17
01
17
Air Heater
WD-A, WD-U
Commissioning
07
This complete motor protection is only achieved by WOLF - switching devices . When using other
makes, no motor guarantee can be granted .
Important:
Switching Capacity:
10 A at cos
ϕ
= 1,0
6 A at cos
ϕ
= 0,6
Nominal Voltage:
250 V
Voltage Strength:
2 000 V eff.
If the complete motor protection reacts, the motor has to be put into operation again only after cooling-down and
reposition of the selector switch into position “zero” at the switching device (except switching device 670.1).
After connection, check turning direction of the fan. The fans runs in the right direction, if air comes out of the lou-
ver frame.
The turning direction can be changed by exchanging 2 phases.
When connecting the switching devices and motors, the local prescriptions have to be observed.
The nominal voltage indicated on the identification plate is valid. Three-phase motors which are rated for a nominal
voltage of 380 V can be used in the range of 400 V + 6 / - 10 %, one-phase alternating-current motors 220 V in the
range of 230 V + 6 / - 10 % acc. to DIN / EC 38.
Connection cable made of EVA-aethylene-vinylacetate hose pipe 4 GJ1 acc. to VDE 0208 / 3.69. This pipe is appro-
ved for operational voltages up to 500 V, the thermal resistance is may. 120 °C. Pipe construction acc. to VDE 0282
part 804.
All motors have got a complete motor protection by thermo-contacts. When exceeding the admissible temperature
limit of 135 °C (for example by too high ambient temperature, heating-up by high heating medium temperatures),
these will react and switch off the motor.
Work on electric installations must be effected by qualified electricians, only .
•
A repair switch must be fixed at each machine, in order to be able to switch off the driving
motor dead on all poles during maintenance work .
•
Put motors into operation only with opened blow-out louvers and motor protection louvers.
•
The connection of the motors, switching devices and other electric accessories must be effected acc. to the
relevant standards (VDE 0100; EMV-Law (Electromagnetic Compatibility); Regulations of EVU (Power Supply
Company).
•
For controlling the rotational speed, no frequency converters should be used, since this can lead to an
increased heating of the motor in the lower rotational speed range. The voltage of the motors can be
controlled, i.e. their rotational speed can be controlled by transforming control devices or phase-shifting
control.
•
Ambient air suction temperature max. 40 °C.
Motor 001 / 006
Motor with 2 Rotational Speeds
by switching over
with thermo-contakt,
modification of turning direction
by exchanging 2 phases.
Without bridge when using a
speed switch.
Motor 002
Motor with 2 Rotational Speeds
by Y /
switching-over
with cold conductor,
modification of turning direction
by exchanging 2 phases.
Without bridge when using a
speed switch.
Motor 003
Motor with 1 Rotational Spped
and operating Capacitor with
Thermo-contact, modification of
turning direction cf. circuit.
High Rotational Speed
Delta-Circuit
High Rotational Speed
Delta-Circuit
Direction to the left
Direction to the right
Low Rotational Speed
Star-Circuit
Low Rotational Speed
Star-Circuit
