DIGITEN DTC-102 Digital Temperature Controller Thermostat User Manual

DIGITEN DTC-102 Digital Temperature Controller Thermostat

The DTC-102 Thermostat is a dual-stage, digital temperature controller. The large, lighted LCD screen display is easy to read. The case is designed with fireproof ABS material for human engineering. The temperature sensor is waterproof with high quality, high-accuracy.

Features

• Large LCD screen;
• Dual relay output, be able to control heating and refrigeration equipment at the same time;
• Support reading with Centigrade or Fahrenheit unit;
• Maximum output load: 1100W@110V,2200W@220V;
• Easy to use and program, plug and play device;
• With a temperature correction function;
• Delay starting protection for refrigerating compressor;
• High and low temperature alarms are available；
• Over-temperature and sensor fault alarm
• Heating/Cooling return difference could be set separately for refrigeration and heating to protect temperature controller from violent change;
• Could use heating or cooling function separately.

Technical specifications

Note: The waterproof temperature sensor works with water, saltwater, weak acid or weak base liquid.

Panel instructions

1. PV: Current temperature.
2. SV: Set Temperature
3. HD: Heating Differential
4. CD: Cooling Differential
5. AL: Low-Temperature Alarm
6. AH: High-Temperature Alarm
7. DP: Time of Compressor Delay Starting
8. CA: Temperature Calibration
9. : Setting Mode
10. : Cooling Mode
11. : Heating Mode
12. Csp: Cooling Start Point, Csp=SV+CD
13. Hsp: Heating Start Point, Hsp=SV-HD

View setting value

When the controller is working normally, short press SET and you can look at the parameter values in order.

Setting Instruction

How to change the temperature unit

1. Long press the SET button until ℉ and ℃ flash
2. Press to switch the desired temperature unit
3. Long press SET button for 3S again to save and exit
   Notice: When temperature unit value has been changed, all the setting value will be recovered to factory settings.

Set the SV value

1. Press and hold the SET button until the icon appears on the LCD, this will take over 3 seconds.
2. Short press the SET button again until flashing.
3. Press the button to adjust the current SV value.
4. 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.
Set Other Functions

1. Long press the SET button about 3 seconds until LCD display
2. Press to adjust the temperature
3. Short press SET button to set next function.
4. Long press SET button to save and exit.

After setting, Csp value and Hsp value will show the result that it could confirm whether you have set up correctly.
Csp(Cooling start point) =SV(set value) +CD (cooling differential)
Hsp(Heating start point)=SV(set value)-HD(heating differential)
Note: Please do not connect any load (heating or cooling equipment) before you set= parameters.
How to restore default settings
Keep pressing the SET key until connect the power to this device, controller will restore the factory setting after BI-BI-BI sound.
Function range and setting

