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La Nordica LNK15 Manual

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C
VMA
VMA
1
3
2
60°C
DOWN-FIRED
BOILER
SYSTEM
SUPPLY
SYSTEM
RETURN
60 °C
ENGLISH
The diagrams are purely indicative, therefore they do not have design value. By law, this documentation is strictly private and condential, and it
is forbidden to reproduce, use and distribute it to third parties. Distribution that is not authorised by NORDICA S.p.a. will be subject to sanctions
according to law.
The anti-condensation mixing valve is used in solid combustion heating devices and boilers since it prevents the return of cold water into the
heat exchanger. Sections 1 and 3 are always open and, together with the pump installed on the return (R), they guarantee circulation of water
inside the heat exchanger of the biomass boiler (Down-red Boiler).
A high return temperature enables improved eciency, reduces the formation of smoke condensation and prolongs the boiler’s life-span.
Once the valve’s calibration temperature has been reached, section 2 is opened and the boiler’s water goes to the system through the supply.
IMPORTANT: failure to install the device shall render the boiler’s warranty null and void.
INPUT - DSA
thermal discharge
coil
OUTPUT - DSA
thermal discharge
coil
Mains water inlet
min 1.5 bar
Thermal discharge valve 95°C
Thermal discharge valve
probe
Non-returnable thermal
discharge valve
AUTOMATIC D.S.A. DISCHARGE DEVICE CONNECTION
According to EN 303-5, the safety heat exchanger of the LNK boiler must be equipped with a certied thermal discharge valve (can be
supplied as an OPTIONAL accessory).
If the boiler exceeds a temperature of 95 °C, this valve enables inow of cold water in order to prevent a further increase in the boiler’s
temperature.
A sucient supply of drinking water must be guaranteed to the thermal discharge valve, and it must be carried out in accordance with best
practice (public mains).
Domestic water systems are not permitted.
The thermal discharge valve must be assembled in the safety heat exchanger input (D.S.A.).
Make sure that the water pressure is constantly at min. 1.5 bar. If there are problems with the water pressure, the system must be decommissioned.
The safety heat exchanger must never be used for domestic hot water production/heating.
ANTICONDENSATION MIXING VALVE FOR 60°C RECIRCULATION CIRCUIT CAN BE SUPPLIED AS AN OPTIONAL
ACCESSORY.
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