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Commissioning
Measuring the standing gas-supply pressure
Take the boiler out of service by pressing the mains switch
(fig. 49, item 1) to "0".
Close the gas shut off valve (fig. 50, item 1).
Set the pressure gauge to "0".
Attach a tube from the pressure gauge to the gas test
nipple (the lower one, see fig. 51, item 2).
Slowly open the gas shut off valve (fig. 50, item 2).
Measure the standing gas-supply pressure.
Measuring the working pressure
Take the boiler out of service by pressing the mains switch
(fig. 49, item 1) to "0".
Close the gas shut off valve (fig. 50, item 1).
Set the pressure gauge to "0".
Attach a tube from the pressure gauge to the gas test
nipple (the lower one, see fig. 51, item 2).
Slowly open the gas shut off valve (fig. 50, item 2).
Open at least two radiators.
Set the mains switch (fig. 49, item 1) to "1".
Create a heat demand by pressing the service button "A"
(fig. 49, item 2), until an open-end spanner "
the top left hand corner of the display.
Measure the working gas-supply pressure.
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 Propane "P"
Pull off the tube from the gas testing nipple.
Tighten the screw of the gas testing nipple.
ATTENTION
If the required connection pressure is incorrect,
contact your gas supplier.
Ensure that all disturbed joints and connections are checked
for gas tightness on completion of tasks.
Subject to modifications resulting from technical improvements!
36
F
" appears in
Installation and maintenance instructions for Buderus 500 - 24/C and 500 - 28/C • 02/2005
1
2
fig. 49 DBA front
1
fig. 50 Gas valve
item 1:
Gas valve closed
item 2:
Gas valve open
fig. 51 Measuring the gas-supply pressure
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
drain
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