Nova Florida DELFIS Monothermal - Checking Combustion Efficiency; Connection to Gas Mains

28
Instructions for the installer
3.6 Checking combustion eciency
3.6.1 Flue cleaning function
• The boiler features a ue cleaning function which must be used to measure combustion eciency during operation and to adjust the
burner.
• To activate the ue cleaning function, press and hold the buttons “Info” and “Reset” simultaneously for 5 seconds. The ow temperature and
the
symbol are shown on the LCD.
• When the ue cleaning function is activated with the boiler in WINTER or SUMMER mode, the boiler performs the ignition sequence and
then operates at a xed power output predetermined by the parameter P7 (maximum CH output).
• To exit the ue cleaning mode, press “Reset” or wait 15 minutes.
3.6.2 Measurement procedure
In order to verify combustion eciency the following measurements must be implemented:
• assess combustion air from the boiler installation room;
• assess ue gas temperature and CO2 from the special sampling port passing through the ue gas venting duct.
If sampling port is not present, it must be provided by the boiler operation and maintenance manager in compliance with the prevailing
regulations and standards.
Sampling port must be equipped with a special sealing and must be correctly closed after each reading.
Allow boiler to reach working temperature before taking any measurement.
3.7 Connection to gas mains
Cross-section gas pipe size must be chosen depending on its length, layout pattern, gas ow rate.
Gas supply pipe cross-section must be equal or greater than boiler gas pipe.
DANGER
Comply with installation standards enforced in the country where the boiler is installed which are considered as fully transcribed
in this booklet.
Remember that before operating an indoor gas distribution system and before connecting it to a meter, it must be checked for
leaks.
If some system parts are not visible, the leak test is to be carried out before the pipes are covered.
Leak test is NOT to be carried out employing ammable gas: use air or nitrogen for this purpose.
Once gas is in the pipes, leak test by a naked ame is forbidden; use specic products available on the market.
When connecting the boiler to gas supply network, it is COMPULSORY to install an appropriately sized gasket (A) made from
suitable material (see Fig. 8 Connection to gas mains).
The boiler gas inlet coupling is NOT suitable for hemp, teon tape or similarly made gaskets.
A
Fig. 8 Connection to gas mains