Lennox Hearth T300P - Manual (Page 23)

ROUTINE MAINTENANCE
Page 23
PHOTOEYE
The photoeye is positioned to view the flame from the top
of the auger feed tube. It is located below the auger
cover and can be accessed from inside the hopper for
annual maintenance or replacement (if necessary).
Photoeye Access Inside Hopper
* (Minimum frequency of 6 months to 1 year)
Annual Maintenance Procedure:
Clean Photoeye Lens:
1. To access photoeye, remove cast top by lifting off, then
remove the 3 nuts on the cover plate (see picture
above).
2. Lift off cover plate and turn over (the photoeye is at-
tached to the inside surface of cover). Wipe away
any dust or debris from the photoeye lens (see fol-
lowing picture).
Remove Filter and Wipe Clean
CAUTION: If the filter is not reinstalled, refractive
light in the room may result in a fault, thus shutting
down of the unit.
Clean Filter Lens:
1. With the photoeye cover plate removed, look inside
the opening. You will see an amber colored square
glass filter secured in place by a bracket and 2 nuts
(it is on the left when viewed while facing the front of
the stove). Using a 11/32" nut driver, remove the 2
nuts and lift off the bracket. Using your finger slide fil-
ter up and out.
2. Wipe away any dust or debris from filter, then rein-
stall filter, filter bracket and cover plate with photo-
eye.
IMPORTANT: When reinstalling photoeye and cover,
be careful not to bend bracket or damage wires. Pay
special attention in positioning wires away from pho-
toeye (which could obstruct it from sensing light).
* (Minimum frequency of 4 weeks - 6 months)
EXHAUST PASSAGES AND VENT PIPE
Inspect frequently and clean when necessary. Fly ash
will accumulate at all bends in the exhaust system.
Note: Large amounts of fly ash build-up will create a lack
of combustion air. Removing the Tee cap on vertical in-
stallations will allow an inspection of the ash build-up in
the exhaust Tee and will help you to decide how fre-
quently more extensive cleaning must be performed.
Rain Cap
Clean-Out Tee
Using a 11/32"
nut driver remove
the 3 nuts to ac-
cess photoeye
and filter. Photoeye Cover
Plate.
Clean
Lens
Filter