PB Heat DE - Manual (Page 36)

34
E. ANNUALLY (BEFORE START OF HEATING
SEASON)
1. Check flueways and burners for cleanliness and
clean if necessary. Use the following procedure if
cleaning is required:
a. Refer to the Operating Instructions in Figure 7.3
to properly turn off the gas to the boiler.
b. Turn off all electrical power to the boiler.
c. Remove burners and brush gas outlet ports
lightly using a soft bristle brush.
d. Remove the vent pipe from fan adapter, top
jacket panel, flue collector/fan assembly and flue
baffles.
e. Brush flueways with wire brush.
f. To the extent possible, inspect inside of vent pipe
for obstructions. Remove or replace as necessary.
g. Re-install baffles. When replacing the flue
collector/fan assembly, be certain that the blanket
seal between the flue collector and top section
makes a tight seal to prevent leakage of the
products of combustion.
h. Re-install the top jacket panel and vent pipe.
i. Re-install burners.
2. Inspect entire venting system for corrosion, support
and joint integrity. Repair as necessary. Inspect vent
termination for any obstruction that may hinder
proper venting.
3. Check the pilot and main burner flame. See Figure
8.3. The pilot should provide a steady flame
enveloping 3/8
″ to 1/2″ (1 cm to 1.2 cm) of the
flame sensor. If required, adjust the pilot as stated in
the gas valve manufacturer’s instructions. The main
burner flame inner cone should be approximately 1-
1/2
″ (4 cm) high and should have a very sharp, blue
color characteristic.
MAINTENANCE
Figure 8.3: Intermittent Pilot and Main
Burner Flame
When servicing or replacing components, be
absolutely certain that the following conditions are
met:
● ● Water, gas and electricity are off.
● ● The boiler is at room temperature.
● ● There is no pressure in the boiler.
DANGER