Siemens LMV37.400A2 - Gas Pilot Ignition 2 Sequence

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Building Technologies Basic documentation LMV37.4... CC1P7546en
HVAC Products 6 Basic unit 01.12.2009
6.7.3 Gas pilot ignition 2 «Gp2 mod», «Gp2 mod pneu»
Int erval 2 t52
0°
0°
t1
p
P
P
P
0°
5 s
P
30 s
Prei gnition Igni tio n (Z) = ON Interval 1 t44
Operation 1 (stationary)
Atmospheric test Pressure test
Postpurge time t8
OUTPUTS
INPUTS
Fan motor (M)
FuelAir
Actuators
Control thermostat or pressurestat (R) ON
Air pressure switch (LP)
Pressure switch - valve proving (P LT)
Ignition tr ansfor mer (Z)
Alarm (AL)
POC (alternativ to pressure switch-max (Pmax)
Fuel valve 1 ( V1)
Fu el valve 2 ( V2)
Test pressure switch-min (Pmin)
Postpurge time t3
Fan motor (M) = ON Safety valve (SV) = ON
Air damper (LK) => Fu el v alv e ( V) - POS
Air damper (LK) => Ignition (Z) - POS
Operation 2 air damper (LK) => Low-fire (KL) - POS Air da m per ( LK) => High-fire (NL) - POS
Requir ed pos iti on
Required position
Required position
Figure 31: Program for gas pilot ignition (Gp2)