Navien NCB-24LSWE, Service Manual

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10 NCB Service Manual Version 1.0
CAUTION

Do not attempt to repair or
replace any part of the boiler
unless it is specifically
recommended in this manual.
For repairs not covered in this
manual, contact a qualified
technician or a licensed
professional. Incorrect
adjustments, modifications,
servicing, or maintenance may
cause property damage, personal
injury, or death and will void the
warranty.

Do not allow children to operate
or access the boiler.
Doing so may result in property
damage or personal injury.

Do not change the water
temperature while the boiler is
being used.
Doing so may result in personal
injury.

DO NOT turn on the boiler unless
the water and gas supplies are
connected and supplied Doing
so may damage the boiler.

DO NOT use hot water inside the
installation when the main water
supply shut-off valve is closed.
Doing so may damage the boiler.

DO NOT use the boiler for
purposes other than those
described in this manual.

DO NOT remove the front cover
unless the power to the boiler is
turned off or disconnected.
Failure to do so may result in
electric shock.

When servicing the control
circuits, label all wires prior to
disconnecting them.
Failure to do so may result in
wiring errors and lead to improper
or dangerous operation.

Do not use unauthorised
replacement parts or
accessories.
Doing so may result in improper or
dangerous operation and will void
the manufacturer’s warranty.

Do not place anything in or
around the flue terminals, such
as a clothes line, that can
obstruct the air flow in or out of
the boiler.

If the boiler overheats or the gas
supply fails to shut off, isolate
the gas at the boiler’s main
valve.

Do not use this appliance if any
part has been covered by water.
Contact a qualified service
technician to inspect the appliance
to verify the boiler is safe to
operate and to replace any
damaged parts.