53
9.12 Chimney Sweep Function
For correct boiler operation, content of (CO2 - O2) in the combustion flue must be within tolerances indicated in
table below.
For correct boiler operation, content of (CO
2
- O
2
) in the
combustion flue must be within tolerances indicated in
table above.
Chimney Sweep Function enables boiler firing rate to be
controlled for diagnostic purposes.
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
or
to gradually adjust power
(increments of 1%).
C. To exit press both buttons
and
together for
at least 6 seconds.
D. 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. See Section 11 General Maintenance,
Figure 11-1 Electrodes
If problem persists, use "
COMBUSTION
ADJUSTMENT FUNCTION (CO
2
%
)".
If problem continues to persist,
follow directions in
Section 9.8 Automatic Calibration Function,
and Section 9.9 Manual Calibration Function.
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.
(*)
Automatically calculated from the PCB
9.13 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 shows a flame icon
and
alternately "
304
" and current firing power. Press
CH+
until
"304"
&
"100"
is displayed. It is now
possible to partially adjust CO2 value at 100%.
3.
If adjustment is needed Press
, display shows a
blinking flame icon
and alternately
"304"
and
"00"
.
4.
Press
to raise or lower the amount of
CO
2
(from -0.3% to +0.3%).
5.
Press
to save new value. Power value "
100
" will
show on display again. Boiler continues operating at
maximum DHW power.
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.
9 - START UP PROCEDURE
Combustion
Table
Gas A (Natural Gas)
Gas E (LPG)
MAHF-75 & 100
MACF-115 & 150
MAHF-125
MAHF-165
MACF-205
All
CO2 %
O2 %
CO2 %
O2 %
CO2 %
O2 %
CO2 %
O2 %
Maximum
power
(100%)
Nominal value
9.0
4.9
8.7
5.4
9.0
4.9
10.0
5.7
Permitted
value
8.5
–
9.5
4.0 - 5.7
8.2 – 9.3
4.3 – 6.3
8.5 – 9.5
4.0 – 5.7
9.5 – 10.5 4.9 – 6.4
Ignition
power (*)
Nominal value
8.7
5.4
8.7
5.4
8.7
5.4
10.8
4.8
Permitted
value
8.2 - 9.3
4.3 – 6.3
8.2 – 9.3
4.3 – 6.3
8.2 – 9.3
4.3 – 6.3 10.3 - 11.3 3.7 – 5.2
Minimum
power (0%)
Nominal value
8.8
5.2
8.8
5.2
9.0
4.9
9.8
6.0
Permitted
value
8.2 - 9.3
4.6 – 6.3
8.2 – 9.3
4.3 – 6.3
8.5 – 9.5
4.0 – 5.7
9.3 – 10.3 5.2 – 6.7
240013503 REV A, [03/15/2022]
Summary of Contents for UTICA BOILERS MACF-115
Page 2: ...MACF 150...
Page 4: ...MAHF 125...
Page 77: ...73 A 1 MODEL 75 100 Heat Only APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 78: ...74 A 2 MODEL 125 Heat Only APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 79: ...75 APPENDIX A WIRING DIAGRAMS A 3 MODEL 165 Heat Only 240013503 REV A 03 15 2022...
Page 80: ...76 APPENDIX A WIRING DIAGRAMS A 4 MODEL 115 Combi 240013503 REV A 03 15 2022...
Page 81: ...77 A 5 MODEL 150 Combi APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 82: ...78 A 6 MODEL 205 Combi APPENDIX A WIRING DIAGRAMS 240013503 REV A 03 15 2022...
Page 117: ...33 PN 240012875 REV D 03 15 2022 MODEL 75 100 HEAT ONLY 75 100 HEAT ONLY WIRING DIAGRAM...
Page 118: ...34 PN 240012875 REV D 03 15 2022 MODEL 125 HEAT ONLY 125 HEAT ONLY WIRING DIAGRAM...
Page 119: ...35 PN 240012875 REV D 03 15 2022 MODEL 165 HEAT ONLY 165 HEAT ONLY WIRING DIAGRAM...
Page 120: ...36 PN 240012875 REV D 03 15 2022 115 COMBI WIRING DIAGRAM MODEL 115 COMBI...
Page 121: ...37 PN 240012875 REV D 03 15 2022 MODEL 150 COMBI 150 COMBI WIRING DIAGRAM...
Page 122: ...38 PN 240012875 REV D 03 15 2022 MODEL 205 COMBI 205 COMBI WIRING DIAGRAM...
Page 128: ...44 PN 240012875 REV D 03 15 2022 LOW WATER CUTOFF LOW WATER CUTOFF DETAIL NO NO YES...
Page 133: ...49 PN 240012875 REV D 03 15 2022 3 FAULT SOLUTION SECTIONS...
