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10. Mounting preparations
3
5. Connect connection duct [15], suitable for
the ER GH housing, to the main duct and
seal for ventilation.
6. Cut connection duct [15] to length, note a
maximum duct length of 6 m.
Cut connection duct to a length
which allows it to be fitted on the
exhaust socket and also sealed for
ventilation at the unit end.
7. Lay suction duct [12] and seal gap remain-
ning correctly as described in previous
mounting instructions.
8. Lay power cable [16] in shaft and allow to
protrude by around 30 cm above the shaft
opening.
9. Lay power cable [16] in line with chapter
10.4.
14
10.3 Ceiling installation preparations
12 Suction duct for second room connection
on ER GH: flexible aluminium duct
AFR 75/AFR 80
14 Main duct: Steel folded spiral-seams duct
15 Connection duct on ER GH: flexible
aluminium duct AFR 75/AFR 80
16 Power cable
Be sure to note the approval and
mounting information in chapter 10.2.
Preparing the shaft and suspended ceiling
1. Produce an opening in the suspended
ceiling.
2. Produce opening for
Ø 75 or Ø 80 in shaft.
3. For a second room connection, produce
the opening in the wall or shaft for the
suction duct [12]. Note installation
positions for the second room connection.
[15]
connection duct
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