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9-HYDRAULIC CONNECTION
Technical Dept. - All rights reserved - Reproduction is prohibited
CLEANING THE SYSTEM
Install suitable shutters to cut off the tubes from the heating system.
In order to protect the heating system from damage caused by corrosion, incrustation or deposit build-up, it is important to clean the
appliance before installation, using suitable products, in compliance with Standard UNI 8065 (water treatment of thermal plants for civil
use).
As standard, RED supplied the product FERNOX PROTECTOR F1 with the product.
This provides long term protection against corrosion and calcium build-up for the heating appliance. It prevents the corrosion of the metal
parts of the appliance, i.e. the ferrous metals, copper and copper and aluminium alloys. It also reduces the noise produced by the boiler.
Refer to the instructions on the product. Cleaning should be performed by a qualified technician.
We also recommend the use of FERNOX CLEANER F3 and LEAK SEALER F4, available from our authorised distribution centres.
FERNOX F3 is a neutral product for rapid and efficient cleaning of heating appliances. It has been designed to eliminate residues, oily
deposits and incrustations from existing appliances of all ages. It can help restore the heating efficiency of the boiler and reduce the noise
it generates.
FERNOX F4 is intended to be used with all heating appliances to seal micro fractures that cause small and inaccessible leaks.
Attention: Failure to clean the thermal system or to use an adequate inhibitor will invalidate the warranty of the
appliance and of the other accessories like the pump and valves.
FILLING THE SYSTEM
Fill the system slowly to allow air bubbles to pass through the vent holes of the heating system. For closed circuit heating systems, the
filling pressure of the system at cold and the pre-inflation pressure of the expansion tank must be the same.
• In
open
vessel heating systems, direct contact between circulating liquid and air is allowed. During the heating season, the user
must check the circulating water level in the expansion tank regularly. The water level in the circulation system must be kept
constant. Practical experience shows that a regular check of the water level must be made every 14 days to maintain a relatively
constant level. When necessary, the water level must be topped up when the boiler has cooled to room temperature. This is to avoid
and damage being caused to the steel body of the boiler due to thermal stress.
• In systems with an open vessel, the water pressure in the boiler must not be less than 0.3 bar when the system is cool.
• The water used for filling the heating system must be decontaminated and not contain air.
Attention!
Do not mix heating water with incorrect concentrations of anti-freeze or anti-corrosion substances! This could
damage the gaskets and cause noise during operation.
The manufacturer denies any liability for harm caused to persons, animals or objects caused by failure to observe
these precautions.
After making all the hydraulic connections, pressure-test the seals by filling the boiler.
This must be done with care by doing the following:
• open the air vent valves of the radiators, boiler and system;
• gradually open the filling tap of the system, making sure that any automatic air vent valves in the system work correctly;
• close the vent valves of the radiators as soon as water comes out;
• use the pressure gauge inserted in the system to check that the pressure reaches a value of approximately 1 bar (this only applies to
closed vessel systems - refer to any existing local regulations or standards allowing for its installation); for open vessel systems, the
water is topped up automatically through the vessel.
• close the filling tap of the system and then open the vent valves of the radiators again to purge any air;
• check the seal of all the connections;
• after starting up the boiler for the first time and bringing the system up to temperature, stop the pumps and repeat the air purging
