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La Nordica TERMONICOLETTA EVO DSA 4.0 Manual

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ENGLISH
The DSA thermo appliances, can be installed in both an OPEN expansion Tank system and a CLOSED expansion Tank system .
LA NORDICA S.P.A. DECLINES ALL RESPONSIBILITY FOR DAMAGE TO THINGS AND/OR PERSONS CAUSED BY THE
SYSTEM. IN ADDITION, IT IS NOT RESPONSIBLE FOR ANY PRODUCT MODIFIED WITHOUT AUTHORISATION AND EVEN
LESS FOR THE USE OF NON ORIGINAL SPARE PARTS.
YOUR REGULAR LOCAL CHIMNEY SWEEP MUST BE INFORMED ABOUT THE INSTALLATION OF THE APPLIANCE SO THAT HE CAN CHECK THE
CORRECT CONNECTION TO THE CHIMNEY.
OPEN EXPANSION TANK SYSTEM
IT IS COMPULSORY THAT THE OPEN EXPANSION TANK SYSTEM IS PROVIDED WITH:
1. OPEN EXPANSION Tank: which has a capacity of 10% of total water content of thermo-product and of the installation. This is installed at
the highest point of the system, at least 2 m over the radiator that is at the highest level.
2. SAFETY PIPE : that connects through the shortest way, without descending or siphoning parts, the delivery of thermo-product to the
upper side of open expansion tank. ATTENTION: THE INSIDE DIAMETER OF THE SUPPLY PIPE WHICH CONNECTS THE THERMOPRODUCT
WITH THE OPEN EXPANSION VESSEL MUST BE EQUAL TO THE INTERNAL DIAMETER OF THE SUPPLY JUNCTION PRESENT IN THE
THERMOPRODUCT. THE ABOVE MENTIONED CONNECTION PIPE MUST BE WITHOUT SIPHONING PARTS.
3. LOAD PIPE : which connects the bottom of open expansion tank with the return pipe of installation. The minimum diameter must be ¾” gas.
All those parts must no have for any reason meditate intercept bodies that could accidentally exclude them and must be placed in rooms
which are protected from frost. On the contrary, if they freeze, the boiler body could break or even explode. In case of frost placing it will
be right to add a proper percentage of antifreeze liquid to the water of installation in order to delete the whole problem. In no way there
must be water circulation in the open expansion tank between the safety and loading pipe. This would cause the water oxygenation and
the consequent corrosion of thermo-product and installation in a very short time.
4. THERMAL DISCHARGE VALVE - VST which is a further positive safety that prevents the boiling even when electric energy is missing. It is
made by a valve cover like a pressure safety valve which diers from it as it opens by reaching a pre-calibrated temperature (normally at 94
– 95°C) and unload hot water from the installation delivery. This will be replaced with as much cold water coming from the open expansion
tank loading pipe of open tank by draining away the excessive heat.
5. SAFETY VALVE FROM 1,5 bar: maximum operation pressure allowed for the system is 1,5 bar (equal to 15 m of the water column). Higher
pressures can cause deformation and breakage of the boiler body.
6. SAFETY DEVICES envisioned by Regulations in vigour.
7. CIRCULATION PUMP : . It would be better to install it on the return in order to avoid that it could disconnect itself at very high water
temperatures but checking that it does not drive water in the open expansion tank otherwise it should cause a continuous water oxygenation
with consequent, fast corrosion of boiler body. It must be not to avoid a forced circulation in the open expansion tank. Furthermore it must
be electrically connected to a thermostat or a electronic control unit that can be purchased with the thermo-replace as OPTIONAL part.
8. ANTI-CONDENSATION MIXING VALVE – (see chapter)
ATTENTION: TEMPERATURE SAFETY SENSORS MUST BE IN PLACE ON THE MACHINE OR AT A DISTANCE NO GREATER THAN
30 CM FROM THE FLOW CONNECTION OF THE THERMOPRODUCT. WHENEVER THE THERMO PRODUCTS LACK A DEVICE,
THOSE MISSING CAN BE INSTALLED ON THE THERMO PRODUCT FLOW PIPE, WITHIN A DISTANCE NO GREATER THAN 1M FROM
THE THERMO PRODUCT. ALL THOSE PARTS MUST NO HAVE FOR ANY REASON MEDITATE INTERCEPT BODIES THAT COULD
ACCIDENTALLY EXCLUDE THEM AND MUST BE PLACED IN ROOMS WHICH ARE PROTECTED FROM FROST. ON THE CONTRARY,
IF THEY FREEZE, THE BOILER BODY COULD BREAK OR EVEN EXPLODE.
ATTENTION: FOR NO REASON MUST THE FIRE BE IGNITED BEFORE THE SYSTEM HAS BEEN COMPLETELY FILLED WITH
WATER; DOING THIS WOULD LEAD TO SERIOUS DAMAGE OF THE ENTIRE STRUCTURE. THE SYSTEM MUST BE FILLED
BY MEANS OF THE LOADING PIPE DIRECTLY FROM THE OPEN TANK IN A WAY TO PREVENT AN EXCESSIVE PRESSURE OF THE
WATER NETWORK DEFORMING THE BODY OF THE THERMO HEATING STOVE.
THE SYSTEM MUST BE KEPT CONSTANTLY FULL OF WATER EVEN DURING THE PERIODS WHEN THE USE OF THE THERMO
HEATING STOVE IS NOT REQUESTED. DURING THE WINTER, INACTIVITY MUST BE FACED WITH THE ADDITION OF ANTIFREEZE.
CLOSED EXPANSION TANK SYSTEM
IT IS COMPULSORY THAT THE CLOSED EXPANSION TANK SYSTEM IS PROVIDED WITH:
1. A SAFETY VALVE - maximum operation pressure allowed for the system is : see DECLARATION OF PERFORMANCE - CE MARKING
INFORMATION. Higher pressures can cause deformation and breakage of the boiler body. ATTENTION: THE INSIDE DIAMETER OF THE
SUPPLY PIPE WHICH CONNECTS THE THERMOPRODUCT WITH THE SECURITY VALVE MUST BE EQUAL TO THE INTERNAL DIAMETER
OF THE SUPPLY JUNCTION PRESENT IN THE THERMOPRODUCT. THE ABOVE MENTIONED CONNECTION PIPE MUST BE WITHOUT
SIPHONING PARTS.
2. ANTI-CONDENSATION MIXING VALVE – (see chapter)
3. AUTOMATIC THERMAL DISCHARGE VALVE - VAST, with double safety sensor
4. CLOSED EXPANSION Tank can be installed on the thermo product return pipe. ATTENTION: THE INSIDE DIAMETER OF THE RETURN
PIPE WHICH CONNECTS THE THERMOPRODUCT WITH THE CLOSED EXPANSION VESSEL MUST BE EQUAL TO THE INTERNAL DIAMETER
OF THE RETURN JUNCTION PRESENT IN THE THERMOPRODUCT. THE ABOVE MENTIONED CONNECTION PIPE MUST BE WITHOUT
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