Panasonic PWW 4000 manual SW 2.2 DSK switching unit, Design, Functionality, Wiring diagram

SW 2.2 DSK switching unit

Rotary current 400 volt, fan 2-speed maximum electrical capacity 4 kW

Wall-mounted, full motor protection through integrated connections for thermal contacts, connection terminals for thermal contacts, room thermostats, frost protection thermostat and mixed-air box adjustment motor.

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, frost protection thermostats, mixed-air adjustment motor and flap positioning switch.

Functionality

The mixed-air box can be controlled by means of a flap positioning switch. If the ventilation is shut off, the flaps are automatically set to “Closed”.

The frost protection thermostat closes the flaps 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.

		Air supply flap	Night	Day	Thermal	Frost
Power supply	Fan motor	~ 230 V	thermostat	thermostat	contact	protection
					motor	thermostat
400V / max.16A	2-speed / 400V
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 a
	via an external terminal distributor!				row!

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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