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160/230/300/350/400
702
7.2.1 CO2 content adjustment
A modification of the factory-adjusted burner motor speed
and thus of the exhaust CO 2 content is permitted.
The burner motor speed can be adjusted using SST
diagnosis.
An exhaust measurement device (CO2 measurement
device) is necessary for the adjustment.
The exhaust CO2 content must be measured and the
combustion air volume may have to be adjusted:
t
after burner repairs.
t
in case of combustion irregularities.
t
in case of heavy sooting of the heat exchanger or
other components during a functional test.
t
after atomizer nozzle replacement.
t
if heater is mainly operated above 1500 m.
t
in case of modifications to the optional, application-
dependent combustion air intake and exhaust line.
The SST diagnosis sequence defines the CO2 content
adjustment procedure.
The motor speed must be adjusted to ensure the CO
2
content in the exhaust is set to 9.5 + 1.5 Vol-%.
Adjustment procedure
t
Switch heater on.
NOTE
The exhaust should not be measured directly at the exhaust
outlet of the heat exchanger, as this may cause inaccuracies.
Exhaust fumes should be sampled from the exhaust pipe
in a distance of 350 mm after the heat exchanger. The
exhaust fume temperature should be measured at the
same location.
Increased exhaust temperature may indicate a sooted
heat exchanger (see 5.5.2).
t
After a combustion period of approx. 3 min. measure
the CO 2 content in the exhaust and compare it to the
target value in Table 701.
t
Determine smoke number as needed: Target value
according to Bacharach: <4
t
Connect the SST diagnosis adapter to the heater and
a PC via the interface in the heater wiring harness.
Start SST diagnosis, establish connection to the
heater and open the Calibration menu.
t
Obtain the next steps from SST diagnosis. Adjust the
burner motor speed using SST diagnosis to achieve
the target value for the CO2 content.
A speed increase results in a reduction of the CO2
content and vice versa.
NOTE
An upper and lower speed limiting value is stored per
heating capacity class in the control unit.
This should prevent incorrect adjustments during
maintenance/service.
SST diagnosis displays the speed limiting values.
The CO 2 content depends on the fuel
(viscosity) and the height ab ove sea level (increase by
approx. 0.1 Vol-% per 100 m height increase).
In the case that the CO 2 content cannot be properly
adjusted, proceed as follows:
t
Verify that fuel pump and atomizer nozzle comply with
the heating capacity class.
t
Verify burner motor speed.
t
Inspect burner head on the air side for damage and
replace as needed.
t
Inspect fuel filter and fuel pump filter (screen) for
contamination and replace as needed.
t
Replace atomizer nozzle.
t
Check fuel pump pressure and replace fuel pump
as needed.
Table 701 CO
2
heater target values
Heater S160 S230
S300 S350
S400
CO
2
target
value
9.5 + 1.5 Vol.-%
Summary of Contents for Thermo S 160
Page 2: ......
Page 6: ...1 Introduction Thermo S 160 230 300 350 400 4...
Page 11: ...S o m r e h T n o i t c u d o r t n I 1 160 230 300 350 400 105...
Page 49: ...5 Troubleshooting and error correction Thermo S 160 230 300 350 400 520...
Page 55: ...r e h T s m a r g a i d c i t a m e h c S 6 mo S 160 230 300 350 400 606...
Page 71: ...9 Modifications and retrofits Thermo S 160 230 300 350 400 902...
Page 73: ...10 Packing storage shipping Thermo S 160 230 300 350 400 1002 Empty page for notes...
