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We reserve the right to make any changes due to technical modifications.
Commissioning and maintenance instructions Logano GE434 Gas-fired special boiler • Issue 02/2003
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
Heating system inspection and maintenance
8
8.6
Checking and correcting the heating system water pressure
On sealed systems the pressure gauge needle (Fig. 23,
Item 2
) must be within the green field (Fig. 23,
).
Set the red needle (Fig. 23,
Item 1
) on the pressure
gauge to pressure required by your heating system.
!
Check the heating system water pressure.
The water pressure in your heating system is too low if
the pressure gauge needle (Fig. 23,
Item 2
) falls below
the green field (Fig. 23,
). Then re-fill the heating
system with top-up water.
!
Fill top-up water via the on-site boiler fill and drain
valve in the heating return.
!
Vent the heating system.
!
Check the water pressure once more.
Fig. 23
Pressure gauge for sealed heating systems
Item 1:
Red needle
Item 2:
Pressure gauge needle
Item 3:
Green field
3
1
2
PLEASE NOTE
!
Set the system pressure to at least
1 bar when the system is cold.
CAUTION!
SYSTEM DAMAGE
through frequent topping up.
The heating system may be damaged,
subject on water quality, by corrosion or
scaling, if you frequently need to top-up
your system with water.
!
Ensure that your heating system is
adequately vented.
!
Check the heating system for leaks and
the function of the expansion vessel.
CAUTION!
SYSTEM DAMAGE
through temperature stresses.
!
Only fill the system when cold (the flow
temperature should be a maximum of
40 °C).
PLEASE NOTE
Slowly fill in water in case you notice water
losses.
