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Thermostat Manual DTC-101 DTC-151 www.digit-en.com service@digit-en.com Manual Index Features·························································································· 1 Technical Specifications······································································1 Panel Instructions··············································································2 View Setting Parameters·····································································2 Setting Instructions·······································································3 How to change temperature unit······················································3 Setup Flow Chart·········································································3 Setting the RUN temperature(RV) and STOP temperature(SV)··············3 Setting Other Functions·································································3 For example················································································4 Function range and setting··································································4 Function Introduction·········································································5 Cooling Mode··············································································5 Heating Mode··············································································5 High/Low Temperature Alarm (AH/AL)··············································5 Time of Compressor Delay Starting (DP)···········································5 Temperature Calibration (CA)··························································6 Display in Fahrenheit or Centigrade unit (CF)·····································6 LCD Backlight Control········································································6 Application······················································································· 6 Troubleshooting················································································ 7 Green LED flash when power on··························································7 Err Alarm·························································································7 HL Alarm·························································································7 Heating and refrigeration equipment don't work·······································7 WARRANTY···················································································· 8 WARNING ······················································································8 The Thermostat is simple-stage, electronic temperature controller. The large, lighted LCD screen display is easy to read. The case is designed with fireproof ABS material for human engineering. Temperature sensor is waterproof with high quality, high-accuracy. Features Large LCD screen Display the sensed temperature, setting temperature, and custom icons on the display indicate working mode. Support reading with Centigrade or Fahrenheit unit; Easy to use and program Only 2-steps setting for your application, and plug and play design. With a temperature correction function Allow user to adjust measuring accuracy base to on different probe, etc. Delay starting protection Protect refrigerating compressor lifetime, avoid compressor to compressor start frequently. High and low temperature alarms are available; Over-temperature and sensor fault alarm Technical Specifications Temperature Control Range Temperature Resolution Temperature Accuracy Temperature Control Mode Input Power Temperature Control Output Maximum output load Buzzer Alarm Sensor Type Sensor Length Relay Contact Capacity -40~120°C, -40~248°F 0.1°C, 0.1°F ±1°C, ±1°F Heating and Cooling 100~240VAC, 50/60Hz Max.10A/15A, 100-240VAC DTC-101, 1100W@110V, 2200W@220V; DTC-151, 1650W@110V, 3300W@220V High and Low Temperature Alarm Waterproof NTC sensor (Including) 2m, 6ft DTC-101(10A, 100-240VAC) DTC-151(15A, 100-240VAC) Input Power Cable Length Output Power Cable Length 150 cm/5ft 18cm/7" Note: The waterproof temperature sensor works with water, seawater, weak acid or weak base liquid. -1- Panel Instructions 1. PV: Current Temperature. 2. RV: Run Temperature 3. SV: Stop Temperature 4. AH: High Temperature Alarm 5. AL: Low Temperature Alarm 6. DP: Time of Compressor Delay Starting 7. CA: Temperature Calibration 8. Mode: Cooling: Working Mode 9. Mode: Heating: Working Mode View Setting Parameters When the controller is working normally, short press SET and you can look at the parameter values in order. -2- Setting Instructions How to change temperature unit To convert to Fahrenheit unit, press the and buttons simultaneously. Press them again to return to Celsius unit. Notice: When temperature unit has been changed, all the setting value will be recovered to factory settings. Setup Flow Chart Setting the RUN temperature(RV) and STOP temperature(SV) 1. Long press the SET button until RV value " " flashing. 2. Press and to adjust the temperature value. 3. Press SET button to set SV " ". 4. Long press SET button to save and exit. Note: If no entries are made for 30 seconds while programming is in progress, the control reverts to the normal temperature display. Setting Other Functions To set Low temperature Alarm(AL), High temperature Alarm(AH), Calibration(CA), Compressor Delay Starting(DP), use the method illustrated -3- and outlined below. 1. Long press the SET button until " " flashing. 2. Press and to adjust the temperature value. 3. Press SET button to set next function. 4. Long press SET button to save and exit. For example User want to start cooling equipment when PV=28°C, and stop cooling equipment when PV=22°C, DP=3 minutes. 1. Long press the SET button until " " flashing. 2. Press and to change the run temperature (RV) to 28°C. 3. Press SET button to set " " stop temperature (SV). 