Flue & Flue Baffle; Heat Deflector; Flame Appearance - Norcold N109X Series Service Manual

flue
The flue comes equipped with a removable baffle and a
metal heat deflector cap. The flue on the N109X model
ends a few inches above the canister. See Figure 19.
The flue, along with the baffle, should be checked
annually. In roof exhaust venting applications, the
refrigerator must be removed from the enclosure to
check or service the flue or any of its components.
In most sidewall exhaust venting applications, removal
of the sidewall exhaust vent provides clear access to
service the flue or any of its components.
A one inch diameter, loop-handle, twisted wire brush
with a 27 inch wire handle is recommended for
sweeping clean the flue.
Heat Deflector Cap
The heat deflector cap, see Figure 19, deflects hot
exhaust gases to the sides and keeps dirt and debris
from falling into the flue. Cooling performance may be
affected if the heat deflector blocks the flue opening.
Flue Baffle
The flue baffle, see Figure 20, traps and transfers heat
to the cooling unit generator.
A retaining wire suspends the flue baffle abou three
inches above the flame. See Figure 20. The flue baffle
should be checked annually. In roof vented installations
it is necessary to remove the refrigerator from the
enclosure to check the flue baffle. To remove the flue
baffle from the flue:
1. Remove the heat deflector cap.
2. Unclip the baffle retaining wire from the rim of the
flue.
3. Pull the baffle out of the flue tube.
Do not cut or modify the flue baffle retaining wire!
The wire positions the baffle for optimal heat transfer.

flame appearance

The flame should be light blue with sharp blue root
cones and a steady burning flame plume. See Figure
21.
A flame that is mostly orange or yellow, is erratic, and/
or unstable, indicates a "dirty" burner. Burner cleaning
procedures appear on page 25.
Refrigerator Service Manual
CAUTION
figure 19. flue and components.
Retaining wire
Baffle
Figure 20. Flue baffle.
Light blue steady flame
with sharp blue cones
figure 21. flame appearance.

Heat deflector

Flue
Baffle retaining
wire
Baffle
Burner box
25
N109X Models