Topping Up The System Pressure - Worcester Greenstar 4000 User Instructions

Prepare for operation
3.2

Topping up the system pressure

Your installer should have informed you where to find the filling system
and instructed you in its use.
NOTICE
System fill method
▶ You must remove the "filling key" or disconnect the external filling
loop after re-pressurisation, to comply with the Water Authority
regulations.
To aid in filling the system.
▶ Ensure the Central Heating is on.
(optional accessory)
Automatic filling facility
The automatic filling device refills the water into the heating system as
required. Your installer programmes the filling device according to your
heating system. Have your installer explain the function of the automatic
filling device to you.
Automatic refilling keeps the pressure in the heating system at the
programmed value.
Fig. 4 Automatic filling facility
Removal and replacement of bottom panel
To gain access to the filling link, remove the bottom panel.
Press in the tabs [A] and pull the bottom panel down to remove.
C
B
Fig. 5 Bottom panel
To replace the bottom panel, ensure that the tabs [B] line up with the
edges of the boiler [C] and push into place until the tabs [A] click into
place.
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C
A
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(optional accessory)
Keyless filling link
Locate the filling link (underneath the appliance on the right hand side)
and follow the instructions for re-pressurising the system.
Re-pressurise the system.
▶ To start the filling process, pull the lever [1] down.
– The pressure menu indicator moves, the displayed message may
change.
▶ To stop the filling process, Release the lever [1] when the:
– Pressure menu [2] indicates the pressure is ok and the pressure
menu indicator is in the green zone.
▶ Top up the system pressure, if as a result of the air bleeding, the
pressure drops off.
Fig. 6 Keyless filling link
(optional accessory)
Keyed filling link
Remove the bottom panel to locate the filling key and filling link
(underneath the appliance on the right hand side), follow the
instructions for re-pressurising the system.
Refer to figure 7.
▶ Locating the filling key into position.
– Push the filling key [3] firmly into the body of the filling link,
ensuring the arrow [4] on the key shaft lines up with the open
padlock [1] symbol.
– Turn the filling key [3] to the right, to the stop, ensure the key is
locked and that it cannot still turn. The arrow [4] should line up
with the closed padlock [2] symbol.
Re-pressurise the system.
Do not over-tighten the white knob [6] when closing.
▶ To start the filling process, turn the white knob [6] to the left.
– The pressure menu indicator moves and the displayed message
may change [5].
B
▶ To stop the filling process, turn the white knob [6] to the right to close
the valve when:
– The pressure menu reads OK and the pressure menu indicator is
in the green zone [7].
▶ Top up the system pressure, if as a result of the air bleeding, the
pressure drops off.
Once the pressure has settled between 0.8 and 1.7 bar.
▶ Ensure the valve is closed.
▶ Remove the filling key.
– Turn the filling key [3] to the left, to the stop, so that the arrow {4]
lines up with the open padlock symbol [1].
– Pull the key straight down to remove. Please remember to store
the key in a safe place.
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Greenstar 4000 – 6 720 891 170 (2020/09)
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