DPG
a
Installation – Commissioning – Maintenance
20150101
Installation
Size of opening, see the dimension print. Place the
mounting frame in the opening and secure it with screws
to the building structure. Rotate the diffuser face to
engage it in the mounting frame. See Figure 2.
Commissioning
Swegon recommends that the space behind the air diffuser
be used as a pressure chamber. Equip the connecting duct
to the relevant pressure chamber with a type CRM meas-
urement and commissioning damper. If the air diffuser is
used as an ALS commissioning damper, adjust the airflow
by placing the manometer measuring tube directly against
the centre hole in the diffuser face. See Figure 2.
Measurement accuracy and requirement on straight duct
before the commisioning box, see Figure 2. The require-
ments of straigh duct depends on the type of disturbance
before the commissioning box. Figure 2 shows a bend, a
dimensional change and a T-piece. Other types of dis-
turbances requires at least 2xD straight (D = connection
dimension) for measurement accuracy of ± 10% of the
flow.
Maintenance
The air diffuser can be cleaned, if necessary, using luke-
warm water with dishwashing detergent added or by
vacuum cleaning using a brush nozzle. See Figure 2.
Figure 2. Installation, Commissioning, Maintenance
Figur 1. DPG Installation principle.
k
p
q
k
p
q
⋅
=
k
p
q
=
( )
2
q
= flow reading l/s
p
= current pressure reading (Pa)
k
= commissioning factor
k-factor
0xD / ±5%
0xD / ±5%
2xD / ±10%
