LME Series
Technical Instructions
LME-1000
PW Level Default Range Description
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
Parameter
Number
PME71.
111A1
PME71.
112A1
PME71.
901A1
241.00
Valve Proving
Activation
0 0-1
This setting determines if gas valve proving (leak testing) will be performed. 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
If valve proving is performed, this specifies the length of time that the downstream valve (V2) is energized
(output X7-01.3). This will evacuate any gas that might exist between the gas valves. Sets the length of
phase 80.
•
243 VP Upstream Test 10.290 sec 1.029-37.485 sec
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.
•
244 VP Fill Time 2.646 sec 0-2.646 sec
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.
•
245 VP Downstream Test 10.290 sec 1.029-37.485 sec
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.
•
247 Intermittent Pilot 0 0-1
Sets the type of pilot being used. If set to 1, the pilot valve will remain open from phase 40 to the end of
main operation (oP1).
0 = interrupted pilot
1 = intermittent pilot
• •
254
Time
(FFRT)
1 0-1
Sets the flame failure response time (FFRT). The FFRT is the maximum length of time that the flame signal
can go away before a lockout occurs. This setting also doubles as the length of time the signal from the air
pressure switch can go away before a lockout occurs. On PME71.901A1, the FFRT is fixed at 1 second.
0 = 1 second
1 = 3 seconds
• •
257 Trial for Ignition
111 - 4.116 sec
112 - 4.116 sec
901 - 2.205 sec
0-13.23 sec
On PME71.111A1 and PME71.112A1, this setting defines the overlap of the spark (output X4-02.3) and the
pilot valve (output X7-01.3) if a pilot is used.
On PME71.901A1, this setting defines the overlap of the spark (output X4-02.3) and the main valves.
After this time expires, the spark is de-energized. The LME7 has a base time of 0.3 seconds. This setting
adds seconds to the base time. Sets the length of phase 40.
• • •
S/O
SCC Inc. Page 6 Section 2
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