Page 31
10− Back wash using steam. Begin from the burner opening
on each clam. Steam must not exceed 275°F.
11− To clean burners, run a vacuum cleaner with a soft brush
attachment over the face of burners. Visually inspect in-
side the burners and crossovers for any blockage
caused by foreign matter. Remove any blockage. Figure
27 shows burner detail.
12− To clean the combustion air inducer visually inspect and
using a wire brush clean where necessary. Use com-
pressed air to clean off debris and any rust.
13− Reinstall heat exchanger in vestibule. (Replace the
five screws in the cabinet from step 10 if removed).
14− Reinstall collector box, combustion air assembly, inter-
nal flue pipe and flue chase.
Seal with high tempera-
ture RTV
. Reinstall all screws to the collector box and
combustion air inducer. Failure to replace all screws
may cause leaks. Inspect gaskets for any damage and
replace if necessary.
15− Reinstall burner box, manifold assembly and burner box
cover.
16− Reconnect all wires.
17− Reconnect top cap and vent pipe to combustion air in-
ducer outlet.
18− Reconnect gas supply piping.
19− Turn on power and gas supply to unit.
20− Set thermostat and check for proper operation.
20− Check all piping connections, factory and field, for gas
leaks. Use a leak detecting solution or other preferred
means.
CAUTION
Some soaps used for leak detection are corrosive to
certain metals. Carefully rinse piping thoroughly af-
ter leak test has been completed. Do not use
matches, candles, flame or other sources of ignition
to check for gas leaks.
21− If a leak is detected, shut gas and electricity off and
repair leak.
22− Repeat steps 21 and 23 until no leaks are detected.
23− Replace access panel.
FIGURE 28
Remove five screws if necessary
(either side of cabinet)
1
2
3
4
5
