Replace The Back Flow Prevention Valve - Worcester Greenstar 1000 GR1000W 24 C NG Installation And Maintenance Instructions Manual

10.8

Replace the back flow prevention valve

When replacing the back flow prevention valve, the correct assembly of
the burner door seal must be checked.
▶ Replace the burner door seal (Chapter 10.7, page 65).
2
1
Fig. 114 Remove the gas air pipe
[1] Screws (TORX T20)
[2] Gas air pipe
▶ Take out two screws (Torx T20) [1] to remove the gas air pipe [2].
1
1.
Fig. 115 Replace he back flow prevention valve
[1] Old back flow prevention valve
[2] Housing
[3] New back flow prevention valve
▶ Remove the old back flow prevention valve [1].
▶ Place the housing [2] inside the new back flow prevention valve [3].
Greenstar 1000 – 6721835943 (2023/08)
Fig. 116 Position of the back flow prevention valve on the fan
[1]
▶ Put the back flow prevention valve [1] on the fan.
▶ Ensure that the back flow prevention valve [1] is properly located into
the fan.
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2
2.
Fig. 117 Assembly of the gas air pipe, the fan and the back flow
3
[1]
[2]
▶ Put the gas air pipe [2] on the back flow prevention valve and on the
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fan.
▶ Tighten the two screws [1] (Torx T20). Do not over-tighten.
1
1
Back flow prevention valve
2
1
prevention valve
Screws
Gas air pipe
Replacement parts
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0010045902-001
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