Fig. 22: Cover strip coding
7.
NOTICE!
Risk of water damage from incorrect
assembly!
If units with an intermediate frame are installed
outdoors, missing cover strips or incorrect
assembly may lead to the ingress of water.
To prevent the ingress of water into the inter-
mediate frame and hence into the unit, seal the
intermediate frame with cover strips.
Fix the cover strips immediately after the
assembly steps described above.
Each cover strip carries a code indicating its posi-
tion (see table).
No. of the
inter-
mediate
frame
Side code
Number
(left
→
right)
01 ... 99
V
Front = oper-
ating side
1.1 ... 9.1
H
Rear
L
Left
R
Right
Fig. 23: Fixing cover strips
1
Cover strip for the intermediate frame
2
Thread forming pan head screws M6 x 12
(M852AC6)
3
Intermediate frame
8.
Use pan head screws to attach the cover strips to
the intermediate frame.
ð
This will prevent water from getting into out-
door units with an intermediate frame.
4.4.4 Connecting the ductwork
WARNING!
Risk of explosion!
Due to normal leakage, an explosive atmosphere
may escape from the inside of an AHU to the sur-
rounding area (zonal dispersion). All of the following
requirements have to be met to prevent an explosive
atmosphere in the vicinity of the AHU:
–
Leave a gap of at least 2 m between the outlet
(exhaust air opening) and the intake (outdoor air
opening). In addition, the openings should be
facing a direction where they are not affected by
wind or local emissions.
–
Supply air ducts to rooms where there are poten-
tially explosive atmospheres require shut-off
dampers to EN 1775, class C 3, on the supply air
and extract air openings. Ensure that the
dampers close if the power fails (power off to
close).
Failure to comply with these safety notes may lead to
an explosion.
Setup and assembly
Setting up and assembling the air handling unit > Connecting the ductwork
Air handling unit X-CUBE Ex
31
