Accessories
Commissioning box:
ALS. The ALS commissioning box is made of galvanized sheet steel
and contains a removable commissioning damper, fixed measurement
tapping and sound absorbing material*
)
with reinforced surface layer.
The ALS commissioning box is available with one or two differences in
dimension between the inlet and the outlet and also a version for low
installation where a low overall height is required. The ALS commission-
ing box is then supplied without outlet branch.
*
)
Fire resistance rated to B-s1,d0 in accordance with EN ISO 11925-2.
Installation
Cut the opening in the false ceiling according to the dimension print
and the table with measurements. Place a mounting frame on top of
the false ceiling and unfold it to form a square frame around the open-
ing. Secure the frame with screws from the underside. Tighten the
screws through the false ceiling slab, into the perforation on the long
sides of the frame. If a flexible tube is used as the connecting duct,
connect it at this phase of the work, and fasten it to the air diffuser
with a hose clamp. Place the diffuser backing box in the opening with
four angle brackets firmly against the false ceiling. Tighten the screws
through the angle brackets and into the false ceiling slab and into the
perforation of the mounting frame. Fasten the diffuser face in the
safety chain and press it into its spring mounts.
If an ALS commissioning box is used, the sleeve coupling between the
ALS and the air diffuser can be lengthened using an ordinary circular
duct of up to 500 mm without having to lengthen the measuring
tubes and damper adjustment cords. See Figure 1.
Commissioning
Commissioning should be carried out with the diffuser face mounted.
Pull out the measuring tubes and damper adjustment cords through
the diffuser face perforations. Connect a manometer to the measuring
tube. The desired commissioning pressure can be computed by apply-
ing the rated coefficient of performance of the air diffuser. Set the
damper to the correct blade position, tie a commissioning knot in the
damper cords to indicate the damper position.
Measurement accuracy and requirement on straight duct before the
commisioning box, see Figure 1. The requirements of straigh duct
depends on the type of disturbance before the commissioning box.
Figure 1 shows a bend, a dimensional change and a T-piece. Other
types of disturbances requires at least 2xD straight (D = connection
dimension) for measurement accuracy of ± 10% of the flow.
The K-factor (COP) is specified on the product’s identification label.
K-factors can also be found in the relevant commissioning instructions
at www.swegon.com.
Maintenance
The air diffuser can be cleaned, if necessary, using lukewarm water
with dishwashing detergent added. The duct system can be reached
by dismantling the diffuser face. Pull the distributor plate in the ALS
commissioning box aside and then twist the damper unit from of its
mounting. See Figure 1.
Figure 1. Installation. Commissioning.
0xD / ±5%
0xD / ±5%
2xD / ±10%
LPA
a
Installation – Commissioning – Maintenance
20150101
