1611UDSBD-3GBEN, Pag. 8/36
6. Technical
data
The UDSBD-3 units are fi tted with a new type of Nicotra blower with EC motor.
The blower can be used on a variety of different speeds. The motor speed is
adjustable by use of a potentiometer (see table below ).
The units leaving the factory are set to the speed requested by the customer. The
curves shown in the fi gures 2a/2b, illlustrate for each unit which speeds can be
chosen in order to get another air duty.
Table 4 : Technical data
1) Gas Appliance Classifi cations for Approved Venting Methods based on CEN-report CR1749:2001.
2) There is a difference between the gas connection diameter and the diameter of the supply line. Always use the most adequate diameter of the
supply line to minimize the pressure drop through the gas pipes - if necessary, reduce the diameter of the supply line at the inlet of the unit.
3) Figure for discharge louvre zero defl ection.
4) Height from fl oor to bottom surface of heater. These are recommendations only. Positioning of unit heaters for proper performance is application
dependent. Operation is affected by other air moving equipment in the space, obstructions to the airfl ow, draughts and/or close proximity to
doors or windows, etc ... Care should be taken to avoid mounting the heaters above these recommendations, unless downturn nozzle options
are used, as signifi cant stratifi cation may occur resulting in poor fl oor coverage and higher energy losses through the roof structure.
5) Isothermal cond/-20°C ambient air temperature, discharge louvres zero defl ection, v = 0,5m/s. The air throw will be infl uenced by the
height of the building, mounting height of the unit, ambient temperature & adjustment of the louvres.
6) Sound pressure level in dB(A) in free fi eld conditions, measured at 5 meters from the unit, free outlet
7) Sound pressure level in dB(A), measured at 5 meters from the unit with A=160m² & Q=2, free outlet
Type
UDSBD
015-3
020-3
025-3
030-3
Gas category
II2H3+
Comb. air & fl ue, type B (1)
B22
Comb. air & fl ue, type C (1)
C12, C32, C42, C52, C62, C82
Dia fl ue outlet/combustion air inlet
mm
80
80
100
100
Heat input Hs
kW
17,6
22
30,8
35,2
Heat input Hi
kW
15,9
19,8
27,8
31,7
Heat output
kW
14,6
18,2
25,5
29,2
Th
ermal effi
ciency
%
92
92
92
92
Gas consumption
natural gas G20 m³/h
1,68
2,1
2,94
3,36
propane G31
kg/h
1,24
1,55
2,16
2,47
Gas pipe connection (2)
1/2”
Temperature rise (3)
K
20
23
27
25
Airfl ow (3)
m³/h
2150
2350
2750
3360
Recommended mounting height (4)
m
3,5
4
4,5
4,5
Horizontal throw (5)
m
18
23
26
26
Sound pressure (6)
dB(A)
50
52
47
51
Sound pressure (7)
dB(A)
57
58
54
58
Electrical service (protection IP20)
230/240V 1N ~50Hz
Max. total electrical rating
W
496
496
1662
1662
Weight (net)
kg
50
53
71
74
