EPH CONTROLS CDTP2 Room Thermostat Instruction Manual

EPH CONTROLS CDTP2 Room Thermostat

Product Information

Specifications

• Model: CDTP2
• Product: Room Thermostat
• Power supply / Input: 230VAC
• Power consumption: Operating
• Contacts: Volt Free

Installation Instructions

To install the CDTP2 Room Thermostat, follow the steps below:

1. Make sure the power supply is turned off.
2. Connect the thermostat to the power supply using the provided wiring.
3. Mount the thermostat on the desired location using the appropriate screws.
4. Refer to the wiring diagram for proper connection.
5. Once the thermostat is securely mounted and connected, turn on the power supply.

Product Operating Instructions

Adjusting the Target Temperature

To adjust the target temperature on the CDTP2 Room Thermostat, follow the steps below:

1. Press the “Up” or “Down” button to navigate to the desired temperature.
2. Press the “Enter” button to confirm the new target temperature.

Locking the Keypad

To lock the keypad on the CDTP2 Room Thermostat, follow the steps below:

1. Press and hold the “Menu” button for 5 seconds.
2. Use the “Up” or “Down” button to select “Lock Keypad”.
3. Press the “Enter” button to lock the keypad.

Backlight

The CDTP2 Room Thermostat features a backlight for improved visibility in low light conditions. The backlight will automatically turn on when a button is pressed and will turn off after a few seconds of inactivity.

Mode Selection

The CDTP2 Room Thermostat offers multiple operating modes. To select a mode, follow the steps below:

1. Press the “Menu” button to enter the menu.
2. Use the “Up” or “Down” button to navigate to the “Operating Mode” option.
3. Press the “Enter” button to select the operating mode.

Setting the Date, Time and Programming Mode

To set the date, time, and programming mode on the CDTP2 Room Thermostat, follow the steps below:

1. Press the “Menu” button to enter the menu.
2. Use the “Up” or “Down” button to navigate to the “Date & Time” option.
3. Press the “Enter” button to enter the date and time settings.
4. Use the “Up” or “Down” button to adjust the date and time.
5. Press the “Enter” button to confirm the settings.

Factory Default Settings

• High and Low Temp limitation: Off
• Keypad lock: Off
• Operating mode: Normal
• Temperature indicator: ˚C
• Frost protection: On (5˚C)
• HYS On: 0.4˚C
• HYS OFF: 0.0˚C
• Daylight Saving Time (DST): On

Note

• Frost protection is built into this thermostat.
• It will only be activated when the thermostat is in OFF position and the temperature reaches 5˚C.

Specifications

• Contacts: Volt Free
• Power supply / Input: 230VAC
• Power consumption: Operating <1W
  • Standby: 0.1 mW
• Temperature range: 5…35˚C
• Ambient temperature: 0…45˚C
• Ambient admissible humidity: 5-95%RH
• Contact rating: 7(3)A
• Dimensions: 91 x 91 x 26mm
• Internal Temperature sensor: NTC 100K
• Backlight: White
• IP rating: IP20
• Pollution degree: 2
• Hysteresis (Switching differential): Adjustable from 0 to 1°C
  • 0.1°C increments
• Automatic action: 1C
• Battery: 3VDC Lithium LIR2032

LCD Display

1. Displays when setting target temperature.
2. Displays current room temperature.
3. Displays current day of the week.
4. Displays current / target temperature.
5. Displays when the thermostat is calling for heat.
6. Displays when keypad is locked.
7. Displays when setting HIGH and LOW temperature limit.
8. Displays current time and date.
9. Displays current operating mode.
10. Displays when setting holiday mode.
11. Displays when thermostat is in boost mode.
12. Displays current time program.

Buttons

Wiring

Terminal Connections

• N: Neutral In
• L: Live In
• Terminal 1: OFF – N/C Normally closed connection
• Terminal 2: COM – Common connection
• Terminal 3: ON – N/O Normally open connection

Mounting & Installation

Caution

• Installation and connection should only be carried out by a qualified person.
• Only qualified electricians or authorised service staff are permitted to open the thermostat.
• If the thermostat is used in a way not specified by the manufacturer, its safety may be impaired.
• Prior to setting the thermostat, it is necessary to complete all required settings described in this section.
• Before commencing installation, the thermostat must be first disconnected from the mains.

