Control units

Control units RZN, 4402-K, 4404-K, 4408-K

Control units are used for operating motors in the event of a fire as well as daily building ventilation. It is possible to connect OSD rain sensor, ZRD rain sensor, RT 45 alarm buttons, LT 84U ventilation switch. The control unit works in monitoring mode on a daily basis and is supplied from 230V AC mains. In case of a fire, the rain sensor sends a signal to the control unit which, in turn, automatically sets in motion the window motors. Because of safety considerations, the control unit is equipped with an independent power backup which allows it to work in the monitoring mode for 72 h.

Technical parameters	RZN 4402-K	RZN 4404-K	RZN 4408-K
power supply	230V AC/50 Hz	230V AC/50 Hz	230V AC/50Hz
output power	to 60W	to 120W	to 240W
rated current	2A	4A	8A
output voltage	24V DC 2	24V DC	24V DC
working temperature	(-5°C) do (40°C)	(-5°C) do (40°C)	(-5°C) do (40°C)
dimensions	250/250/91mm	250/250/91mm	341/341/91mm
weight with batteries	4,12 kg	5,3 kg	11 kg
battery capacity	2x12V/1,3Ah	2x12V/2,1Ah	2x12V/3,4Ah

LT 84U ventilation switch

Used in smoke ventilation systems for daily opening and closing windows with installed motors connected to the RZN 440_-K control unit. It has been designed as a thin, underplaster switch with two buttons. Available in white.

Technical parameters	LT 84U
working temperature	-10°C do +50°C
dimensions	80/80mm
weight	0,15kg

RT 45 alarm button

Used for manual operating the smoke ventilation system in the event of fire. It is equipped with diodes signalising work mode or system malfunctions. It offers also a function allowing manual alarm cancellation.

Technical parameters	RT 45
power supply	24V DC
alarm current	20mA
working temperature	(-10°C) do (50°C)
dimensions	129 x 138 x 39mm
weight	0,35kg

ZRD rain sensor

It ensures automatic window closing in case of rain. It can co-operate with RZN 440_ - K control units. The sensor is heated, hence it is insensitive to such interference as mist, dew etc. It is installed in the open area of the roof, directly exposed to weather conditions. The signal from the sensor is accepted only when the control unit is monitoring. In the event of fire, signals from the sensor are ignored and have no effect on the window operating.