Commissioning
2
36
Installation and maintenance instructions for Buderus 500 - 24/S • 08/2006
Buderus • http://www.buderus-domestic.co.uk
Subject to modifications resulting from technical improvements!
Measuring the standing gas-supply pressure
z
Take the boiler out of service by pressing the mains switch
(fig. 51, item 1) to "
0
".
z
Close the gas shut off valve (fig. 52, item 1).
z
Set the pressure gauge to "
0
".
z
Attach a tube from the pressure gauge to the gas test
nipple (the lower one, see fig. 53, item 2).
z
Slowly open the gas shut off valve (fig. 52, item 2).
z
Measure the standing gas-supply pressure.
Measuring the working pressure
z
Take the boiler out of service by pressing the mains switch
(fig. 51, item 1) to "
0
".
z
Close the gas shut off valve (fig. 52, item 1).
z
Set the pressure gauge to "
0
".
z
Attach a tube from the pressure gauge to the gas test
nipple (the lower one, see fig. 53, item 2).
z
Slowly open the gas shut off valve (fig. 52, item 2).
z
Open at least two radiators.
z
Set the mains switch (fig. 51, item 1) to "
1
".
Create a heat demand by pressing the service button "
A
"
(fig. 51, item 2), until an open-end spanner "
F
" appears
in the top left hand corner of the display.
z
Measure the working gas-supply pressure.
z
The working gas-supply pressure should be between:
a minimum of 17 mbar and a maximum of 25 mbar
(nominal connection pressure of 20 mbar) for Natural gas.
a minimum of 30 mbar and a maximum 50 mbar
(nominal connection pressure 37 mbar for LPG.
z
Pull off the tube from the gas testing nipple.
z
Tighten the screw of the gas testing nipple.
NOTE
The difference between the standing and
working pressure may never be greater than
5 mbar. If the difference between the two is
greater than 5 mbar then the pressure loss in
the gas pipe is too great.
fig. 51 DBA front
1
2
fig. 52 Gas valve
item 1:
Gas valve closed
item 2:
Gas valve open
1
2
Drain
ATTENTION
If the required connection pressure is incorrect
contact your gas supplier.
