15
20024198
GB
Electrical system
6.1
Electrical system (factory set)
Key to wiring diagram (Fig. 15)
CMV
- Motor contactor
LAL 1.25
- Control box
FR
- Photocell
MB
- Terminal strip
MV
- Fan motor
PO
- Oil pressure switch
RT
- Thermal cut-out
S1
- Power switch for different operations:
MAN = manual
AUT = automatic
OFF = off
S2
- Button for:
–
= power reduction
+
= power increase
SM
- Servomotor
TA
- Ignition transformer
TB
- Burner ground (earth) connection
VM
- Delivery pump valve
VS
- Delivery pump valve (safety valve)
VS1
- Safety valve on return
VU
- Valve on nozzle return
6.1.1
Electrical connections
Set up by the installer
Use flexible cables according to regulation EN 60 335-1:
if in PVC boot, use at least H05 VV-F
if in rubber boot, use at least H05 RR-F.
All the cables to be connected to the burner terminal strip 8)
(Fig. 16) must be routed through the fairleads.
The fairleads can be used in various ways. One example is given
below:
RL 190/M (Fig. 16)
1
Pg 13,5
Three-phase power supply
2
Pg 11
Single-phase power supply
3
Pg 11
Control device TL
4
Pg 9
Control device TR or probe (RWF40)
5
Pg 9
Set up for faird lead
6
Pg 11
Set up for faird lead
7
Pg 13,5
Set up for faird lead
Fig. 15
D1188
D1225
Fig. 16
