Indoor Pool Conditioner
Indoor Pool Conditioner operates
by dehumidifying the pool room area and returning the latent heat back to
the pool water. Properly sized units will provide enough excess heat to
condition the air in the pool room. An integral plenum heater attachment
will also bring the pool up to temperature without an auxiliary source of
heat. System Operation
The Boreal ® PC unit performs three functions in an enclosed pool area.
- Dehumidify pool area
- Heat the pool water
- Heat the pool air
The PC unit can be activated in one or both of the following manners:
- by a signal from the de-humidistat whenever the humidity in the room is above the setpoint.
- by the aquastat whenever the pool water temperature falls below stage-1 setpoint.
When the de-humidistat or aquastat calls for operation, the PC activates in what is essentially a water cooled air conditioner mode. Heat and moisture are extracted from the air and rejected to the pool water. This operation warms the pool water but cools the air as part of the process, therefore heat must be added to the air or the room will cool down. When the pool room temperature falls below the stage1 setpoint of the thermostat it puts the PC unit into air reheat mode until the air temp rises above the thermostat stage1 setpoint. Dehumidification will continue to take place and the unit will alternate back and forth between air heating and water heating with the air having priority and the pool water as the recipient of additional heat that the room does not require.
A typical initial air temperature setpoint for stage1 might be 82°F with a 1°F differential. Of course the air temperature setting can be at whatever your desired requirement however it is recommended you keep stage1 and stage2 setpoints no more than 3° apart with a 1° differential on stage2 and no more than 2° differential on stage1.
Stage2 of the thermostat might be set at 80°F with a 1°F differential. (Reference the programming procedure provided in the Ranco® documentation for exact instructions on how to set the thermostats).
- With these settings, stage1 would activate when the room temperature falls to 81°, stage2 would activate if the room falls to 79°. If there is a heat loss in the room (greater than 20,000 Btu) then the PC unit will not be able to keep up to the loss in the room. The temperature will eventually fall to 79°F activating the stage2 of the thermostat which brings on the 15 Kw electric plenum heater. NOTE: The electric heater can only activate when stage2 of the thermostat calls for heat. This electric plenum heater will prevent any further decline in temperature since it’s output is 50,000 Btu’s. As long as air-reheating via the PC unit (stage1) can maintain the air temperature the plenum heater will be off.
