RT-SVX060A-GB
35
11UNT-PRC002-GB
Sound power levels
Discharge
Measurement conditions:
Measurements taken in a room adjacent to the room containing the FWD, at the outlet of the rectangular duct (1.5 m
long) fixed to its discharge opening.
Fan Power level in dB(A), per Hz frequency band Overall power
Unit speed 125 250 500 1000 2000 4000 8000 dB(A)
1 55 50 42 37 37 31 30 46
FWD 08 2 57 54 47 40 30 38 40 50
3 58 57 50 42 32 40 43 53
1 57 51 45 42 34 33 28 48
FWD 10 2 58 54 48 45 38 39 35 51
3 60 58 50 48 40 42 39 54
1 57 51 45 42 34 33 28 48
FWD 12 2 58 54 48 45 38 39 35 51
3 60 58 50 48 40 42 39 54
1 56 62 50 48 39 38 36 56
FWD 14 2 61 66 55 53 47 46 45 60
3 63 69 58 56 50 50 49 63
1 57 63 51 49 40 39 37 57
FWD 20 2 61 66 55 53 47 46 45 60
3 63 69 58 56 50 50 49 63
Intake
Measurement conditions:
Measurements taken at the horizontal air intake.
Fan Power level in dB(A), per Hz frequency band Overall power
Unit speed 125 250 500 1000 2000 4000 8000 dB(A)
1 56 55 55 53 46 45 42 57
FWD 08 2 63 62 60 60 53 53 53 64
3 66 65 63 62 56 55 57 67
1 62 58 55 58 51 48 44 61
FWD 10 2 66 63 60 62 56 55 52 66
3 70 67 63 65 59 59 57 69
1 62 58 55 58 51 48 44 61
FWD 12 2 66 63 60 62 56 55 52 66
3 70 67 63 65 59 59 57 69
1 66 65 65 65 57 50 46 68
FWD 14 2 73 72 69 71 64 59 57 74
3 78 76 73 75 69 64 63 78
1 68 72 64 64 56 52 50 69
FWD 20 2 76 76 68 71 65 61 61 75
3 78 79 71 74 69 66 66 78
Options
Exhaust Fans
The exhaust plug fans are used to minimize the
overpressure in the building caused by the introduction
of fresh air.
This option is typically used when the fresh air intake
needed is between 40 to 50% of the nominal air flow or
when the return air duct pressure drop is higher than
25Pa (<70Pa or 150Pa according to option selected).
This option includes hoods, gravity dampers and axial
fans.
Optional service Terminal allow to adjust exhaust fans
start and stop value according to fresh air damper
position.
When the supply air fan is ON, the exhaust fans turn on
whenever the position of the fresh air dampers meet or
exceed the exhaust fan set point. (If the potentiometer is
set at 40%, the exhaust fans will start when the fresh air
dampers will meet or exceed 40% opening).
Operation
• When the exhaust fans are OFF :
- The barometric dampers open when the air pressure
inside the building increases.
As the building pressure increases, the pressure in
the unit return section also increases, opening the
dampers and relieving the air.
- If return air pressure drop>building overpressure
(∆P>Pb – Patm) → barometric damper is closed.
- If return air pressure drop<building overpressure
(∆P< Pb – Patm) → barometric damper opens and
a maximum of 25% of the nominal airflow can be
exhausted.
• When the exhaust fans turn ON :
- Around 50% of airflow can be exhausted, depending
on the pressure drop in the return air duct.
- The two fans work always together, on stage ON-OFF.
- Each fan has two speeds, which makes 2 configurable
speeds by changing the wiring on site.
- The exhaust fan is started when fresh air dampers
meet or exceed a preset percentage of fresh air.
Configured for Return roofcurb (ESP=250 PA)
Figure 15 - Exhaust fan
To Next Page
Loading...
