Removal Of Combustion Chamber Lining - Camus Hydronics MFH060 Installation, Operation And Service Manual

Depending on field conditions air box pressures will have to be adjusted accordingly. Always set the
appliance for a CO level in the range of 7.5% to 8.0 % for non-condensing appliances and 8.5% to 9.0%
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for condensing appliances. For propane fired appliances the setting will be approximately 1.5% higher.
A qualified service technician should follow this procedure when burner needs cleaning.
1. Shut off power and close main manual gas valve.
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Allow burner to cool before removal.
2. Remove access cover screws.
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Disconnect pilot gas at bulkhead fitting.
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Disconnect ground wire and ignition wire.
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Remove two wing nuts holding down burner.
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Gently pull down and forward to disengage burner.
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Remove burner being careful to not damage the igniter or ground electrodes.
3. Thoroughly clean burner. Check all ports and air channels for blockage.
4. Reinstall the burner being careful to fully engage the back of the burner box into the retaining slot
in the combustion chamber base. Failure to properly locate the burner will result in erratic flame
operation with the possibility of delayed ignition on light off.
5. Restore electrical power and gas supply to the boiler.
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Following the lighting instructions put the boiler back into operation
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Check for gas leaks and proper boiler and vent operation.
17.2

REMOVAL OF COMBUSTION CHAMBER LINING

The combustion chamber insulation in this appliance contains ceramic fiber material. Ceramic fibers can
be converted to cristobalite in very high temperature applications. The International Agency for Research
on Cancer (IARC) has concluded, "Crystalline silica in this form of quartz of cristobalite from occupational
sources is carcinogenic to humans (Group 1)". Normal operating temperatures in this appliance are below
the level to convert ceramic fibers to cristobalite. Abnormal operating conditions would have to be created
to convert the ceramic fibers in this appliance to cristobalite.
The ceramic fiber material used in this appliance is an irritant; when handling or replacing the ceramic
materials it is advisable that the installer follow these safety guidelines.
•
Avoid breathing dust and contact with skin and eyes.
Use NIOSH certified dust respirator (N95). This type of respirator is based on the OSHA
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requirements for cristobalite at the time this documentation was written. Other types of
respirators may be needed depending on the job site conditions. Current NIOSH
recommendations
http://www.cdc.gov/niosh/homepage.html. NIOSH approved respirators, manufacturers,
and phone numbers are also listed on this website.
Wear long-sleeved, loose fitting clothing, gloves, and eye protection
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Apply enough water to the combustion chamber lining to prevent airborne dust.
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Remove the combustion chamber lining from the water heater and place it in a plastic bag for
disposal.
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Wash potentially contaminated clothes separately from other clothing. Rinse clothes washer
thoroughly.
NIOSH stated First Aid
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Eye: Irrigate immediately
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Breathing: Fresh air
can be found
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on the NIOSH website at