Install Instructions

31
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 Lighting/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 orifice spuds lightly
using a soft bristle brush.
d. Remove the vent pipe, vent damper, top jacket
panels and flue collector/draft diverter. Remove
baffles on MIHII™ models.
e. Brush flueways with wire brush.
f. To the extent possible, inspect inside of vent pipe
and vent damper for obstructions in flow or vent
damper movement. Remove or replace as
necessary.
g. Re-install baffles on MIHII™ models. When
replacing the flue collector/draft hood, 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 of the jacket, vent damper and
vent pipe.
i. Re-install burners.
2. Inspect entire venting system for corrosion, support
and joint integrity. Repair as necessary.
3. Check the pilot and main burner flame. See Figure
9.1. 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 9.1: 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