5
Technical features and dimensions
fig. 1
1.2 - DIMENSIONS
M
C.H. system flow
C
D.H.W. outlet
G
Gas inlet
F
D.C.W. inlet
R
C.H. system return
view from above
view from below
450
86
3
373
19
0
105
120
120
105
21
8
143
163
,5
15
4
M
C
G
F
R
1
TECHNICAL FEATURES
ET DIMENSIONS
- Heating output adjustment independent
from the D.H.W. output
- Flame modulation according to the
absorbed output.
- Pump in operation also during the D.H.W.
drawings.
- Boiler with protection degree
IP X4D
- Luminous indications of: D.H.W. demand -
Heating demand - Power ON - Fault
indication - Burner On - Thermometer.
- D.H.W. priority flow switch.
- Pressure switch against lack of water.
- Boiler manometer.
- Boiler filling cock.
- D.H.W. flow limiter at 12 l/min.
- Automatic air vent onto the circulating
pump
- Boiler temperature adjuster (35 to 85 °C)
- D.H.W. temperature adjuster(40 to 55 °C)
- Motorised diverting valve
- Safety thermostat
- Anti-frost protection
- Winter/Summer/Antifrost selector
- Mounting jig for preparation of hydraulic
connections.
- Electronic ignition.
- Casing with oven dried powder painting
1.1 -
TECHNICAL
FEATURES
The
DUA plus 30 µtank
boiler is a gas fired
unit operating with a built-in atmospheric
burner with electronic ignition; it is supplied
only in room sealed forced draught version
and with electrically operated diverting valve.
It is foreseen for heating and domestic hot
water production purposes.
The nominal output of
DUA plus 30 µtank
is
29,4 kW
, both in heating and D.H.W.
production mode.
The
DUA plus 30 µtank
is complete with all
the safety and control devices foreseen by
the Standards and, for its caracteristics,
is considered a low temperature boiler.
The electronic P.C.B. of the boiler adjustes,
through a continuous modulation of the gas
valve, the burner capacity according to the
actual heat demande.
COMPONENTS DESCRIPTION
- Dual (bithermic) copper heat exchanger.
- Micro-tank with 4 liters capacity of boiler
water.
This control P.C.B. guarantees the priority of
the domestic hot water production on to the
heating fonction and shows the heating flow
and domestic hot water temperatures.
The air suction and the smokes evacuation
are done through a coaxial duct, whose
length can vary.
This type of boiler shall be destined only to
the use for which it has been conceived.
IMPORTANT
The
DUA plus 30 µ tank
boiler is foreseen
for heating the water to a temperature lower
than the boiling temperature at the
atmospheric pressure. It must be connected
to a C.H. closed expansion system and to a
D.H.W. distribution system compatible with
its output and its technical performances.
