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13 - MAINTENANCE
13.15 - Functional wiring
diagram
LEGEND:
ALA - Alarm output
CM - Power control board
CR - Remote command (optional)
EA - Ignition electrode
ER - Flame detection electrode
EV3V - External three way valve (optional)
F1 - Fuse 2Amps
FPS - Flue pressure switch
GS - Spark generator
IG - Main electrical switch
J1 - Six poles connector
J2 - Four poles connector
J3 - Twelve poles connector
J4 - Four poles connector
J5 - Sixteen poles connector
J10 - Ten poles connector
J18 - Height poles connector
U1 - Supply temperature sensor
U2 - Domestic hot water temperature sensor
U3 - Domestic cold water temperature
sensor
U3 TANK - Storage tank temperature sensor
(optional)
U4 - Outside temperature sensor (optional)
U6 - Heating Safety high limit temperature
sensor
U7 - Flue gas temperature sensor
U8 - Return temperature sensor
PO1 - Heating pump
PR - Heating pressure switch
SDC - Electrical connection board
RT1 - Room thermostat connection
RT2 - Room thermostat connection on
remote control "CR" (optional)
VE - Fan
VG1 - Gas valve
V3V - Three way valve
WARNING!!! Label all wires prior to disconnection
when servicing controls. Wiring errors can cause
improper and dangerous operation! Verify proper
operation after servicing Failure to comply with
this warning can cause extensive property damage,
severe personal injury or death!
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