Navien LCB700-21RS, Installation & Operation Manual

Page: 40 / 96

40 Connecting the Power Supply
WARNING
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Improperly connecting the power supply can result in
electrical shock and electrocution. Follow all applicable
electrical codes of the local authority having jurisdiction.
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When connecting the boiler to the power supply, do
not touch the power cord or internal components of the
boiler with wet hands. Doing so may result in electric
shock.
Connecting the power supply should be performed only by a
licensed professional.
When connecting the power supply, follow these guidelines:
Ɣ
Do not connect the electric supply until all piping is complete
and the boiler has been filled with water.
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Do not connect the boiler to a 110-120 V AC power supply.
Doing so will damage the boiler and void the warranty.
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All the Navien LCB boilers are supplied with a factory-
installed, 3 core wire (Live, Neutral, Earth). The boiler’s current
rating is 3 A and can be plugged into any grounded electrical
outlet adjacent to the boiler. A dedicated power supply is not
required.
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The boiler must be electrically grounded. If wiring the boiler
directly to a power supply, do not attach the ground wire
to oil or water pipes as plastic pipe or dielectric unions may
prevent proper grounding.
Ɣ
We recommend using a surge protector to protect the boiler
from power surges.
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If there is a power failure in cold weather areas, the freeze
prevention system in the boiler will not operate and may
result in the heat exchanger freezing. In cold areas where
power failures are common, you must completely drain the
boiler to prevent damage if power cuts last for extended
periods. Damage caused by freezing is not covered under
warranty.
WARNING
When connecting cables to the boiler through the rubber
stopper on the back of the boiler, cut a hole (or an X) into
the rubber stopper to ensure the cables can pass through
the rubber stoppers. Removing the rubber stoppers and
connecting cables to the boiler may damage the cables, due
to the boiler housing’s sharp edges, and result in electric
shock.
CAUTION
Label all wires before disconnecting them when you work
on the controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after servicing.
8. Connecting the Power Supply