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We reserve the right to make technical modifications
Buderus Ltd. • http://www.buderus-domestic.co.uk
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Servicing manual Gas condensing boiler Buderus 500-24/S, 500-24/C and 500-28/C • Issued 02/2006
box 55
z
Turn the operating switch on the boiler to position “
1
”
(ON, item 1).
box 56
z
Fill the heating system to a pressure of approximately
1.5 bar, then close the filling loop.
z
Vent all the air vent points in the heating system, working
from bottom to top, in order to allow all air in the heating
system to escape.
box 57
z
Loosen by two turns the vent screw (item 1) on the front of
the pump.
A
CAUTION!
Water will also squirt out!
1
1
box 58
z
Vent the pump.
A
CAUTION!
Correct venting of the pump will help ensure that it runs
for its specified service life.
The sliding bearing, which is located behind the vent
screw, is lubricated with heating system water.
z
Once the heating system has been completely purged of
air, check the pressure at the analogue pressure gauge.
If the pressure is lower than 1.0 bar, the boiler should be
topped up as described above.
z
Close the water tap.
In the case of system boilers:
z
Close the filling loop of the boiler, see box 50, item 2.
z
Remove the hose.
z
Fit the sealing cap to the filling and draining cock.
In the case of combination boilers:
z
Close the filling loop.
z
Remove the hose.
z
z
Configure target adjustments using the “Settings” menu
on the DBA control panel of the boiler, see box 61
box 59
Initial startup
z
Open the gas tap (item 2).
box 60
z
Put the boiler into operation, see box 53, 54 or 55.
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