Rinnai Tankless Water Heater Installation and Operation Manual
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4.11 Connect the Power Supply
•
Do not use an extension cord or adapter plug with this appliance.
•
The water heater must be electrically grounded in accordance with local codes and ordinances or,
in the absence of local codes, in accordance with the National Electrical Code, ANSI/NFPA No.
70.
•
Indoor water heaters are equipped with a three-prong (grounding) plug for your protection against
shock hazard and should be plugged directly into a properly grounded three-prong receptacle. Do
not cut or remove the grounding terminal from this plug.
4.11.1 Guidelines
When connecting the power supply, follow these guidelines:
•
Do not rely on the gas or water piping to ground the water heater. Ground locations are provided
inside the water heater.
•
The water heater requires 120 VAC, 60 Hz power from a properly grounded circuit.
•
If using the 5 ft (1.5 m) power cord (supplied with internal/indoor water heaters), plug it into a
standard 3 prong 120 VAC, 60 Hz properly grounded wall outlet.
•
On external (outdoor) models, a disconnect switch must be provided and installed for the in
-
coming 120 VAC power. The switch should be a type that is suitable for outdoor use. Check the
National Electrical Code, ANSI/NFPA 70 and your local codes for a proper switch type to use in
your area. Power connections must be protected from the weather and flexible cords must use an
appropriate strain relief.
•
The wiring diagram is located on the inside of the water heater front cover.
WARNING
120V Wiring
•
White wire (Neutral)
•
Black wire (Hot leg)
□
Confirm that the electricity is supplied from 120 VAC, 60 Hz power source and is in a properly
grounded circuit.
□
Confirm that an extension cord or an adapter plug has NOT been used with the water heater.
Post-Power Supply Connection Checklist
Ground connection
screw
Disconnect switch (required on external outdoor models)
Figure 65
