Green Heating Technology
14
SERVICE
Manual
City Class F-FR
Electrical diagram F
1 Flue pressure switch (*)
4 Flame ignition/detection electrode
5 Safety thermostat on system flow (*)
6 Temperature Sensor, system flow
7 Motorized 3-way valve
10 Pump
12 Priority flow switch (with filter) (*)
13 Loss of water pressure switch (*)
14.1 Gas valve - modulation control
14.2 Gas valve - opening control
15 DHW temperature sensor
23 Fan
41 Fuse F2A (2A fast)
(*) the contacts of these components are shown
in rest conditions (cold condition, no system
pressure, no flow)
Optional external devices:
TA Room thermostat: (or Chronothermostat) SELV
simple contact. Closed contact = heating request.
or Remote control (original accessory only)
SE To optional outdoor temperature sensor
Abbreviations: COM Common • NC Normally
closed (contact) • NO Normally open (contact)
• HEA Heating (diverting command) • DHW Hot
water (diverting command)
Colours: BF BlacF • BN Brown • BU Blue ● GN Green
• RD Red • OG Orange • VT Violet • WH White
• YE Yellow • YG Yellow-Green
F
1 2
4
3
PE
N
L
M0101
M0102
M0901
M0900
M0904
NC
NO
NC
NO
3
4
2
1
YG
BN
BU
3 DH
W
2 CO
M
1 HE
A
WH
BK BK
RD
BU BU
BK
BK OG
OG
VT
VT
GN
GN
WH
WH
BU
BU
RD
BN
YG
BU
BN BU
BU BN
BK
41
7
1
15
6
12
5
13
14.2
14.1
10
23
00354 INT 01
L N
SE
TA
4