Buderus Logano GE515 Operating Instructions Manual page 14

7 System maintenance
Systems are generally differentiated as open or sealed
systems. Open systems are now only rarely installed.
Therefore, a sealed system is used as an example of
how you can check the water pressure.
The specialist will have carried out all initial settings
during commissioning.
7.2.2 Open systems
On open systems (if fitted) the pressure gauge needle
(Fig. 4, item 1) must be within the red range (Fig. 4,
item 3).
7.2.3 Sealed systems
On sealed systems the pressure gauge needle (Fig. 5,
item 2) must be within the green range (Fig. 5, item 3).
Set the red needle (Fig. 5, item 1) on the pressure
gauge to the required system pressure.
 Check the system water pressure.
SYSTEM DAMAGE
through frequent re-filling.
CAUTION!
The system may be damaged, depending
on water quality, by corrosion or scaling, if
you frequently need to re-fill your system
with make-up water.
 Ensure that your heating system is fully
vented.
 Check the heating system for leaks and
correct function of the expansion
vessel.
 The water pressure in the system is too low, if the
pressure gauge needle falls below (Fig. 5, item 2)
the green range (Fig. 5, item 3). Re-fill the heating
system with make-up water (see chapter 3 "Using
correct fill and make-up water", page 7).
 Fill make-up water through the fill cock in the heating
system pipework (return).
 Vent the heating system.
 Re-check the water pressure.
14 Operating instructions Oil- and gas-fired special boilers Logano GE515 • Issue 2018/01
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Fig. 4 Pressure gauge for open systems
1
Pressure gauge needle
2
Green needle
3
Red marking
2
1
Fig. 5 Pressure gauge for sealed systems
1
Red needle
2
Pressure gauge needle
3
Green marking
We reserve the right to make any changes due to technical modifications.
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