Vent-Axia VAUFHTC, Installation And Wiring Instructions

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Page 2: ... 5 Operation of the thermostat 7 5 1 Constant temperature mode 8 5 2 Event based mode 8 5 3 View measured sensor values 11 6 Changing settings 11 6 1 System settings 11 6 2 Sub settings parameters 12 6 3 Event mode settings 14 6 4 Setting the clock 16 6 5 Setting the timer 17 7 Error messages 18 8 Resetting the thermostat 18 Installation instructions 19 ...

Page 3: ...re is set by the user according to his her needs at any given time If switched to event mode the temperature target will be changed according to the default program as shown in section 4 In event mode the thermostat controls the temperature according to time and day For weekdays and weekend different temperatures can be set at different times In this way it is possible to reduce the output during ...

Page 4: ...imit the room sensor is used for regulating temperature according to the set value If the heat indication symbol is shown in the display it means the thermostat is heating but the symbol is not directly linked synchronized to the relay controlling the power to the heating cable The thermostat is turned on and off by using the ON OFF button When turned off the settings will be remembered The thermo...

Page 5: ... Designed working temperatures 1 50 C Room sensor for sensors 1 80 C Floor sensor Dimensions 84x84x40mm 25 mm socket Encapsulation IP 21 Length floor sensor cable 3 m Cross section area connecting wires 0 5 mm 2 5 mm Max number of heating cables 3 Sensing element NTC Display LCD blue backlighting The thermostat is maintenance free ...

Page 6: ...ME THE THERMOSTAT IS TURNED ON When the Ref 446174 is powered ON for the first time the following will be shown in the display heat indication shown according to temperature level Floor sensor Heat indication symbol Antifreeze Day of week Event operation mode symbols Timer Shown when setting events modes Shown when adjusting general settings Shown if override is active ...

Page 7: ...predefined program will start running MONDAY FRIDAY Start time for normal operation morning 06 00 Temperature 21 C Start time for day saving operation 09 00 Temperature 16 C Start time for evening operation 17 00 Temperature 21 C Start time for night saving operation 22 00 Temperature 16 C ...

Page 8: ...ting settings and other operational possibilities please see section 5 and 6 5 OPERATION OF THE THERMOSTAT To change between constant temperature mode and event mode This function is linked to the clock function Enter general settings See section 6 1 and go to sub setting 11 CL clock settings If the clock is disabled the thermostat will run in constant temperature mode Event mode is activated by a...

Page 9: ...ature or the set temperature according to settings see section 6 1 and sub setting 12 DF default display The set temperature can be adjusted by the user by pressing the UP and DOWN buttons 5 2 Event based mode The temperature is regulated dependent of time and day as set by the user 8 ...

Page 10: ...ase Saturday In event mode of operation the thermostat regulates the temperature according to four different events the user can define time and temperature for all four 9 For MONDAY to FRIDAY Normal operation morning From time A to B Day saving operation From time B to C Evening operation From time C to D night saving operation evening operation the habitants return to the house day saving operat...

Page 11: ...and temperatures of all events can be programmed by the user please see section 6 3 Event mode of operation can be overridden by the user This is done manually by setting a new temperature with the UP and DOWN buttons Leave the thermostat and it will return to override mode after 10 seconds OVERRIDE is now shown in the display The thermostat will regulate the temperature according to the override ...

Page 12: ... see section 6 2 Press and hold CLOCK button for 3 seconds to see measured value of floor external sensor SET symbol will disappear Press and hold ON OFF button for 3 seconds to see measured value of room internal sensor SET symbol will disappear 6 CHANGING SETTINGS 6 1 System settings First turn the thermostat OFF then press and hold the UP and DOWN buttons 5 seconds until the following is shown ...

Page 13: ...tween the other 12 different sub settings UP and DOWN keys adjust the current parameter as shown in the display 6 2 Sub settings parameters 01 CF Set whether to show temperatures in Celsius or Fahrenheit degrees 00 Celsius 01 Fahrenheit 02 DI Shows the dead band range For information only the value cannot be changed 03 CA Calibration You can manually set the value of the current measured temperatu...

Page 14: ... settings Minimum limits as set in sub setting 06 and 08 will be used for antifreeze purposes In addition if both sensors are active sensor mode 02 the thermostat will limit the maximum floor temperature using the floor sensor max value according to the value set in sub setting 09 Active sensor according to setting 10 SE will be used for temperature measurement If sensor mode 02 the room internal ...

Page 15: ...11 CL Clock NO No clock thermostat will run in constant temperature mode 12h 12 hour clock with AM PM 24h 24 hour clock without AM PM displayed If either 12h or 24h is active event mode will also be activated 12 DF Default display of temperature set or measured temperature 00 display measured temperature 01 display set temperature Leave all buttons for 10 seconds to save all settings and return to...