This thermostat can be mounted in the following ways:

1. Directly mounted on wall
2. To a recessed conduit box
3. To a surface mounting box

1. Remove the thermostat from its packaging.
2. Choose a mounting location so that the thermostat can measure the room temperature as accurately as possible.
   • Mount the thermostat 1.5 metres above the floor level.
   • Prevent direct exposure to sunlight or other heating / cooling sources.
3. Use a philips screwdriver to loosen the screw on the bottom of the thermostat. The thermostat is hinged and can be opened 90 degrees.
4. Wire the thermostat according to the diagram on page 7.
5. Screw the backplate onto a back box or directly to the surface.
6. Close the front housing and tighten the fastening screw on the bottom of the thermostat.

Operating Instructions

Adjusting the Target Temperature

• Press to increase the target temperature from 5-35˚C.
• Press OK or wait 5 seconds. The target temperature is now saved.
• Press to decrease the target temperature from 5-35˚C.
• Press OK or wait 5 seconds. The target temperature is now saved.

Locking the Keypad

• To lock the thermostat, press and hold and for 10 seconds. will appear on the screen. The buttons are now disabled.
• To unlock the thermostat, press and hold and for 10 seconds.
•  will disappear from the screen. The buttons are now enabled.

Backlight AUTO

There are three settings for selection.

• ‘AUt’ The backlight is on for 10 seconds when any button is pressed.
• ‘OFF’: The backlight is permanently off.
• ‘ON’: The backlight is permanently on.

To adjust the backlight setting, press and hold OK for 10 seconds. ‘AUt’ appears on the screen.

• Use and to change the mode between AUTO, ON and OFF.
• Press OK to confirm selection and to return to normal operation.

Mode Selection AUTO

• There are three modes available for selection.
• OFF means the thermostat is permanently off.
• MAN or manual means that the thermostat is permanently on.
• AUTO means that the thermostat will operate according to the times and temperatures that have been pre-programmed.
• Press to change between ‘AUTO’, ‘OFF’ & ‘MAN’.
• The current mode will be underlined on the screen.
• Press again to scroll through the three modes.
• Press OK or wait 5 seconds to confirm.
• When in the Manual mode the thermostat will display the current room temperature and the word ‘MAN’.
• When in the OFF mode the thermostat will display the current room temperature and the word ‘OFF’.
• When in the AUTO mode the thermostat will display the current room temperature, the number of the current program and the word ‘AUTO’.

Setting the Date, Time & Programming Mode

• Press once, the year will begin flashing.
• Press and to adjust the year. Press OK.
• Repeat this for the month, day, hour and minute. Press OK.
• Press and to adjust from 5/2d to 7d or 24h mode. Press OK.
• Press and to turn DST (Day Light Saving time) On or Off.
• Press OK and the thermostat will return to normal operation.

Holiday Mode

• Holiday mode will switch the thermostat off but will have frost protection enabled for the duration of the holiday period.
• Press and hold for 5 seconds.
• ‘HOLIDAY FROM’ will appear on the screen.
• Press , and OK to set time for holiday mode to begin.
• ‘HOLIDAY TO’ will appear on the screen.
• Press , and OK to set time for holiday mode to end.
• The thermostat will switch off for the holiday period.
• Press to cancel the holiday function.

How your Programmable Thermostat works

How your Programmable Thermostat works

• When the thermostat is in the AUTO mode, it will operate according to the times and temperatures that have been programmed. The user can select from 6 different programs per day, each with a time and a temperature.
• There is no OFF time, only a higher and a lower target temperature.
• If the user wants the thermostat to be OFF at a certain time, set the temperature for this time to be low. The thermostat will turn ON if the room temperature is lower than the target temperature for the current period.
• Example: If P1 is set to be 21˚C at 6am, and if P2 is set to be 10˚C at 8am, the thermostat will look for the temperature to be 21˚C between 6am and 8am.

