Siemens 2NC9 User's Manual
Contents
1. MHz Temperature Internal sensor 5 30 C Floor sensor 5 40 C Temp limit Two sensors 27 floor OFF switch No Sensor type NTC 100kQ 25 C Measure I x w xh 70 x 70 x 55mm Building depth 32mm El number 54 683 88 SIEMENS DigiHeat room thermostat 16A 2NC9 840 SIEMENS Phor 2 O 580 042b GB 1810042. after a few seconds indicating the thermostat is once again configured The thermostat is now controlled by DigiHeat Normal operation During normal operation the thermostat is controlled by DigiHeat If the radio communication for some reason should fail the thermostat will start regulation according to its own temperature setting after 1 hour The green OK lamp will start to blink When the radio communication is re established the DigiHeat control unit will automatically take over Installing the floor sensor The floor sensor is put inside an installation tube embedded in the concrete floor The tube should be sealed and placed as high in the concrete layer as possible Only the enclosed floor sensor must be used Placing of the thermostat with internal room sensor The thermostat should be placed on the wall 80 150 cm from the floor where air can pass without obstruction Direct sunlight should be avoided The thermostat is not approved for outdoor use LED indicators Red ON Heat element ON Red OFF Heat element OFF Green ON Thermostat is configured Green blinking Unit not configured or radio signal is missing Sensor alternatives Floor sensor Constant floor temperature typically in rooms where you walk barefooted Floor sensor is automatically used when connected Note that a temperature setting of 5 30 C on DigiHeat is equivalent to a floor temperature setting of 5 40 C Internal sensor a
3. blinking local control of comfort temperature is possible To toggle between these two modes push the button once The choice of mode must be done during 10 seconds after activation The local control of comfort temperature is well suited for offices kindergartens and rental housing where it is preferred to let each user control the temperature during comfort hours Note that when this function is activated the comfort temperature displayed on DigiHeat will not have any meaning During normal operation one push on the button allow for 3 hours cancellation of setback or frost protection temperature for example during overtime hours This function is only possible for version v 1 03 see product label Room thermostat The thermostat is prepared to receive measured temperature from DigiHeat In such case the measured temperature from DigiHeat will be used to control the room temperature and the internal sensor is no longer in use See sensor alternatives For DigiHeat 1 this will mean the internal sensor in DigiHeat will control room temperature For DigiHeat 6 the internal sensor can be activated for zone A by setting P1 1 see instruction DigiHeat 6 Note that DigiHeat must be placed in the temperature zone This function is only possible for version v 1 03 see product label Technical specifications Operating voltage 230V 10 Maximum load 16A resistive Isolation Class II Protection IP30 Frequency 433 42
4. 30V 4VA 16A l Adhi 3 aan Floor sensor Mains 230V 10 The thermostat is then mounted inside the connection box Heat element Max 16A CD Screwhole Refit the frame and the front cover Ensure that the arrow marked TOP is pointing upwards as shown in fig 4 Fasten the screw and put the control knob back in position Note DigiFloor is not equipped with a 2 pole switch and a separate switch must be mounted if required by the particular installation Note DigiFloor is not equipped with an earth terminal Any earth terminals from heat cable mains must be connected by separate earth connector Configuration of DigiFloor see also user instruction for DigiHeat First time configuration When installed for the first time the thermostat s green OK lamp will blink This blinking indicates the thermostat is not being programmed to receive information from the DigiHeat control unit Put DigiHeat in configuration mode see DigiHeat user instructions Press the push button marked on the thermostat The OK lamp will be lit and indicate that the thermostat is ready to receive information from DigiHeat Reconfiguration Hold the push button on the thermostat down for about 10 seconds until the OK lamp starts to blink Press the push button once The OK lamp will light
5. Description DigiFloor is an electronic thermostat for the regulation of floor heating Mounting is done via a connection box The thermostat is controlled wirelessly by the DigiHeat control unit Time base for switching of load is 20 minutes DigiFloor must be installed by an authorized electrician If the floor sensor is not connected the thermostat will use an internal air sensor for the regulation of room temperature 5 30 C When the floor sensor is connected switching times are operational according to floor temperature When the floor sensor is used the setpoint temperature should be considered as a guide figure only Start off with a setpoint temperature of 20 C and adjust setpoint temperature until floor temperature is at your comfort level NOTE It takes hours for the floor temperature to stabilize It is possible to use both the internal air sensor and floor sensor The internal air sensor will regulate room temperature while the floor sensor will limit the floor temperature to a maximum of 27 C See paragraph sensor alternatives for details Installation of DigiFloor Remove the control knob by pulling it towards you fig 1 Remove the bigger of the two screws below the control knob fig 2 Fig 1 O c Oo SIEMENS o o N Mhaor gt Screw The front cover and the frame can now be removed Turn the thermostat and complete the necessary connections fig 3 Fig 2 2
6. ir Temperature setting on DigiHeat indicates required room temperature 5 30 C The floor temperature will depend on the room temperature Internal sensor should be used if floor sensor is not possible Two sensors The wire 2 as shown in fig 5 must be cut for the thermostat to use both internal air sensor and floor sensor Use cutting pliers 1 Internal air sensor or sensor in DigiHeat is used to regulate room temperature according to setpoint temperature Maximum floor temperature is limited to 27 C Typically for parquet or other temperature sensitive floor types Fig 5 P Local temperature control when DigiHeat is in comfort mode In some situations it might be preferable to let the user adjust the temperature on each heater without having to do adjustments on DigiHeat The thermostat has a built in feature which will allow this Normally each heater is controlled 100 by DigiHeat and local control of temperature is not possible Note that only comfort temperature can be controlled on each heater while setback D and frost protection OUT is controlled by DigiHeat as normal To activate this function hold the gt button down while the mains voltage is connected fuse or switch Then let go of the button when either the red or green light is blinking When the red light is blinking it indicates that no local control of comfort temperature is possible When the green light is
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