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Key to layouts
A1
Control box
B
Protection against radio interference
BP
Pressure probe
BT
Temperature probe
B7
UV cell (intermittent operation)
F1
Thermal cut-out
G1
Power regulator RWF
H1
Remote lock-out signal of leak detection control device
H
Remote lock-out signal
K1
Fan motor contactor
K10
Relay
K11
Relay
MV
Fan motor
MP
Pump motor
SM
Servomotor
PA
Air pressure switch
PGmin Min. gas pressure switch
PGM
Max. gas pressure switch
TL
Load limit remote control system:
shuts down the burner when the boiler temperature or
pressure reaches the preset value.
TR
High-low mode load remote control system:
controls min. and max. output.
TS
Safety load control system:
operates when TL is faulty
IN
Burner manual stop switch
RS
Lock-out reset button
S40
Switch for following operations:
MAN = manual
AUT = automatic
OFF
S43
Button for:
- = power reduction
+ = power increase
S47
Oil/gas selector
T1
Ignition transformer
XMB
Burner terminal strip
VS
Safety valve (gas)
st
VR
1
stage adjustment valve (gas)
YVPS
Gas leak detection control device
Y20
Safety valve (gas oil)
st
Y21
1
stage adjustment valve (gas oil)
nd
Y22
2
stage adjustment valve (gas oil)
XP4
4 pole socket
XP6
6 pole socket
XP7
7 pole socket
X4
4 pole plug
X6
6 pole plug
X7
7 pole plug
st
h1
1
stage hour counter
Y
Gas valve unit
TB
Burner ground
Q1
Three-phase disconnect switch
Q2
Single-phase disconnect switch
F
Fuses for three-phase line protection
T6A
Fuses for single-phase line protection
+BB
On board burners components
+BC
On board boiler components
+MB
Base plate burners components
20034985
Appendix - Electrical panel layout
50
GB
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