Page 16: ...with UP and DOWN buttons Press CLOCK button once to jump to the temperature and use UP and DOWN buttons to set the temperature for this event timeframe In other words time A see section 5 2 is set first thereafter the temperature for this timeframe The end time of each timeframe is defined by the start time of the next timeframe Press CLOCK button again to jump to next event and thereby defining t...

Page 17: ...settings will be saved and display will return to default display Pressing ON OFF button will cancel and return to default display 6 4 Setting the clock Press DOWN and CLOCK button simultaneously for 5 seconds to set the clock clock must be active sub setting 11 CL The following will be displayed The hour is set first UP Increases value of blinking parameter DOWN Decreases value of blinking parame...

Page 18: ... timeframe each day you can use the timer function Press and hold UP and CLOCK buttons simultaneously for 5 seconds to enter timer setup First startup time is defined Use UP and DOWN buttons to adjust blinking value and use CLOCK button to jump to next value After startup time is defined end time is defined Leave all buttons for 10 seconds and settings will be saved The thermostat will now switch ...

Page 19: ...2 will be displayed flashing along with an indication of which sensor is faulty E1 means the sensor connection is short circuited E2 means there is an open circuit at the sensor connection For example the message below indicates a short circuit at the internal room sensor 8 RESETTING THE THERMOSTAT To reset the thermostat to its original factory settings turn it off 18 ...

Page 20: ...ia VAUFHTC Ref 446174 Product description VAUFHTC Ref 446174 is a digital thermostat for controlling electrical underfloor heating cables The thermostat is equipped with an integrated room sensor and is delivered with an external floor sensor The thermostat shall be mounted in a standard junction box Technical data Rated Voltage 220 240V 50 60 Hz Max load 3600 W 16 A at 230 VAC IP class IP 21 ...

Page 21: ...only Warranty Vent Axia offers a 2 year warranty on defects in material and workmanship in the sold product under proper use and service In case of a defect Vent Axia will repair or replace the product The warranty does not extend to defects caused by a faulty installation or improper use Vent Axia must be given written notice of any defect within 30 days after the defect was discovered Further a ...

Page 22: ...ve the floor If the room sensor is used the thermostat must be positioned so that air freely can flow through the thermostat chassis Avoid placing the thermostat in places where it will be exposed to direct sunlight or draught Make sure that the heating cable s cold lead reaches the planned position of the thermostat If installing floor sensor Start by following the instructions in section 1 For i...

Page 23: ...unscrewing the circuit breaker s Verify with a voltmeter that the circuit is completely disconnected by measuring phase neutral phase ground and neutral ground Table 1 Room type Floor sensor Room sensor Room floor sensor limita tion se nsor Recommended heating cable products from Vent Axia Concrete floor with tiles stone or slate high area load 100 150 W m Bathroom Washroom Toilet Wet rooms in gen...

Page 24: ...crete floor with parquet or laminate low to medium area load 60 100 W m Living room Kitchen Hall Sleeping room Living areas in general X X VAUFHC VAFHM100 150 Wooden floors dry solutions no need for concrete screed Low area load 50 100 W m Living room Kitchen Hall Sleeping room Living areas in general X X VAUFHC VAFHM100 150 Required by some parquet laminate suppliers ...

Page 25: ... It is recommended to position the conduit sensor as close to the floor surface as possible fig 1 1 2 Feed the sensor into the conduit so that the sensor itself is positioned near the end of the conduit in the floor 1 3 Proceed to section 2 2 Installation of the thermostat 1 4 Verify that the supplying circuit is completely disconnected 1 5 If the heating cables are installed in a wet room for exa...

Page 26: ...g 3 1 9 If the floor sensor shall be used It shall be connected to the connectors 1 and 2 fig 3 1 10 Connect the heating cable s earth conductor to the building s earth using an approved connector or connect them together in connector 3 fig 3 REMEMBER Heating cables shall always be connected to earth 1 11 Put the backside socket in place into the junction box and fasten by using mounting screws 1 ...

Page 27: ...ins so they start going into the slot correctly then press the entire cover into its final position 1 13 See the enclosed user manual for operation programming of day night function clock setting and general setting adjustments Fig 1 Positioning of the floor sensor 26 ...

Page 28: ...cket Slot to align pins into BE CAREFUL Pins must go correctly into slot Use Screw Driver to open the plastic housing Slot to align pins into BE CAREFUL Pins must go correctly into slot Use Screw Driver to open the plastic housing Fig 3 Thermostat back side 27 ...

Page 29: ...L CENTRE Newton Road Crawley West Sussex RH10 9JA SALES ENQUIRIES Tel 0844 8560590 Fax 01293 565169 TECHNICAL SUPPORT Tel 0844 8560594 Fax 01293 539209 For details of the warranty and returns procedure please refer to www vent axia com or write to Vent Axia Ltd Fleming Way Crawley RH10 9YX 446256A 0111 28 ...