Part Number 550-110-641/0605
18
PFG SerieS 7 GaS-Fired Water Boiler — Boiler Manual
Inspect venting system:
1. Check venting system at least once a month during heating season.
With boiler in operation (at least 5 minutes), hold a candle or match
below lower edge of draft hood “skirt.” If flame is undisturbed or
leans under skirt, vent system is functioning properly. If flame is
extinguished, flickers, or reduced while flame is pushed out side
skirt, the vent system must be checked for obstructions or other
causes of improper venting.
2. Inspect all parts of venting systems for deterioration from corrosion,
physical damage, sagging, etc. Correct all conditions found.
3. Verify damper, if used, is open when burner ignites. For additional
information, see Control Supplement.
To clean boiler heating surfaces
The boiler contains ceramic fiber and fiberglass materials.
Use care when handling these materials per instructions
on page 15 of this manual. Failure to comply could result
in severe personal injury.
1. Follow shut-down procedure.
2. Remove breeching, draft hood and damper (when used).
Remove jacket top panel. Turn back jacket insulation to expose col
-
lector hood.
3. Remove collector hood. Clean excess boiler cement from collector
hood and cast iron sections.
4. Remove radiation plates.
5. Remove burners from base of boiler. Follow “To clean main burners,”
page 18, to thoroughly clean burners.
6. Place newspaper in base of the boiler to collect soot that will fall.
7. With a wire flue brush, clean between the sections.
8. Remove newspaper and soot. Vacuum or brush base and surrounding
area to remove soot.
9. Reinstall radiation plates.
10. Reinstall collector hood. Seal with boiler cement.
11. Reinstall insulation and jacket panel.
12. Reinstall burners.
When reinstalling, burner tubes must be seated in their
locating slots with the openings facing up. Gas orifices
must inject down center of burner. Failure to properly
seat burner will result in severe personal injury, death or
substantial property damage.
13. Reinstall draft hood, damper (when used), and breeching.
14. Follow “To Place in Operation” procedure.
Excessive sooting indicates improper combustion of the
gas. Call a qualified service agency or your local gas utility
to check for proper combustion and make any necessary
adjustments.
To clean main burners:
1. Vacuum or brush burners to remove dust and lint.
When reinstalling, burner tubes must be seated in their
locating slots with the openings facing up. Gas orifices
must inject down center of burner. Failure to properly
seat burner will result in severe personal injury, death or
substantial property damage.
Figure 9 Section assembly
Annual shut-down procedure:
1. Follow lighting/operating instructions label on boiler.
2. DO NOT drain the system unless exposure to freezing
temperatures will occur. If antifreeze is used with system,
do not drain.
3. If the complete boiler and piping system must be drained
to avoid freezing, then a means must be provided for
draining water from BOTH ends of the boiler at or below
the level of the return tapping. A boiler drain cock is pro-
vided by Weil-McLain on the left side of the boiler only.
To replace a boiler section
If replacing any section (see Figure 9):
• Approved RTV silicone sealant (Dow Corning 700 or
732 or G.E. 808 or 108) must be used to seal between
sections.
• Place ball bearings in the holes in the locator holes on
the sides of the sections to ensure section alignment and
reliable placement.
Failure to use PFG Series 7 intermediates
or to properly seal sections per Figure
9 can cause flue gas spillage or carbon
monoxide emissions, resulting in severe
personal injury, death or substantial
property damage.
