43
2000225065A
14.36 Hydroblock Assembly Left-Hand
Refer to section 12.9 to drain the boiler heating circuit.
Refer to section 12.10 and drain the boiler hot water circuit.
Refer to diagram 14.26.
Undo the connector on the bottom of the flow pipe from the
hydroblock.
Undo the nut connecting flow pipe to heat exchanger.
Lift the flow pipe up out of the way.
Remove the filling loop tube, refer to section14.26.
Remove the reduced pressure zone valve, refer to section
14.29.
Remove the bypass tube, refer to section 14.25.
Undo the safety discharge valve union and remove the pipework.
Remove the securing clip and withdraw the safety discharge
valve, refer to section 14.17.
Remove securing clips 1 and 2 below hydroblock, see diagram
14.26.
Undo three securing screws on the underside of the left-hand
hydroblock.
Remove the diverter switch as described in section 14.15.
14 Replacement of Parts
Diagram 14.26
Remove left hand hydroblock from plate-to-plate heat exchanger
using a TORX screwdriver to remove the securing screw, see
diagram 14.26.
Lift out the left hand hydroblock.
Remove the remaining components for refitting into the
replacement left hand hydroblock.
Refill, vent and pressurise the boiler.
Open the cold water isolation valve and slowly open a hot water
tap to remove air. Close the hot water tap.
Check for any leaks.
14.37 Diverter Valve
For access, refer to section 14.1.
Refer to section 12.9 and drain the boiler heating circuit.
Refer to section 12.10 and drain the boiler hot water circuit.
Remove the diverter switch as described in 14.15.
Refer to section 14.36 to remove the left hand hydroblock.
Unscrew and remove both halves of the diverter valve from the
left hand and right hand sides of the hydroblock, see diagram
14.27.
When replacing the two halves of the diverter valve it is
important to ensure the spindle is located correctly. This can be
observed with the left hand hydroblock removed.
SAFETY
DISCHARGE
VALVE
SECURING
CLIP 1
FLOW PIPE
CONNECTOR
PLATE TO PLATE HEAT
EXCHANGER SECURING SCREW
SECURING
CLIP 2
SECURING
CLIP 3
RH
HYDROBLOCK
LH
HYDROBLOCK
OUTLET
CONNECTOR
PLATE TO PLATE HEAT
EXCHANGER SECURING
SCREW
SECURING
CLIP 4
11499
11478
11500