Glow-worm Ultrapower sxi Range - Manual (Page 65)

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13234
Diagram 15.22
15 Replacement of Parts
15.26 Filling Loop
For access, refer to section 15.1.
Refer to section 15.1 and drain the boiler domestic water
circuit.
Refer to diagram 12.3.
Undo the union nuts on the filling loop valve and the double
check inlet valve to remove the filling loop.
Fit new ‘O’ rings.
After replacing the filling loop open the cold-water isolation
valve and slowly open a hot water tap to remove air. Close the
hot water tap and check for any leaks.
IMPORTANT: To comply with the water regulations the
flexible hose must be disconnected from the double check
inlet valve - undo the nut and pull the flexible hose from
the valve.
15.27 Automatic Bypass Valve
For access, refer to section 15.1.
Refer to section 15.1 and drain the boiler primary circuit.
Refer to diagram 15.22.
Remove the retaining clip to remove the bypass valve.
Fit new ‘O’ rings.
Replace the bypass valve, refill, vent and pressurise the
boiler.
Adjust the bypass as described in commissioning, see section
12.8.
15.28 Pressure Reducing Valve
For access, refer to section 15.1.
Refer to diagram 15.23.
Slacken the three screws securing the pipe retaining bracket,
see diagram 8.3.
Undo the union connection at the isolation valve and then the
union nuts to remove the reduced pressure zone valve.
Fit new ‘O’ rings.
15.29 Safety Relief Valve
For access, refer to section 15.1.
Refer to diagram 15.23.
Undo the two nuts securing the safety relief valve pipe and
remove.
Loosen the grub screw to remove the safety relief valve.
15.30 Temperature and Pressure Relief Valve
For access, refer to section 15.1.
Refer to section 15.1 and drain the boiler hot water circuit.
Refer to diagram 15.24.
Undo the union nut on the right hand side of the valve and
disconnect pipe, unscrew the valve body to remove.
Apply the sealant supplied before replacing the relief valve.
13345
13334
TEMPERATURE AND
PRESSURE RELIEF
VALVE
UNION NUT
CYLINDER
TANK
BOILER / TANK MODULE
CONNECTIONS
Diagram 15.24
GRUB SCREW 6 bar SAFETY
RELIEF VALVE
3.5 bar
PRESSURE
REDUCING
VALVE
UNION NUTS
SAFETY
RELIEF
VALVE PIPE
Diagram 15.23