Table of Contents
Advertisement
> 1 <= 4 Lamp
> 4 <= 8 Lamp
> 8 <= 12 Lamp
The lamps are mounted and supplied with one side connected and one side with loose cables, suffi-
cient in length to be routed to the nearest junction box or the next switch.
The AHU will be delivered in parts, and for this reason the lights have to be connected on site and the
client is responsible for the completion of this work.
If the AHU will have lights fitted on site make sure that sections with condensate (cooling sections)
and wet sections are equipped with lights with appropriate protection of at least IP55. Switches or
junction boxes mounted on the outside of rooftop AHUs must also have at least protection class IP55.
For AHUs with integrated control and lighting, an additional power supply for the lighting must be
provided and separated from the power supply for the control cabinet. This ensures that the light also
can be switched on during repair work, despite the main switch being switched off (prerequisite for
access to the AHU).
8
Commissioning
8.1
Preliminary steps
Clean thoroughly the AHU and all components of dust, swarf and other debris.
-
-
Remove all loose parts like tools, etc. and any documentation from the AHU. Such parts can be
sucked in by the fan and lead to its destruction.
-
check all bolt connections and electrical connections and retighten if necessary
Ensure that the duct pressure corresponds to the pressure for the nominal air flow and the pres-
-
sure specified in the technical data sheet.
Ensure that all planned filters are mounted. Not mounted filters can overload the fan motor.
-
All cables must be checked for damage to the insulation and replaced if necessary.
-
Here are some important points to consider, which could cause problems after transport or inappro-
priate AHU handling.
Rotate the impeller of the fan by hand, to check whether it rotates freely.
-
Check the motor connection and the matching of the supply voltage at the rated voltage - a fluc-
-
tuation of supply voltage between + -5% is permitted.
8.1.1
Airflow measurement by differential pressure measurement at the fan
The delivered airflow rate can be calculated or displayed from the measured differential pressure. A
so-called K-value and an associated formula are used for calculation or for input into display or con-
trol devices.
Usually, two different formulas and thus two different K-values are in use:
48/115
1 switch, 1 junction box
1 switch, 2 junction box
1 switch, 3 junction box
V07-19.0
Advertisement
Table of Contents
