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Worcester-Bosch Greenstar Ri Manual

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Prepare for operation
Greenstar Ri ErP + - 6 720 821 669 (2018/06)
3.3 Topping up the system pressure
External filling loop
Once the external filling loop and pressure gauge has been located, follow the instructions for re-pressurising the system.
▶ 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.
▶ Monitor the pressure gauge.
– 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.
– 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.
▶ Set the pressure between 1 and 1.5 bar pressure.
▶ 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).
If the pressure drops off, below 1 bar as a result of the air bleeding:
▶ Top up the system pressure.
Once the pressure has settled between 1 and 1.5 bar.
▶ Remove the hose [2] and replace the blanking cap [1].
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.
NOTICE: System fill method
Your installer should have informed you where to find the filling system and instructed you in its use.
▶ To comply with the Water Authority regulations you must disconnect the external filling loop after re-
pressurisation.
6720821669-02.1Wo
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Min
1 bar
1.5 bar
Max
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