Buderus 500-24S Installation And Maintenance Instructions Manual page 41

V Remove the tube from from the burner-pressure testing
nipple.
V Tighten the screw on the burner-pressure testing nip-
ple ( fig. 58, item 1).
V Open the gas shut off valve (
V Turn the mains power switch to "1" (
Caution:
Check the test nipples for gas tightness.
NOTE
Technically it is not necessary to use a com-
bustion analyzer for CO
The CO level is secured by the gas/air ratio
2
as described above.
A combustion analyzer, if available, can be
used to confirm CO
specifications on page 6).
2.1.7 Gas rating test
V Isolate all other appliances.
V Press the service button
load.
V Ensure that there is no modulating of the fan gas valve.
V Carry out the Gas Rating procedure as described in
"Essential Gas Safety" 3rd edition on pages 169-176.
2.1.8 Checking for leaks while boiler is in opera-
tion
V Use an approved leak detector to check all connec-
tions for possible leaks. The product must be certified
as a gas leak testing agent.
V Do not allow the product to come into contact with the
electrical wiring.
2.1.9 Function testing
NOTE
During initial start-up and annual servicing,
make sure that all control, regulating and
safety devices are in full working order and, if
applicable, check for correct adjustment.
Measuring the ionisation current (
V Turn the mains power switch to "0" (
V Loosen the connector-and-socket connection of the
ionisation electrode and connect the multimeter in
series.
Buderus 500-24S - Subject to modifications resulting from technical improvements
fig. 56, item 2).
fig. 55, item 1).
measurements.
2
levels ( technical
2
to set the boiler to full
fig 62)
fig. 55, item 1).
Fig. 61 Adjust gas/air ratio
2
Commissioning
7215 3100-62.1TD
41