Glow-worm 30ci plus Instructions For Use Manual page 49

20.22 Reduced pressure zone valve (RPZ),
refer to diagram 20.12.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Drain down the boiler only, refer to relevant part of diagram
20.1.
• Pull out slotted metal clip securing pipe to RPZ.
• Pull out slotted metal clip securing RPZ into housing, remove
RPZ.
20.23 Boiler drain point, refer to diagram
20.13.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
• Drain down the boiler only, refer to relevant part of diagram
20.1.
Pull out slotted metal clip securing boiler drain valve into
housing, remove boiler drain valve.
20.24 Water flow sensor, refer to diagram
20.14.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
Drain down the hot water circuit, refer to relevant part of
Section 20.1.
• Undo the union nut on the cold water inlet isolating valve.
• Pull out slotted metal clip securing filling system tap into
housing, swing the tap forwards.
• Pull out the two slotted metal clips retaining the domestic
water inlet filter housing.
• Remove domestic water inlet filter housing.
• Remove electrical connections from water flow sensor.
• Pull off slotted metal clip and remove water flow sensor.
20.25 System water pressure sensor, refer to
diagram 20.15.
Before starting refer to the front of Section 20 Important
information.
• Remove the front panel, refer to Section 17.3.
• Lower the control panel, refer to Section 17.4.
Drain down the boiler, refer to relevant part of Section 20.1.
• Remove electrical connections from water pressure sensor.
• Pull off slotted metal clip and remove water pressure sensor.
20 Replacement of Parts
49
REDUCED PRESSURE
ZONE VALVE (RPZ)
FILLING TAP
Diagram 20.12
BOILER
DRAIN
VALVE
Diagram 20.13
WATER
FLOW
SENSOR
Diagram 20.14
4000123944-2