State GTS-110-NI - Manual (Page 21)

Installation
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Follow the electrical code requirements of the local authority having
jurisdiction. In the absence of such requirements, follow the latest edition of
the National Electrical Code ANSI/NFPA 70 in the U.S. or the latest edition of
CSA C22.1 Canadian Electrical Code, Part 1, in Canada.
When servicing or replacing parts within the water heater, label all wires
prior to disconnection to facilitate an easy and error‐free reconnection.
Wiring errors can cause improper and dangerous operation. Verify proper
operation after servicing.
ELECTRICAL CONNECTIONS
All indoor models come with a power plug instead of a junction box. As a result, the following
procedure is unnecessary for indoor models.
1.
The water heater must be electrically grounded. Do not attach the ground wire to either the gas or
the water piping.
2. The water heater requires 120 VAC / 60 Hz electrical power supply that is properly grounded.
 A proper disconnect (i.e. on/off switch, power plug, etc.) controlling the main power to the
water heater must be provided for service reasons. (Must comply with local codes).
 Connect the power supply to the water heater exactly as shown in the wiring diagram;
3. A green screw is provided in the junction box to ground the connection.
4. Can be hardwired or wired to a plug‐in.
5. The use of a surge protector is recommended in order to protect the unit from power surges.
CAUTION
WARNING
View of electrical connections of water heater
Connect
Power supply
120 VAC / 60 Hz
Ground
Green screw
Outdoor models only
Bottom view
of water heater
Indoor models only