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AIR HEATER WD-A, WD-U
08
Commissioning
08.04 Assignment of fan connection EC with repair switch
Unit type
12 E, 13 E, 14 E
22 E, 23 E, 24 E
32 E-E, 33 E-E, 34 E-E
32 E-D, 33 E-D, 34 E-D
42 E-E, 43 E-E, 44 E-E
42 E-D, 43 E-D, 44 E-D
The nominal voltage specified on the type plate applies. Three-phase AC motors designed for a nominal voltage of
380 V can be used in accordance with DIN / EC 38 in the range 400 V + 6 / - 10 %, single-phase AC motors 220 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 come into
action and switch off the motor.
Work on electrical installations may only be carried out by a qualified electrician.
• A repair switch must be fitted to each unit in order to be able to switch off all poles of the drive
motor without voltage during maintenance work.
• Only operate motors when the blow-out blinds and motor protection blinds are open.
• The motors, switchgear and other electrical accessories must be connected in accordance with the relevant
standards (VDE 0100; EMC law; regulations of the power supply company).
• No frequency converters should be used for speed control, as this can lead to increased heating of the motor
in the lower speed range. The motors are voltage controllable, i.e. their speed range can be controlled via
transformer control units or phase angle control.
• Ambient air intake temperature maximum 40 °C.
Wiring diagram number
4
4
2
2
1
1
20
20
Supply voltage
230
230
230
400
230
400
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