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Installation and operating instruction
Combustion manager W-FM 100 und W-FM 200
3 Product description
83054802 1/2018-07 La
40-228
3.4.8 Fuel valves Gas
The fuel valves are connected to output X9-01. The contacts are controlled in ac-
cordance with the program sequence [ch. 3.2.7].
N PE
2
1
1
2
X9-02
N
PE
L
1
2
X9-0
1
3
4
SV
L
PV
L
V2
L
V1
SV
PV
L
1
2
X9-0
1
3
4
SV
L
PV
L
V2
L
V1
L
1
2
X9-0
1
3
4
SV
L
PV
L
V2
L
V1
(1
(2
V2 / V1
2
1
N PE
L
1
2
X9-0
1
3
4
SV
L
PV
L
V2
L
V1
Output
Fuel valve
X9-01:1 (SV)
External gas solenoid valve (optional)
X9-01:2 (PV)
Ignition gas valve
(1
- or -
Gas ignition device
(2
Main gas
X9-01:3 (V2)
X9-01:4 (V1)
Double gas valve
Valve 2
Valve 1
(1
Only for burners with ignition gas tube.
(2
Only for heavy oil burners with gas ignition
Valve lift monitoring
P
1
2
X9-02
N
PE
L
1
2
X9-0
1
3
4
SV
L
PV
L
V2
L
V1
M
1
M
2
The two actuators (SKP15) of double gas valves type VGD (from DN 125) are
equipped with limit switches. The limit switches monitor the valve lift and are
switched in sequence with the voltage supply of actuator V2.
At burner start, the limit switches are bridged via a timer relay for approx. 25
seconds. If both limit switches are closed once this time has elapsed, valve V2 re-
mains open.
If a valve does not maintain the minimum lift, the relevant limit switch opens and in-
terrupts the voltage from actuator V2. Valve V2 closes and the combustion man-
ager initiates a safety shutdown with restart. The number of safety shutdowns in se-
quence set in parameter
LossOfFlame
result in a lockout [ch. 6.8.12].
Alternatively with pressure regulator on double gas valve:
If a pressure regulator (SKP25) is mounted on the gas double valve, a low gas
pressure switch monitors the valve lift. In this case, the contact of the gas pressure
switch is connected in series with the power supply of actuator V2. When starting
the burner, the gas pressure switch is bridged by a time relay for approx. 5
seconds.
3.4.9 Operational display
1
2
X8-0
1
GAS
N
OIL
Output X8-01 is controlled together with valve 1 of the current fuel. The output may
only be used as the operating display.