W:\ELECTRICAL\INSTRUCT\FURNACE\FURNACE GENERAL INSTRUCTIONS 2011.DOC
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01/2014
12 APPENDIX D - SAFETY SHUT OFF VALVE LEAK TEST PROCEDURE
FIRST PILOT SHUT OFF VALVE (1PSOV)
1.
Make sure all gas cocks ahead of equipment are open to allow gas flow to equipment and turn
off electrical power to the control panel to assure that there is no power to the pilot shut off
solenoid valves so that they are closed (1PSOV & 2PSOV).
2.
Make sure the manual test petcock (A) is closed.
3.
Remove the leak test tap plug (B) and connect 1/4" tube to the petcock.
4.
Close the pilot gas cock located between the pilot shut off solenoid valves and the burner.
5.
Immerse the 1/4" tube vertically ½ inch into a jar of water.
6.
Slowly open the test petcock (A).
7.
Gas will bubble through the water and stop. If bubbles continue, the valve is leaking and must
be replaced. Do not continue to operate burner until valve is replaced.
8.
Close the test petcock (A), remove the 1/4" tube and replace the leak test tap plug (B).
FIRST SAFETY SHUT OFF VALVE (1SSOV)
9.
Make sure all gas cocks ahead of equipment are open to allow gas flow to equipment and turn
off electrical power to the control panel to assure that there is no power to the safety shut off
solenoid valves so that they are closed (1SSOV & 2SSOV).
10.
Make sure the manual test petcock (C) is closed.
11.
Remove the leak test tap plug (D) and connect 1/4" tube to the petcock.
12.
Close the main gas cock located between the safety shut off solenoid valves and the burner.
13.
Immerse the 1/4" tube vertically ½ inch into a jar of water.
14.
Slowly open the test petcock (C).
15.
Gas will bubble through the water and stop. If bubbles continue, the valve is leaking and must
be replaced. Do not continue to operate burner until valve is replaced.
16.
Close the test petcock (C), remove the 1/4" tube and replace the leak test tap plug (D).