Siemens LMV5 Quick Start Manual page 82

Menu Path Parameter
Interval2Gas
or
Params & Display>
Interval2Oil
BurnerControl>
Times>
TimesStartup2
PressReacTme
MaxTmeLowFire
AfterburnTme
PostpurgeT1Gas
or
Params & Display>
PostpurgeT1Oil
BurnerControl>
Times>
PostpurgeT3Gas
Times Shutdown
or
PostpurgeT3Oil
MinTmeHomeRun
DelayLackGas
LMV5 QSG Rev 4
U = User O = OEM
S = Service
Defines the main flame stabilization period before modulation. This time begins after SafteyTme2Gas(Oil)
expires. During this period, only the main fuel valves are open. The PV (Pilot valve) is de-energized, (unless
S
continuous pilot is selected). Can be thought of as the second half of MTFI. (Main flame Trial For Ignition)
Range = 0.2 to 630 sec. Def = 2 sec. Typ = 5 sec.
Reflects the time that the LMV will "ignore" the high and low gas pressure switches after the main gas valves
open. This is done so that normal pressure peaks and valleys caused by the valve opening do not cause
O
erroneous alarms on a properly adjusted high or low gas pressure switches. Does not work with manual
reset switches. (switch stays tripped) Range = 0.2 to 10 sec Def / Typ =2 sec
Outlines the allowable time to let the LMV modulate to low fire when there is no longer a call for heat. This is
done so that the main gas valves will not close at mid to high fire, and create pressure spikes upstream in
the gas piping. Does not effect fuel valve closing in the event of a safety related shutdown. Usually set for full
modulation time of burner, (parameter OperatrampMod) Note: A setting of 0.2 seconds deactivates the
feature. Range = 0.2 to 630 sec. Def / Typ = 35 sec
Defines the permissible time for a flame to be detected after the main fuel valves are closed without causing
a startblock or alarm. This is especially useful for air postpurged oil nozzles. Range = 0.2 to 63 sec Def / Typ
= 8 sec
S
Defines the mandatory postpurge period. Even if the direct start option is selected and a call for heat exists,
the LMV will only go into prepurge after this period times out. y g
Range = 0.2 to 63 min Def = 0.2 sec Typ = 15 sec
Defines an optional postpurge period. If the direct start option is selected and a call for heat exists, the LMV
will go directly into prepurge after PostpurgeT1Gas (Oil).
Range = 0.2 to 63 min. Def = 5 sec. Typ = 0.2 sec.
Defines the minimum amount of time that the actuators must remain at rest, in their specified home
positions. (Phase 10) Range = 0.2 to 63 sec Def / Typ = 1 sec.
If there is a lack of gas pressure (low gas pressure switch open) then the LMV will wait this period of time
O
before attempting to relight, provided that the repetition Counter (RepetitCounter) for gas is set for more than
one (not done in the US). This time period will double after the first relight attempt. This doubling would
occur if the RepetitCounter were set to 3 or greater.
Range = MinTmeHomeRun to 63sec Def / Typ = 10 sec
Sec 4 Pg 26
Descriptions / Notes
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52
50
62
70
74
78
10
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