Removing The Heat Exchanger Assembly; Checking The Strainer In The Cold Water Pipe And The Flow Turbine Operation - Worcester Greenstar 4000 Installation And Maintenance Instructions Manual

9.3

Removing the heat exchanger assembly

▶ Remove the fan, gas hose, mixing device and burner cover as
described in Chapter 8.7.1 "Checking the electrodes and cleaning
the heat exchanger", page 59.
Separating components from the heat exchanger assembly.
Refer to figure 85.
▶ Separate components from the heat exchanger assembly in the
sequence shown.
– Release the clip.
– Detach the flow connection.
– Disconnect the cable from the heat exchanger temperature
limiter.
– Disconnect the in-line connector from the flow temperature
sensor on the heat exchanger.
– Disconnect the cable from the flue gas temperature limiter.
– Remove the nut.
2.
Fig. 85 Separating components from the heat exchanger assembly
Removing the heat exchanger assembly
Refer to figure 86.
▶ Release the flue pipe clip.
▶ Push the flue pipe up.
▶ Remove the bracket screws.
Greenstar 4000 – 6 720 891 161 (2020/09)
3.
1.
4.
5.
6.
▶ Remove the heat exchanger assembly.
2.
1.
Fig. 86 Removing the heat exchanger assembly
9.4 Checking the strainer in the cold water pipe and the
flow turbine operation
Checking the strainer.
Refer to figure 87.
▶ Remove the clip [4].
▶ Loosen the cold water pipe nut [3] and disengage the pipe from the
flow turbine.
▶ Pull the strainer [1] out of the cold water pipe [2].
– Check for contamination and clean thoroughly.
3
4
Fig. 87 Removing the strainer from the cold water pipe
Replacement parts
3.
4.
0010036212-001
1
2
0010035014-001
65