LME Series
Technical Instructions
LME-1000
PW Level Default Range Description
Parameter
Number
PME73.
811A1
PME73.
812A1
PME73.
840A1
LEGEND - Password Level: S = Service; O = OEM; S/O = View - Service, Write - OEM; Info = Info Menu; Ser = Service Menu
Shaded Parameters = Frequently Used
Parameter Name
241.00
Valve Proving
Activation
1 0-1
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
• •
241.01 Valve Proving Setup 1 1 0-1
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
•
241.02 Valve Proving Setup 2 0 0-1
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
•
242 VP Evacuation Time 2.646 sec 0-2.646 sec
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.
• •
243 VP Upstream Test 10.290 sec 1.029-37.485 sec
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.
• •
244 VP Fill Time 2.646 sec 0-2.646 sec
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.
• •
245 VP Downstream Test 10.290 sec 1.029-37.485 sec
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.
• •
S/O
SCC Inc. Page 6 Section 3
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