User Guide

8
Figure 7: Typical Vent System Installation
User Maintenance
A. General Housekeeping (Continuous)
1. Keep boiler area clear and free of combustible
materials and obstructions to the free ow of
combustion and ventilation air to the boiler.
2. Do not store or use gasoline or other ammable
vapors or liquids in the vicinity of the boiler or any
other appliance.
3. Do not store or use sources of hydrocarbons in the
vicinity of the boiler. Sources of hydrocarbons
include bleaches, cleaners, chemicals, sprays, paint
removers, fabric softeners, cat litter and refrigerants.
B. Flush Low Water Cutoff (Weekly, or more
frequently if needed). Applicable to McDonnell
& Miller 67 oat low water cutoff only. Follow
instructions on Blow-Down Card afxed to Jacket
adjacent to low water cutoff.
C. Inspect Vent System (Monthly). See Figure
7. Follow instructions TO TURN OFF GAS TO
APPLIANCE (see Figure 4, 5 or 6) and contact
a qualied service agency if any of the following
conditions are found:
1. Collapsed vent pipe
2. Disconnected or loose joints
3. Sags in horizontal runs
4. Corrosion or other deterioration
5. Broken or loose supports
6. Blocked vent switch not attached to draft hood.
D. Inspect Pilot and Main Burner Flame (Monthly).
1. Adjust thermostat to lowest setting.
2. Remove front removable panel. See Figure 3.
3. Locate Pilot Observation Port. See Figure 2.
4. Check pilot burner ame.
a. Intermittent Ignition (EI), see Figure 9. The
pilot burner produces three (3) ames. The
center ame should be steady, medium hard blue
enveloping 3/8 to ½ inch of sensing probe. If
ames are yellow and lazy, follow instructions
TO TURN OFF GAS TO APPLIANCE
(see Figure 4 for Models IN3I through IN11 or
Figure 6 for Model IN12) and contact a qualied
service agency.
b. Continuous Ignition (Standing Pilot), Models
IN10 - IN12. See Figure 8. Pilot burner
produces three (3) ames. The center ame
should be steady, medium hard blue enveloping
3/8 to ½ inch of thermocouple. If ames are
yellow and lazy, follow instructions TO TURN
OFF GAS TO APPLIANCE (see Figure 5) and
contact a qualied service agency.
5. Adjust thermostat to highest setting.
6. Check main burner ames. See Figure 10 or 11.
Flame should have clearly dened inner cones with
no yellow tipping. Orange-yellow streaks caused
by dust should not be confused with true yellow
tipping. If yellow ames are observed, follow
instructions TO TURN OFF GAS TO APPLIANCE
(see Figure 4, 5 or 6) and contact a qualied service
agency.
7. Adjust thermostat to normal setting.
WARNING
Service on this boiler should be undertaken only by trained and skilled personnel from a qualied service
agency. Inspections should be performed at intervals specied in Installation, Operating and Service
Instructions and this manual. Maintain manuals in a legible condition.
Keep boiler area clear and free of combustible materials, gasoline and other ammable vapors and liquids.
Do not place any obstructions in boiler room that will hinder ow of combustion and ventilation air.