Table of Contents
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1
OVERALL INFORMATION
1 .1 Overall View
pressure switch
Electric actuator
diverter valve
Three way
diverter valve
D.H.W.
temperature probe
Gas valve
Figure 1 .1
1 .2 Hydraulic diagram
Central heating (C.H.) operation
water return
Figure 1 .2
- 4 -
OVERALL INFORMATION
Flue temperature
probe NTC and
Safety thermal fuse
Condensing
heat exchanger
Burner
Ighition/Detection
electrode
NTC heating delivery probe -
NTC maximum temperature
Air/gas mixer
Condensate
trap
Main circuit
C.H.
C.H.
water flow
D.H.W. flow switch
Domestic hot water (D.H.W.) operation
Expansion
vessel
Fan
C.H. pressure
relief valve
Automatic air
purger valve
D.H.W. heat
exchanger
Pump
D.H.W.
D.H.W.
inlet
outlet
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