Ceiling installation
RLT Flat air handling units are suitable for ceiling installation. M10 threaded rods are attached at the following positions according to the table below:
RLT Flat | Ceiling installation / [Ø/number] |
M4004H | M10 / 4 pcs. |
M4007H | M10 / 4 pcs. |
M4012H | M10 / 4 pcs. |
M4020H | M10 / 4 pcs. |
M4027H | M10 / 8 pcs. |
External modules | M10 / 4 pcs. |
No. | Components |
1 | Threaded rod (M 10) |
2 | Nut |
3 | Washer |
4 | Vibration isolator |
5 | Second nut |
Suitable measures such as structure-borne sound decoupling elements for M10 threaded rods must be provided for structure-borne sound decoupling.
If an external module is present, check the labels on both the device and the additional module. Determine the position at which the external module is to be connected.

An EPDM seal 5x15 should be applied to the flange where the connection is to be made to the device.
Take the external module and position it correctly according to the specified labels. Suspend the external module using M10 threaded rods.

The flange with the applied seal and the flange of the external module are connected with M10x20 screws.
After connecting, make sure that the device is correctly leveled.
If there are 2 external modules next to each other
- Remove the suspension brackets between the 2 modules.
- Fit the following suspension bracket.