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AIR HEATER WD-A, WD-U
08
Commissioning
8. Commissioning
08.01 Motor connection
Commissioning may only be carried out by qualified personnel. The qualified personnel are obliged to comply with the
general accident prevention regulations (e.g. UVV in Germany) and to wear the necessary personal protective equip-
ment.
Attention!
When commissioning the unit, the designed limits (see information on the type plate on the unit) must not be excee-
ded. No warranty is given for any consequential damage resulting from this.
In addition, the individual operating and maintenance instructions for the built-in parts or supplied parts must be observed.
The rated voltage specified on the type plate applies. Three-phase motors designed for a nominal voltage of 400 V can
be used in the range 400 V + 6 / - 10 % according to DIN / IEC 38, single-phase AC motors 230 V in the range 230 V
+ 6 / - 10 %.
Connecting cable made of EVA ethylene vinyl acetate hose cable 4 GJ1 according to VDE 0208 / 3.69. This cable is
approved for operating voltages up to 500 V, the thermal resistance is max. 120 °C. The cable construction complies
with VDE 0282 part 804.
All motors are fully protected by thermal contacts. If the permissible temperature limit of 135 °C is exceeded (e.g. due
to excessive ambient temperature, heating up due to high heating medium temperatures), these contacts come into
action and switch off the motor.
This full motor protection is only achieved with our switchgear.
No motor guarantee can be given when using third-party products.
Attention! The operator must have the equipotential bonding of the unit connected to the on-site
equipotential bonding system by a qualified electrician in accordance with the legal requirements,
standards and guidelines and ensure proper functioning. Mounted equipotential bonding must not be
removed.
Important: Switching capacity:
If the full motor protection is activated, the motor should only be put back into operation after it has cooled down and
the selector switch on the switchgear has been reset to zero (except switchgear 670.1).
After connection, check the direction of rotation of the fan. Fan runs correctly when air comes out of the blind frame.
Change the direction of rotation by exchanging 2 phases. When connecting the switchgear and motors, observe the
local regulations.
10 A at cos
6 A at cos
Rated voltage:
250 V
Dielectric strength:
2 000 V eff.
High speed
- circuit
High speed
- circuit
Anticlockwise rotation
= 1,0
= 0,6
Low speed
Y - circuit
Low speed
Y - circuit
Clockwise rotation
18
18
Motor 001 / 006
Motor with 2 speeds
by Y /
change-over
with thermal contact,
Change of direction of rotation
by reversing 2 phases.
Without bridge when using speed
changeover switch.
Motor 002
Motor with 2 speeds
by Y /
changeover
with PTC thermistor,
change of direction of rotation
by reversing 2 phases
Without bridge when using speed
changeover switch.
Motor 003
Motor with 1 speed
and operating capacitor
with thermal contact,
change of direction of
rotation see circuit.
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