Function Introduction

1. Cooling Mode
   When PV(Current Temperature) ≥ Csp(Cooling Start Point), the temperature controller enters cooling mode. The LCD will show ,the cooling LED is light on the panel, the cooling relay is closed, then the cooling socket will output voltage, and the cooling equipment start working. When LED flash, it means the cooling equipment enters compressor delay protection status. When PV≤SP, on LCD will disappear, the cooling LED lights out, the cooling relay is opened, and the cooling equipment stop working
   Eg: Setting SV=25°C, CD=2°C, HD=30 so Csp=SV+CD=27r, Hsp=SV-HD=22-C. When the current temperature PVS≥27℃ (Csp), the temperature controller enter cooling mode, and the cooling equipment start working. When the temperature is less than 25℃ (SV) , it stops cooling. In addition, when the current temperature PV≤22℃(Hsp) , it enters heating mode. When the temperature is more than 25℃ (SV) , it stops heating.
2. Heating Mode
   When PV(Current Temperature) ≤ Hsp(Heating Start Point), the temperature controller enters heating mode. The LCD will show ,the heating LED is light on the panel, the heating relay is dosed, then the heating socket will output voltage, and the heating equipment start working. When PV≥SP , on LCD will disappear, the heating LED lights out, the heating relay is opened, and the heating equipment stop working.
3. High /Low-temperature Alarm (AH/AL)
   When the current temperature PV ≥ high-temperature alarm value AH, the high-temperature alarm will be triggered, the buzzer will alarm with tone” Bi-Bi-Bi”, press any key to cancel the alarm until the temperature is lower than AH value. At the same time, cooling and heating function stops. When current temperature PV ≤ low-temperature alarm value AL, the low-temperature alarm will be triggered, the buzzer will alarm with tone” Bi-Bi-Bi”, press any key to cancel the alarm until the temperature is higher than AL value. At the same time, the cooling and heating function stops.
4. Time of Compressor Delay Starting (DP)
   Under refrigeration mode, after power on, if the current temperature PV is higher or equal to Temperature Setting Value (SV) plus Cooling Differential (CD), the equipment won’t start refrigeration immediately, but it will wait for a delay time to work. When the time interval between two refrigeration operations is larger than preset delay time, the equipment will start refrigeration immediately; when the time interval between two refrigeration operations is less than preset delay lime, 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 a deviation between the current temperature and actual temperature, use the temperature calibration function to correct the current temperature and actual temperature. Corrected Temperature = Temperature before Calibration +Corrected Value(corrected value could be a 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. The default setting is displayed with a Centigrade temperature value.
7. LCD Backlight Control
   Press and SET buttons simultaneously about 3 seconds until the LCD appears , the LCD will be stay on. Press and SET buttons simultaneously about 3 seconds until the symbol disappears, the LCD light will shut off automatically after 30 seconds.
8. Unconventional Setting
   When SV, CD, HD setting values exceed the setting range, or Csp and Hsp values exceed the measuring temperature range, buzzer will alarm with 2 beeps “bi-bi-bi”, and all the setting value will be recovered to factory settings.

Application

The DTC-102 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 freeze and coolers
• Boiler operating control
• Condenser fen cycling or staging
• Cooling tower pump and fan control
• Space and return air temperature control
• Aquarium water temperature
• BBQ
• Over temperature control/protection

Troubleshooting

If you have a problem with a thermostat, there’s usually a quick and simple solution.
Green LED flash when powered on
It is a normal phenomenon, Delay Starting Protection function for Refrigerating Compressor is working. Now PV(current temperature) is higher or equal to Csp(Cooling Start Point), you could enter Setup Mode directly, or wait 3 minutes until it doesn’t flash green light before setting the temperature controller.
Err Alarm
When the temperature sensor is in short-circuited or open-circuited, the controller will prompt sensor fault mode, and cancel all the actions. The buzzer will alarm, and LCD displays Err. The buzzer alarm could be dismissed by pressing any key. After the faults solved, the system will return to normal working mode.
HL Alarm
When the current temperature exceeds the measuring range (less than -40 ℃ /-40 ℉ or higher than 120 ℃/248 ℉), the controller will prompt over-temperature alarm mode, and cancel all the actions. The buzzer will alarm, and LCD displays HL. The buzzer alarm could be dismissed by pressing any key. When the temperature returns to the 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 the thermostat works fine, the working mode or appear on the LCD.
2. Please check if the loading is contacted reversely to the heating or cooling outlet If your DTC-102 does not operate properly after trying the troubleshooting steps, please send your questions to our email: [email protected] .

WARRANTY

The DIGITEN products are guaranteed to the original owner for one year against defects in workmanship and materials. Please contact us: [email protected] or www.digit-en.com/support
WARNING
Do Not Overload
This unit works with load up to 10A. If load is larger than 10A, it would become very hot and even burn the thermostat. That is very dangerous. It is best that the load is less than or equal to 7A if you require the temperature controller to work stably for the long term. The probe is waterproof, but controller is not waterproof, so don’t get water into the controller and outlet.
COPYRIGHT© 2019 DIGITEN CO..LTD ALL RIGHTS RESERVED

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DIGITEN DTC-102 Digital Temperature Controller Thermostat User Manual