SW 2.1 D switching unit
Rotary current 400 volt, fan
Design
Plastic housing, protection type IP 65.
Protective insulation in accordance with VDE, front plate with symbols for switching positions and operating modes, power input and protective conductor terminals, main contactor, speed selector with the functions “Speed 1 / Speed 2“, control fuse, operating and mal- function lights, operating mode switch with the functions “Off / Release / Thermostat / Continuous Operation”, control relay, terminals for the motor output, connection terminals for the thermal contacts, room thermostats and frost protection thermostats.
Functionality
The frost protection thermostat switches the fan off.
Wiring diagram
Switching on again after a problem
Each time the power supply is interrupted or the fan malfunctions, the operating mode switch has to be reset to “0/Release”!
Group switching
The switching unit is suitable for group switching. Sev- eral motors wired the same way can be connected to one switching unit.
The total capacity of the connected motors may not ex- ceed the permissible switch capacity of the switching unit. The thermal contacts of all motors are to be con- nected in a row.
Important information about safe operation
Grounding and earthing or protective wiring and fuse protection must be done by the customer in accordance with the requirements of the VDE as well as the respon- sible EVU.
The electrical unit connections must be performed by authorised personnel in the line with the valid require- ments in compliance with local laws and in accordance with the wiring diagrams.
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| Night |
| Day |
| Thermal |
| Frost protection |
Power supply | Fan motor | thermostat |
| thermostat |
| contact |
| thermostat |
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| motor |
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400V / max.16A |
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If several fans are operated simultaneously up to a |
| If several fans are operated simultane- | ||||||
total capacity of max. 4 kW, the connection is made |
| ously, connect all thermal contacts in in | ||||||
| via an external terminal distributor! |
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| a row! |
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Wiring diagram of the thermal contacts
Thermal | Thermal | Thermal |
protection for 2 | protection for 3 | protection for 4 |
units | units | units |
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