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Part 7 - Connecting Electrical Service
Install wiring and electrically ground water heater in accordance
with the authority having jurisdiction or, in the absence of such
an authority, follow the National Electrical Code, NFPA 70, and/
or CSA C22.1 Electrical Code-Part 1 in Canada. Failure to follow all
applicable local, state, and national regulations, mandates, and
building supply codes for guidelines to install the electrical power
supply could result in property damage, serious personal injury,
or death.
ELECTRICAL SHOCK HAZARD – To ensure safety, turn off electrical
power supply at service entrance panel before making any
electrical connections to avoid possible electric shock hazard.
Failure to do so could result in property damage, serious personal
injury, or death.
Jumping out control circuits or components WILL VOID product
warranty and can result in property damage, personal injury, or
death.
It is of extreme importance that this unit be properly grounded. It
is very important that the building system ground is inspected by
a qualified electrician prior to making this connection. Electrical
power must only be turned on when the heater is completely
filled with cold water. Failure to follow these instructions could
result in component or product failure, serious injury, or death.
Label all wires prior to disconnecting them when servicing the
heater. Wiring errors can cause improper and dangerous operation.
Failure to follow these instructions may result in property damage
or personal injury.
A. Wiring
•
Do not plug electrical power to the unit until all plumbing
and gas piping is complete and the water heater has been
filled with water.
•
The use of a surge protector is recommended to protect
from power surges.
•
This water heater requires a power supply of 120 VAC/60 Hz.
Do not connect 220-240 VAC to this unit. It will damage the
water heater and void the warranty.
•
A means for switching off the 120 VAC power supply must be
provided (circuit breaker).
•
Do not disconnect the power supply when the unit is in
normal operation.
•
A battery back-up may be used to supply hot water during
periods of power outages. It is recommended to install a
computer grade UPS (uninterruptable power supply; true
sine wave) with at least 600 VA rating for extended coverage.
1.
This water heater must be properly grounded. Ensure the
electrical receptacle that the water heater will be plugged into
is properly grounded.
2.
Do not attach the ground wire to either the gas or water piping.
3.
The wiring diagrams in this manual are to be used for reference
purposes only.
4.
Refer to these diagrams and the wiring diagrams of any external
controls used with the installation when wiring the water
heater. Read, understand, and follow all wiring instructions
supplied with the controls.
5.
Do not disconnect the power supply when the water heater is
in normal operation.
NOTE: For additional electrical protection, the use of a whole house
surge protector is recommended. Damage caused by power surges
is not covered by the warranty.
All units come with a factory installed 3-pronged power (grounded)
plug. It is required to run a dedicated electrical line to the water
heater to prevent electrical interference.
Figure 31 - Proper Grounding - Internal Manual Power Switch
If the water heater display does not turn on, first check the plug.
Then check the electrical panel circuit breaker and reset if necessary.
If the circuit breaker trips again, do not reset. Disconnect the plug
and have a qualified technician diagnose the problem.
B. Dip Switches
There are two DIP switches.
Figure 32 - DIP Switch Details
DIP Switch Group 1
ON
Switch 1
Switch 2
NOTE: Switches 1 - 4 are set as OFF at the Factory. These
switches must remain OFF and not be changed.
Switch 3
Switch 4
DIP Switch Group 2
ON
High Elevation Operation
Switch 1
On
(Above 4500 Feet)
Table 17 - DIP Switch Groups - NOTE: The Default setting for all DIP
Switches is OFF.
whl-605 Rev. 002 Rel. 000 Date 1.23.19
35
OFF (Default Position)
OFF (Default Position)
Normal Elevation
Operation On
(Below 4500 Feet)
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