DIGITEN DTC-102 User manual
Manual Index
Features ………………………………………………………………………………………page 1
Technical specifications………………………………………………………………………page 1
Panel instruction………………………………………………………………………………page 2
View setting value ……………………………………………………………………………page 3
Setting Instruction …………………………………………………………………………… page 3
Setup Flow Char ………………………………………………………………………….page 3
How to change temperature unit…………........................ .......................................page 3
Set the SV value………………………………….............................….......................page 4
Setting Other Functions………………………………….............................................page 4
How to restore default setting…………………………………....................................page 5
Function range and setting…………………………………….. .................................page 5
Function Introduction………………………………………………………………………......page 5
Cooling Mode………………………………………………………………………..........page 6
Heating Mode………………………………………………………………………..........page 6
High/Low Temperature Alarm (AH/AL)……………………… ....................................page 6
Time of Compressor Delay Starting (DP)……………………....................................page 7
Temperature Calibration (CA)……………………………….......................................page 7
Display in Fahrenheit or Centigrade unit (CF)……………........................................page 7
Application………………………………………………………………………………...........page 7
Troubleshooting………………………………………………………………………………...page 8
Warranty………………………………………………………………………………..............page 8
Warning………………………………………………………………………………...............page 8
- 1 -
The DTC-102 Thermostat is 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. 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
Temperature Control Range
-40-120℃, -40-248℉
Temperature Resolution
0.1°C,0.1℉
Temperature Accuracy
± 1℃, 1℉
Temperature Control Mode
Heating and Cooling
Input Power
100-240VAC, 50/60HZ
Temperature Control Output
Max.10A, 100-240VAC
Buzzer Alarm
High and Low Temperature Alarm
Sensor Type
Waterproof NTC sensor (Including)
Sensor Length
2m, 6ft
Relay Contact Capacity
Heating (10A, 100-240VAC)
Cooling (10A, 100-240WC)
Input Power Cable Length
120 cm/4ft
Output Power Cable Length
30cm/6.5"
Note: The waterproof temperature sensor works with water, saltwater, weak acid or weak base liquid.
- 2 -
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
-3-
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 temperature unit
1. Long press SET button until ℉and ℃flash
2. Press or 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 SET button until the icon appears on the LCD, this will take over 3
seconds.
2. Short press SET button again until flashing.
3. Press the and button to adjust the current SV value.
4. Press Set button to save and exit
- 4 -
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 and 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 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
Setting Range
Default Setting
SV
Temperature Setting
value
-40-120 ℃
25 ℃
-40-248 ℉
77 ℉
HD
Heating Differential
0.3-15 ℃
2.0 ℃
1-30 ℉
3.0 ℉
CD
Cooling Differential
0.3-15 ℃
2.0 ℃
1-30 ℉
3.0 ℉
AH
High Temperature
Alarm
-40-120 ℃
120 ℃
-40-248 ℉
248 ℉
AL
Low Temperature Alarm
-40-120 ℃
-40 ℃
-40-248 ℉
-40 ℉
DP
Time of Compressor
Delay Starting
0~10minutes
3minutes
CA
Temperature Calibration
-15-15 ℃
0℃
-15-15 ℉
0℉
CF
Temperature Unit
℃/℉
℃
-5-
Function Introduction
1. Cooling Mode
When PV(Current Temperature) ≥ Csp(Cooling Start Point), the temperature controller enter
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 and flash, it means the cooling equipment enter 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
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 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 enter
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.
- 6 -
3. High /Low temperature Alarm (AH/AL)
When current temperature PV ≥high temperature alarm value AH, high temperature alarm
will be triggered, 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, low temperature alarm will
be triggered, 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, 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 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.
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.
- 7 -
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 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. 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 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.
Buzzer alarm could be dismissed by pressing any key. After faults solved, the system will return
to normal working mode.
HL Alarm
When 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, LCD 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.
-8-
Heating and refrigeration equipment don't work
1, Please make sure the setting value is correct. If thermostat works fine, the
working mode or appear on the LCD.
2, Please check if the loading is contacted reversely to heating or cooling
outlet If your DTC-102 does not operate properly after trying the
troubleshooting steps, please send your questions to our email:
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. If load is larger than 10A, 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 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.
COPYRIGHT© 2019 DIGITEN CO..LTD ALL RIGHTS RESERVED
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