Condensate Overflow Protection

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To protect the building from high condensate water levels in the fan coil drain pan, either an auxiliary overflow drain connection should be made available as part of the drain pan design, or a float switch or condensate pump can be factory-supplied for field installation.

Float Switch: Price offers a 24V float switch which installs easily into the drain pan using two set screws. When the water level rises within the drain pan, the normally closed switch opens and should be wired to cut the control signal to the chilled water valve. This will cause the Normally Closed actuator to close. The fan will continue to run to maintain minimum air flow rates. Once the water level in the drain pan drops to an appropriate level, the unit will resume normal operation. Float switches are used when condensate pipes use gravity for drainage.

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