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6.5 Exhaust dimensioning
It is important that the machine has correct air volume compared to each machines power.
If the air flow is smaller or larger this will result in a longer drying period.
If the outlet pipe is long or the ventilation is not properly designed we recommend to clean the outlet pipes periodi-
cally. Usually, longer ducts need more frequent cleaning.
The exhaust pipes shall be short in order for the machine to work in the best way.
All cover panels must be mounted in order for the machine to work in the best way.
6.6 Adjusting the dryer (not valid for machines with heat pump)
It is important that the machine has the correct air flow compared to each machines heat input. If the air flow is below
the minimum, the machine will be forced to switch the heating off which will result in longer drying time.
An air flow above the needed is unnecessary and can result in a cold laundry room and noise from the piping and out-
let and in extreme cases prolonged drying time
For brief evacuations and where there are high airflows, the tumble dryer must be adjusted to optimal flow. One
way in which this can be done is by using an "Iris valve", a valve specially designed to regulate airflow.
Effect
kW
6.0
8.0
Air volume
The curves shows the characteristics of the dryer. By measuring or calculating the back pressure of the outlet pipe it
is hereby possible to find the corresponding air flow into the room and through the dryer and exhaust.
A = Optimum air volume
B = Working area
Y
800
700
600
500
400
300
200
100
0
0
25
50
75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450
Installation manual
Optimum air volume
m
3
/h
270
290
Y
6.0 kW
800
700
600
500
A
400
300
B
200
100
X
Corresponding back pressure
Pa
380
350
0
0
25
50
75 100 125 150 175 200 225 250 275 300 325 350 375 400 425 450
8.0 kW
A
B
X
fig.7533
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