23
maintenance - Cleaning
Combustion intake assembly latch
2. Remove the combustion intake assembly. See
Fig. 35. The combustion intake assembly is held into
place with two swing latches. See Fig. 37. Swing
each latch until it hangs down away from the retainer
stud. Now the assembly can be taken out by tilting
the right side outward first through the lower door
opening.
3. The units interior is now ready to clean. Use
the scraper provided to clean the heat exchanger
surfaces. A wire brush or short bristled brush is an
excellent cleaning tool. Clean the fan blade and
combustion blower fan housing. NOTE: Be careful
not to bend the fan blade while cleaning. A bent
blade will throw the fan blade out of balance. See
Fig. 38.
4. With the blower housing open, there is easy
access to the flue pipe exiting the rear of the unit.
See Fig. 38. Vacuum the flue pipe as far into the
pipe as possible. NOTE: Be careful while cleaning
the flue pipe not to bend the exhaust probe. The
ESP is approximately 8" into the tube and is visible
when looking into the exhaust.
Fig. 37
Fig. 38
ESP location
