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Heatilator • CD4236IR-C, CD4842IR-C • 2207-900 Rev. J • 11/1116
C. Logs/Grate and Valve Assembly Removal
It may become necessary to remove the logs/grate and
valve assembly. This task should be performed by a quali-
fi ed service technician. The base pan does not need to
be removed to service the burner assembly.
1. Remove the two top logs from the log/grate assembly.
These logs are not secured to the assembly with screws.
See Figure 3.2.
Figure 3.2 Remove Top Two Logs
2. Remove screw from each tab at the front of the log/grate
assembly that secures the assembly to the base pan.
See Figure 3.3
Figure 3.3 Remove Screws from Front Tab
Figure 3.4 Remove Screws from Log Tabs
3. Remove screws from log tabs on both ends of the rear
log and remove the log. See Figure 3.4.
Figure 3.6 Top Screws For Metal Refractory
Figure 3.5 Bottom Screws For Metal Refractory
Figure 3.7 CD4842IR-C Extra Metal Refractory Screws
2 EXTRA
2 EXTRA
SCREWS TO BE
SCREWS TO BE
REMOVED FOR
REMOVED FOR
CD4842IR-C
CD4842IR-C
4. The standard metal refractory will have to be removed
in order to access the valve assembly. This is done by
removing 8 screws (10 screws for CD4842IR-C model).
There are 4 screws per side panel, Figure 3.5 shows
the 2 screws on the bottom of panels and Figure 3.6
shows the 2 screws on the top of the panels. The 2
other screws for CD4842IR-C models are located in
back wall of fi rebox as shown in Figure 3.7. One is up
by exhaust baffl e and the other is behind logs and near
fi replace bottom.