CONTROLLER TO OFF-PEAK METER WIRING The controller requires an input signal from the utility/coop that lets the controller know when off-peak electricity is available. This is accomplished through a dry contact provided by the utility/coop. A dry contact is a circuit that does not impose any current or voltage on the switched circuit. Typically a dry contact is just a pair of contacts on a relay with no current or voltage source connected. For example:
THE CONNECTION WITH THE UTILITY MUST BE A DRY CONTACT (NOT A VOLTAGE OR CURRENT SOURCE) OTHERWISE DAMAGE TO THE CONTROLLER MAY RESULT.
1.) Locate the pair of BLUE/BLUE-WHITE wires connected together at the factory with a wire nut.
2.) Remove the wire nut and connect the pair of conductors to either side of the contact provided by the utility. 3.) The controller will now turn on the elements only if the utility sends a signal that off-peak is available and the tank is below the setpoint temperature. 4.) If you ever want to override the utility’s signal control, reinstall the wire nut on the BLUE/BLUE- WHITE wire pair. Doing so essentially indicates to the controller that off-peak is always available.
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GARN® WHS Electric Heating Package Manual ©DECTRA CORPORATION - May 2016 (Supersedes September 2015 edition)
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