You are in : CALEIDO / Technical Support / installation instructions

installation instructions

The Caleido radiators are guaranteed, provided that the installation is done by qualified personnel in a workmanlike manner, as specified in DM37/08 in force in Italy (and similarly in force in other countries).

Here you can find some helpful tips for proper installation of the radiators, such as to preserve the warranty:


Make sure the pipes making up the heating system are clean before installing the new radiator: in a new system it is essential to clear all impurities due to the construction and installation of the system itself, while in an existing system all the pipes of the circuit must be flushed carefully to remove any deposits and sludge. In any case, the presence of impurities in the system (such as residues of metal, calamine, fat, gas and encrustations) may cause the malfunction of the radiator and/or its anticipated deterioration.

It should be noted that the impurities will obstruct the water flow inside the valves and holders, thus causing the reduction of the heat output.

In this regard, we refer to DPR 59/09 in force in Italy, governing the rules for proper water treatment according to the system power and the degree of hardness of the water. If you are using a corrosion inhibitor, it must be compatible with all the materials making the radiators.

Ensure the operating pressure is between 1bar MIN/2bar MAX. If this threshold is exceeded, the boiler could get locked.

Fill the heating system with water having pH between 6.5 and 8, so as to reduce the chance for internal corrosion, which would adversely affect the proper functioning of the radiator and cause rust and leakage in the existing systems.
Due to the natural formation of air bubbles inside the heating circuit, it may be necessary to remove excess air a few times using the appropriate vents supplied. The use of dirt separators and deaerators on the line of the heating system can help prevent the formation of air bubbles and debris inside the circuit, thus avoiding such a procedure.
In the existing systems, it is advisable to properly balance the radiators through the use of special valves, or slightly closing the holder, so that the hot water can flow in all the radiators of the house at a constant temperature (from the radiator nearest to the boiler up to radiator furthest from the boiler.)
It is forbidden to use hemp, which would automatically void the warranty. These are the problems caused by the use of hemp: hemp thickens in the threads and when the installer screws the valve and holder, the radiator thread cracks, creating micro leaks which, in the long run, become macro leaks; hemp also absorbs the moisture, transmitting it to the outside of the heater itself, creating corrosion.
If you are using some antifreeze, it should be compatible with all materials of the radiator, and it should never be used pure, but diluted before being inserted into the circuit.
The heating system, being a closed circuit, must not be emptied and refilled periodically, since this would allow the entry of new air with possible oxidation of the metal parts. To prevent the formation of mold or algae we recommend the use of specific inhibitors.
The radiators installed under a shelf, in a recess, or behind a radiator cover, may lead to more or less reduced thermal performance. To overcome this problem, we recommend you consult a qualified heating engineer for the correct sizing of the radiators so as to comply with certain parameters for proper installation: minimum 110 mm from the floor, at least 150 mm from under a shelf.
Contact a qualified heating engineer to prepare a project for the correct sizing of the circuit where the radiators will be installed.