Section 5 — Service and Maintenance
5-2 Part No. 750-263
On an annual basis the boiler vessel and burner combustion system
must be checked and cleaned. This work is to be carried out by an
authorized Cleaver-Brooks Service Technician.
A. CLEANING PROCEDURE / DISASSEMBLY
1. Close off the gas supply to the boiler and disconnect electrical
power at the primary switch box.
2. Remove the top cover of the boiler.
3. Disconnect the gas piping to the burner head.
4. Disconnect the electrical connections to the blower assembly.
5. Remove air combustion piping if supplied.
6. Unscrew the four- (4) hold down nuts securing the burner door
to the pressure vessel.
7. The burner door, burner head, blower motor and assembly will
lift on the provided gas struts (see Figure 5-2).
8. The blower motor and gas valve assembly assembly can be
removed from the boiler.
9. The burner head can be separated from the head assembly by
removing 4 bolts and washers.
Check the burner head for any damage, burn marks or perforations.
If damage is determined replace the damaged parts. If the canister
is in good condition clean out any dirt and contaminates with a
vacuum cleaner inside and out alternating with compressed air to
dislodge any debris of combustion.
1. With the burner head and blower removed the combustion
chamber can be accessed for all service requirements.
2. Check ignition and ionization electrodes for deposits and proper
gap. Clean or replace as needed.
3. Inspect the pressure vessel and combustion chamber area for
any damage or contamination (see Figure 5-3). If dirt or
contaminates are found it is recommended that the tubes be
washed with a high-pressure power washer.
Figure 5-1 Burner Head (in
place)
A. Gas Assist lift cylinders (2)
B. Burner head hold down nuts
A
B
B
B
(BOTH SIDES)
Figure 5-2 Burner Door
!
Caution
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation.
Verify proper operation after servicing.
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