5
Wiring
Safety instructions
DANGER!
Danger of electric shock! Do not touch any live com-
ponents! Electrical equipment carries a dangerous
electrical voltage.
–
Only skilled qualified electricians are allowed to
work on the electrical system.
–
Switch off the power supply before working on
any electrical equipment.
5.1 Installation instructions
The VAV terminal unit was manufactured and configured
on a project-specific basis. The control components are
factory-mounted and balanced. For installation, the
supply voltage and, if necessary, signal lines, must be
connected for electrical control components.
The connection is established based on the information
specified on the control components or connection dia-
grams in this manual. Project-specific wiring diagrams
must be observed. The voltage ranges and terminal
connections specified on the control components must
be observed!
Personnel:
Skilled qualified electrician
Observe the following during installation:
Legal and official regulations, in particular VDE
guidelines.
Consideration of the technical connection rules
(TCR) of the local network operators.
Wiring work for supply voltage and signal lines on
site.
The rating and manufacture of customer-side con-
nections and wiring must be carried out in accord-
ance with the recognised rules of electrical engi-
neering.
Observe wiring guidelines and project-specific circuit
diagrams of the control components.
The electrical connection to the terminal unit may
only be established if the installation has been car-
ried out correctly.
The 24 V supply voltage must only be supplied with
a safety transformer.
To protect against overload, the supply voltage for a
maximum of three Easy controllers may be through-
wired.
If multiple volume flow rate controllers are con-
nected to a 24 V network, it must be ensured that a
common neutral or ground line is defined and not
interchanged.
The control component contains no parts that can
be replaced or repaired by the user and may only be
opened by the manufacturer.
Remove the transparent protective cap of the Easy
controller only temporarily for wiring and commis-
sioning, not available for TVE.
For TVE type only: to ensure IP protection, use the
rubber cover to insert the connection cables.
Lay connecting cables in such a way that they
cannot be accidentally damaged by mechanical
impact or by heat.
Electrical safety
The control component complies with all relevant stand-
ards and guidelines, see declaration of conformity.
Open terminals
According to the electro-technical regulations, contact
protection insulation is only required for active parts.
Because Easy controllers are operated with protective
extra-low voltage (PELV), the screw terminals are not
considered active parts.
Wire clamping bracket
Devices that are permanently installed in buildings are
stationary electrical equipment for which no wire
clamping bracket on the connecting cables is pre-
scribed.
Some VAV terminal units come with a wire clamping
bracket (cable tie) that can be used to secure the con-
necting cable as part of electrical installation work.
5.2 Connection diagrams
Terminals
Fig. 13: Terminals
1
Ground
2
24 V AC / DC supply voltage
3
Setpoint value signal (w) 0 – 10 V DC
4
Actual signal (U) 0 – 10 V DC
The connection terminals for the supply voltage (1 and
2) are doubled for easy rewiring.
Caution:
to protect against overload, the supply voltage
for a maximum of three Easy controllers must be
through-wired.
Terminals for 0.5 to 2.5 mm² cables, rigid and flexible.
Wiring
Connection diagrams
Easy control component for VAV terminal units
18
