26
325
450
750
376
305
Ø 80
148
135
fig. 14
fig. 15
3.2.6.3. Ø 80 mm air intake /flue gas discharge split duct system
The above data are referred to air intake/flue gas discharge systems which are implemented by means of smooth, rigid
manufacturer approved and supplied pipes.
Installation types C43 - C53 - C83
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.
Sealing cap
Gasket
Gasket
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. 16).
The control panel is represented in fig. 17.
When no. 2 selector (fig. 1) is positioned to WINTER, and room thermostat (if available) to ON, while the boiler is operating, press “chimney
sweep” button (
fig. 17) 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
(fig. 17), 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.
