EPH CONTROLS CP4B Battery Powered Programmable Thermostat
Specifications
- Power supply: 2 x AA Alkaline Batteries
- Battery replacement: Once a year
- Contact rating: 8A 230Vac
- Switch output: SPDT Volt Free
- Dimensions: 130 x 99 x 25mm
- Frost protection: Only operational in Off mode
- Pollution degree: Pollution degree 2
Product Usage Instructions
- Mounting & Installation
- Caution! Installation and connection should only be carried out by a qualified person. Only qualified electricians or authorized 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 the section.
- This thermostat must be directly mounted on a wall.
- The mounting height should be 1.5 meters above the floor level.
- The thermostat should be wall-mounted in the room where the heating is to be controlled. The place of installation should be chosen so that the thermostat can measure the room temperature as accurately as possible. Exposure to direct sunlight or other heating/cooling sources should be avoided when the thermostat is mounted.
- Operating Instructions
- 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 temperature setpoint. If the user does not want the thermostat to operate, set the temperature for this time to be a low temperature. The thermostat will turn ON if the room temperature is lower than the setpoint for the current period.
- Factory Default Settings
- The factory default settings provide a starting point for using the thermostat. These settings can be adjusted based on personal preferences and heating requirements.
FAQs
- Q: How often should I replace the batteries?
- A: The batteries should be replaced once a year to ensure uninterrupted operation of the thermostat.
- Q: Can the thermostat be used with any type of heating system?
- A: The thermostat is compatible with most heating systems, but it is recommended to consult with a qualified professional for specific system compatibility.
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CP B
Battery Powered Programmable Thermostat Installation and Operation Guide
CP4B Room Thermostat Installation Instructions
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Factory Default Settings
Contacts: Temperature indicator: Switching differential: In built frost protection: Clock: Keypad lock: Operating mode:
Volt Free °C 0.4°C 5°C – Not adjustable 24 hours Off 5/2 day
Frost Protection
5°C
Frost protection is built into this thermostat. It is set at 5°C and is not adjustable. It will only be activated when the thermostat is in the OFF mode and the room temperature falls below 5°C.
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Specifications
Power supply:
2 x AA Alkaline Batteries
Battery replacement: Once a year
Temp. control range: 5 … 35°C
Ambient temperature: 0 … 45°C
Contact rating:
8A 230Vac
Switch output:
SPDT Volt Free
Dimensions:
130 x 99 x 25mm
Temperature sensor: NTC 100K Ohm @ 25°C
Temperature indication: °C
Switching differential: 0.4°C
Frost protection:
Only operational in Off mode
Pollution degree:
Pollution degree 2
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CP4B Room Thermostat
Wiring Diagram
Internal Wiring Diagram for CP4B
O T ON OFF COM
(OpenTherm)
If mains voltage output is required, 230V must be connected to terminal COM. Important: Do not connect Mains Voltage to OpenTherm®terminals.
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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 temperature setpoint.
If the user does not want the thermostat to operate, set the temperature for this time to be a low temperature. The thermostat will turn ON if the room temperature is lower than the setpoint 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.
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CP4B Room Thermostat
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 the section.
This thermostat must be directly mounted on a wall.
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Mounting & Installation (Continued)
1) The mounting height should be 1.5 metres above the floor level.
2) The thermostat should be wall mounted in the room where the heating is to be controlled.
The place of installation should be chosen so that the thermostat can measure the room temperature as accurately as possible. Exposure to direct sunlight or other heating / cooling sources should be avoided when the thermostat is mounted.
3) Lower the flap at the front of the thermostat. There is a battery compartment located below the buttons. Apply downward pressure to remove the cover.
4) Remove the backplate from the thermostat by inserting a screwdriver into the slots in the battery compartment and pull apart.
5) Fix the backplate to the wall and ensure electrical connections are terminated correctly.
6) Attach the front housing to the backplate and insert the 2 x AA batteries and the thermostat will turn on. Close the battery compartment.
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CP4B Room Thermostat
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CP4B Room Thermostat Operating Instructions
LCD Symbol Description
Current program
Temperature
Day of the week
Day / Month
Current Time (Boost to time)
Battery low symbol
Heating on symbol Keypad lock symbol
Operating mode
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Set point increase
Automatic mode (Back)
Manual mode
Off mode
Program mode Set Date/ Time
Set point decrease Reset button OK confirm button
Boost mode Copy function Holiday mode
AUTO Automatic mode MAN Manual mode OFF Off mode PROG Program mode
TIME Set Date / Time HOL Holiday mode COPY Copy function BOOST Boost mode
Set point increase Set point decrease OK Confirm button Reset button
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CP4B Room Thermostat
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Press the button on the side of the thermostat. `rst no’ will appear on the screen. Press the button. `rst yes’ will appear on the screen. Press the OK button to reset the thermostat. The thermostat will now be reset to the default settings.
