Ferroli OPTIMAX 25 S Instructions For Use, Installation And Maintenance page 11

Optimax 25 S
The connecting kits shown in Fig. 4 are supplied as standard.
fi g. 4
Make Up Water
Provision must be made for replacing water lost from the sealed system. Reference should be made
to BS6798, for methods of fi lling and making up sealed systems. There must be no direct connection
between the boiler's central heating system and the mains water supply. The use of mains water to
charge and pressurise the system directly, is conditional upon the Local Water Byelaws. Again any such
connection must be disconnected after use. The supplied temporary fi lling loop is shown in fi g. 4. Ensure
the fi lling point is on the return pipe to the boiler.
Attention - is drawn to the Model Water Byelaws.
Fittings manufactured from duplex (alpha-beta) brass are not acceptable for underground use and certain
water undertakings will not accept their use above ground.
Key
1. Filling point C.H.
2. Temporary connection
3. Cold water supply
4. Double check valve
Key
A = Nut
B = Compression olive
D = 3/4 seal - Green
F = 1/2 gas seal - Blue
D
A B
F
A B
D
A B
4
3
Flow isolation valve
Gas isolation valve
Return isolation valve
2
Fig. 5
1
11