Noritz NRC661-DV, Service Manual, Page: 68 / 78

22
Periodic Maintenance
Wipe the outside surface with a wet cloth, then dry the surface. Use a neutral detergent to clean any stains.
If an external condensate neutralizer is installed, periodic replacement of the neutralizing agent will be required.
Refer to the instructions supplied with the neutralizer for suggested replacement intervals.
• Do not use benzene, oil or fatty detergents to clean the remote controller;
deformation may occur.
• The remote controller is water resistant but not water proof. Keep it as dry as possible.
R
Periodic Inspection
Unit
Optional Remote Controller
Wipe the surface with a wet cloth.
To prevent burns or scalding, turn off the power
button or power supply and wait until the unit
cools before performing maintenance.
CAUTION
Be sure to do.
Check
For laundry, newspaper,
timber, oil, spray cans
and other combustible
materials near the heater
or the exhaust vent
terminal.
For abnormal sounds
during operation.
For abnormalities in
external appearance,
discoloration or flaws.
For water leaks from the
unit and piping.
For dust and soot in
the exhaust vent or
exhaust vent terminal.
For proper operation of
pressure relief valve.
Check
Check
Check
Check
Check
(Ex. NRC711-DV)
For blockage at the
drain pipe discharge.
Check
Check
For smear or blockage
with dust, oil, etc. at the
air supply vent.
If blocked, remove the
build-up with a vacuum
cleaner or damp towel.
[When supplying combustion air
from the indoors]
* Do not permanently remove the Inlet Screen.
Air supply vent
68