20
| Installation
Air gap AXC/AXR/AXS/AXCP/AXCPV cont'd
1250
+/– 2mm
1242 mm 1234 mm 1223 mm
1400
+/– 2mm
1386 mm 1383 mm 1370 mm
1600
+/– 3mm
1583 mm 1581 mm 1567 mm
7.10 Installation jet fans AJR, AJ8 and IV
Always install in a horizontal position.
7.10.1 Air gap
Ensure that the air gap between the housing and the impeller is complied with.
♦ Check if the air gap complies with the table.
♦ Do not install the fan if the gap in the table below is not complied with.
♦ Contact Systemair.
Table 17 Air gap
AJR/AJ8 (Standard temperature) AJR/AJ8
(K) + (B)
AJR/AJ8 (F)
Nominal
width
Housing tolerance Impeller Ø Impeller
Ø
Impeller Ø
315
+/– 1 mm
312 mm 310 mm 306 mm
355
+/– 1 mm
352 mm 350 mm 346 mm
400
+/– 1 mm
397 mm 395 mm 391 mm
7.10.2 Deflector
For optimal guidance of the air current, a deflector made of galvanized steel sheet can be mounted on the pressure-
side silencer (accessory).
The deflector as accessory for AJR/AJ8 is delivered in a separate package.
♦ Before installing the jet fan, fasten the deflector on the silencer of the pressure side (see arrow).
♦ Position the deflector fins so that after fastening the jet fan to the ceiling, the air flow is directed downwards at a
10° angle. It may be possible to readjust the fans afterwards depending on the structures located in the immediate
vicinity, such as girders.
AJ8
AJR
IV
Position the fins to the specified
angle and secure them with 4.2 x 13
self-drilling screws. Use M4 x 12
self- locking screws to fasten the
deflector to the fan.
Fasten the deflector with an M6 x 40
screw, an M6 nut and a Ø6 serrated
washer.
Position the fins to specified angle
and secure them with 4.2 x 13 self-
drilling screws.
| 004
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