Factory Program Setting

5/2d

Programming Modes

The CDTP2 Room Thermostat has the following programming modes available:

• 5/2 Day mode: Programing Monday to Friday as one block and Saturday and Sunday as a 2nd block.
  • Each block can have 6 different times and target temperatures.
• 7 Day mode: Programming all 7 days individually with different times and target temperatures.
• 24 Hour mode: Programming all 7 days as one block with the same times and target temperatures.

If 7 D mode is selected, you can program each day of the week with 6 individual times and temperatures.
If 24H mode is selected, you can only program each day of the week with the same 6 times and temperatures.

Adjust the Program Setting in 5/2 Day Mode

• Press twice.
• Programming for Monday to Friday is now selected.
• Press and to adjust the P1 time. Press OK.
• Press and to adjust the P1 temperature. Press OK.
• Repeat this process to adjust P2 to P6 times & temperatures.

Programming for Saturday to Sunday is now selected

• Press and to adjust the P1 time. Press OK.
• Press and to adjust the P1 temperature. Press OK.
• Repeat this process to adjust P2 to P6 times & temperatures. Press OK.
• Press to return to automatic mode.
• While in programming mode, pressing will jump to the next day (block of days).

Temporary Override

• When in AUTO mode, press or to adjust the target temperature.
• Press OK or wait 5 seconds, the thermostat will operate to this new target temperature until the next switching time.

Permanent Override

• Press to select ‘MAN’ or manual mode (Permanent Override).
• Press OK.
• Press or to adjust the target temperature.
• Press OK or wait 5 seconds, the thermostat will operate to this target temperature.
• To cancel permanent override, press until the ‘AUTO’ or ‘OFF’ mode are selected.

Boost Function

• The thermostat can be boosted to a specific temperature for 1, 2 or 3 hours while the thermostat is operating in all modes except for holiday mode.
• Press 1, 2 or 3 times, the end time of the boost program will appear flashing on the screen.
• If you press OK the temperature will now flash. You can adjust the target temperature by pressing the or .
• Press OK or wait for 5 seconds for the boost to activate.
• ‘BOOST TO’ will now be displayed on the screen with the end time for the boost program.
• Press again to deactivate the boost, the thermostat will revert to its previous operating mode.

Menu Function

• This menu allows the user to adjust additional functions.
• To access the menu, press and hold & OK together for 5 seconds.

P01 Operating Mode

P01 Operating Mode (Normal / Optimum Start / TPI)

• There are three settings for selection, Normal, Optimum Start or TPI mode. The default setting is Normal.
• Press and hold & together for 5 seconds.
• ‘P01’ will appear on the screen.
• Press OK to select.

Use and to select between:

• nOr (Normal mode)
• OS (Optimum start mode)
• tPi (Time proportional integral mode)
• Press OK to confirm the mode.

Normal Mode (Nor)

• When the temperature falls below the target temperature, will appear and the thermostat will activate the demand for heat.
• When the temperature rises above the target temperature, will disappear, and the thermostat will cancel the demand for heat.

Optimum Start Control (OS)

When the thermostat is in Optimum Start mode, it will try to reach the target temperature by the start of the next switching time. This is done by setting the Ti (time interval) on the thermostat in this menu to 10, 15, 20, 25 or 30 minutes. This will allow the thermostat 10 to 30 minutes to increase the room temperature by 1°C. To achieve the target temperature when the program starts, the thermostat will read:

1. The Room Temperature (RT)
2. The Setpoint Temperature (ST)
3. The Target Temperature Difference (TTD) is the difference between the setpoint temperature and the room temperature.

The time (in minutes) that it will take to overcome (TTD) is called Optimum Start Time (OST) and its maximum value is 3 hours = 180 mins. This is subtracted from the start time. As the temperature increases the thermostat will recalculate the OST.

Example when Ti = 20

• Program 1 on the thermostat is 21°C for 06:30am and the room temperature is 18°C.
• The thermostat will start the heating at 05:30am to reach 21°C for 06:30am @ Ti=20.

Example when Ti = 10

• Program 1 on the thermostat is 21°C for 06:30am and the room temperature is 18°C.
• The thermostat will start the heating at 06:00am to reach 21°C for 06:30am @ Ti=10.