Keypad lock and unlock
OFF
To lock the keypad, press and hold the and buttons for 10 seconds.
will appear on the screen. The keypad is now locked.
To unlock the keypad, press and hold the and buttons for 10 seconds.
will disappear from the screen. The keypad is now unlocked.
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Setting the date, time, programming mode and Daylight Savings Time
Press the TIME button once, the year will begin flashing.
Press the or buttons to adjust the year. Press OK .
Press the or buttons to adjust the month. Press OK .
Press the or buttons to adjust the day.
Press OK .
Press the or buttons to adjust the hour. Press OK .
Press the or buttons to adjust the minute. Press OK .
Press the or buttons to adjust from 5/2d to 7d or 24h mode.
Press the or buttons to turn DST (Day Light Saving time) On or Off.
Press the AUTO button or wait 5 seconds and the thermostat will return to normal operation.
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CP4B Room Thermostat
Factory Program Setting
Mon-Fri Sat-Sun
Mon-Fri Sat-Sun
Everyday
P1 06:30 21°C 08:00 21°C
P1 06:30 21°C 08:00 21°C
P1 06:30 21°C
5/2 Day
P2
P3
08:00 10°C
12:00 10°C
10:00 10°C
12:00 10°C
7 Day
P2
P3
08:00 10°C
12:00 10°C
10:00 10°C
12:00 10°C
24 Hour
P2
P3
08:00
12:00
10°C
10°C
5/2d
P4 14:00 10°C 14:00 10°C
P5 17:30 21°C 17:30 21°C
P4 14:00 10°C 14:00 10°C
P5 17:30 21°C 17:30 21°C
P4 14:00 10°C
P5 17:30 21°C
P6 22:00 10°C 23:00 10°C
P6 22:00 10°C 23:00 10°C
P6 22:00 10°C
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Programming Modes
The CP4B Room Thermostat has the following programming modes available:
5/2 Day mode
Programming Monday to Friday as one block and Saturday and Sunday as a second block.
Each block can have 6 different times and temperatures.
7 Day mode
Programming all 7 days individually with six different times and temperatures per day.
24 Hour mode
Programming all 7 days as one block with the same six times and temperatures.
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CP4B Room Thermostat
Adjust the program setting in 5/2 Day mode
Press the PROG button once.
Programming for Monday to Friday is now selected.
Press the or buttons to adjust the P1 time.
Press OK .
Press the or buttons to adjust the P1 temperature.
Press OK .
Repeat this process to adjust P2 to P6 times and temperatures. Press OK .
Programming for Saturday to Sunday is now selected.
Press the or buttons to adjust the P1 time.
Press OK .
Press the or buttons to adjust the P1 temperature.
Press OK .
Repeat this process to adjust P2 to P6 times and temperatures.
Press the AUTO button to return to the automatic mode.
While in PROG Mode pressing the PROG button will jump from P1-P2 etc without changing the temperature.
While in PROG Mode pressing the TIME button will jump to the next day or block of days.
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Copy Function
Copy function may only be used if the thermostat is in the 7d mode. Set the times and temperatures for the day that you wish to copy from in the programming mode. When still on the day press the COPY button. The day of the week that you have selected will be shown with `COPY’ below it. The next day will begin to flash on the top of the screen. Press the button to copy the times and temperatures to that day. Press the button to skip that day. You can copy to multiple days using the button. Press the OK button when copying has been completed.
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CP4B Room Thermostat
Temporary Override
When in AUTO mode, press the or buttons to adjust the temperature setpoint. `OvEr’ will appear on the screen. Press OK or after 5 seconds the thermostat will operate to this temperature setpoint, until the next switching time. To cancel temporary override, press the OFF buttton and then press the AUTO button to return to the automatic mode.
Permanent Override
Press the MAN button to enter the manual mode (Permanent Override), `MAN’ will appear on the screen. Press the or buttons to adjust the temperature setpoint. Press OK or after 5 seconds the thermostat will operate in this mode. To cancel permanent override, press the OFF buttton to turn the thermostat off or press the AUTO button to return to the automatic mode.
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Boost Function
Press the BOOST button, one two or three times. The time that the thermostat will boost to will flash on the screen. Press the OK button. The temperature will now flash. Adjust the boost temperature setpoint by pressing the or buttons. Press the OK button or wait for 5 seconds for the boost to activate. `BOOST TO’ will now be displayed on the screen with the time that the thermostat is activated to, displayed above the text. Press the BOOST button again to deactivate the boost.
