Draining The Appliance; Fan Assembly Removal; Air/Gas Manifold Clamping Plate Removal; Burner And Electrode Removal - Worcester Greenstar i System ErP Series Installation, Commissioning And Servicing Instructions

Service and spares
7.7.3

Draining the appliance

NOTICE: Risk of water damage to appliance or property!
Damage from disconnecting water pathways which may
have retained some water.
▶ Take care after draining appliance to protect
equipment/property from residual water content
within components.
Many of the tasks in this section require that the appliance be isolated
and drained. This will be indicated in the manual if required.
▶ Connect a suitable hose firmly to the drain point and run the hose
outside to a suitable point or container.
▶ Turn the drain valve a ¼ turn anti-clockwise to open the drain. Turn
the valve firmly clockwise to close.
Fig. 72 Draining the appliance
7.7.4

Fan assembly removal

Refer to figure 73
▶ Remove electrical connectors from fan.
▶ Remove wire clip from gas valve outlet.
▶ Pull the gas pipe free from the gas valve.
▶ Remove securing screw for the fan assembly.
▶ Lift the fan assembly out of the location slot.
Fig. 73 Fan assembly removal
56
7.7.5

Air/gas manifold clamping plate removal

Before removing the air/gas manifold clamping plate, the following
actions will need to be carried out.
▶ Remove electrical connections from the electrode assembly,
( 7.7.6, Burner and electrode removal).
▶ Remove electrical connections from the primary sensor and remove
the primary sensor, ( 7.7.12, Primary sensor (CH NTC)).
▶ Remove electrical connections from the overheat thermostat,
( 7.7.13, Overheat thermostat).
Refer to figure 74.
▶ Remove earth connection from the air/gas manifold clamping plate.
▶ Undo the securing nut on the heat exchanger.
▶ Lift the air/gas manifold clamping plate up an out of the retaining
bracket.
▶ Refer to section 7.7.11 for refitting instructions.
Fig. 74 Air/gas manifold clamping plate removal
7.7.6

Burner and electrode removal

Refer to figure 75
▶ Remove electrical connections from the electrode assembly.
▶ Remove the air/gas manifold clamping plate as shown in figure 74.
▶ Remove spark/flame electrode assembly and seal from the top of the
heat exchanger.
▶ Remove burner.
Fig. 75 Burner removal
Greenstar i System
1
6720806944-39.1Wo
- 6 720 806 945 (2015/07)
ErP