Time Proportional Integral Mode (TPI)

When the thermostat is in TPI mode and the temperature is rising in the zone and falls into the Proportional Bandwith section, TPI will start to affect the thermostats operation. The thermostat will turn on and off as it gains heat so that it doesn’t overshoot the target by too much. It will also turn on if the temperature is falling so it doesn’t undershoot the target which will leave the user with a more comfortable level of heat. There are 2 settings that will affect the thermostats operation.

1. The number of heating cycles per hour.
2. The Proportional Bandwith.

CyC – Number of Heating Cycles per hour 6 Cycles

• This value will decide how often the thermostat will cycle the heating on and off when trying to achieve the target temperature. You can select 2/3/6 or 12.

Pb -Proportional Bandwith 2°C

• This value refers to the temperature below the target at which the thermostat will start to operate in TPI control.
• You can set this temperature from 1.5°C to 3.0°C in 0.1°C increments.
• Once TPI mode is selected, ‘CYC’ and ‘06’ will appear on the screen.
• Use and to select from 2, 3, 6 or 12.
• Press OK to confirm.

P Band’ and ‘2.0’ will appear on the screen

• Use and to select from 1.5 to 3.0.
• Press OK to confirm.
• Press to return to normal operation.

P02 Setting High & Low Limits Hi 35°C Lo 5°C

This menu allows the installer to change the minimum and maximum temperatures that the thermostat can be set at.
To access this setting, press and hold & OK together for 5 seconds.

• ‘P01’ will appear on the screen.
• Press until ‘P02’ appears on the screen.
• Press OK to select.
• ‘HI LIMIT’ will appear, the temperature will begin to flash.
• Use and to select the high limit for the thermostat.
• Press OK to confirm.
• ‘LOW LIMIT’ will appear, the temperature will begin to flash.
• Use and to select the low limit for the thermostat.
• Press OK to confirm.
• Press to return to normal operation.
• When this setting is enabled, ‘LIMIT’ will appear permanently on the screen.

P03 Hysteresis HOn & HOFF HOn 0.4°C HOFF 0°C

• This menu allows the installer to change the switching differential of the thermostat when the temperature is rising and falling.
• If ‘HYS ON’ is set at 0.4˚C and the setpoint is 20˚C, then the thermostat will switch on when the temperature drops below 19.6˚C.
• If ‘HYS OFF’ is set at 0.2˚C and the setpoint is 20˚C, then the thermostat will switch off when the temperature reaches 20.2˚C.
• To access this setting, press and hold & OK together for 5 seconds.
• P01’ will appear on the screen.
• Press until ‘P03’ appears on the screen. Press OK.
• ‘HOn’ will appear on the screen and the differential temperature will begin to flash.
• Use & to select the ‘HOn’ temperature, press OK to confirm.

HOFF’ will appear on the screen and the differential temperature will begin to flash.

• Use & to select the ‘HOFF’ temperature.
• Press OK to confirm.
• Press to return to normal operation.

P04 Calibrate

This menu allows the installer to calibrate the temperature of the thermostat. To access this setting, press and hold & OK together for 5 seconds.

• ‘P01’ will appear on the screen.
  • Press until ‘P04’ appears on the screen.
  • Press OK to select.
• ‘CALI’ and the actual temperature will appear on the screen.
  • Press and to calibrate the temperature.
  • Press OK to confirm the temperature.
  • Press to return to normal operation.

Resetting the Thermostat

• To reset the thermostat to factory settings, locate the reset button on the left hand side of the thermostat.
• Press the reset button and release it.
• ‘RST’ will appear and ‘NO’ will flash on the screen.
• Press .
• ‘YES’ will flash on the screen.
• Press OK to confirm.
• The thermostat will restart and revert to its factory settings.

Contacts

EPH Controls IE

• technical@ephcontrols.com
• www.ephcontrols.com/contact-us
• T:  +353 21 471 8440

EPH Controls UK

• technical@ephcontrols.co.uk
• www.ephcontrols.co.uk/contact-us
• T: +44 1933 322 072

© 2024 EPH Controls Ltd.

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