Safety Relief Valve Replacement; Dhw Cylinder Relief Valve Replacement - IDEAL istor HE260 Installation And Servicing

81 SAFETY RELIEF VALVE REPLACEMENT

4

82 DHW CYLINDER RELIEF VALVE REPLACEMENT

istor system store -
Installation and Servicing
SERVICING
ist9859
4
ist9869
Note.
To gain access to the discharge
pipe nut, it may be necessary to
remove the CH flow pipe from
the appliance.
1. Remove the casing bottom
2. Drain the cylinder. Refer to
3. Remove the valve.
4. Fit the new relief valve.
5. Reassemble in reverse order.
6. Check operation of the boiler.
1. Remove the casing bottom
panel. Refer to Frame 53.
2. Drain the boiler. Refer to Frame
85.
3. Remove the discharge pipe.
4. Remove the valve and pressure
gauge.
5. Transfer the pressure gauge to
the new relief valve.
6. Reassemble in reverse order.
7. Fit the new safety valve and refit
the securing pin.
8. Re-assemble in reverse order
ensuring correct location of
screws in support plate and
that tabs on the pump and valve
housings engage in slots.
9. Reconnect the discharge pipe.
10. Check operation of the boiler.
Refer to Frame 49.
panel. Refer to Frame 53.
Frame 86.
Refer to Frame 49.
57