Wolf COB - CO Check;Adjustment Via Pump Pressure

52
3062547_201802
33 CO
2
check/adjustmentviapump
pressure
CO
2
settingsvia
pumppressure
If no control accessory is connected to the appliance or the CO
2
set value is
notachievedbymatchingthepipelengths,theCO
2
settingismadeviapump
pressurecontrol:
- Remove front and top casing.
- Pivot the control unit downwards.
- Insert the oil pressure gauge into the pump's pressure gauge test port.
- Remove the cap from the r.h. "ue gas" test port.
- Insert the test probe of the CO
2
measuring instrument into the "ue gas" test port (approx.
70 mm).
- Turn the heating water temperature selector to "Emissions test"
.
(illuminated signal ring as status indicator ashes yellow.)
- Measure the CO
2
content and compare it against the values given in the stage 2
table below.
- If required, amend the CO
2
content with the pressure regulating screw stage 2 with
a 4 mm Allen key (Danfoss design) or SW 8 open-ended spanner (Suntec design).
 Turnclockwise-higherCO
2
value
 Turnanti-clockwise-lowerCO
2
value
- Check whether the pump pressure is still within the tolerance range.
If not, then check the nozzle and mixer head.
- Terminate the emissions test mode by turning the DHW temperature selector back to
its original position.
AdjustingtheCO
2
valueinthe
upperloadrange(stage2)
(emissionstestmode)
Vacuum
measurement
connection
Vacuum
measurement
connection
Oil pressure
test connection
Oil pressure
test connection
Pressure regulating
screw, stage 2
Pressure regulating
screw, stage 2
Danfoss oil pump
Suntec oil pump
AdjusttheCO
2
valueinthe
lowerload(stage1)
- Press the reset button.
- Set the heating water temperature selector to 8.
- Approx. 2 min. after the burner starts, measure the CO
2
content with the CO
2
test
equipment and compare it against the values given in the stage 1 table below.
- If required, amend the CO
2
content with the pressure regulating screw stage 1 with
a 4 mm Allen key (Danfoss design) or SW 8 open-ended spanner (Suntec design).
Take this measurement within 4 s. of the burner start. If necessary, repeat the start
phase for setting procedures by turning back the heating water temperature selector
and pressing the reset button.
 Turnclockwise-higherCO
2
value
 Turnanti-clockwise-lowerCO
2
value
Appliance open COB-15 COB-20 COB-29 COB-40
Set CO
2
value
Stage 2 12,7 ± 0,3%
Stage 1 12,7 ± 0,3%
O
2
set value
Stage 2 3,8 ± 0,4%
Stage 1 3,8 ± 0,4%
Appliance open COB-15 COB-20 COB-29 COB-40
Stage 2 Pump pressure 12.0 ± 2.5 bar 16.8 ± 2.5 bar 16.8 ± 2.5 bar 23.5 ± 2.5 bar
Stage 1 Pump pressure 5.0 ± 1.0 bar 8.5 ± 1.0 bar 8.5 ± 1.0 bar 11.0 ± 1.0 bar
Thepumppressureinstage2mustalwaysbegreaterthanthatinstage
1topreventdamagetotheoilpump.
- Check whether the pump pressure is still within the tolerance range. If not, then check
the oil nozzle and mixer head.
- Terminate boiler operation by turning the heating water temperature selector back to
its original position.
- Remove the oil pressure gauge and close the aperture again.
Note
Pressure
regulating
screw
Stage 1
Pressure
regulating
screw
Stage 1
Danfoss oil pump
Suntec oil pump