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Worcester-Bosch Greenstar 1000 - GR1000W Manual

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Prepare for operation
Greenstar 1000 – 6721835944 (2023/08)
6
3 Prepare for operation
3.1 Sealed heating system
Appliances that can be connected to sealed heating systems are pre-
pressurised before operation, this pressure must be maintained for safe
use of the appliance.
▶ Check regularly that the pressure is maintained.
▶ Re-charge the system if the pressure indicator reads less than 0.8
bar.
▶ If a permanent significant decrease or increase in pressure is shown
on the pressure indicator, contact your installer or maintenance
engineer.
Pressure indicator
▶ Type of pressure indicator for the system pressure.
– Pressure gauge (an analogue dial showing the pressure)
– Pressure menu (a digital readout of the pressure)
▶ Your appliance may have one or both types of methods to indicate the
system pressure. The type of method used on this appliance will be
detailed in the following section.
3.1.1 Checking the system pressure
Your installer will advise you of the optimum operating pressure.
▶ Check the system pressure via HMI screen.
▶ Press the return button or ? or ? to see the system pressure.
▶ Adjust the system pressure between 1.3 and 1.7 bar.
▶ Press the return button for the main display.
3.1.2 Low pressure indication
Low pressure will be indicated on the appliance (LOPR):
▶ Adjust system pressure according to chapter 3.1.1, page 6.
3.1.3 Constantly re-pressurising the system
Constantly having to re-pressurise the heating system should be
investigated as it is an indicator of potential leaks and the concentration
of inhibitor protection in the system will be reduced; this can result in
corrosion within the heating system, reducing efficiency and increasing
contaminates.
▶ Check for leaks on heating system (pipework and radiator valves).
▶ Contact your installer or maintenance engineer if a recurring
significant decrease or increase in pressure is shown on the pressure
indicator (pressure gauge or pressure display).
System pressure increasing:
▶ If the system pressure repeatedly increases and you need to vent air
from the radiators, refer to section 3.2 "System Gassing", page 7.
… 6 …


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