If you do not press any button after pressing the boost button, the boost will activate to a default boost setting of 21C.
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CP4B Room Thermostat
Holiday Function
This will switch your heating system off between the start and end times you select .
Press the HOL button, `HOLIDAY FROM’ will appear on screen.
Press the or buttons to adjust the year.
Press OK .
Press the or buttons to adjust the month. Press OK .
Press the or buttons to adjust the day.
Press OK .
Press the or buttons to adjust the hour.
Press OK .
`HOLIDAY TO’ will appear on screen.
Press the or buttons to adjust the year.
Press OK .
Press the or buttons to adjust the month. Press OK .
Press the or buttons to adjust the day.
Press OK .
Press the or buttons to adjust the hour.
Press OK .
The thermostat will now return to the mode it was in before the Holiday settings were entered. To cancel Holiday mode, press the HOL button.
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Backlight mode selection
AUTO
There are two settings for selection. The factory default setting is AUTO.
OFF
The backlight is permanently OFF.
AUTO On pressing any button the backlight stays on for 5 seconds.
To adjust the backlight setting, lower the cover on the front of the unit.
Press the OK button for 5 seconds.
Press either the or buttons to select the OFF or AUTO mode.
Press the OK button.
Battery low warning
When the batteries are almost empty, the symbol will appear on the screen. The batteries must now be replaced or the unit will shut down.
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CP4B Room Thermostat
Replacing the batteries
Lower the flap on the front of the thermostat. There is a battery compartment located below the buttons. Apply downward pressure to remove the cover. Insert the 2 x AA batteries and the thermostat will turn on. Close the battery compartment.
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Installer menu
To access the installer menu, you must hold Prog and OK for 5 seconds.
When in the installer menu, use the , Use , AUTO MAN or OFF to go back a step.
and OK to navigate and select.
P0 1: P0 2: P0 3: P0 4: P0 5: P0 6:
Mode (Normal / Optimum Start / TPI) Hi Lo (Limiting the Thermostat) Hysteresis (Differential) Calibration Frost Protection Exit
Installer menu OpenTherm® Instructions
(Only for use with OT boilers)
P0 6: Setting DHW Temperature P0 7: OpenTherm® Information P0 8: DHOP P0 9: Set OpenTherm® Parameters Exit
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CP4B Room Thermostat
PO 1 Operating Mode (Normal / Optimum Start / TPI)
Nor (Normal Mode) When the thermostat is in Normal mode, the thermostat will try to reach the target temperature after the program changes. Example: 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 06:30am and the room temperature will start to increase then.
OS (Optimum Start Mode) Boiler Plus When the thermostat is in Optimum Start mode, the thermostat will try to reach the target temperature by the start time 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. This will allow the thermostat 10, 15, 20, 25 or 30 minutes to increase the room temperature by 1°C. Ti can be set when OS is selected in the installer menu. 20°C
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PO 1 Operating Mode (Normal / Optimum Start / TPI)
OS (Optimum Start Mode) Boiler Plus
(Continued)
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 if the temperature is increasing too quickly.
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CP4B Room Thermostat
Optimum Start Time (Mins)
Optimum Start Control Graph with Ti = 20 0 20 40 60 80
100 120 140 160 180
9 87654321 Target Temperature Difference °C TTD
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.
Optimum Start Time (Mins)
Optimum Start Time (Mins)
Optimum Start Control Graph with Ti = 15 0 15 30 45 60 75 90
105 120 135
987654321 Target Temperature Difference °C TTD
Optimum Start Control Graph with Ti = 10 0 10 20 30 40 50 60 70 80 90 987654321 Target Temperature Difference °C TTD
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PO 1 Operating Mode (Normal / Optimum Start / TPI)
TPI (Time Proportional & Integral Mode)
When the thermostat is in TPI mode and the temperature is rising in the zone and falls into the Proportional Bandwidth 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 setpoint by too much. It will also turn on if the temperature is falling so it doesn’t undershoot the setpoint which will leave the user with a more comfortable level of heat.
There are 2 settings that will affect the thermostats operation:
1. CYC – No. 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 setpoint temperature. You can select 2/3/6 or 12.
2. Pb – Proportional Bandwidth: 2°C
This value refers to the temperature below the setpoint 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.
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CP4B Room Thermostat
Temp 22°C 21°C 20°C 19°C 18°C 17°C
TPI Control
Setpoint Temperature Proportional Bandwidth
0
20
40
60
80
100 Time Minutes
Heating On
Heating Off
Example: 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 06:30am and the room temperature will start to increase then but will switch itself off before it reaches temperature and allow the room temperature to increase naturally this cycle may begin again if the thermostat isn’t reaching temperature.