5. Press and to change the SV to 22°C. 6. Long press SET button to save and exit. 7. Connect the cooling equipment to the outlet. How to restore default settings Keep pressing SET key until connect the power to this device, controller will restore factory setting after BI-BI-BI sound. Function range and setting CODE Function RV Run Temperature Value SV Stop Temperature Value AH High Temperature Alarm AL Low Temperature Alarm Time of Compressor Delay DP Starting CA Temperature Calibration Setting Range -40~120°C -40~248°F -40~120°C -40~248°F -40~120°C -40~248°F -40~120°C -40~248°F 0~10minutes -15~15°C -15~15°F Default Setting 20°C 68°F 40°C 104°F 120°C 248°F -40°C -40°F 0 0°C 0°F -4- Function Introduction 1.Cooling Mode Set RV(RUN temperature) > SV(STOP temperature), the temperature controller enter cooling mode. The LCD will display , When PV(measuring temperature) is higher than RV, the cooling equipment starts working, and run LED will be turned on. When PV(measuring temperature) reaches to SV(STOP temperature), the cooling equipment stop working, and stop LED will be turned on. Note: When run LED is flashing, it means the cooling equipment enter compressor delay protection function. 2.Heating Mode Set RV(RUN temperature) < SV(STOP temperature), the temperature controller enter cooling mode. The LCD will display , When PV(measuring temperature) is lower than RV, the heating equipment starts working, and run LED will be turned on. When PV(measuring temperature) reaches to SV(STOP temperature), the heating equipment stop working, and stop LED will be turned on. 3.High/Low Temperature Alarm (AH/AL) When measuring temperature (PV) high temperature alarm value (AH), high temperature alarm will be triggered, buzzer will alarm with tone "bi-bi-Biii" , press any key to cancel the alarm sound, if user want to close alarm, please reset the AH value or wait until the PV is lower than AH. When measuring temperature (PV) low temperature alarm value (AL), low temperature alarm will be triggered, buzzer will alarm with tone "bi-bi-Biii" , press any key to cancel the alarm sound, if user want to close alarm, please reset the AL value or wait until the PV is more than AL. 4.Time of Compressor Delay Starting (DP) Under refrigeration mode, after power on, if the measuring temperature (PV) is higher or equal to Run Temperature (RV), the cooling equipment won't start refrigeration immediately, but it will wait for a delay time(DP) to work. When the time interval between two refrigeration operations is larger than -5- preset delay time, the equipment will start refrigeration immediately; when the time interval between two refrigeration operations is less than preset delay time, the equipment won't start refrigeration until achieve the preset delay time. Delay time will be recorded at the moment that refrigeration stops. 5.Temperature Calibration (CA) When there is deviation between current temperature and actual temperature, use temperature calibration function to correct the current temperature and actual temperature. Corrected Temperature = Temperature (before Calibration) +Corrected Value (corrected value could be positive value, 0 or negative value). 6.Display in Fahrenheit or Centigrade unit (CF) Users can select display with Fahrenheit or Centigrade temperature value according to their own habit. Default setting is display with Centigrade temperature value. LCD Backlight Control Press and SET buttons simultaneously about 3 seconds until the symbol disappears, the LCD light will shut off automatically after 30 seconds. Press and SET buttons simultaneously about 3 seconds until the LCD appears , the LCD will be stay on. Application The thermostat can be used to control a wide variety of dual-stage refrigeration and heating, or HVAC equipment. Typical applications include: Retail store display freezers and coolers Supermarket display cases for product/meats Retail store walk-in freezers and coolers Boiler operating control Condenser fan cycling or staging Cooling tower pump and fan control Space and return air temperature control Aquarium water temperature BBQ Over temperature control/protection -6- Troubleshooting If you have a problem with thermostat, there's usually a quick and simple solution. Green LED flash when power on It is a normal phenomenon, Delay Starting Protection function for Refrigerating Compressor is working. you could enter Setup Mode directly, or wait 3 minutes(base on DP setting value) until it doesn't flash green light before setting the temperature controller. Err Alarm When temperature sensor is in short-circuited or open-circuited, the controller will prompt sensor fault mode, and the buzzer will alarm, and LED displays Err. Buzzer alarm could be dismissed by pressing any key. After faults solved, the system will return to normal working mode. So make sure that the sensor is plugged into the hole fully, if it still displays Err, you can change another sensor. HL Alarm When current temperature exceeds the measuring range (less than -40°C /-40° F or higher than 120 °C/248 ° F), the controller will prompt over-temperature alarm mode, and cancel all the actions. The buzzer will alarm, LED displays HL. Buzzer alarm could be dismissed by pressing any key. When temperature returns to measuring range, the system will return to normal working status. Heating and refrigeration equipment don't work 1.Please make sure the setting value is correct. If thermostat works fine, the green LED(RUN) is on. 2.Please check if the loading is contacted reversely to heating or cooling outlet. If thermostat does not operate properly after trying the troubleshooting steps, please send your questions to our email: service@digit-en.com. -7- WARRANTY The DIGITEN products are guaranteed to the original owner for one year against defects in workmanship and materials. Please contact us: service@digit-en.com www.digit-en.com/support WARNING Do Not Overload This unit works with load up to 10A(DTC-101) / 15A(DTC-151). If load is larger than rated value, it would become very hot even burn the thermostat. That is very dangerous. It is best that the load is less than or equal to 7A(DTC-101) / 12A(DTC-151), if you require the temperature controller to work stably for a long term. The probe is waterproof, but controller is not waterproof, so don't get water into the controller and outlet. 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