100
11. unscrew the four nuts “B” in Figure 17-7;
12. remove the entire fan - burner assembly,
detail “C” in Figure 17-7;
13. use a cylindrical brush with plastic bristles to
clean the inside of the combustion chamber,
detail “H” in Figure 17-7;
14. use a vacuum cleaner to remove any
unburned residue from the combustion
chamber “H” in Figure 17-7;
15. using the same vacuum cleaner, clean
the surfaces of the burner and around the
electrodes;
WARNING!!!
While performing
the next step, carefully wash only the
inside of the combustion chamber “H”
of Figure 17-7, and do not get water on
the outside of the combustion chamber
opening. Failure to comply with this
warning can cause extensive property
damage, severe personal injury or death!
16. using only water, wash the inside of the
combustion chamber, detail “H” in Figure 17-
7. The water, will drain into the condensate
drain;
17. replace gasket “M” as per Figure 17-5 (Part
number for this gasket is 60703047). Take
care that the gasket and its site are clean.
WARNING!!!
Pay attention to
the gasket “M” (Figure 17-5) during
reassemble. When finished, perform
a leakage test with the burner firing.
Always use an approved leak detection
method. Failure to comply with this
warning can cause fire, extensive
property damage, severe personal injury
or death!
18. reassemble the components by proceeding
in reverse order. Pay attention in the
reinstalling of gasket between nut “H” of
Figure 17-5 and of the o-ring “L” of Figure
17-6. These must be in good condition. If not
they must be replaced;
19. open the manual gas shutoff valve;
20. check that there are no gas leaks;
WARNING!!!
Never use an open
flame to test for gas leaks. Always use
an approved leak detection method.
Failure to comply with this warning can
cause fire, extensive property damage,
severe personal injury or death!
21. restore electrical power to the heater.
A
H
M
020010.01.020
Figure 17-5
Nut and spring
that fixes the gas valve
L C
B
020010.01.021
Figure 17-6
Remove the gas
valve
17 - MAINTENANCE
020022.01.008
NO
YES
Summary of Contents for Esteem 399
Page 3: ...3 SAFETY INSTRUCTIONS ...
Page 5: ...5 SAFETY INSTRUCTIONS ...
Page 112: ...112 17 MAINTENANCE ...
Page 116: ...116 19 SPARE PARTS Spare parts ...
Page 135: ......
