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Hygrotherm VU

Sauna control for dry saunas (80…110 °C) or wet saunas (40…60 °C), max. 9 kW

Electronic sauna control unit for “Finnish” (dry) or “hygro” (humid) sauna bathing. Temperature and humidity are infinitely adjustable according to the desired sauna type “Finnish” or “hygro”. The device has switches for light/fan/heating, a preselection timer (12 hours maximum), light indicators ON/OFF / dry/hygro mode / heater heating phases / evaporator heating phase, low water detection and acoustic low water alarm, sensor breakage/sensor short circuit protection, heating time limitation (6h/12h/without), connection for remote on/off switching. The automatic run-on dry heating (+60…+80 °C, max. 3.5 h) with fan activation prevents mold growth. The scope of delivery includes a temperature sensor with safety temperature limiter (141 °C) and 3 m silicone cable. A load extension is possible with the LG x/xx power control units. The light, fan and internal electronics are fused separately.


Display Heating, On/Off, Preselection timerYes
Type of accessories/spare partsauna control
STB trigger temperature141 °C
Operating voltage400 VAC, 50 Hz (3/N)
Electric connectionscrew terminals
Colourcream white
RAL colour number (similar)9001
Heating time limitation6H/12h/none
Max. air humidity (non-condensing)95 % r.H.
Housing materialplastic ABS
With LED displayYes
Mounting/attachmentwall mounting
Humid sauna control range40 … 60 °C
Control range dry sauna80 … 110 °C
Switching differential1 K
Switching elementsafety guard, relay 3-stage switching
Fan On/Off switchYes
Fan switch 3-stageYes
Switching power light100 W
Switching power oven9 kW
Switching power fan100 W
Switching power evaporator3 kW
Protection classIP44
Protection classII, following appropriate mounting
FuseT1, 25A (5×20)
Ambient temperature−15 … 25 °C
Preselection timercan be set to max. 12h / 1h steps
Water shortage detectionYes
Assemblycontrol unit, sensor/STB, screws
Dimensions (W x H x D)212 mm x 237 mm x 70 mm

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