Bosch Worcester Greenstar Ri ErP + Series - Electrode Assembly and Burner; Re-Assembly of the Burner Clamping Plate

SERVICE AND SPARES
6 720 821 670 (2018/06)54
FLAP VALVE ASSEMBLY
1.Twist the mounting flange clockwise to release.
2.Pull mounting flange off the flap valve assembly.
3.Pull rubber flap off flap valve assembly.
▶ To replace the flap valve:
– Press the two lugs on the back of the flap into the two slots in the
flap valve assembly.
Fig. 79 Flap valve assembly
7.8.10 ELECTRODE ASSEMBLY AND BURNER
▶ Refer to figure 80 and disconnect spark electrodes and flame sensor
connection.
▶ Remove clamping plate.
1.Remove spark/flame electrode assembly from heat exchanger.
2.Remove the seal from the top of the heat exchanger.
3.Remove the burner.
▶ Replace new burner in correct position.
▶ Ensure that burner tabs, as shown in figure 80, fit correctly their
respective locations.
▶ Ensure that the seal is fitted.
▶ Replace the clamping plate.
Fig. 80 Electrode assembly and burner
7.8.11 RE-ASSEMBLY OF THE BURNER CLAMPING PLATE
▶ Ensure that the new gasket is fitted, with the electrode assembly and
gasket heat shield
▶ Locate the edge of the clamping plate [7] under the bracket [4] and
fit the retaining plate [1] hand tight
▶ Ensure that the retaining plate [1] is in the position shown in figure 81
▶ At this point the Air/Gas Manifold/Fan assembly [8] should be fitted,
engage the lugs in the slots in the clamping plate and rotate clockwise
to the stop position.
▶ Rotate the retaining plate assembly [1] in the slot on the clamping
plate [2], this will prevent the Air/Gas manifold [8] rotating back
▶ Initially there will be a gap between the clamping plate and the top of
the heat exchanger, refer to figure 81
NOTICE: Heat exchanger seal
▶ If the joint between the Air/Gas manifold and heat
exchanger is disturbed sealing gasket must be
replaced.
▶ After re-assembly the combustion must be checked
using the procedure in the section 7.6 “Setting the
Air/Gas ratio”.
CAUTION: Clamping plate
▶ Ensure that the clamping plate is firmly tightened
down on top of the heat exchanger.
3.
1.
2.
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NOTICE: Heat exchanger seal
▶ If the joint between the Air/Gas manifold and heat
exchanger is disturbed the sealing gasket must be
replaced.
▶ After re-assembly the combustion must be checked
using the procedure in the section 7.6 “Setting the
Air/Gas ratio”.
CAUTION: Clamping plate
▶ Ensure that the clamping plate is firmly tightened
down on top of the heat exchanger.
1.
2.
3.
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