Immergas HERCULES Condensing 26 2 E Manual page 40

Technical Documentation
Low voltage circuit.
Comando Amico Remoto
remote control
(CAR) (optional)
System pressure switch
(S5)
External probe
(B4) (optional)
Flow probe
(B1)
Return probe resistance
(R9)
Domestic hot water probe
(B2)
Super CAR
(optional)
Zones digital control unit
IMG BUS connection
(optional)
STHCkW ed 0409
Safety devices and controls.
Allows long distance control of the generator (SUM/WIN selector
switch, temperature adjustment and indication, alarms display, reset,
etc.) and acts as weekly timer thermostat.
If the CAR is installed the pre-existing X40 jumper must be
eliminated.
When the pressure of the boiler circuit is below 0.3 bar it determines
burner switch-off.
Detects the external temperature and allows the integrated
P.C.B. to vary the flow temperature depending on the external
temperature.
Allows the integrated P.C.B. to detect the temperature of the pri-
mary circuit flow water.
Its breakage (signalled by relative anomaly) blocks burner functioning
both in central heating and domestic hot water modes.
It is positioned at the outlet of the main heat exchanger.
It is a resistance that simulates the presence of the system return
probe. It must always be present.
It allows the integrated P.C.B. to detect the temperature of the
exiting domestic hot water.
Its breakage (signalled by relative anomaly) allows the boiler to
continue working in the central heating mode.
It is inserted into a hole made on the outside wall of the storage
tank to which it is fixed.
Allows long distance control of the generator (SUM/WIN fun-
ctioning, temperature adjustment and indication, programs and
parameters setting alarms display, reset, etc.) and acts as weekly timer
thermostat.
If the Super CAR is installed the pre-existing X40 jumper must
be eliminated.
It is mounted on the front inside the boiler in the top right part.
In the case of assembly of the additional zones management kits,
the board controls all electric devices connected to it (e.g. motorised
mixing valves, pumps, NTC probes, safety thermostats etc).
N.B.: in the HERCULES Condensing ABT model, the zones
digital control unit is supplied as per standard.
38
Technical Documentation
See Comando
Amico Remoto
remote control
functioning
(CAR)
Contact in
Shut-off
PTC probe
1 kΩ 25 °C
NTC probe
10 kΩ 25 °C
Factor
2,2 kΩ 1/4 W
NTC probe
10 kΩ 25 °C
See Super CAR
functioning
See functioning
technical sheet
Zones digital
control unit
HERCULES Condensing Export