① The output signal of a room thermostat is ON or OFF according to changes of room temperature ② The power supply to a motorized valve is ON or OFF according to a signal output the room thermostat. ③ When power is ON the valve is opened and hot or cold water flows to control the room temperature When power is OFF the valve is closed and the supply of hot/or cold water is stopped to control the room temperature ■ HOW TO CONTROL THE VALVE ROOM THERMOSTAT ① A signal output of a room thermostat is ON or OFF according to changes of room temperature. ② According to the output signal power of a boiler is ON or OFF and the boiler starts or stops operating to control the temperature ■ HOW TO CONTROL THE HEATER PIPE MOTOR VALVE 1 Rev.0( ) HEATER MODEL : ED-300 SERIES PROGRAMMABLE TYPE >>DIGITAL ROOM THERMOSTAT PROGRAMMABLE ED ROOM THERMOSTAT 1. APPLICATION. The ED-300 thermostat based on the auto-tuning method has a special program that can reserve the weekly operation of the heating / or cooling systems. It is designed to maintain the room temperature at the set degree by sending a signal output to an actuator to open or close the hot water valve when the room temperature rises or lowers than the set temperature. It can be applied for ON/OFF control of heating systems such as district heating, a boiler, a heating fan and a high thermal heater and air-conditioning system etc.

■ Input Power : AC 220V/50~60 Hz ■ Max Load Current : Resistance Load 10A ■ Tempe Range : 5 ℃ ~ 35 ℃ ■ Temp Setting Scale : 0.5 ℃ /Step ■ ON-OFF Differential: 1 ℃ Max. ■ Temp Indication Accuracy : 1.0 ℃ Max ■ Ambient Temp : 5 ℃ ~ 45 ℃ ■ Case Material : Fire-resistant ABS FRONT REAR UNIT : mm ■ User can select Celsius or Fahrenheit when ordering. ■ A weekly time schedule program is built-in. ■ It is programmed to protect a boiler from being frozen to burst in winter. ■ It is designed to memorize the set temperature at the time of a power failure. Users do not need to reset it when power returns. ■ Easy to set the temperature by dialing a knob. ■ Easy to check the temperature on a wider display window. 3. SPECIFICATION 4. DIMENSION 2. FEATURES

1. MODE OF GENERAL OPERATION When a MODE button is pressed a symbol disappears on a display window and the thermostat returns to a mode of general operation to control the heating or cooling system as usual according to a signal output to be transmitted from the room thermostat when the room temperature differs from the set temperature. ( 1 ) POWER-ON When the power supply is ON after installation the current time, temperature and a day of the week are displayed on a window. ( 2 ) HOW TO CHECK THE CURRENT SET TEMPERATURE When a knob is dialed to left or right a little the current set temperature is shown on a window. ( 3 ) HOW TO CHANGE THE SET TEMPERATURE Dial a knob to left or right and stop dialing when reaching the desired digits. Then, the set digits will blink 3 times. It means that the set temperature has been changed. ( 4 ) OUTGO MODE When the OUTGO switch is pressed the OUTGO lamp is ON. It means that OUTGO mode has been set to protect a boiler from being frozen to burst in case that the room temperature becomes below 15 ℃. ( 5 )TERMINATION OF OUTGO MODE Press the OUTGO button again to terminate the set mode. 3 Rev.0( ) 5. HOW TO SET A MODE OF OPERATION

2. TIME( PROGRAM ) MODE OPERATION ■ Users can program their time schedules at this mode only. ■ At this mode the heating and cooling systems are operated according to the weekly program to be set by a user during a week. ■ Press the MODE button to enter into a TIME mode. Then, a time symbol is displayed on a window. Now, users can program the weekly operation time as they desire. ■ How to program Programming must be done in the following sequence. Sequence 1 : To set a working day / or a public holiday Step 1. Press a SET button a little longer than 3 second first. Then Monday ~ Sunday ( Mo, Tu, We, Th, Fr, Sa, & Su) all days of a week) are displayed on a window side by side. 1 day among them and a symbol A (a working day) or R (a holiday) blink together. Step 2. Dial a knob to select a day( Ex: Mon). If you want to set this Monday A (working day) or R (a holiday) press the OUTGO button to choose A or R. Now, Monday is set as a working day or a holiday. Dial a knob to select a day( Ex :Tue). If you want to set this Tuesday A (working day) or R (a holiday) press a OUTGO button to choose A or R. Now, Tuesday is set as a working day or a holiday. Wednesday,Thursday and Friday can be set in the same manner. The above each step shall be proceeded within 10 seconds. If 10 seconds is over after one step (Ex: Step 1,Mon) the window returns to the initial TIME mode automatically. Then, a user can proceed the setting after coming back to Step 1 again by pressing the SET button 3 seconds. In this case a user does not need to set the value for Monday again because the value of Monday has already been saved inside in the first Step 1. So, he can start setting the value for Tuesday ~ Friday in Step 1 continuously according to the above procedure. Step 3. Press the SET button again for final saving. Now, the above setting value is saved and the first sequence WAKE is displayed on a window automatically. The initial setting when delivering from our factory : Monday ~Thursday are set as A ( working days) and Saturday ~ Sunday are set as R ( holidays).

