Technical features and dimensions
5
1
- EMC Directive 89/336/EEC dated 3 May
1989 amended by Directive 92/31/EEC
dated 28 April 1992;
- European Community’s Low Voltage
Directive 73/23/EEC dated 19 February
1973 amended by Directive 93/68/EEC
dated 22 July 1993;
The main technical features of the DUA
plus B boilers are summarised below:
· 60 litre enamelled upright storage tank
with a helical steel heat exchanger;
· Monothermal, copper, high performance
heat exchanger;
· Adjustment of maximum output in heating
mode;
· Adjustment of the flame modulation as a
function of the absorbed power;
· NTC sensor for D.H.W. priority;
· Safety pressure switch for low water
level;
· System water inlet tap;
· Storage tank exhaust tap;
· Circulation pump with automatic air vent;
· Filling tank pump with automatic air vent;
· High limit thermostat (105°C);
· Anti-freeze protection;
· 7,5 litre expansion vessel;
· 4 litre sanitary expansion vessel
(optional);
· Automatic differential by-pass;
· Control panel with IP X4D insulation
protection;
· Led indication of: D.H.W. demand, C.H.
demand, voltage presence, burner in
operation, temperature scale, faults,
chimney sweeper mode;
· Manometer;
· Tap water flow rate restrictor set at 12
litres/min;
· Unlocking of check valves;
· C.H. temperature selector (35 - 85°C);
· D.H.W. temperature selector (35 - 65°C);
· Main selector Winter / Summer /
Antifreeze / Only Heating;
· Minimum outer temperature calibration (if
an outer sensor is connected);
· Mounting frame with valves for easy
hydraulic connections (optional);
· Electronic ignition with double electrode;
· Casing painted with epoxypoliester
pouders;
· Flue gas antispillage thermostat (natural
draught open chamber version);
· Heating exhaust tap.
1.1 - TECHNICAL
FEATURES
DUA plus is a wall hung gas boiler with
built-in atmospheric gas burner for heating
and D.H.W. production; it is available in the
following versions:
DUA plus BTN 28 with natural draught
open chamber
DUA plus BTFS 28 with forced draught
room sealed
combustion
chamber
All versions have electronic ignition.
DUA plus B boilers are supplied with all
control and safety features according to the
latest laws in force, and comply with the
fundamental requirements of the following
EEC directives:
The BEA boilers comply with the
fundamental
requirements of the following EEC
directives:
- Directive Gas 90/396/EEC dated 29 June
1990;
- Yield Directive 92/42 EEC dated 21 May
1992;
fig. 1
182
167
600
870
475
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