Fläkt Woods
8666 GB 2010.06
Specifications are subject to alteration without notice
Installation and maintenance instructions
Control equipment
7
Connecting the service power supply for lighting
All of the air handling unit’s incoming power supplies
must be preceded by a load interrupter in accordance
with Machinery Directive 2006/42/EC. Load inter
-
rupters are available as accessories STAZ-80.
In eQ units with integrated controls there are two
options for providing service power for air handling
unit lighting.
1.
For power supplies up to 5.5 kW, a service power
supply can be obtained by connecting L3 to L3’
through a terminal block on the power unit in the
control cabinet. This means that the entire air handling
unit is turned off from all power when it is disconnec-
ted through the all pole load interrupter. See Fig. 5.
2.
Separate power supply. This means that the air hand-
ling unit still has a service power supply when the all
pole load interrupter is disconnected. See Figs. 4 and 6.
Options 1 and 2 apply if the project’s mains
voltage is 3x400 VAC. If the project’s voltage is
3x230 VAC, connect in accordance with point 2.
In order to achieve service power that takes account
of personal safety in point 2, when the air handling
unit load interrupter is off, the service power must be
supplied from the same group and provided with
a 10 AT double-pole fuse group, and a ground fault
interrupter in series. See Figs. 4 and 6.
If the load interrupter is switched off, service power is
supplied through the residual current circuit breaker,
and when the load interrupter is on, the ground fault
interrupter is bypassed via the load interrupter auxi-
liary contacts.
The service power supply must be connected in ac
-
cordance with the enclosed wiring diagram. When
disconnecting the load interrupter, switch off the
double-pole automatic fuse first, and when the load
has been disconnected the double-pole automatic fuse
can be switched on again. The reverse procedure app
-
lies when switching on the load interrupter.
L2 L3
L1
10AT
L2 L3
L1
PE
PE
16AT
32AT
10AT
16AT
32AT
L2
L1
L1
L1
PE
NO
NO
Styrskåp
Matning
Lastfrånskiljare
L2 L3
L1
V W
U
N
L3
´
N
M
M
L3
N
1
4
2
3
1. STAZ-80, load interrupter
2. eQ Air handling unit
3. Energy analyser/terminal block
4. Ground fault interrupter with automatic personal protection fuses
Power supply
Load
interrupter
Fig. 4
3x400 VAC TN-S
Separate service power supply via personal protection.
Electrical
cabinet
Summary of Contents for eq Controls
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