Siemens LME7 Series Technical Instructions page 46

LME Series
LEGEND - Password Level: S = Service; O = OEM; S/O = View - Service, Write - OEM; Info = Info Menu; Ser = Service Menu
Parameter
Shaded Parameters = Frequently Used
Parameter Name
Number
PW Level
Valve Proving
241.00
Activation
241.01 Valve Proving Setup 1
241.02 Valve Proving Setup 2
242 VP Evacuation Time
243 VP Upstream Test
244 VP Fill Time
245 VP Downstream Test
SCC Inc.
Default Range
1 0-1
1 0-1
0 0-1
2.646 sec 0-2.646 sec
S/O
10.290 sec 1.029-37.485 sec
2.646 sec 0-2.646 sec
10.290 sec 1.029-37.485 sec
This setting determines if gas valve proving (leak testing) will be performed. On PME73.811A1, gas valve
proving is performed during shutdown unless the postpurge time (parameter 234) is set to 0. In that case,
valve proving occurs during startup. On PME73.840A1, gas valve proving can be performed on startup,
shutdown, or both depending on the settings of parameters 241.01 and 241.02.
0 = deactivated
1 = activated
Determines at which point during the burner's sequence that valve proving will be performed. Used in
conjunction with parameter 241.02.
0 = valve proving on startup
1 = valve proving on shutdown
Determines at which point during the burner's sequence that valve proving will be performed. Used in
conjunction with parameter 241.01.
0 = valve proving according to parameter 241.01
1 = valve proving on startup and shutdown
PME73.811A1: If valve proving is performed, this specifies the length of time that the downstream valve
(V2) is energized (output X7-02.3). This will evacuate any gas that might exist between the gas valves. Sets
the length of phase 80.
PME73.840A1: If valve proving is performed, this specifies the length of time that the upstream valve (V1)
is energized (output X7-04.4). This will fill the volume between the main gas valves to line pressure. Sets
the length of phase 80.
PME73.811A1: If valve proving is performed, this specifies the length of time that both the upstream and
downstream valves are closed. If the pressure between the valves rises during this period (enough to
open the NC valve proving pressure switch), then the upstream valve is leaking and the LME7 will lockout.
A longer time period will produce a more sensitive test. Sets the length of phase 81.
PME73.840A1: If valve proving is performed, this specifies the length of time that both the upstream and
downstream valves are closed. If the pressure between the valves falls during this period (enough to close
the NC valve proving pressure switch), then the downstream valve is leaking and the LME7 will lockout. A
longer time period will produce a more sensitive test. Sets the length of phase 81.
PME73.811A1: If valve proving is performed, this specifies the length of time that the upstream valve (V1)
is energized (output X7-04.4). This will fill the volume between the main gas valves to line pressure. Sets
the length of phase 82.
PME73.840A1: If valve proving is performed, this specifies the length of time that the downstream valve
(V2) is energized (output X7-04.4). This will evacuate any gas that might exist between the gas valves. Sets
the length of phase 82.
PME73.811A1: If valve proving is performed, this specifies the length of time that both the upstream and
downstream valves are closed. If the pressure between the valves falls during this period (enough to close
the NC valve proving pressure switch), then the downstream valve is leaking and the LME7 will lockout. A
longer time period will produce a more sensitive test. Sets the length of phase 83.
PME73.840A1: If valve proving is performed, this specifies the length of time that both the upstream and
downstream valves are closed. If the pressure between the valves rises during this period (enough to
open the NC valve proving pressure switch), then the upstream valve is leaking and the LME7 will lockout.
A longer time period will produce a more sensitive test. Sets the length of phase 83.
Page 6
Description
Technical Instructions
LME-1000
PME73. PME73. PME73.
811A1 812A1 840A1
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Section 3