Optimax 25 S Manual - Ferroli

Optimax 25 SThe connecting kits shown in Fig. 4 are supplied as standard.KeyA = NutB = Compression oliveD = 3/4” seal - GreenF = 1/2” gas seal - BlueDABFlow isolation valveFABGas isolation valveDABReturn isolation valvefig. 4Make Up WaterProvision must be made for replacing water lost from the sealed system. Reference should be madeto BS6798, for methods of filling and making up sealed systems. There must be no direct connectionbetween the boiler's central heating system and the mains water supply. The use of mains water tocharge and pressurise the system directly, is conditional upon the Local Water Byelaws. Again any suchconnection must be disconnected after use. The supplied temporary filling loop is shown in fig. 4. Ensurethe filling 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 certainwater undertakings will not accept their use above ground.Key1. Filling point C.H.2. Temporary connection3. Cold water supply4. Double check valve34Fig. 52111