Water pressure in the central heating system
Message ' Water pressure too low' on your RS100 thermostat.
On the display of the RS100 a low water pressure can be indicated. For further information see the relevant user manual.
The installation will function optimally with a water pressure of between 22 and 25 PSI.
If the water pressure drops below 14.5 PSI, the display will show FILL. During this message the boiler will remain functioning at a reduced level. After replenishing the system (see following chapter) just above 22 PSI the message FILL will disappear and the boiler will function normally again.
When the water pressure drops below 10 PSI, the display will show a flashing FILL text.
The boiler will shut down and will function normally again after replenishing the system to just above 22 PSI.
To retreive the water pressure on the display from the Good reading:
-Press the Step key once briefly.
The water pressure will be shown.
Press the Step key briefly to return to the Good reading.
Water pressure is too high (>52.2 PSI), if HIGH indication remains continuously visible, the boiler is taken out of operation. The installation pressure needs to be decreased by draining water until the pressure is between 22 and 25 PSI.
Operating instructions Rinnai
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