Cleaning The Primary Heat Exchanger - Worcester Greenstar i System ErP Series Installation, Commissioning And Servicing Instructions

Service and spares
7.6.4

Cleaning the primary heat exchanger

Refer to figure 68.
▶ It is recommended that all channels are cleaned.
▶ Remove the siphon and place a suitable container under the outlet to
catch the water and debris.
▶ Protect the controller from water ingress.
▶ Access the heat exchanger flue ways by inserting the cleaning brush
(7 733 600 091) through the top access hole in the casing, removal
of panel shown in figure 67.
▶ Clean heat exchanger flue ways using the cleaning brush removing
any debris.
▶ Re-assemble ensuring that the lower baffle and the top baffle are
refitted correctly.
▶ Refer to figure 75 when re-fitting the burner to ensure that it fits
centrally within the heat exchanger and location tabs are situated in
location holes.
▶ Ensure seal is replaced with new seal and is correctly fitted.
▶ Ensure that the clamping plate is properly secured, refer to
section 7.7.11 for procedure.
▶ Check the siphon unit is clean before refitting to appliance.
The heat exchanger does not have to be removed in
order to clean.
The heat exchanger is shown removed from the
appliance to illustrate cleaning more clearly.
Fig. 68 Cleaning heat exchanger
On completion of the heat exchanger cleaning and re-
assembly, perform the fan pressure test as described in
section 7.4
54 Greenstar i System - 6 720 806 945 (2015/07)
ErP