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PO 2 Setting high & low limits High 35°C and Low 5°C
This menu allows the installer to change the minimum and maximum temperature range that the thermostat can be set at.
PO 3 Hysteresis HOn and HOff
This menu allows the installer to change the switching differential of the thermostat when the temperature is rising and falling. HOn is the fall in temperature Default 0.4°C. This will allow a fall of 0.4°C from the setpoint before the thermostat turns on again. Hoff is the rise in temperature Default 0.0°C. This will allow the temperature to rise 0°C above its setpoint.
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CP4B Room Thermostat
PO 4 Calibrate the thermostat
This menu allows the installer to re-calibrate the thermostat. The current temperature will be displayed on the screen and can be adjusted by pressing the or buttons .
PO 5 Frost Protection
5°C
This menu allows the installer to activate or de-activate frost protection.
When frost protection is activated the thermostat will switch on the boiler when the temperature drops below 5°C.
PO 6 Exit
This menu allows the installer to return to the main interface. It is also possible to exit the installer menu by pressing , AUTO or MAN OFF whilst in the installer menu.
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PO 6 Setting DHW Temperature
This menu allows the installer to change the DHW temperature of the boiler. The temperature can be set in 0.5°C increments by pressing the
or buttons.
Press the OK button to select the desired temperature.
This menu is only available when the thermostat is connected to OpenTherm® and DHOP is ON (P08 OT installer menu).
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CP4B OpenTherm® Instructions
PO 7 OpenTherm® Information
This menu allows the installer to view information received from the OpenTherm® boiler. It may take a few seconds to load information relating to each parameter. The information that can be shown from the boiler is outlined in the table below.
Displayed on screen Description
Remark
tSEt tFLO trEt
tdH
tFLU tESt nOdU
Target water temp Outlet water temp Return water temp
DHW temperature
Flue gas temperature Outdoor temperature Modulation percentage
This is only visible if DHOP is On (P08 OT Installer menu)
Dependent on boiler
Dependent on boiler
FLOr
Water flow
This is only visible if DHOP is On (P08 OT Installer menu)
PrES
Water pressure
Dependent on boiler
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PO 8 DHOP
This menu allows the installer to activate or de-activate DHW target temperature control from the thermostat. This menu is only available when the thermostat is connected to OpenTherm®
PO 9 Set OpenTherm® Parameters
This menu allows the installer to configure the OpenTherm® parameters. To access the menu please enter the password “08” with the or buttons. Press OK to confirm. The parameters that can be set are outlined in the table below.
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CP4B OpenTherm® Instructions
Parameter HHCH t-1 LLCH t-2
CLI t-3
InFL t-4
Description
Range
Maximum set point heating
45 – 85°C
Minimum set point heating
10 – HHCH°C
This allows users to select different
climatic curves for weather compensation. This only applies to boilers with an outside
0.2 – 3.0
sensor connected.
Influence of room sensor on modulation of the boiler. Recommended value is 10.
0 – 20
Default 85°C 45°C
1.2
10
HHbO t-5
Maximum allowable CH water setpoint. (°C)
ID49 Max ID57 ID49 Min
85°C
Exit
Press OK button to turn back to main interface.
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PO 9 Set OpenTherm® parameters
Climatic Curve
100 80
60
3
2.5
2
1.5 1.2 1
0.8
40
0.6
0.4
0.2
20
20
16
12
8
4
0
-4
-8
-12 -16
Exit
This menu allows the installer to return to the main interface. It is also possible to exit the installer menu by pressing AUTO, MAN or OFF whilst in the installer menu.
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CP4B OpenTherm® Instructions
System architecture
Example A 1 no. Thermostat controlling OT Boiler
CP4B Thermostat
OpenTherm® Boiler
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EPH Controls IE
technical@ephcontrols.com www.ephcontrols.com/contact-us +353 21 471 8440 Cork, T12 W665
EPH Controls UK
technical@ephcontrols.co.uk www.ephcontrols.com/contact-us +44 1933 322 072 Harrow, HA1 1BD
© 2024 EPH Controls Ltd. 2024-04-26_CP4B_DS_PK
Documents / Resources
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EPH CONTROLS CP4B Battery Powered Programmable Thermostat [pdf] User Guide CP B, CP4B, CP4B Battery Powered Programmable Thermostat, CP4B, Battery Powered Programmable Thermostat, Powered Programmable Thermostat, Programmable Thermostat, Thermostat |