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W415-0616 / B / 02.18.08
27
The products of combustion will contain small particles of fl y ash.
The fl y ash will collect in the exhaust venting system and restrict
the fl ow of the fl ue gases. Incomplete combustion occurs during
startup, shutdown, or incorrect operation of the room heater will
lead to some soot formation which will collect in the exhaust vent-
ing system. The exhaust venting system should be inspected at
least once every year to determine if cleaning is necessary.
NOTE: More frequent cleaning may be required depending on pellet quality.
WARNING: Disconnect the power cord prior to conducting service. The following section details extensive maintenance procedures.
We strongly suggest these items be carried out by a trained service technician, possibly by a service agreement set up with your dealer.
NOTE: The heater becomes very hot during operation. Let the heater cool completely and disconnect the power cord prior to conducting
service.
SEMI-ANNUALLY (OR EVERY TWO TONS OF PELLET)
SOOT AND FLY ASH FORMATION
CLEAN THE VERTICAL EXHAUST DUCT
Insert a vacuum into the exhaust port holes and remove as much
fl y ash as possible from behind the left and right exhaust mani-
folds. Once clean, replace the exhaust port doors and secure with
the screws.
Figure 31
CLEAN EXHAUST HOUSING (INSERT ONLY)
To clean the exhaust blower and exhaust housing, the heater must
be pulled out from the fi replace cavity. Remove the venting from
the exhaust collar. If installed as a top vent, remove cover plate
from the rear of the housing. If installed as a rear vent, remove the
cover plate from the top of the housing. Vacuum out the housing
back to blower outlet. See Figure 46.
Figure 44
NPS40:
Run the heater until the
pellets run out, then open
the hopper and vacuum
out the entire hopper. The
dust and any other debris
near the bottom should be
removed to prevent exces-
sive build-up.
VACUUM HOPPER
Figure 43
Cleaning the Optional
Plated Surfaces
Fingerprints or other marks left on plated surfaces may become
etched in place if they are not wiped clean prior to turning the
heater on. Wipe the gold with a non-abrasive cleaning solvent and
a soft cloth (make sure the heater is cool). Other cleaners may
leave a fi lm that may become etched into the fi nish.
If the PRPP40 or the brick kit NP841KT is in place, remove that
accessory fi rst.
1. Open side door, release the latch and pivot the viewing door
wide open. See Figure 35 and 36.
2. Remove the one screw on each exhaust port located
on either
side of the fi re box. Remove the exhaust port doors and set
aside on a non-combustible surface.