Fan; Gas Valve; Expansion Vessel Removal - Worcester Greenstar i System ErP Series Installation, Commissioning And Servicing Instructions

Service and spares

7.7.16 Fan

Remove the fan assembly as described in section 7.7.4.
Refer to figure 85
▶ Remove two screws retaining the fan to the air/gas manifold [1].
▶ Remove the air/gas manifold [1].
▶ Remove the gas inlet tube [3].
▶ Remove the air inlet tube [4].
1
4
Fig. 85 Dismantling the fan assembly
Refer to figure 86
▶ With a terminal screwdriver at the point indicated [7] carefully lever
over the stop point [6].
▶ Rotate the mixing unit in the direction indicated to release.
▶ Remove the mixing unit from the fan.
6
Fig. 86 Mixing unit removal
Re-assemble with new fan ensuring mixing unit and seals are correctly
fitted.
60
2
3
5
7

7.7.17 Gas valve

Refer to figure 87
▶ Isolate gas supply at appliance gas cock.
▶ Disconnect the electrical connection from the valve.
▶ Remove wire clip [2] from gas valve outlet.
▶ Pull the gas pipe [1] free from the gas valve.
▶ Undo the bottom gas pipe connection [3].
▶ Remove the two screws securing the bracket and remove gas valve
from appliance.
1
2
3
Fig. 87 Gas valve upper connection
▶ When replacing gas valve, fit in reverse order.
▶ Check all the gas connections for gas tightness.

7.7.18 Expansion vessel removal

Refer to figure 88
▶ Ensure the appliance is isolated and fully drained.
▶ Loosen the retaining bracket screws [1], they do not need to be
removed.
▶ Undo the connection pipe [2].
▶ Pull the expansion vessel free from the appliance.
Re-assemble with new expansion vessel ensuring that:
– Align expansion vessel connection with nut ensuring the
replacement washer on connection pipe has been fitted.
– Secure expansion with clamps, taking care not to over tighten the
screws.
89
1
2
1
Fig. 88 Expansion vessel removal
Greenstar i System - 6 720 806 945 (2015/07)
ErP