Technical data

28
Linea 24 & 28
8.20 Safety Valve
Part No. 1806 Refer to figs.34 & 35
8.20.1 Gain general access as 8.4.
8.20.2 Close heating flow and return valves (fig. 6) by
turning 1/4 turn until indicating lines are hori-
zontal. Pull lever on head of safety valve to
drain primary circuit to boiler.
8.20.3 Disconnect safety valve discharge pipe.
8.20.4 Loosen grub screw at base of safety valve and
pull forwards releasing valve from O' ring seal.
8.20.5 Replace in reverse order.
8.21 Removal of Electrical Components
8.21.1 Ensure electricity is switched off at main iso-
lator and gain general access as 8.4.
8.21.2 Water pressure switch
Fig. 1, no. 22
8.21.3 Gain general access as 8.4
8.21.4 Carefully remove the electrical connections to
the water pressure switch
8.21.5 Extract locking pin and remove the water
pressure swutch from the hydraulic
manifoldRemove printed circuit board cover
by releasing 5 securing screws.
8.21.6 Reassemble in reverse order ensuring cor-
rect location of electrical connctions.
(see fig. 41&43 for electrical conncections)
Fig.35
Domestic Heat Exchanger
Domestic Hot
Water Thermistor
Pressure Switch
Safety Valve
Motorised Valve
Diverter
Valve
Bobbin
Diverter
Valve
Cover
Diverter Valve
and Flow Switch
Manifold
Domestic Hot Water
Heat Exchanger Retaining
Screws
Water
Flow
Regulator