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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.
•
Do not exceed the limits of the 15A
circuit.
•
The water heater requires 120 VAC,
60 Hz power from a properly grounded
circuit.
•
Do not connect power to the Demand
Duo
H-Series system prior to
completing installation and filling the
system with water.
•
The Tankless Water Heater wiring
diagram is located on the inside of the
water heater front cover. The controller
wiring diagram is located on the inside
front cover of the controller.
•
When power is supplied, the water heater
maintains pump operation. If the Demand
Duo
H-Series system is not in use for
an extended period of time, disconnect
power from the system.
WARNING
•
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.
Demand Duo
H-Series with SENSEI CX Installation Instructions
To connect the power supply:
1. An electrical assembly is pre-installed on
the storage tank for single point electrical
connection (Refer to the Specifications
sections in this manual for electrical
requirements.
Connect power to the electrical assembly
by following the steps on the following
page.
Figure 52
WARNING
Shut off building supply power prior to
connecting to the electrical assembly.
Failure to do so may result in property
damage, bodily harm, or death.
Electrical
Assembly with 20
A, 125 V, 2-Pole,
3-Wire Grounding
Receptacle
45
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