Condensate Pump Safety Switch Wiring - Rinnai I Series Installation And Operation Manual

To connect the condensate drain pipe:
1. Apply thread sealant to 1/2 in. NPT
condensate drain port.
2. By hand, thread 1/2 in. NPT fitting onto
condensate drain port.
3. Follow the steps in the next section: "8.9

Condensate Pump Safety Switch Wiring."

IMPORTANT
DO NOT use a wrench to tighten the
condensate drain pipe connection as this
could cause the connection to break.
Condensate Drain
IMPORTANT
The steps in this section must conform with
local codes and the guidelines established by
the National Electrical Code (NEC).
The condensate pump (if installed) should be
wired to deactivate the boiler in the event the
condensate pump fails.
1. Disconnect power from the boiler.
2. Open the boiler cover and locate two white
wires labeled "To Condensate Pump" (the
wires may be located behind the PC Board).
3. Cut crimp connectors off white wires and
strip the insulation off of the two ends.
Rinnai I-Series Condensing Boiler Combi Manual
4. Select an appropriate length of wire (18
AWG or greater) and strip the insulation
off the ends. Follow the wiring guidelines
established by the National Electrical Code
(NEC).
5. With wire nuts or other approved wire
connectors, connect the "To Condensate
Pump" wires to the normally open
contacts on the condensate pump (see
image below).
6. Reconnect power to the boiler and press
the On/Off button on the controller.
Test Operation
1. Test the operation of the shut off switch
by unplugging the condensate pump and
filling the condensate reservoir with
water until the float switch closes the
circuit.
1/2 in.
2. Turn on the boiler.
NPT
3. The boiler displays diagnostic code "250."
4. Plug in the condensate pump and confirm
condensate is flowing out of the
reservoir.
5. Turn off the boiler by pressing the On/Off
button on the controller. Wait five
seconds, then turn the power back on.
This will clear the diagnostic code.
To Condensate Pump
Cut off
crimp connectors
See visual illustration on next page.
Strip insulation
off both ends
of wire
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