Troublesome thermostat 1 Important Safety Instructions System Drawing To reduce the risk of fi re, electric shock or injury, read all the safety F11 F21 Outdoor air instructions and warning texts Extract air HR-X before using the unit. • This unit is only designed to handle F10 F20 ventilation air in buildings.
3 Operation - Control The speed of the fans in the unit is controlled from a separately mounted SP30 control switch. Depending on the operating Green situation, the fan speed is set to the desired Yellow level. MIN stage: Used when less ventilation than normal is required.
4 Troubleshooting FAULT DO THE FOLLOWING • Check that the power plug is correctly inserted in the power point. If the fans are not working or cannot be • Check that the fuses in the electrical cabinet are switched on. adjusted •...
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It is recommended that you order a fi lter subscription to ensure full benefi t from the system and the cheapest prices. Order no. for a complete set of fi lters: L4 X/TT- 12318, L7 X/TT - 12313 Position of the troublesome thermostat Loft model fi...
7 Technical Data 7.1 Technical Data, L4 X/L4 X TT L4 X L4 TT X TT Rated voltage 230 V/50 Hz 230 V/50 Hz Fuse 10 A 10 A Rated current, total 8.7 A 8.7 A Rated power, total 1980 W...
(as shown on page 2) can be switched over to the specifi ed voltage level. Extract air Supply air L4 X / L7 X: The automatic control compartment is on the top of the unit. Factory setting 150 V 170 V 9.2 Control Card Adjustment Options...