ENGLISH
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NT_51897201_RHE-AN_130516.docx
5. AIR DUCT CONNECTION
Ducts connection
5.1
Connecting ducting to be correctly aligned self supporting.
Make sure that the motor driven fans are not accessible from the connection taps. (Protection by the
connection duct or a screened air intake).
Do not reduce the diameter of the ducts at the oulet of the connection taps.
On the other hand, the diameter can be increased to reduce the passage speeds in the network, limit the
pressure drops and the sound level.
Depending on the installation’s configuration and the required sound level, a silencer may have to be
added at the discharge as well as at the supply.
Exercise the greatest care to ensure tightness over the entire lengths of the networks from inlets to
outlets.
In circular operation, use preferably accessories with joints (at least class C according to EN12237).
Fresh air and discharge ducts must always be isolated to avoid losses and risks of condensation. The
isolation level particularly in cold regions and parts must be reinforced.
In all cases, respect at least the regulations in force.
Respect a minimum distance of 8 m between the fresh air intake and the discharge. Place the fresh air
intake far from any specific pollution.
Accessories connection
5.2
Dampers
Electric connection on the RHE box: see subsection “External components connetion drawings”
When the unit is equipped with a water coil it is recommended to provide for an antifreeze protection
damper on the fresh air network. If possible, use a motorized airtight damper.
A second damper should be mounted on the extraction network to isolate the unit.
S&P Code Designation
Duct diameter
(mm)
5416762600 REEV
250
250
5416786700 REEV
315
315
5416762700 REEV
355
355
5416762800 REEV
400
400
5416786800 REEV
450
450
S&P Code Designation
Description
5416762900
LF 230 S
On/Off Spring return actuator 4Nm 230V/ Auxiliary switch
