La Nordica Norma S Idro D.S.A пергамент [19/64] Open expansion tank system

NORMA-S IDRO DSA / STEEL / CLASSIC

7197130s - IT-EN-DE-FR 19

being national, regional, provincial or town council present in the country within which the appliance is installed, besides these present

instructions.

Installation must be carried out by authorised personnel who must provide the buyer with a system declaration of conformity and will

assume full responsibility for nal installation and as a consequence the correct functioning of the installed product.

Before installing the appliance, carry out the following checks:

• Make sure that the oor can support the weight of the appliance, and if it is made of ammable material, provide suitable insulation

(DIMENSIONS ACCORDING TO REGIONAL REGULATIONS).

• The diameter of the opening for connection to the chimney must at least correspond to the diameter of the ue gas pipe. The opening

must be equipped with a wall connection for the insertion of the exhaust pipe and a rosette.

• The installation must be appropriate and has to allow the cleaning and maintenance of the product and the ue.

Before installation, accurately wash the pipes of the system in order to remove any residuals that could compromise the correct functioning

of the appliance.

IMPORTANT:

a) It would be appropriate to install an automatic or manual air valve to allow the air outlet from the plumbing system;

b) In case of water leaking, close the water supply and promptly warn the after sales technical service;

c) The system working pressure must periodically be checked.

d) If not using the boiler for a long period of time, it is recommended that the after sales technical service is contacted to carry out at least

responsible for any product modied 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.

4.1. 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

the water oxygenation and the consequent corrosion of thermo-product and installation in a very short time.

4. AUTOMATIC THERMAL DISCHARGE VALVE DSA 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 differs 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

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.