17.0 Maintenance Procedures
17.22 Review With Owner
Ensure the owner understands the importance
to perform the maintenance schedule specified
in this manual.
Remind the owner of the importance to call a
licensed contractor should the unit or system
exhibit any unusual behavior.
17.23 Handling Previously Fired Combustion Chamber Insulation
Avoid Breathing and Contact with Skin
and Eyes
When removing or repairing the combustion
chamber insulation follow these precaution
measures:
1. Use a NIOSH approved respirator which
meets OSHA requirements for cristobalite
dust, similar to N95. Contact NIOSH at
1-800-356-4676 or on the web at
www.cdc.gov/niosh for latest recommen-
dations.
2. Wear long sleeved, loose fitting clothing,
gloves and eyes protection.
3. Assure adequate ventilation.
4. Wash with soap and water after contact.
5. Wash potentially contaminated clothes
separately from other laundry and rinse
washing machine thoroughly.
17.24 Torque Specifications Table
Item
Burner Plate Nuts
Burner Head Bolts
Fan Clamp Screw
Gas Valve Screws
Venturi Screws
Ignitor Screws
WARNING
The combustion chamber insulation con-
tains ceramic fibers, which are classified
as a possible human carcinogen. When
exposed to extremely high temperatures,
the ceramic fibers, which contain crys-
talline silica, can be converted into
cristobalite.
6. Discard used insulation in an air tight
plastic bag.
NIOSH Stated First Aid:
Eye/Skin: Immediately irrigate
Breathing: Clean fresh air
Torque Req'd (in-lbs)
Min.
44
27
62
31
31
27
75
Max.
53
31
71
35
35
31