Rinnai ThermaCirc360 RUR199i Installation And Operation Manual page 45

Condensate Drain Pipe Connection
To connect the condensate drain pipe:
1. Apply thread sealant to 1/2 in. MNPT condensate drain port.
2. Thread 1/2 in. NPT fitting onto condensate drain port.
3. Follow the steps in the next section: "Condensate Pump Safety Switch
Wiring."
Condensate Pump Safety Switch Wiring
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 water heater in the event the condensate
pump fails.
1. Disconnect power from the water heater.
2. Open the water heater cover and locate 2 white wires
labeled "To Condensate Pump Safety Switch."
3. Cut crimp connectors off white wires and strip the
insulation off of the two ends.
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).
To Condensate Pump
Safety Switch
Cut off
crimp connectors
Tankless Water Heater
Rinnai Tankless Water Heater Installation and Operation Manual
Strip insulation
off both ends
of wire
Condensate Pump Safety Switch Installation
To Condensate Pump
Safety Switch Wires
Installer-Supplied Wires
Safety Switch Wires
Condensate Pump (installer-supplied)
Includes internal safety switch and power cord.
Power cord must be plugged into power source.
5. With wire nuts or other approved wire connectors,
connect the "To Condensate Pump Safety Switch"
wires to the normally open contacts on the
condensate pump (see image below).
6. Reconnect power to the water heater 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.
2. Turn on the water heater.
3. The water heater displays diagnostic code "25."
4. Plug in the condensate pump in and confirm
condensate is flowing out of the reservoir.
5. Turn off the water heater by pressing the "On/Off"
button on the controller. Wait 5 seconds then turn
the power back on. This will clear the diagnostic
code.
Wire Nut Connecting
Two Wires
1/2 in. MNPT
Condensate Drain
Safety switch wires connect
to the NO and COM contacts
on the safety switch.
COM
NC
NO
•
NO - Normally Open
•
NC - Normally Closed
•
COM - Common (Neutral)
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