Connection To The Gas System; Electrical Connections - Ferroli OPTIMAX 25 S Instructions For Use, Installation And Maintenance

Water treatment
If treatment is used ferroli limited recommanded only the use of Fernox or Sentinel water treatment
products, which must be used in accordance with the manufactures instructions. for further information
contact:
Fernox Manufacturing Co. LTD.
Cookson Electronics, Farsyth Road
Woking, surry, GU21 5RE
Tel: 0870 8700362
Note - If the boiler is installed in an existing system any unsuitable additives must be removed by tho-
rough cleansing. All systems should be cleansed according to B.S. 7593.
Note - In hard water areas treatment to prevent lime scale may be necessary.
Note - It is important that the correct concentration of the water treatment product is maintained in
accordance with the manufacturers instructions.

2.4 Connection to the gas system

If necessary the local Gas supplier should be consulted, at the installation planning stage, in order to
establish the availability of an adequate supply of gas.
An existing service pipe must not be used whitout prior consultation with the local Gas supplier.
A gas meter can only be connected by the Local Gas supplier, or by a Local Gas suppliers Contractor.
Installation pipes should be fi tted in accordance with BS6891.
Appliance inlet working pressure must be 20mbar MINIMUM, for NG and 37 mbar minimum for LPG.
Do not use pipes of a smaller size than the boiler inlet gas connection (22 mm).
The complete installation must be tested for gas soundness and purged as described in BS689.
All pipework must be adquately supported. An isolating gas valve is provided and should be
fi tted on the boiler gas inlet. Please wait 10 minutes when ligthing from cold before checling gas
rate. Gas pressures should be checked afther the boiler has operated for 10 minutes to reach
thermal equilibrium.
The connecting kits shown in Fig. 4 are supplied as standard.

2.5 Electrical Connections

The unit must be installed in conformity with current national and local regulations.
Connection to the electrical grid
The boiler must be connected to a single-phase, 230 Volt-50 Hz electric line.
The unit's electrical safety is only guaranteed when correctly connected to an effi cient earthing
system executed according to current safety standards. Have the effi ciency and suitability of the
earthing system checked by professionally qualifi ed personnel. The manufacturer is not responsible
for any damage caused by failure to earth the system. Also make sure that the electrical system
is adequate for the maximum power absorbed by the unit, as specifi ed on the boiler dataplate,
in particular ensuring that the section of the system's cables is suitable for the power absorbed
by the unit.
The boiler is prewired and provided with a cable for connection to the electricity line. The connections to
the supply must be made with a permanent connection and equipped with a double pole switch whose
contacts have a minimum opening of at least 3 mm, and fused at max. 3A between the boiler and the
line. It is important to respect the polarities (LIVE: brown wire / NEUTRAL: blue wire / EARTH: yellow-
green wire) in making connections to the electrical supply.
12
Optimax 25 S
Sentinel Division
Betz Dearborn LTD
Widnes, Cheshire WA8 8ND
Tel: 0151 424 5351