42
ASSEMBLY DIAGRAM XILO T 20 MS W TOP
- card code 4.56040.0
L
N
J1
F
J14
L1
CiR
J3
J15
TL
J6
J13
J9
J8
BM
JP4
JP3
RLA
Rmax.
SR
PS
JP5 (BASSA TEMP.)
JP1
FC
TA
JP6 JP7
VG
J12
TST
VG1
EA
EC
Resist. kohm 1
2
1
3
J4
VN
PANEL
CONNECTION
JUMPER TO BE CUT
IF LIMIT THERMOSTAT
IS REQUIRED
MODULATOR
Lock-out warning light
ON/OFF warning light Malfunction warning light
J10
MP
+ S
LEGEND
BM
Modulating coil
CiR
Heating circulator
EA
Ignition electrode
EC
Control electrode
F
Fuse 2(A)
JP1
Methane/LPG selector
JP3
Post-circulation selector
JP4
Ignition limiting selector
JP5
Jumper to be cut for low temperature
JP6
Mono-thermal/bi-thermal switch
JP7
Gas valve switch
L
Phase 230 V 50 Hz
N
Neutral
PA
Air pressure switch
PS
No-water pressure switch
RLA
Slow ignition power adjustment
Rmax.
Heating max. power adjustment
SR
Heating sensor
TA
Room thermostat (if any)
TL
Limit thermostat (if any)
TST
Safety thermostat
VG
Gas valve SIT 837
VG1
Gas valve Honeywell
VK 4105M
VN
Fan
1
Heating potentiometer
2
Selector: Off
Winter
Reset
Test
3
Fixed knob
Warning:
One of the two gas valves only, VG or VG1, is fitted on the boiler.
