10.1.9 Cleaning Condensate Trap; 10Diaphragm In Mixer Unit; 11Checking The Expansion Vessel; 12Changing The Expansion Vessel - Worcester GREENSTAR 24 Installation, Commissioning And Servicing Instructions

10.1.9 CLEANING CONDENSATE TRAP

▶ Undo screw and remove condensate trap.
▶ Check inlet from heat exchanger for clear passage.
2.
Fig. 80 Condensate trap
▶ Flush out condensate trap.
▶ Check condensate hose and clean if necessary.
▶ Fill condensation trap with approx. 250 millilitres of water and refit.
10.1.10 DIAPHRAGM IN MIXER UNIT
▶ Remove diaphragm from mixer unit [1] as shown in Fig. 67.
▶ Check the diaphragm [2] for debris and cracks.
▶ Refit the mixer unit
1
Fig. 81 Mixer unit
10.1.11 CHECKING THE EXPANSION VESSEL
According to DIN 4807, Part 2, Section 3.5, the expansion vessel must
be checked annually.
▶ Depressurise the boiler.
▶ If necessary, adjust the pre-charge pressure of the expansion vessel
to the static head of the central heating system.
6 720 811 922 (2014/07)
1.
6720800945-12.1Wo
2
6 720 612 659-50.1R
10.1.12 CHANGING THE EXPANSION VESSEL
If there is 400 millimetres or more space above the boiler and the flue
exits to the right or left, the expansion vessel can be removed without
removing the boiler from the wall.
Remove the outer case and lower the control panel into the service
position to gain access the expansion vessel connection
1. Release the clip at the pump manifold.
2. Pull the connector free from the pump manifold.
3. Lift the expansion vessel up and over the flue.
2.
1.
Fig. 82 Boiler still mounted
If there is not 400mm of head room above the boiler, the boiler must be
removed from the wall.
1. Release the clip at the pump manifold.
2. Pull the connector free from the pump manifold.
3. Lift the expansion vessel up and out of the boiler.
2.
1.
Fig. 83 Boiler dismounted
10.1.13 SETTING THE HEATING SYSTEM PRESSURE
NOTICE: Risk of damage to appliance.
▶ Only top up the heating system when the appliance is
cold.
Inspection/Maintenance
3.
3.
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