andrews R18 Series, Техническая документация инструкция

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18IP22B
37
8. Open and close the gas service cock to pressurise up to
the 2nd safety shut off valve.
9. Allow 1 min. for temperature stabilisation and then check
for any loss of pressure at the gauge during the next 2
minutes.
10. If there is a pressure loss the pipework between the 1st
and 2nd safety shut off valve should be checked with a
suitable leak detection fluid with the gas service cock
open.
11. If no leak is found this indicates that the 2nd safety shut
off valve is letting by and should be replaced.
12. Seal test point 10/2, replace pressure gauge on unsealed
test point 10/1 and open pilot manual cock.
13. Open and close the gas service cock to pressurise up to
the pilot safety shut off valve.
14. Allow 1 minute for temperature stabilisation and then
check for any loss of pressure at the gauge during the
next 2 minutes.
15. If there is a pressure loss the pipework upstream of the
pilot safety shut off valve should be checked with a suit-
able leak detection fluid with the gas service cock open.
16. If no leak is found this indicates that the pilot safety shut
off valve is letting by and should be replaced.