ASSEMBLY DIAGRAM XILO 20 MCS W TOP - card code 4.56035.0
L
J1
F
N
L1
T A
J14
BM
SR
SS
LEGEND
Modulating coil
BM
CiR
Heating circulator
EA
Ignition electrode
EC
Control electrode
F
Fuse 2(A)
Flow meter
FL
Natural Gas/LPG selector
JP1
Hot water temperature selector
JP2
Post-circulation selector
JP3
JP4
Ignition limiting selector
JP5
Jumper to be cut for low temperature
JP6
Mono-thermal/bi-thermal switch
Warning - One of the two gas valves only, VG or VG1, is fitted on the boiler.
CiR
J3
J8
JP1
JP3
JP4
JP2
RLA
R max.
3
Lock-out
ON/OFF
warning light
warning light
CONTROL PANEL
L
MP
N
PA
PS
RLA
Rmax. Heating max. power adjustment
SR
SS
TA
TL
TST
VG
VG1
J12
PS
J9
TF
TL
(Low temp.)
J6
Jumper to be cut
if limit thermostat
is required
J13
2
1
Malfunction
warning light
Phase 230 V 50 Hz
Hot water priority micro
pressure switch
Neutral
Air pressure switch
No-water pressure switch
Slow ignition power adjustment
Heating sensor
Hot water sensor
Room thermostat (if any)
Limit thermostat (if any)
J15
FL
-
+
J10
Panel
connection
TST
Safety thermostat
VG
Gas valve SIT 837
Gas valve Honeywell
VG1
VK 4105M
Fan
VN
Heating potentiometer
1
2
Selector: Off
Hot water potentiometer
3
38
EA
EC
Summer
Winter
Reset
Test