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9 .1 2 Chim ney Sw eep Funct ion
For correct boiler operation, content of (CO2 - O2) in the combustion flue must be within tolerances indicated in
t able below.
Com bust ion
Table
Maxim um
Nom inal value
power
Perm it t ed
( 100% )
value
Nom inal value
I gnit ion
Perm it t ed
power ( * )
value
Nom inal value
Minim um
Perm it t ed
power ( 0% )
value
( * )
Aut om at ically calculat ed from t he PCB
For correct boiler operat ion, cont ent of ( CO
combustion flue must be within tolerances indicated in
t able above.
Chimney Sweep Function enables boiler firing rate to be
cont rolled for diagnost ic purposes.
A. Press and hold
seconds. When t he funct ion is enabled, displays
shows " On " for few seconds followed by program
row " 3 0 3 " alt ernat ing wit h % of boiler power.
B. Press
or
t o gradually adj ust power
( increm ent s of 1% ) .
C. To exit press bot h but t ons
at least 6 seconds.
D. I f value of CO
- O
2
2
and t heir relat ive dist ances. See Figure 11- 1.
I f necessary, replace elect rodes and posit ion t hem
correct ly. See Sect ion 11 General Maint enance,
Figure 11- 1 Elect rodes
I f problem persist s, use "COM BUSTI ON
AD JUSTM EN T FUN CTI ON ( CO
I f problem cont inues t o persist , follow direct ions in
Se ct ion 9 .8 Au t om a t ic Ca libr a t ion Fu n ct ion ,
a n d Se ct ion 9 .9 M a n u a l Ca libr a t ion Fu n ct ion .
NOTICE
to display instantaneous flow
• Press
t em perat ure for 15 seconds.
• Use a regularly calibrat ed com bust ion analyzer
for com bust ion analysis.
• During norm al operat ion boiler perform s
com bust ion cont rol cycles. I n t his phase CO
values higher t han 400 ppm can occur for brief
periods of t im e.
9 - START U P PROCED U RE
M AH F- 7 5 & 1 0 0
M ACF- 1 1 5 & 1 5 0
CO2 %
O2 %
9.0
4.9
8.5
9.5
4.0 - 5.7
–
8.7
5.4
8.2 - 9.3
4.3 – 6.3
8.8
5.2
8.2 - 9.3
4.6 – 6.3
- O
2
2
and
at t he sam e t im e for 6
and
t oget her for
is different, check the electrodes
% ) " .
2
Ga s A ( N a t u r a l Ga s)
M AH F- 1 2 5
CO2 %
O2 %
8.7
5.4
8.2 – 9.3
4.3 – 6.3
8.7
5.4
8.2 – 9.3
4.3 – 6.3
8.8
5.2
8.2 – 9.3
4.3 – 6.3
) in t he
9 .1 3 Com bust ion Adj ust m ent Funct ion ( CO
This funct ion set s out t o part ially adj ust t he value of
CO
% . Use t he following procedure:
2
1.
Press but t ons
seconds. When t he funct ion is enabled, displays
shows " On " for a few seconds followed by program
row " 3 0 4 " alt ernat ed wit h t he % of boiler power;
After burner is lit, boiler shows a flame icon
2.
alt ernat ely " 3 0 4 " and current firing power. Press
CH + unt il " 3 0 4 " & " 1 0 0 " is displayed. I t is now
possible t o part ially adj ust CO2 value at 100% .
3.
I f adj ust m ent is needed Press
blinking flame icon
" 0 0 " .
4.
Press
( from - 0.3% t o + 0.3% ) .
5.
Press
show on display again. Boiler cont inues operat ing at
m axim um DHW power.
6.
Aft er saving t he new value ( st ep 5 above) , press
t o set boiler t o ignit ion power. Wait for value
of CO
procedure ( power value is a num ber < > 100 and
< > 0) . Repeat st ep 5 t o save.
7.
Press
for value of CO
( power value = 00) ;
8.
Exit funct ion by pressing
least 6 seconds, see st ep 1.
5 3
M AH F- 1 6 5
M ACF- 2 0 5
CO2 %
O2 %
9.0
4.9
8.5 – 9.5
4.0 – 5.7
8.7
5.4
8.2 – 9.3
4.3 – 6.3
9.0
4.9
8.5 – 9.5
4.0 – 5.7
and
t oget her for at least 6
and alt ernat ely " 3 0 4 " and
t o raise or lower t he am ount of CO
t o save new value. Power value " 1 0 0 " will
t o st abilize. Adj ust as described in st ep 4 of
2
t o adj ust boiler t o m in im u m pow e r . Wait
t o st abilize. Go t o st ep 4 t o adj ust
2
240013503 REV A, [ 03/ 15/ 2022]
Ga s E ( LPG)
All
CO2 %
O2 %
10.0
5.7
9.5 – 10.5
4.9 – 6.4
10.8
4.8
10.3 - 11.3
3.7 – 5.2
9.8
6.0
9.3 – 10.3
5.2 – 6.7
% )
2
and
, display shows a
2
and
t oget her for at
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