GREENSTAR 12Ri ErP, Installation, Commissioning And Servicing Instructions

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SERVICE AND SPARES
Greenstar Ri ErP - 6 720 813 283 (2015/07) 43
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
Fig. 81 Initial location of the clamping plate
[1] Retaining plate assembly
[2] Clamping plate
[3] Gasket
[4] Bracket
[5] Underside view of the clamping plate
[6] Mating surface
[7] Location edge
[8] Air/Gas manifold assembly
▶ Tighten the nut on the retaining plate assembly [1] until the underside
face of the clamping plate mates with the top of the heat exchanger as
indicated by the two arrows in figure 83
Refer to figure 82 for detail of the clamping and mating surface [6]
▶ It is important to clamp the plate down firmly, without over tightening,
to the heat exchanger to ensure a gas tight seal
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.
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.
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