Radiant RS 20 E Installation And Maintenance Manual - page 11
Installation Manual
SYSTEM BOILER – Cod. 99951NA – November 2002
8
GAS CONNECTIONS
The gas supply must be connected up by a corgi registered fitter.
The following standards must be complied with: UNICIG 7131/72 and UNICIG 7129/92 (of 21/04/93)
Before installing the boiler, make sure of the following:
• the pipeline must be of an adequate section and length to carry the flow required and must be fitted with all safety devices
and measures prescribed by current norms;
• before turning on the boiler make sure the type of gas which it is designed to run on is available
• the gas supply pressure must lie within the values shown on the plate it is recommended that the gas supply pipeline should
be checked for residual obstructions before installing the boiler;
• where the internal gas supply pipe meets the boiler, the gas isolation cock supplied with the boiler must be fitted;
• check thoroughly that the gas inlets and outlets are properly sealed.
• conversion to allow the boiler to run on LPG to natural gas or vice versa must be carried out by a qualified gas fitter in
accordance with law no.46 of 5th March ‘90 (see p.18).
ANTI-FREEZE SYSTEM
ANTI-FROST SYSTEM
Radiant boilers are equipped with an Anti-
Freeze system which comes into operation
when the temperature falls to 5° C
(Heating sensor) and 4° C (Hot water
sensor) and protects the boiler down to –
2°C external temperature.
To protect the internal Radiators, a room
thermostat or remote control must be
fitted.
NOTE: The frost system will only come into
operation if the boiler is filled with water, and
connected to a live gas supply, with electrical
supply and boiler controls in the “ON” position
(With the Main switch turned to Summer or Winter
position) ) and the gas supply turned on.
FOR THE INSTALLER
For boilers installed outdoors, where the
temperature may drop below -2° degrees
Centigrade, the system should be filled with
antifreeze liquid by an authorised technician and a
set of electrical heating elements should be fitted
to protect the domestic hot water heat exchanger.
ADVICE FOR THE SERVICE TECHNICIAN
If the boiler is out of service because it is frozen,
check that no parts have been locked in position
by ice before putting it into operation.
It is advisable to empty the boiler and the system
in case of no operation for a long period.
Recommended percentage of glycol for
temperatures down to - 8°C is 20%.The antifreeze
liquid used must be of a good make and in a
solution which has already been diluted to avoid
the risk of uncontrolled dilution.
Table n°1
Antifreeze Temperature
Ethylene glycol
(%) volume
freezing point
(°C)
boiling point
(°C)
10 -
4 101
20 -10 102
30 -
17 104
40 -
27 106
50 -
40 109
60 -
47 114
mod.
RS 20 E
RS 24 E
mod.
RS 30 E