750-382
CBT
5-5
Fireside cleaning procedure/disassembly
Close the valves when replacing the glass. Slip a packing nut, packing washer, and packing ring onto each end of
the glass. Insert one end of the glass into the upper gauge valve body far enough to allow the lower end to be
dropped into the lower body. Slide the packing nuts onto each valve and tighten.
It is recommended that the boiler is off and cool when the glass is replaced. However, if the glass is replaced while
the boiler is in service, open the blowdown valve and slowly bring the glass up to temperature by opening the
gauge valves slightly. After the glass is warmed up, close the blowdown valve and open the gauge valves
completely.
5.4 — Fireside cleaning procedure/disassembly
1. Locate the manual shutoff gas valve for the gas supply to the burner and turn it to the closed or shut position.
2. Disconnect all electrical power to the control panel at the primary switch box or breaker box supplying power
to the boiler.
4. Disconnect power and signal harnesses from blower.
5. Disconnect the ignition cables from the electrodes and unscrew the UV flame detector from its bracket.
6. If using room combustion air, remove air filter. Inspect and replace as necessary.
7. Disconnect the burner gas train from the gas supply piping.
8. Unscrew the nuts (4) securing the blower adapter plate to the dry oven assembly.
9. The blower motor and assembly can now be removed, providing access to the burner head and combustion
chamber. The following inspections can now be performed:
• Check ignition electrodes for deposits and proper gap. Clean or replace as required.
• Check the burner canister for any damage, burn marks, or perforations. Replace if damaged. If the canister is
in good condition, clean out any dirt or dust with a vacuum cleaner or low-pressure air hose.
• Inspect the dry oven/combustion chamber area for any damage or residue. If dirt or contaminants are found, it
is recommended that the fire side be washed with a high-pressure power washer.
If any adverse conditions are observed during operation or inspection, contact your authorized Cleaver-Brooks
service representative.
When inspection and servicing are completed, reassemble the burner in reverse order.
Ensure that all connections are tight and secure before reconnecting power or fuel supply. After turning the gas
supply on, reset the gas pressure switches.
NOTE: A gas valve leak test is recommended during fireside
inspection. See Appendix A for leak test procedure.
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