Dantherm DanX 2/4 XKS, Инструкция по установке, пусконаладке и обслуживанию

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4. COMMISSIONING
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4.2 Centrifugal fan
To commission the centrifugal fans for the first time, the following actions have to be taken:
•
Check if the transportation brackets have been removed.
•
Check by hand if the fan wheel is turning freely.
•
Check that all dampers in the duct system are open.
•
Check if the duct system is clean and not blocked by any parts
•
Start up the fan for a few seconds and check if the fan wheel turns in the right
direction (see arrow on fan casing). If this is not the case stop the unit, switch off the
main current and change two phases of the fan on the terminal strip.
•
Close all inspection doors start up the fans and measure the running current of the
motors. If the running current is higher than specified on the type plate of the motors
stop the unit and check the air volume.
4.2.1 Air volume measurement and setting
If your centrifugal fan is equipped with a measuring probe (accessory), installed at the spider
arm of the fan, the air volume can be measured the following way:
In the electrical connection panel of the fan section you will find two measuring probes (+/-).
The differential pressure you can measure at these two points will show you indirectly the air
volume which is moved by the fan. To calculated the air volume from the found pressure
loose you have to use the following formulas:
DanX 2/4 to DanX 7/14:
where p is the measured pressure difference and k and N from the table below.
Model K N
DanX 2/4 0,063837 0,546547
DanX 3/6 0,083982 0,523426
DanX 5/10 0,132280 0,558588
DanX 7/14 0,208982 0,501027
DanX 9/18 to DanX 16/32:
where p is the measured pressure difference and k from the table below.
Model K
DanX 9/18
634
DanX 12/24 875
DanX 16/32 1091
3600 * * k V
p
N
=
Pw k V
D =
*