Siemens LMV37.4 Series Basic Documentation page 4
Basic unit with integrated fuel-air ratio control for forced draft burner
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7.2.2
Extraneous light ............................................................................................. 36
7.2.3
No flame at the end of safety time ................................................................. 36
7.2.4
Flame intensity ............................................................................................... 36
7.2.5
Supervision of flame detector ........................................................................ 36
7.2.6
Flame detection sensitivity ............................................................................. 37
7.3
Digital inputs .................................................................................................. 38
7.3.1
Safety loop X3-04 pin 1 and 2 ....................................................................... 38
7.3.2
Burner flange X3-03, pin 1 and 2 .................................................................. 39
7.3.3
Input for external load controller (ON / OFF) X5-03, pin 1 ............................ 39
7.3.4
Inputs X5-03 pin 2 and 3 (Open / Close or stage 2 / stage 3) ........................ 39
7.3.5
Air pressure switch X3-02 .............................................................................. 40
7.3.6
Gas pressure switch valve proving - or heavy oil direct start X9-04 ............. 41
7.3.7
Gas / oil pressure switch-min, start release gas X5-01 ................................. 43
7.3.8
Setting the time for making the pressure switch test ..................................... 45
7.3.9
speed-dependent air pressure switch X5-02 ................................................. 46
7.3.10
Reset X8-04, pin 1 ......................................................................................... 49
7.4
Digital outputs ................................................................................................ 50
7.4.1
Output alarm type No-SI - X3-05, pin 2 ........................................................ 50
7.4.2
Fan motor contactor type SI - X3-05, pin 1 .................................................. 50
7.4.3
Fan continuous purging X3-05, pin 3 ............................................................ 50
7.4.4
Output ignition type SI (IGNITION) X4-02 ...................................................... 51
7.4.5
Outputs fuel valves type SI V1 / V2 / V3 / PV) X8-02, X7-01, X7-02 ............. 52
7.4.6
Output safety valve type SI X6-03 ................................................................. 52
7.4.7
Output for indication of operation X8-04, pin 2 .............................................. 52
7.5
Program sequence ......................................................................................... 53
7.5.1
Time parameters ............................................................................................ 53
7.5.2
Valve proving ................................................................................................. 54
7.5.3
Valve proving with separate pressure switch X9-04 ...................................... 55
7.5.3.1.
Valve proving via gas pressure switch-min X5-01 ......................................... 56
7.5.3.2.
Lockout phase (phase 00) ............................................................................. 56
7.5.3.3.
Safety phase (phase 01) ................................................................................ 57
7.5.4
Special functions during the program sequence ............................................ 58
7.5.4.1.
Reset / manual lockout .................................................................................. 58
7.5.4.2.
Alarm upon start prevention ........................................................................... 59
7.5.4.3.
Possible start preventions .............................................................................. 60
7.5.4.4.
Repetition counter .......................................................................................... 60
7.5.4.5.
Start without prepurging (as per EN 676) ...................................................... 63
7.5.4.6.
Gas shortage program ................................................................................... 64
7.5.4.7.
Program stop function .................................................................................... 65
7.5.4.8.
Forced intermittent operation (<24 hours) ..................................................... 65
7.5.4.9.
Low-fire shutdown .......................................................................................... 65
7.5.4.10.
Continuous fan ............................................................................................... 66
7.5.4.11.
Test function for approval of burner - loss-of-flame test (TÜV test) .............. 67
7.5.4.12.
Postpurging in the lockout position ................................................................ 68
7.5.4.13.
Switching back to pilot ................................................................................... 69
7.6
Fuel trains (application examples) ................................................................. 71
7.7
Sequence diagrams ....................................................................................... 80
7.7.1
Gas direct ignition «G», «G mod», «G mod pneu» ........................................ 81
Basic Documentation LMV37.4...
17.12.201816
CC1P7546en
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