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LMV Series
Pilot Valve Proving (continued)
t
= Time for setting parameters 243 and 245 in seconds
test
P
=
Inlet gas pressure (pressure upstream of both valves) in PSIG
i
P
= Gas pressure setting on pressure switch in PSIG (should be set for half of P
set
P
= Atmospheric pressure downstream of both valves in PSIA (typically
atm
14.7 PSI)
V =
Volume between the gas valves to be tested in ft
Q
= Allowable leakage rate in ft
leak
For Option 3, these times should be calculated independently for the pilot and main
valves, and the larger of the calculated times should be used as the parameter setting.
3. Parameter 226 (fuel 0) and 326 (fuel 1) should be set for the default of 2 seconds.
SCC Inc.
−
×
× 3600
=
×
3
/hr
Page 15
Technical Instructions
Document No. LV3-1000
3
)
i
Appendix A
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