1403BSHH_AMEN,page 23/29
12.3.2 Inspect and clean the burner :
With the burner assembly removed, shine a flashlight on
the burner ribbons. Look for carbon buildup, scale, dust,
lint, and/or anything that might restrict flow through the
spaces between the burner ribbons. Holding the burner
assembly so that any foreign material will fall away from
the burner, use a stiff bristle brush to loosen and
remove any foreign material(s). If the burner is
excessively dirty, remove one of the burner end caps.
Remove the four screws that hold the end cap to the
burner housing. Lightly tap the end cap to remove it.
Clean all foreign material from the burner and venturi.
Use pressurized air to clean complete ribbon tray of the
burner. After the burner is thoroughly clean, replace the
end cap making sure that it is tight against the burner
housing. NOTE: If any of the burner components are
damaged or deteriorated, replace the burner assembly.
Figure 25
12.3.3 Reinstall the burner :
Repeat ‘Burner Removal’ steps above in the opposite
order.
12.4 Burner
orifice
The burner orifice normally needs to be replaced only
when a change in gas is made. When ordering a
replacement orifice, provide (MJ/m3) heating value and
specific gravity of gas, as well as the model and serial
number of the unit. When removing or replacing the
burner orifice be careful not to damage the venturi tube
and/or the bracket.
12.5 Ignition
system
The igniter and flame sensor are fixed on the burner
body. For replacement burner body needs to be removed
(we here for refer to section 11.3 : Burner maintenance).
Igniter
- Refer to figure 16 and locate the igniter.
Disconnect the wire; remove the screw and the igniter.
Clean the igniter assembly with an emery cloth.
Spark gap must be maintained to 3 mm.
Important: When reassembling, the wire must remain
attached to the igniter.
Flame sensor
-
Refer to figure 16 and locate the
flame sensor. Disconnect the wire, remove the
screw and the flame sensor. Clean with an emery
cloth..
Figure 26 : Flame sensor
Figure 27 : Igniter
Figure 28 :Burner body
Control relay
- See figure 29. The electronic
burner relay monitors the operation of the heater
including ignition. Do not open the control relay.
Each heating season check the lead wires for
insulation deterioration and good connections.
Proper operation of the direct spark ignition system
requires a minimum flame signal of 1.0 micro amps
(DC) as measured by a microampmeter.
For further information and check out procedure on
the direct spark ignition system and the
Troubleshooting Flow Chart.
Figure 29 : Control relay
Fuse
