Burnham 20_PV_I Benutzerhandbuch

General. Inspection and service should be conducted

annually. Turn off electrical power and gas supply while
conducting service or maintenance. Follow instructions
TO TURN OFF GAS TO APPLIANCE. See Figure 17.

Inspect Housekeeping. Boiler area must be clear and
free from combustible materials, gasoline and other
flammable vapors and liquids. Remove obstructions to
the flow of combustion and ventilation air.

Service Low water cut-off (if so equipped). Follow
instructions provided with low water cut-off

Inspect Vent System for obstructions in vent pipe, soot
accumulation, deterioration of pipe or joints, and proper
support:

1. Remove vent connector and vent pipe. See Figure

19.

2. Remove all obstructions. Check and clean vent

terminal screens.

3. Remove soot accumulations with wire brush and

vacuum.

4. Replace deteriorated parts.

5. Repair deteriorated joints. See Section V: Venting,

Paragraph D.6.

Inspect Boiler Flue Passages for blockage or soot
accumulation. See Figure 19.

1. Disconnect vent connector from blower discharge

flange.

2. Remove sheet metal screws securing Jacket Top

Panel. Lift panel and rotate about relief valve piping
until top of boiler is exposed. If piping or wall
prevent full rotation of top panel for access to
canopy, cut slot into relief valve opening and
remove top panel.

3. Disconnect blower connection from wiring harness

in vestibule.

4. Remove bolts securing canopy to boiler sections.

Cut silastic sealant around base of canopy, pry
canopy from boiler sections and remove canopy/
blower assembly from boiler.

5. Using flashlight, examine all flue passageways.

a. If passageways are free of soot and obstruction,

replace canopy, secure and seal using kit
available from Burnham Distributors, Part No.
6111716.

b. If passageways need cleaning, remove burners as

described in Paragraph F below. Using long
handle wire or bristle flue brush and vacuum,
brush flueways thoroughly from top of boiler as
illustrated in Figure 19. Replace canopy and seal
using kit available from Burnham Distributors,
Part No. 6111716.

6. Reinstall jacket top panel, vent pipe and vent

connector in reverse manner. Reconnect electrical
connector to blower.

1. To remove burners for cleaning, changing orifice

plugs, or repairs:

a. Remove jacket Front Panel.

b. Disconnect pilot tubing at gas valve.

c. Disconnect igniter/sensor cable and ground wire

at Ignition Module.

d. Disconnect Flame Rollout Switch wires.

e. Remove Burner Access Panel.

f. Mark Pilot Main Burner location on Manifold.

g. Hold burner on throat. Lift slightly to clear orifice.

Pull burner from combustion chamber. See Figure
11. Pilot Main Burner can only be removed by
lifting at 45° angle after adjacent burner to right is
removed.

2. Brush top of burners with a soft bristle brush. See

Figure 19. Vacuum burners.

3. Check orifices. Drilled passageways must be free of

lint or dirt.

4. Vacuum tip of Pilot Burner.

5. Clean firebox by vacuuming. Exercise care not to

disturb insulation inside base.

6. Install burners by reversing procedure used to

remove burners. Burner with pilot assembly must be
in same location as original installation. See Table 7.
Burners must be properly located on support bracket