Initial start-up
2
28
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
Buderus • http://www.buderus-domestic.co.uk
Subject to modifications resulting from technical improvements!
z
If the gas/air ratio does not conform to specifications,
readjust at the setscrew (fig. 37, item 1).
z
Turn mains power switch and chimney-sweep switch to “
0
”.
z
Remove the measuring equipment and retighten the screw
in the burner-pressure measuring nipple.
z
Readjust the hot-water temperature controller to its original
setting.
z
Turn the mains power switch to “
I
”.
2.1.13 Gas rating test
z
Isolate all other appliances.
z
Set the boiler to maximum firing rate.
z
Ensure that there is no modulating of the fan gas valve.
z
Carry out the Gas Rating procedure as described in
"Essential Gas Safety' 3rd edition on pages 169-176.
2.1.14 Record readings
z
Unscrew the corresponding sealing closure (fig. 38) on the
connection adapter for the combustion-air/flue-gas system
and replace it once the measuring operation in question
has been carried out.
Carbon monoxide content
2.1.15 Function testing
Measuring the ionisation current (fig. 39)
z
Disconnect the system from the power supply.
z
Loosen the plug-and-socket connector of the ionisation
electrode and connect the multimeter in series.
On the measuring device, select the µ-direct current range.
The measuring device must have a resolution of at
least 1 µA.
z
Reconnect the system to the power supply and turn the
chimney-sweep switch to “
1
”.
z
Measuring the ionisation current. The ionisation current
being checked must measure >2 µA direct current.
z
Enter the reading on the report form.
z
Disconnect the system from the power supply.
Fig. 38 Measuring points on exhaust conduit
Key to Fig. 38:
1:
Exhaust-fume temperature, CO
2
, CO, NO
x
2:
Combustion-air temperature
1
2
CAUTION
The carbon monoxide values under vacuum
must be smaller than 400 ppm or 0.04 Vol%.
Values around or exceeding 400 ppm indicate
a faulty burner adjustment, a dirty gas burner
or heat exchanger, or a defective burner.
Ensure that the cause of the fault is remedied
immediately.
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.
Fig. 39 Measuring the ionisation current