system
air
15
Caution
The foundation height for an outdoor unit should not be less than 500 mm.
Design the foundation so as to protect the unit or sections thereof against sliding or tipping over under wind loads. To
this end, carry out a check of wind forces.
Upon joining and interconnecting individual compact units, affix the roof elements onto the air handling unit top
according to the equipment design documents, and ensure that the joints are sealed against water. In the event the roof
elements have been affixed in the factory, mounting on site is not necessary; however, sealing the joints against water
is necessary in this case as well.
The joints between the intake and extract air ducting connections and the ducts must be watertight. In cases when the
intake air into and extract air out of the air handling unit run through ducts, the joints between the duct connections and
ducts must also be watertight.
For air handling units installed on the roof or at an elevation, provide safe access with a platform if necessary. The
platform in front of the unit service side or around the unit should be constructed so as to avoid the build-up of snow in
front of the intake air opening in winter, which might lead to excessive snow ingress into the unit.
The platform must ensure safe climbing to and descending from the unit and safe maintenance.
