ASSEMBLY DIAGRAM XILO 20 MC W TOP - card code 4.56035.0
SCHEMA DI MONTAGGIO XILO 20 MC W TOP - scheda cod. 4.56035.0
L
J1
F
N
T A
J14
BM
SR
SS
LEGEND
BM
Modulating coil
CiR
Heating circulator
Ignition electrode
EA
EC
Control electrode
F
Fuse 2(A)
Flue control
FC
FL
Flow meter
JP1
Natural Gas/LPG selector
Hot water temperature selector
JP2
JP3
Post-circulation selector
JP4
Ignition limiting selector
Warning - One of the two gas valves only, VG or VG1, is fitted on the boiler.
CiR
J3
L1
J8
JP1
JP3
JP4
JP2
RLA
R max.
Lock-out
warning light
CONTROL PANEL
JP5
JP6
L
N
PS
RLA
Rmax. Heating max. power adjustment
SR
SS
TA
TL
TST
VG
J12
PS
J9
TF
(Low temp.)
TL
J6
Jumper to be cut
if limit thermostat
is required
3
2
1
Malfunction
ON/OFF
warning light
warning light
Jumper to be cut for low temperature
Mono-thermal/bi-thermal switch
Phase 230 V 50 Hz
Neutral
No-water pressure switch
Slow ignition power adjustment
Heating sensor
Hot water sensor
Room thermostat (if any)
Limit thermostat (if any)
VG1
J15
FL
-
+
J10
Panel
J13
connection
TST
VG
VG1
1
2
3
37
EA
EC
Safety thermostat
Gas valve SIT 837
Gas valve Honeywell
VK 4105M
Heating potentiometer
Selector: Off
Summer
Winter
Reset
Test
Hot water potentiometer