Sequence 2 : To set the WAKE hour and the room temperature for working days (Mon ~Fri ). Step 1: A day of a week( Mon ~ Fri), a symbol A (working day) and the hour unit blink together. (The initial time is set as 06:00 am when delivering from our factory.) Step 2 : Dial a knob from side to side to set the hour unit and press a OUTGO button for saving. Then, the minute unit blinks. : Dial a knob again to set a minute and press the OUTGO button again for saving. Then, the temperature digits blink. : Dial a knob to set the temperature and press the OUTGO button again for final saving. Now, a wake hour and the room temperature for Monday ~ Friday are set as one lump package and a next sequence LEAVE is displayed on a window automatically. Sequence 3 : To set the LEAVE hour and the room temperature for working days ( Mon ~ Fri). Step 1 :The initially set hour is displayed and the hour unit only blinks. (The initial hour is set as 08:00 am when delivering from our factory.) Step 2 : Dial a knob from side to side to set the hour unit and press a OUTGO button for saving. Then, the minute unit blinks. : Dial a knob again to set the minute unit and press the OUTGO button again for saving. : Then, the temperature digits blink. : Dial a knob to set the temperature and press the OUTGO button again for final saving. Now, the LEAVE hour and the room temperature for Monday ~ Friday are set as one lump package and a next sequence RETURN is displayed on a window automatically. Sequence 4 : To set the RETURN hour and the room temperature for working days ( Mon ~ Fri). Step 1:The initially set hour is displayed and the hour unit only blinks. (The initial hour is set as 06:00 pm when delivering from our factory.) Step 2 : Dial a knob from side to side to set the hour unit and press a OUTGO button for saving. Then, the minute unit blinks. : Dial a knob again to set the minute unit and press the OUTGO button again for saving. Then, the temperature digits blink. : Dial a knob to set the temperature and press the OUTGO button again for final saving. Now, the RETURN hour and the room temperature for Monday ~ Friday are set as one lump package and a next sequence SLEEP is displayed on a window automatically.

Sequence 5 : To set the SLEEP hour and the room temperature for working days ( Mon ~ Fri). Step 1:The initially set hour is displayed and the hour unit only blinks. (The initial hour is set as 10:00 pm when delivering from our factory.) Step 2 : Dial a knob from side to side to set the hour unit and press a OUTGO button for saving. :Then, the minute unit blinks. :Dial a knob again to set the minute unit and press the OUTGO button again for saving. :Then, the temperature digits blink. :Dial a knob to set the temperature and press the OUTGO button again for final saving. Now, the SLEEP hour and the room temperature for Monday ~ Friday are set as one lump package and a next sequence WAKE for holidays ( Sat ~Sun ) is displayed on a window. Sequence 6 : To set the WAKE hour and the room temperature for holidays( Sat ~Sun ). Step 1 : Saturday or Sunday, a holiday symbol R and the set hour are displayed on a window together. :The initially set hour only blinks. (The initial hour is set as 06:00 am when delivering from our factory.) Step 2 : Dial a knob from side to side to set the hour unit and press a OUTGO button for saving. : Then, the minute unit blinks. :Dial a knob again to set the minute unit and press the OUTGO button again for saving. :Then, the temperature digits blink. :Dial a knob to set the temperature and press the OUTGO button again for final saving. Now, the WAKE hour and the room temperature for Saturday ~ Sunday are set as one lump package and a next sequence LEAVE is displayed on a window. Sequence 7 : To set the LEAVE hour and the room temperature for holidays ( Sat ~ Sun ) Step 1 :The set hour is displayed and the hour unit only blinks. (The initial time is set as 08:00 am when delivering from our factory.) Step 2 :Dial a knob from side to side to set the hour unit and press a OUTGO button for saving. Then, the minute unit blinks. :Dial a knob again to set the minute unit and press the OUTGO button again for saving. Then, the temperature digits blink. :Dial a knob to set the temperature and press the OUTGO button again for final saving. Now, the LEAVE hour and the room temperature for Saturday ~ Sunday are set as one lump package and a next sequence RETURN is displayed on a window automatically.

