EP-2 Pump Specifications and Installation Instructions
c. Black: This goes to the 24vac COMMON terminal of the HVAC unit transformer, NOT the transformer powering the zoning equipment. This terminal is usually NOT present on the zone control board under “equipment” since it is not needed. If your old thermostat has a “C” for common, that is the 24vac common terminal you are looking for. If replacing an older pump, connect the black wire to the same location as the original black wire.
d. NOTE: Very old pumps may be 110vac and your new EP-1 or EP-2 pump is NOT wired like the original pump.
OPERATION: A relay is energized to start the pump on either call for fan or heat. The pump will not run if the equipment is not running.
3. After installation, wrap relay and connections with electrical tape to avoid shorting.
5. Mounting the pump: Use 2 long deck type screws to suspend the EP-2 pump far enough away from the wall, if possible, so that the pump and sling do not touch the wall. This will keep potential noise from wall contact from occurring.
Green wire: connect to HVAC fan equipment circuit “G"
Connect to 24vac transformer serving zone control panel
CONSULT A QUALIFIED HVAC TECHNICIAN OR ELECTRICIAN AS NEEDED.
Dangerous high voltage, high amperage power is present in most HVAC units and extreme caution must be taken.