Overall View; Hydraulic Diagram - Biasi RIVA COMBI Service Manual

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Second Part
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1

Overall View

Air pressure
switch test points
Air pressu
re switch
Fan
Primary heat
exchanger
Combustion
chamber
Ignition
electrodes
Flame-detec
ting electrode
Automatic air
purger valve
D.h.w. expan
sion vessel
Pump vent plug
Pump
Modulation
gas valve
Three way
diverter valve
Primary circuit
flow switch
2

Hydraulic Diagram

C.h. water return
RIVA COMBI SERVICE MANUAL – REV A
M35.30CB
D.h.w. sto
rage tank
Burner
D.h.w.
PRV
C.h. expan
sion vessel
Main circuit air
breathe valve
Gas valve outlet
pressure test point
C.h. temp.
probe NTC
Gas valve inlet
pressure test point
C.h.
PRV
Modulation
operator
Safety
thermostat
Control
panel
fig. 1
C.h. water flow
fig. 2
Maintenance Characteristic Verification
D.h.w. tempera
Main circuit
ture probe NTC
drain cock
Magnesium
anode
C.h.
Gas
C.h. flow
return
Storage tank
drain cock
D.h.w.
D.h.w
D.h.w
outlet
. PRV
C.h.
. inlet
PRV
D.h.w.outlet
D.c.w.inlet
M35.30CB - 1