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Idiomas disponibles
Idiomas disponibles
Control of a three-way motorised valve for the DHW system
The Pellet Boiler is equipped with a control as per standard for any motorised 3-way valve to be installed on the domestic hot water circuit. A cable with 4
wires escapes from the rear part of the boiler, which can be used to control this valve. The four wires in the cable have different colours, precisely:
1.
Blue wire
2.
Black wire
3.
Brown wire
4.
Yellow/green wire
Below find a connection example using a 3-way valve with spring return. Remember that the hydraulic connection must be made in a way that when the
valve is at rest, the water passes from the gas boiler. Only when the pellet boiler temperature is sufficient (value set from control panel), the 3-way valve is
powered and therefore closes the gas boiler circuit and opens the Pellet Boiler circuit.
N.B.: the brown wire can be used to control any service relay.
Connection to the room thermostat
A bridge clamp is installed on the rear of the boiler (free contact), which is useful to connect any room thermostat. In this way, connecting an external
thermostat with the function to open or close the contact depending on the heat request will be easier.
HYDRAULIC CONNECTION
The hydraulic connections must be made in a rational way using the connections on the boiler template. To ease connection of the pipes, we have prepared
all hydraulic connections on the rear, leaving space to make the connections easily.
The boiler can be coupled to any other boiler already installed in the system; naturally it is indispensable to insert the due safety devices and shut-offs
according to the system used.
When installing the boiler, an anti-condensation mixer valve should be inserted between the flow and return of the boiler's heating system.
N.B.: The boiler can be installed with closed expansion vessel, as it is equipped with fuel loading stop device, safety manual rearm thermostat
and acoustic alarm, which intervene if temperatures are too high.
The boiler can be installed in the same room as another boiler as long has this has a sealed chamber.
THE BOILER MUST BE INSTALLED EXCLUSIVELY BY QUALIFIED STAFF. SCRUPULOUSLY COMPLY WITH THAT STATED IN THIS GUIDE;
THE MANUFACTURER DECLINES ANY RESPONSIBILITY FOR DAMAGE CAUSED BY INCORRECT ASSEMBLY.
THE NETWORK WATER INLET PRESSURE MUST NEVER EXCEED 3 BAR; RECOMMENDED WORK PRESSURE: 1.2 BAR.
DO NOT PASS ELECTRIC CABLES IN THE IMMEDIATE VICINITY OF THE FLUE GAS PIPE, UNLESS THEY ARE INSULATED WITH SUITABLE
MATERIALS.
IF THE WATER HAS HARDNESS EXCEEDING 28 °f, AN ANTI-LIME SCALE DEVICE MUST BE INSTALLED. THIS MUST BE SELECTED ON THE
BASIS OF THE FEATURES OF THE WATER.
=
COMMON TO 3-WAY VALVE
=
PELLET BOILER SIDE
=
GAS BOILER SIDE
=
EARTH
3-WAY VALVE
OPERATION PRINCIPLE
With open contact:
The boiler directly changes to functioning economy "T-OFF ECONOMY" reducing work power to minimum.
1.
2.
The boiler pump switches off.
The temperature in the boiler increases due to thermal inertia until reaching the temperature set on "SET H2O",
3.
displaying "T-H2O ECONOMY".
4.
The boiler now automatically switches off if at least one of the following conditions exist:
If it remains in Functioning Economy "T-H2O ECONOMY" for a time set on Pr44 (30 minute default
setting).
If it exceeds the temperature differential set on Pr43 (factory set value 5°C) that isH2O Temperature >
("SET H2O" + Pr43)
the pump is calibrated to start at temperatures ≥ 83°C in every condition (see parameters table).
N.B.:
ATTENTION: If the room probe is also enabled in the remote control the boiler enters economy when both
cases are met.
The boiler will automatically reactivate if both of the following conditions occur:
If the contact of the room thermostat closes.
If it drops below temperature differential set on Pr43 (5°C default setting) or Temperature H2O < ("SET H2O"
– Pr43).
If the above-mentioned condition occurs when the boiler is still carrying out the switch off cycle, it is required to wait
until it ends.
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