43
P/N 42-9470 11/07 Copyright 2007 Mestek, Inc.
Cast iron condensing boiler
Cast iron condensing boiler
— Installation and operation manual
Cleaning the air fi lter
Turn the boiler on/off switch
OFF
.
Remove the three thumb screws that secure the fi lter access
plate (see Figure 33).
Remove the fi lter access plate and gasket.
Pull the fi lter clamp back and remove the air fi lter.
Inspect the fi lter and the fi lter enclosure area for dust or debris.
Clean the fi lter, if necessary, by washing under running water.
Shake off excess water and towel dry.
If the fi lter enclosure and blower inlet show
signs of drywall dust, construction debris or
other deposits, you may need to inspect the
burner. Follow the procedure in this section.
Accumulation of debris in the burner can result in
burner damage and potential for severe personal
injury, death or substantial property damage.
7. If the fi lter is damaged or cannot be cleaned eff ectively, ob-
tain a replacement fi lter from your boiler distributor.
8. To replace the air fi lter, pull the fi lter clamp back, insert the
fi lter, and allow the clamp to secure the fi lter in place.
9. Replace the fi lter access cover gasket and access cover.
10. Replace the three thumbscrews and fi nger tighten securely.
11. Turn the boiler on/off switch
ON
.
Accessing the electrode assembly
Turn the boiler on/off switch
OFF
.
If the boiler ignition electrodes or fl ame rod appear to be
operating incorrectly, remove and inspect the assembly as
follows.
Do not remove the electrode assembly while the
boiler is operating. Allow the boiler and electrode
assembly to cool before att empting removal to
avoid possible burns. Failure to comply could
result in severe personal injury.
3. With the boiler and manual gas valve closed, remove the
upper electrical box cover (right side of boiler).
Remove the two ¼ inch bolts that secure the electrode/
fl ame rode assembly to the boiler (Figure 34).
Th e electrode spacing must be 1/8 inch (3.2 mm) as shown
in Figure 26.
4. If the electrodes or fl ame rod are damaged or the tip spacing
is incorrect, replace the assembly. Th e electrodes are
NOT
adjustable.
5. Re-install the assembly in the boiler.
Make sure the electrode plate gasket is in good
condition and that the assembly is securely
bolted to the boiler. Th e combustion chamber
operates with a positive pressure. Failure to
comply could result in severe personal injury,
death or substantial property damage.
1.
2.
3.
4.
5.
6.
1.
2.
•
•
Maintenance
(continued)
13
Figure 33
Accessing the air fi lter
Figure 34
Electrode/fl ame rod assembly inspection