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1
Overall information
1.1
Overall View
Flue temperature
probe NTC
Air pressure sensor
Condensing
heat exchanger
Fan
Expansion
vessel
Main heat
exchanger
Safety
thermostat
Combustion
chamber
C.h. temp.
probe
Burner
Ignition
electrodes
Detection
electrode
Automatic
air release
valve
Primary circuit
pressure switch
D.h.w.
heat exchanger
Diverter valve
Condensate
trap
D.h.w. temp.
probe
Gas valve
Pump
Control
panel
1.2
Hydraulic diagram
Central heating (c.h.) operation
C.h.
water return
C.h.
water flow
Domestic hot water (d.h.w.) operation
D.h.w.
inlet
D.h.w.
outlet
1