Hoval RoofVent CON-9, Design Handbook

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6 High-pressure fan supply air
The high-pressure supply air fan is used to overcome
additional pressure drops, e.g. through a supply air duct.
It replaces the standard supply air fan. Please note the
following:
■ Unit size 6: An additional pressure drop always results
in a lower nominal air flow rate. Due to the steeper fan
characteristic curve, however, the decrease in air flow rate
is smaller than for the standard fan.
■ Unit size 9: At nominal air flow rate, an additional pressure
drop of 130 Pa is provided compared with the standard
design.
Note
An additional pressure drop of at least 130 Pa is
required for correct operation of unit size 9.
Technical data
The technical data differs from the standard design as
follows:
■ Fan characteristics (see Table K4)
■ Sound levels (see Table K5, Table K6)
■ Nominal air flow rate (see Diagram K1, Diagram K2)
■ Heat output, max. mounting height: The values applicable
for the respective operating point are available upon
request.
Type HZ-6 HZ-9
Supply voltage V AC 3 x 400 3 x 400
Permitted voltage tolerance % ± 10 ± 10
Frequency Hz 50 50
Active power per motor kW 2.2 3.5
Current consumption A 4.3 8.5
Set point of thermal relays A 4.9 9.8
Speed of rotation (nominal) rpm 2860 1455
Table K4: Fan characteristics for the high-pressure fan supply air
Unit type LHW/LKW-6 LHW/LKW-9
2)
Operating mode VE2 REC VE2 REC
Position
Sound pressure level (at a distance of 5 m)
1)
dB(A) 52 63 51 54 60 51
Total sound power level dB(A) 74 85 73 76 82 73
1)
with hemispherical radiation in a low-reflection environment
2)
outdoors (roof unit)
Table K5: Sound levels, RoofVent LHW/LKW with high-pressure fan supply air
Unit type LH/LK-6 LH/LK-9
Operating mode VE2 REC VE2 REC
Position
Sound pressure level (at a distance of 5 m)
1)
dB(A) 52 63 51 54 60 51
Total sound power level dB(A) 74 85 73 76 82 73
1)
with hemispherical radiation in a low-reflection environment
2)
outdoors (roof unit)
Table K6: Sound levels, RoofVent LH/LK with high-pressure fan supply air
Options
High-pressure fan supply air