44
9.10 Chimney Sweep Function (CO
2
Adjust)
For correct boiler operation, content of (CO
2
- O
2
) in the combustion flue must be within tolerances indicated in table below.
COMBUSTION TABLE
Gas A
(Natural Gas)
DCB-125
Gas A
(Natural Gas)
DCC- 150
Gas A
(Natural Gas)
DCB-165
Gas A
(Natural Gas)
DCC-205
Gas E (LPG)
CO2 %
O2 %
CO2 %
O2 %
CO2 %
O2 %
CO2 %
O2 %
CO2 %
O2 %
Maximum
power (100%)
Nominal value
8.7
5.4
9.0
4.9
9.0
4.9
9.0
4.9
10.0
6.0
Permitted value 8.2 – 9.3 6.3 – 4.3
8.5 – 9.5 5.7 – 4.0 8.7 – 9.3 5.4 – 4.3 8.7 – 9.3
5.4 – 4.3
9.5 – 10.5 6.8 – 5.2
Ignition power
(*)
Nominal value
8.7
5.4
8.7
5.4
8.7
5.4
8.7
5.4
10.8
4.8
Permitted value 8.2 – 9.3 6.3 – 4.3
8.2 – 9.3 6.3 – 4.3 8.2 – 9.3 6.3 – 4.3 8.2 – 9.3
6.3 – 4.3 10.3 – 11.3 5.5 – 4.1
Minimum
power (0%)
Nominal value
8.8
5.2
8.8
5.2
9.0
4.9
9.0
4.9
10.0
6.0
Permitted value 8.2 – 9.3 6.3 – 4.3
8.2 – 9.3 6.3 – 4.3 8.7 – 9.3 5.4 – 4.3 8.7 – 9.3
5.4 – 4.3
9.5 – 10.5 6.8 – 5.2
Chimney Sweep Function enables boiler to generate maximum
heating power.
After activation, boiler power % can be adjusted from
minimum (0%) to maximum (100%) in DHW mode.
A. Press and hold
and
at the same time for 6
seconds. When the function is enabled, displays shows
“
On
” for few seconds followed by program row “
303
”
alternating with % of boiler power.
B. Press
to gradually adjust power (increments of
1%).
C. To exit press both buttons together for at least 6
seconds.
If value of
CO
2
-O
2
is different, check the electrodes and their
relative distances. See Figure 11-1.
If necessary, replace electrodes and position them correctly.
If problem persists, use "
COMBUSTION ADJUSTMENT
FUNCTION (CO
2
%
)". See Section 11 General Maintenance,
Figure 11-1 Electrodes.
NOTICE
• Press
to display instantaneous flow temperature for
15 seconds.
• Use a regularly calibrated combustion analyzer for
combustion analysis.
• During normal operation boiler performs combustion
control cycles. In this phase CO values higher than 400
ppm can occur for brief periods of time.
9 - START UP PROCEDURE
(*)
Automatically calculated from the PCB
9.12 Check Firing Rate
1.
Measure input, if a gas meter is installed in the system.
• Turn off gas to all other appliances.
• Activate some heating zones to dissipate heat.
•
Set boiler on high fire using Chimney Sweep Function.
• Use ½, 1 or 2 cu ft dial on gas meter. Measure time
required for two or more complete revolutions. Measure
time
for one or more minutes.
• Calculate input.
9.11 Combustion Adjustment Function (CO
2
%)
This function sets out to partially adjust the value of CO
2
%.
Use the following procedure:
1.
Press buttons
and
together for at least 6 seconds.
When the function is enabled, displays shows “
On
” for a
few seconds followed by program row “
304
” alternated
with the % of boiler power;
2.
After burner is lit, boiler reverts to maximum DHW power
(100). When display shows "
100
" it is possible to partially
adjust value of CO
2
%;
3.
Press
and
. Display shows "
00
" alternating with
function number "
304
" (
flashes);
4.
Press
to raise or lower the amount of
CO
2
(from -3 to +3);
5.
Press
to save new value. Power value "
100
" will show
on display again. Boiler continues operating at maximum
DHW power.
This procedure can be used to adjust
CO
2
to ignition power
and minimum power by pressing
after performing step
5 above.
6.
After saving the new value (step 5 above), press
to set boiler to ignition power. Wait for value of
CO
2
to stabilize. Adjust as described in step 4 of procedure
(power value is a number <> 100 and <> 0). Repeat step
5 to save.
7.
Press
to adjust boiler to
minimum power
. Wait for
value of
CO
2
to stabilize. Go to step 4 to adjust (power
value = 00);
8.
Exit function by pressing
and
together for at least
6 seconds, see step 1.
240011947 REV B, [03/31/2018]
Summary of Contents for DCB-125
Page 2: ...DCC 205 ...
Page 4: ...DCB 165 ...
Page 65: ...61 APPENDIX A WIRING DIAGRAMS A 1 MODELS 125 Heat Only 240011947 REV B 03 31 2018 ...
Page 66: ...62 APPENDIX A WIRING DIAGRAMS A 2 MODELS 165 Heat Only 240011947 REV B 03 31 2018 ...
Page 67: ...63 APPENDIX A WIRING DIAGRAMS A 3 MODELS 150 Combi 240011947 REV B 03 31 2018 ...
Page 68: ...64 APPENDIX A WIRING DIAGRAMS A 4 MODELS 205 Combi 240011947 REV B 03 31 2018 ...
Page 69: ...65 NOTES 240011947 REV B 03 31 2018 ...
Page 70: ...66 NOTES 240011947 REV B 03 31 2018 ...
Page 81: ...9 125 WITH ZONE CIRCULATOR PUMPS 125 with Zone Circulator Pumps PN 240011430 REV G 03 31 18 ...
Page 84: ...12 125 WITH ZONE VALVES PIPING DIAGRAM 125 with Zone Valves PN 240011430 REV G 03 31 18 ...
Page 90: ...18 165 with Zone Valves 165 WITH ZONE VALVES PIPING DIAGRAM PN 240011430 REV G 03 31 18 ...
Page 94: ...22 150 205 WITH ZONE PUMPS WIRING DIAGRAM 150 205 With Zone Pumps PN 240011430 REV G 03 31 18 ...
Page 102: ...30 MODEL 125 Heat Only 125 HEAT ONLY WIRING DIAGRAM PN 240011430 REV G 03 31 18 ...
Page 103: ...31 MODEL 165 Heat Only 165 HEAT ONLY WIRING DIAGRAM PN 240011430 REV G 03 31 18 ...
Page 104: ...32 MODEL 150 Combi 150 COMBI WIRING DIAGRAM PN 240011430 REV G 03 31 18 ...
Page 105: ...33 MODEL 205 Combi 205 COMBI WIRING DIAGRAM PN 240011430 REV G 03 31 18 ...
Page 110: ...38 Low Water Cutoff Detail LOW WATER CUTOFF NO NO YES PN 240011430 REV G 03 31 18 ...
Page 111: ...39 NOTES PN 240011430 REV G 03 31 18 ...
Page 112: ......
Page 115: ......
Page 116: ......
