Ferroli Optimax 25 C Instructions For Installation, Use And Maintenance Manual page 12

The isolation valve kit shown in Fig. 4 is supplied as standard.
fig. 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 filling 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. Ensure the filling point is on the return pipe to the boiler.
Attention - is drawn to the Model Water Byelaws.
Key
1. C.H. filling valve.
2. Temporary connection.
3. Cold water supply valve.
4. Double check valve.
12
Key
A = Nut
B = Compression olive
D = 3/4" seal (green)
E = 1/2" seal (green)
F = 1/2" gas seal (blue)
G = Filter
H = Cap
D
A B
Flow isolation valve
22
RED
E
A B
15
F
A B
22
E
A B
15
D
A B
G
22
BLUE
4
3
Optimax 25 C
Hot water connection
Gas isolation valve
YELLOW
Cold water isolation valve
BLUE
H
Return isolation valve
2
Fig. 5
1