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5.15
Potential at control voltage connections
The control voltage connections (< 50 V) relate to the joint GND potential (Exception: Relay contacts
are potential free). There is a potential separation between the control voltage connections and the
protective earth. It must be ensured that the maximum external voltage at the control voltage
connections cannot exceed 50 V (between
“
GND
”
terminals and
“
PE
”
protective earth). If necessary, a
connection to the protective earth potential can be established, install bridge between
“
GND
”
terminal
and the
“
PE
”
connection (terminal for screening).
6
Start-up
6.1
Prerequisites for commissioning
Attention!
•
During commissioning, unexpected and hazardous conditions can arise in the entire installation due
to defective adjustments, defective components or incorrect electrical connections. Remove all
persons and objects from the hazardous area.
•
Do not start the fan until all safety instructions (DIN EN 50110, IEC 364) have been checked, the fan
is out of range (DIN EN ISO 13857) and danger can be ruled out.
Before
fi
rst-time start-up, check the following:
1. Installation and electrical connection have been properly completed?
2. Has any leftover installation material and other foreign material been removed from the fan area?
3. That safety devices -if necessary- are mounted (EN ISO 13857)?
4. The impeller is out of reach?
5. Are the condensation water drains holes (as far as available) open or respectively closed
according to the suitable installation position?
6. Connection data complies with the speci
fi
cations on the rating plate?
During start-up check the following:
1. Check the direction of rotation (
rotation direction arrow on the fan blade, impeller base plate or
support plates on suction side or rating plate).
2. Check for quiet, low vibration operation. Strong vibrations due to erratic operation (unbalanced),
e.g. caused by transportation damage or improper use, can lead to failure.
3. A-rated sound power levels of over 80 dB(A) are possible, see product catalogue.
4. If resonance vibrations occur, it is possible to hide certain speed ranges (
Motor Setup or Add-
on module).
5. Fans from ZIEHL-ABEGG SE are delivered balanced in accordance with ISO 1940-1 for the
appropriate fan category in accordance with ISO 14694. Check the fan for mechanical vibrations
after installation. If the limit values of the corresponding fan category are exceeded in start-up,
you must have the motor/impeller unit checked by an expert and rebalanced if necessary before
continuous operation is permitted.
Assembly instructions
ECblue
Start-up
L-BAL-F055D-GB 1634 Index 002
Part.-No.
24/51