dehumidifier (supplied to the
premise). It must be located downstream of the space heater:
o In some cases, where the space heater is external to dehumidifier, the sensor will be provided with
the dehumidifier to be field-mounted into the supply air ductwork downstream of the space heater.
• If the dehumidifier is equipped with the pool heating option, the Pool Water Temperature sensors (Pool In
(25) and Pool Out (26)) measure the entering and leaving pool water temperature. The sensors are located
directly at the respective connections of the coaxial pool water heat exchanger.
o As an option, the pool water heat exchanger piping/manifold may have water flow switch also.
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