Manual Worcester-Bosch Greenstar 2000 - GR2300iW C (page 7 of 20) (English)

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Prepare for operation

Greenstar 2000 – 6 721 820 553 (2020/01)

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 disconnect the external filling loop after re-pressurisation,

to comply with the Water Authority regulations.

External filling loop

Once the external filling loop and pressure gauge has been located,

follow the instructions for re-pressurising the system.

Refer to figure 4.

▶ Unscrew the blanking cap [1].

▶ Attach the hose [2] to the valve.

– Usually one end of the hose is already connected to one of the

system fill isolation valves.

▶ Ensure both ends [3] of the hose are screwed on hand tight.

– The system fill isolation valves [4] are in a closed position (the

handle/screwdriver slot is across the valve).

▶ Turn the handle/screwdriver slot through 90° to open valves and

slowly fill the system to between 1 and 1.5bar.

– The system fill isolation valves [5] are opened (the handle/

screwdriver slot is in-line with the valve).

– The needle on the pressure gauge will start to rise.

▶ Turn the handles/screwdriver slots back, through 90°, to close the

valves.

– The system fill isolation valves [6] are in a closed position (the

handle/screwdriver slot is across the valve).

▶ Top up the system pressure, if as a result of the air bleeding the

pressure drops off.

▶ Remove the hose [2] and replace the blanking cap [1].

Fig. 4 External filling loop

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 needle on the pressure gauge will start to rise.

▶ To stop the filling process, release the lever [1] when:

– The pressure, shown on the pressure gauge, reaches between the

1 and 1.5 bar [2].

▶ Top up the system pressure, if as a result of the air bleeding, the

pressure drops off.

Fig. 5 Keyless filling link

If the pressure gauge reads more than 1.5 bar as a result of over filling:

▶ Bleed one radiator until the pressure gauge returns to between 1 and

1.5 bar.

▶ It is good practice to bleed any excess air that has entered the heating

system due to re-pressurisation. Locate a radiator valve and bleed the

air, closing the valve when water begins to flow.

▶ If, through normal boiler operation, the PRV pipe starts to leak, it

could be a sign of system pressure being too high. In this instance

please bleed a radiator as described above.

0010015034-001

Min

1 bar

1.5 bar

Max

0010015050-001

Min

1 bar

1.5 bar

Max

I had a Worcester Greenstar 24i boiler replaced. The installers fitted a replacement boiler Worcester Greenstar 2000 GR2300iW C. The output heat is 20KW.
I need advice is this boiler as I think a lower output heat than my old one. Submitted on 20-10-2021 at 00:18
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Worcester-Bosch Greenstar 2000 - GR2300iW C Manual

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