75
17.0 Maintenance Procedures
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.
6. Discard used insulation in an air tight
plastic bag.
NIOSH Stated First Aid:
Eye/Skin: Immediately irrigate
Breathing: Clean fresh air
17.23 Handling Previously Fired Combustion Chamber Insulation
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.
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.
WARNING
17.24 Torque Specifications Table
Torque Req'd (in-lbs)
Item
Min.
Max.
Burner Plate Nuts
44
53
Burner Head Bolts
27
31
Fan Clamp Screw
62
71
Gas Valve Screws
31
35
Venturi Screws
31
35
Ignitor Screws
27
31
