Crown Boiler BWF Series Installation Instructions Manual page 46

12. Service and Maintenance (continued)
!
WARNING
• Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
ATTENTION. Au moment de l'entretien des
commandes, étiquetez tous les fils avant
de les débrancher. Les erreurs de câblage
peuvent nuire au bon fonctionnement et
être dangereuses. S'assurer que l'appareil
fonctionne adéquatement une fois l'entretien
terminé.
• Failure to maintain the boiler in proper working
condition may lead to fire, explosion, personal
injury or death and extensive property damage.
• Turn off all gas and electric power supplies to the
boiler before servicing. Contact with or release
of dangerous flammable gas, electrical voltage,
moving parts and very hot water under pressure
may cause serious personal injury, property
damage or death.
• Lock electrical boxes and gas valves closed to
prevent someone from inadvertently restoring
power or gas before the heating system is safe
to operate.
• Water leaks can cause severe corrosion
damage to the boiler or other system
components. Repair any leaks found
immediately.
46
Figure 12.1: Direct Vent Air Box Removal
A. Annual Maintenance
1. Turn off electrical power and gas supply to the
boiler.
2. Inspect the flue passages for signs of blockage.
If there is any carbon in the combustion
chamber or the flue passages, clean the heat
exchanger before proceeding further. See the
cleaning procedure below.
3. Remove all burners, noting the location of the
pilot main burner. If burners show signs of
deterioration, they should be replaced (some
discoloration around the burner ports is normal).
Clean the burners by first brushing the ports
with a soft bristle brush and then vacuuming out
any debris through the venturi opening.
NOTICE: If the boiler is equipped with a direct
vent kit, it will be necessary to remove the air
intake box from the boiler in order to access
the burners and combustion chamber. This is
done by disconnecting the air intake hose and
regulator reference hose from the boiler and then
removing the mounting screws holding the box in
place shown in Figure 12.1.
4. Remove any debris found in the combustion
chamber, being careful not to disturb
combustion chamber insulation.
5. Inspect the pilot assembly. Clean any deposits
found on the electrode and grounding strap. The
ideal gap between the electrode and the ground
strap is 1/8". Inspect the porcelain for cracks
or other deterioration. Replace pilot assembly if
deterioration is found.
6. Inspect the base insulation for deterioration.
Replace if necessary.
109836-01 - 04/20