Technical data

Function Tests Air Top 2000 ST
602
6.3 Settings
6.3.1 Setting CO
2
content
The CO
2
content in the emissions is set using the adjustment
knob on the control element. At a constant blower speed
the volume of fuel is controlled by changing the metering
pump cycle.
IMPORTANT
The CO
2
measuring instruments must be calibrated.
The heater must be switched off.
1. Connect the CO
2
line to minus.
2. Turn the adjustment knob on the control element to the
centre setting. The heater will start and go automatically
to low-fire rate mode.
NOTE
If the heater can be adjusted the operating indicator will
flash as if the control unit has suffered an error.
Diesel units:
3. Set the CO
2
value by turning the adjustment knob.
Turning it anticlockwise will reduce the CO
2
value,
whilst turning it clockwise will increase it. The measured
CO
2
content at partial load (1 kW) must be between
5.0 % and 8.0 %. At full load the CO
2
content is to be
10.3 +/- 0.5 vol. % after adjustment.
Petrol units:
3. The CO
2
content may only be adjusted with the unit at
operating temperature. The unit must be operated for
at least 8 minutes for this purpose. Then the CO
2
content must be set to 6.1 to -6.3 vol. % at partial load
(1 KW). At full load the CO
2
content is to be 9.9 +/- -
0.4 vol. % after adjustment.
Diesel and petrol units:
4. If the CO
2
value is in the permissible range, disconnect
the CO
2
line from minus. This saves the setting.
NOTE
The heater will now run in normal mode again and can be
switched off as normal using the control element.
The heater is set at the factory to match the fitted
combustion air blower.