Riello DB4 SE C03 A180 FS2 Installation, Use And Maintenance Instructions page 31

4.2 Wiring diagrams
2/
2
**
2
92/
2/
:2/
&
#
:2/
:6
6)
*
8
#8
2-
:6
MB Burner terminal strip
PA Air pressure switch
PGM Maximum gas pressure switch
PO Maximum oil pressure switch
SM1 Gas servomotor
CHAPTER
2)
2
**
2
92)
2)
341 * 
**
341
:341
# " %
4
5
:
/, +) +)0 8)+ 8)+ 5DEA@
 " # &
$
:5
95
5
TA Ignition transformer
XTB Burner earth
QRI QRI photocell
VS, VF Delivery safety valves
VR, VRS Return safety valves
Fuel supply
660-45-48645
**
8)+ 5DEA@
/, +) +)0 8)+
:
20048846
Fig. 13
11