12
1.4. Maintenance
Routine boiler maintenance must be provided according to the applicable laws in the country of installation and following the instructions
given in the relevant section in this manual. Correct maintenance ensures that the boiler operates efficiently, is environmentally friendly, and
is not a danger to people, animals or property.
By law, only qualified personnel are allowed to service the boiler.
The Manufacturer recommends that Customers contact an authorized Service Centre for maintenance and repairs.
For maintenance interventions, refer to section 5 – Maintenance.
The external boiler housing must only be cleaned with standard household cleaning products.
Do not use water!
1.5. Notes for the user
The user may only access boiler parts that can be reached without using any technical equipment or tools. The user is not authorized
to remove the boiler housing or touch any of the internal parts.
No one, including qualified service engineers, is authorized to modify the boiler.
The manufacturer can not be held liable for damage to people, animals, or property due to tampering or improper work done to the boiler.
If the boiler remains inactive and the power supply disconnected for a long time, the pump may not operate.
Pump servicing includes removing the boiler housing and accessing the internal parts of the boiler, so this must only be done by a
qualified service engineer.
Pump blockage can be avoided by adding to the water filming additives suitable for multi-metal systems.
2. TECHNICAL CHARACTERISTICS AND DIMENSIONS
2.1. Technical characteristics
The boiler is equipped with an atmospheric burner. All versions are equipped with electronic ignition and ionization flame control.
The following models of boiler are available:
- CTN 24:
open chamber and natural draught, electronic ignition and instant DHW supply (23.31 kW)
- RTN 24:
open chamber and natural draught, electronic ignition, CH supply only (23.31 kW)
- CTFS 24:
sealed chamber and forced draught, electronic ignition and instant DHW supply (23.77 kW)
- RTFS 24:
sealed chamber and forced draught, electronic ignition, CH supply only (23.77 kW)
- CTFS 28:
sealed chamber and forced draught, electronic ignition and instant DHW supply (28.6 kW)
- RTFS 28:
sealed chamber and forced draught, electronic ignition, CH supply only (28.6 kW)
All models comply with the Directives issued in the country of destination indicated in the rating plate.
Installation in a country other than the specified one may be a source of danger for people, animals and property.
The main technical characteristics of the boiler are listed below:
Construction characteristics
- IPX4D electrically protected control panel
- Modulating electronic safety board
- Electronic ignition with external separate transformer and ionization flame detection
- Stainless steel multi-gas atmospheric burner
- Modulating gas valve with double shutter
- Mono-thermal, high performance, copper heat exchanger
- Stainless steel DHW heat exchanger (models CTN and CTFS)
- Motorized deviating valve (models CTN and CTFS)
- Three-speed circulation pump, equipped with a de-aerator
- Low water safety pressure switch
- 8-litre expansion vessel
- DHW priority flow switch (models CTN and CTFS)
- 10 litres/min DHW flow limiting device (models CTN and CTFS)
- Adjustable by-pass
- Boiler filling and draining taps
- CH (all models) and DHW (models CTN and CTFS) temperature probes
- Safety limit thermostat
- Flue thermostat (models TN)
- Flue pressure switch (models TFS)
