Install Instructions
FOR V5055, V5097 GAS VALVES
3 95-6981—5
Fig. 4. Valve leak test.
1. De-energize the control system to make sure no power
is applied to the safety shutoff valve (C).
2. Close the upstream manual gas cock (A).
3. Make sure the manual test petcock (F) in the leak test
tap assembly (D) is closed.
4. Remove the leak test tap plug and connect the test
apparatus to the leak test tap (D) as shown in Fig. 4.
5. Close the downstream manual gas cock (E).
6. Open the upstream manual gas cock (A).
7. Program the safety shutoff valve (C) to the fully open
position (through the safety system), then immediately
de-energize the SSOV to seat the valve operationally.
8. Immerse a 1/4-inch (6 mm) tube vertically 1/2 inch
(13 mm) into a jar of water as shown in Fig. 4.
9. Slowly open the test petcock (F).
10. When the rate of the bubbles coming through the water
stabilizes, count the number of bubbles appearing
during a ten-second period. Each bubble appearing
during a ten-second period represents a flow rate of
approximately 0.001 cf/h. To meet U.S.A requirements,
leakage must not exceed the values given in Table 2.
Table 2. Allowable leakage (cc/hr).
a
Based on air at standard conditions, test pressures provided
by ANSI Z21.21, section 2.4.2, and a maximum of 235 cc/h
per inch of sealoff diameter. Sealoff diameter is not to be
confused with pipe size.
NOTE: If two safety shutoff valves are used, check each
valve for tightness of closure.
11. Shut upstream manual gas cock (A).
12. Close test petcock (F), remove test apparatus, and
replace leak test tap plug (D).
13. Open upstream manual gas cock (A).
14. Open downstream manual gas cock (E).
15. Restore system to normal operation, and observe
through at least one complete cycle to assure proper
operation.
M9547F
GAS
SUPPLY
UPSTREAM
MANUAL
GAS COCK
DOWNSTREAM
MANUAL
GAS COCK
BURNER
DABC E
F
PRV
MANUAL
TEST
PETCOCK
SSOV
1/4 IN. (6 MM)
FLEXIBLE
TUBING
1/4 IN. (6 MM)
ALUMINUM OR
COPPER PILOT
TUBING
JAR OR GLASS
WITH WATER
CUT AT
45 DEGREE
ANGLE
CAN ALSO BE A PERMANENT PETCOCK.
PRV = PRESSURE REGULATING VALVE.
SSOV = SAFETY SHUTOFF VALVE.
USE THE DOWNSTREAM TAP ON THE SS0V.
1
2
3
4
4
2 3
1
1
2
(13 MM)
LEAK
TEST
TAP
Valve Size (in.)
Allowable
a
Leakage (cc/hr)
Number of bubbles
per 10 seconds.
3/4, 1, 1-1/4, 1-1/2 458 16
2, 2-1/2, 3 752 26
4 1003 35