27
3.2.6.3. Ø 80 mm air/flue gas split duct system
The above data are referred to air intake/flue gas exhaust systems which are implemented by means of smooth, rigid
manufacturer approved and supplied pipes.
Installation types C43 - C53 - C83
KC 24, KR 24 and KRB 24 - KC 28, KR 28 and KRB 28 - KC 32, KR 32 and KRB 32
Minimum permissible length of air intake pipe is 1 meter.
Minimum permissible length of flue gas discharge pipe is 1 meter.
Maximum permissible length of air intake/flue gas discharge pipes is 120 meters (combined length of air intake and flue gas discharge pipe length).
For each additional 1 meter of straight pipe maximum permissible length is to be reduced by 1 meter.
For each additional 90° elbow, maximum permissible length is to be reduced by 1.5 meter.
For each additional 45° elbow, maximum permissible length is to be reduced by 1 meter.
The roof terminal reduces maximum permissible length by 1.5 meters.
The wall terminal reduces maximum permissible length by 1 meter.
325
450
750
229,5
139,5
Ø 80
148
148
3.2.7.
Testing combustion efficiency
3.2.7.1. “Chimney sweep” function
The boiler is equipped with “chimney sweep” function, to be used when
testing combustion efficiency, and in order to adjust the burner.
To activate this function, it is necessary to open the front section of the
casing for access to the controls. Proceed as follows:
• Unscrew two of the four screws securing the casing – either those on
the left or those on the right.
• Open the casing.
• Remove the control panel mask by pulling the hooks on either side
outwards and pulling the mask towards you (fig. 17).
The control panel is represented in fig. 18.
When no.
2
selector (fig. 1) is positioned to WINTER, and rooom
thermostat (if available) to ON, while the boiler is operating, press
“chimney sweep” button
(fig. 18) for some seconds; the boiler turns
off and resumes the ignition sequence again to the fixed heat output
corresponding to setting of max heating output adjuster
max
(fig.
18), which allows for adjustment of maximum CH output.
“Chimney sweep” function operates for 15 minutes.
In order to exit the “chimney sweep” function, set no.
2
selector to any
position other than WINTER.
fig. 16
fig. 17
fig. 15
Sealing
cap
Gasket
Gasket
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