Unical ALLBIOMIX, Instructions On Installation, Use And Maintenance

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S 4
S 5
AB A
B
SOLAR CIRCUIT
PUMP (P1)
S 0
S 3
S 2
ALLBIOMIX BOILER
EXPANSION
VESSEL
AUTOMATIC
AIR VENT VALVE
3 BAR
SAFETY VALVE
DHW SYSTEM WITH
RECIRCULATION
MANUAL
MIXER
VALVE
THERMOSTATIC
MIXER VALVE
WATER
MAINS
STORAGE
EXCHANGER
55°C
AUTOMATIC
MIXER VALVE
BOILER
PUMP (P2)
HEATING SYSTEM
PUMP (P3)
FLUE GAS PROBE
3.12.2 - ALLBIOMIX BOILER SYSTEM FOR HEATING AND FOR THE PRODUCTION OF
DOMESTIC HOT WATER, WITH SOLAR SYSTEM
This diagram shows a stratification heat storage tank for the
production of domestic hot water.
The boiler can be installed with either an open or a closed
expansion vessel (as per the collection ''R'' standards).
In the case of a system with closed expansion vessel, the
installer must assemble a minimum/maximum water pressure
switch and the safety heat exchanger.
The diagram shows the
P3 heating system pump, the P2
storage tank pump, and the P1 solar panel pump.
NB: The 55°C mixing valve is essential; it serves the
purpose of balancing the flow and return temperature of
the boiler and adds cold water when necessary to prevent
the risk of condensation.
The
S2
,
S3
,
S4
and
S5
probes, and, if solar panels are installed,
the
S0
probe, are required in this configuration.
The S5 probe reads the return line temperature and is used to
calibrate the mixing valve.
The
P2
storage tank pump is enabled when the boiler
temperature (the
S4
probe) is above the minimum boiler
temperature (normally at 50°C).
The storage tank pump is enabled when the
S4 boiler flow
probe detects a temperature above that of the
S2
probe plus a
heat differential (normally at 6°C).
Running the heating system:
In this configuration, the P3 heating system pump is connected
directly to the storage tank and depends, therefore, not on the
boiler temperature but on the temperature of the storage tank.
The heating system pump reacts to the temperature detected
by the
S3 probe and works in relation to parameter 3 (minimum
boiler temperature).
If the temperature of the storage tank is, therefore, equal
to or greater than the minimum temperature, the input
chronothermostat (input 15-16 of the control unit) enables the
P3 heating system pump even when the boiler is cold.
If you have a coil-type combi storage tank and wish to use the
solar panels, you need to enable the
S0
solar panel probe.
Sensor legend:
S0 : solar panel temperature sensor
S2 : temperature sensor at base of storage tank
S3 : temperature sensor at top of storage tank
S4
: flow temperature sensor of the boiler
S5
: return temperature sensor of the boiler