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2. TECHNICAL CHARACTERISTICS AND DIMENSIONS
2.1 Technical characteristics
The boiler is equipped with a high output cast iron heat exchanger
and atmospheric gas burners.
All versions are equipped with electronic ignition, ionization flame
detection device, AQUA PREMIUM system for DHW supply em-
ploying a 60 ltrs stainless steel stratification water tank and a plate
secondary heat exchanger.
The following versions are available:
BTN E 25: open chamber, natural draught boiler with 25.1 kW heat
output;
BTN E 32: open chamber, natural draught boiler with 31.4 kW heat
output;
BTN E 42: open chamber, natural draught boiler with 42.5 kW heat
output.
BTFS E 24: sealed chamber, forced draught boiler with 24.0 kW
heat output;
BTFS E 32: sealed chamber, forced draught boiler with 32.0 kW
heat output;
BTFS E 36: sealed chamber, forced draught boiler with 36.5 kW
heat output.
All models are available in V version, equipped with collector, mixing
valve and two additional pumps for management of one high tem-
perature zone and one low temperature zone.
In addition, the boiler is manufactured in accordance to laws and
standards in force in the country named on the boiler technical
data plate.
Installation in a different country from the one mentioned might
endanger people, animals and cause damage to property.
The main technical characteristics of the boiler are listed below:
Manufacture characteristics
- High-output cast iron heat exchanger
- Stainless steel plate DHW heat exchanger
- Stainless steel horizontal stratification 60 l water tank with
sacrificial magnesium anode
- Glass wool, aluminium layered, high thickness (50mm) insulation
- Plastic layered, metal sheet casing
- Gas valve
- Motorized deviating valve
- Three-speed CH circulation pump
- Single-speed DHW circulation pump
- 12 lt. CH expansion vessel (18 lt. for BTN E 42 model)
- 5 lt. DHW expansion vessel
- CH water, water tank and plate heat exchanger temperature
probes
- Adjustable by-pass
- CH system air purging device
- DHW priority flow switch
- Safety limit thermostat (110°C)
- Air pressure switch (BTFS model)
- Flue gas thermostat (BTN)
- DHW filter
- CH system loading tap
- CH system unloading tap
- Insufficient water pressure safety switch
- Electronics ready to host an additional pcb for management
of three different CH zones (optional kit).
User interface
- Selector managing the following functions: PROGRAMMER,
COMFORT TEMPERATURE, REDUCED TEMPERATURE,
ANTI-FROST,SUMMER
- CH water temperature adjusting knob
- DHW water temperature adjusting knob
- Power switch with light
- Led thermometer
- Pressure gauge
- Control panel with lights indicating:
• Power supply
• CH water supply
• Communication to remote control error
• Flame detecting device shutdown
• Overheating shutdown
• Low water pressure shutdown
• Temperature probe malfunction shutdown
• Air inlet/flue gas system malfunction shutdown.
2.2. Dimensions
pic. 5A
Model BTN E
G: Gas inlet
C: DHW flow
F: Cold water inlet
M: CH flow
R: CH return
D: Flue gas outlet
(130 mm for BTN 25,
150 mm for BTN 32 and BTN 42)
