6.9.10 Burner; 6.9.11 Primary Heat Exchanger; Short Parts List - Worcester Greenstar FS 30CDi Installation, Commissioning And Servicing Instructions

SERVICING AND SPARES

6.9.10 Burner

WARNING: Burner
Do not remove the burner unless a new gasket is
available for re-assembly.
Turn the gas cock and the master switch to their OFF positions.
Isolate the appliance from the power supply.
Remove the clips [3a], castellated nuts [3b] and springs [3c] from
the studs [3].
Remove the nut [4a] from the rear stud [4].
Disconnect the mixer unit from the fan.
Remove the connector and earth wire from the fan.
Remove the burner cover plate [5] and fan assembly [6].
Remove the burner [7].
Re-assemble the new burner in reverse order.
Replace the burner seal [8] with a new one.
Refer to the section "Re-assembly of the burner cover" on page 34.
After re-assembly check that the CO/CO
section "Setting the air/gas ratio" on page 34

6.9.11 Primary heat exchanger:

Isolate the appliance from the power supply.
Turn off all the isolation valves.
Drain down the appliance.
Move the control panel into the service position.
Remove the inner case door.
Remove the fan assembly, burner, and gas mixing unit.
Disconnect and remove the sensors connected to heat exchanger.
Remove the condensate trap.
Remove the internal flue elbow and tube from the boiler sump.
Release the return pipe union [10] at the base of the heat exchanger.
Remove the plastic nut [11] from the base of the inner casing.
Release the retaining bracket [9] from the inner chassis
Remove the heat exchanger from inner casing.
Ensure that heat conductive paste is used on sensors when refitting.
Check the seals and replace if necessary.
After re-assembly check that the CO/CO
the section "Setting the air/gas ratio" on page 34.
6
3b
3c
1
3
2
Fig. 61 Primary heat exchanger
38
levels as described in the
2
levels are as described in
2
3a
4a
5
7
9
4
8
10
11
6.10

Short parts list

Burner
8 737 703 148
GC No. E27 200
Fan 42kW
8 718 644 395 0
Gas valve
8 716 118 167
GC No. H56 469
Set of electrodes including seal
8 718 664 301 0
Burner seal
8 711 004 168 0
GC No. E27 201
Flow NTC
8 714 500 087 0
GC No. E74 536
Condensate pump
8 716 114 077 0
GC No. H66 921
Fan 30kW
8 716 117 325
GC No. E74-539
Heat exchanger overheat stat
8 714 500 056
GC No. H08 291
Auto air vent
8 718 505 041 0
GC No. E00 717
Control unit
8 717 207 833 0
Flue overheat stat
8 710 506 267
Heat exchanger inspection cover seal
8 710 103 153 0
Table 14 Short parts list
Greenstar FS CDi
ErP
6720818079 (2016/04)