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IOM-S-Leak Defense 2211 2022-03-15 © 2022 Sentinel Hydrosolutions, LLC
API INSTALLATIONS
Recirculation Pump Switch to API
This wiring application is typical when a customer desires
their hot-water recirculation pump to shut off during a leak,
so the pump doesn’t continue to push water making the
leak worse, or alternatively to save the pump from burn
out due to pumping with no water in the system.
On the API, place the provided jumper wire between +REF
and the NO terminal of one of the relays on the API.
Connect the red wire from the recirculation pump switch
to COM of the same API relay. Finally, connect the black
wire from the recirculation pump switch to -REF or GND
on the API.
Note 1: This applies a 12-volt signal to the switch
inside the recirculation pump switch, to open a
normally-closed switch, shutting off power to the
recirculation pump.
SEE FIGURE 5 DIAGRAM
PAGE 23
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