26
ELECTRICAL CONNECTIONS – ALL MODELSELECTRICAL CONNECTIONS – ALL MODELS
The water heaters covered in this Service Handbook require a 120 VAC, 1Ø (single phase), 60Hz, 15 amp power supply and must also
be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70 or
the Canadian Electrical Code, CSA C22.1.
POWER FLUCTUATIONS AND ELECTRICAL NOISE
The water heater’s control system requires a source of stable clean electricity for proper operation. Connecting the water heater to a
branch circuit that is subject to uctuations in voltage level or electrical line noise such as EMI (electro magnetic interference) or RFI
(radio frequency interference) may cause erratic control system operation and malfunction.
A high quality power supply lter/suppressor must be installed if the above conditions exist. Call the technical support phone number
listed on the back cover of this Service Handbook for more information.
Note: Malfunctions caused by power supply and costs to install power supply lters are not covered under the limited warranty.
DEDICATED POWER WIRING AND BREAKERS
Dedicated power supply wires, neutral wires, ground wiring, and dedicated circuit breakers often reduce electrical line noise and are
required when installing the water heater.
Note: This water heater should not be connected to an electrical supply with a Ground Fault Circuit Interrupter (GFCI) or Arc Fault
Circuit Interrupter (AFCI) with Integral GFCI protection as dened in NFPA 70, CSA C22.1 and UL 943.
ELECTRICAL WIRING
All electrical work must be installed in accordance with the National Electrical Code, ANSI/NFPA 70 or the Canadian Electrical Code, CSA C22.1
and local requirements.
When installed, the water heater must be electrically grounded in accordance with local codes or, in the absence of local codes, with
the National Electrical Code, ANSI/NFPA 70 or the Canadian Electrical Code, CSA C22.1.
If any of the original wire as supplied on the water heater must be replaced, it must be replaced with UL Listed Power Limited Circuit
Cable of the same size and rating as original wiring.
POWER SUPPLY CONNECTIONS
The 120 VAC black (hot) wire from the power supply must connect to the black lead wire or the “L1” terminal block location in the
junction box and the 120 VAC white (neutral) wire must connect to the white lead wire or the “Neutral” terminal block location in the
junction box for correct polarity. See Figure 19 (page 27).
Power supply connections must be made as follows:
1. Turn off the electrical circuit breaker that serves the water heater.
2. Remove the junction box cover.
3. Connect the 120 VAC black (hot) wire from the power supply to the black lead wire or the terminal block location marked “L1” inside
of the junction box located on top of the water heater. If the black lead wire is used make the connection inside of the junction box
with a properly sized wire nut. See Figure 19 (page 27) on next page and Wiring Diagram (page 39).
Note: If electrical connection is made directly to terminal block remove black lead wire before making connection.
4. Connect the 120 VAC white (neutral) wire from the power supply to the white lead wire or the terminal block location marked
“Neutral” inside of the junction box located on top of the water heater. If the white lead wire is used, make the connection inside of
the junction box with a properly sized wire nut. See Figure 19 (page 27)and Wiring Diagram (page 39).
Note: If electrical connection is made directly to terminal block remove white lead wire before making connection.
5. Connect the ground wire from the power supply to the grounding lug inside the junction box. See Figure 19 (page 27)and Wiring Diagram
(page 39).
6. Replace junction box cover when connections are complete.
Note: Do not apply power to the water heater before installation is complete and the water heater is lled with water.
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