Sequence 8 : To set the RETURN time and the room temperature for holidays ( Sat ~ Sun). Step 1:The set hour is displayed and the hour unit only blinks. (The initial time is set as 06:00 pm when delivering from our factory.) Step 2.:Dial a knob from side to side to set the hour unit and press a OUTGO button for saving. Then, the minute unit blinks. :Dial a knob again to set the minute unit and press the OUTGO button again for saving. Then, the temperature digits blink. :Dial a knob to set the temperature and press the OUTGO button again for final saving. Now, the RETURN hour and the room temperature for Saturday ~ Sunday are set as one lump package and a next sequence SLEEP is displayed on a window. Sequence 9 : To set the SLEEP time and the room temperature for holidays ( Sat ~ Sun). Step 1 :The set hour is displayed and the hour unit only blinks. (The initial time is set as 10:00 pm when delivering from our factory.) Step 2 :Dial a knob from side to side to set the hour unit and press a OUTGO button for saving. Then, the minute unit blinks. :Dial a knob again to set the minute unit and press the OUTGO button again for saving. Then, the temperature digits blink. :Dial a knob to set the temperature and press the OUTGO button first and press the MODE one time for final saving. Now, the SLEEP hour and the room temperature for Saturday ~ Sunday are set as one lump package. Sequence 10: To come back to the initial TIME mode operation after setting the value for each function while carrying out the sequences 2 ~ 9. Method 1:Press the OUTGO button first, MODE button next after setting the values. Then, the set values are saved and the TIME mode (Time, Temperature, a day of week, and A or R )is displayed on a window. In this case, the set values are not saved at all if the MODE button only is pressed even after returning to the initial TIME mode. So, a user should press the OUTGO and MODE buttons one by one to store the set value. Method 2:If a user spends 10 seconds after setting the values. Then the TIME mode is displayed on a window automatically. N O T E : For all sequences 1 ~ 9 : The hour unit can be calibrated by an hour : The minute unit can be calibrated by 5 minute. : The temperature digits can be calibrated by 0.5 ℃ : AM and PM can be changed as desired (See below)

: The above each step shall be proceeded within 10 seconds. If 10 seconds is over after one step (Ex: Step 1,Mon) the window returns to the initial TIME mode automatically. Then, a user can proceed the setting after coming back to Step 1 by pressing the SET button longer than 3 seconds again. : Go back to the first sequence, Step 1,and follow the procedure from beginning when a user needs to change the set value of a a certain function. ■ HOW TO SET THE HIGH AND LOW TEMPERATURE RANGE A user can set the highest and lowest temperatures as he desires within the range of the temperature, 15 ~ 35 ℃ (Celsius) and 59 ~ 95 ° F (Fahrenheit). Step 1 : Press the OUTGO and MODE buttons together at the same time. Then the temperature digits blink - The initial digits are set as 35 ℃ ( 95 ° F ) when delivering from our factory. Step 2 : Dial a knob to select the digits and press the OUTGO button to finish the setting. Then, the set value is saved the initial TIME mode is displayed on a window again. In case that a user spends 10 seconds without pressing the OUTGO mode button finally the set value is saved and the initial TIME mode is displayed on a window automatically. ■ HOW TO SET THE CURRENT HOUR AND A DAY OF A WEEK This setting is available at a mode of general operation and TIME (Programmable) mode both. To set an hour : Press the SET and OUTGO buttons both at the same time. : Then the minute unit blinks. : Dial a knob to set the desired hour. : Press the OUTGO button to finish the setting finally. : Then, the set hour is saved and the next step is connected automatically. To set a day : The initially set day of a week, Mo ( Monday ) blinks. of a week : Dial a knob to select a day of a week to be matched with today. (Ex : If today is 29 th of June a day of a week must be set as Thursday.). : Press the OUTGO button to finish the final setting. Then, the set value is saved and TIME mode is displayed on a window again.