EPH Controls CP4B Operating instructions

Installation and Operation Guide
Battery Powered Programmable Thermostat
CP4B

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Installation Instructions 2
3
Factory Default Settings
3
4
Specications
5
Wiring Diagram
6
How your programmable thermostat works
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13
Operating Instructions
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15
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Table of contents
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Frost Protection
Mounting & Installation
Resetting the thermostat
Keypad lock and unlock
Setting the date, time, programming mode and daylight saving time
Button Description
LCD Symbol Description
Adjust the program setting in 5/2 Day mode
Copy Function
Temporary Override
Permanent Override
Boost Function
Factory Program Setting
Programming Modes

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24
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Installer menu
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31
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31
21
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Frost Protection
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23
TPI
PO 2 Setting high & low limits
PO 3 Hysteresis H On and H O
Optimum Start
Normal
PO 1 Operating Mode
Holiday Function
Battery low warning
Backlight mode selection
Replacing the batteries
PO 4 Calibrate the thermostat
PO 5 Frost Protection
PO 6 Exit
Installer menu - OpenTherm
32
PO 6 Setting DHW temperature
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34
PO 8 DHOP
34
PO 9 Set OpenTherm® parameters
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PO 7 OpenTherm® Information
Exit
System Architecture

CP4B Room Thermostat
Installation Instructions

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RFRP-OT Room Thermostat
Factory Default Settings
Contacts: Volt Free
Temperature indicator: ˚C
Switching dierential: 0.4˚C
In built frost protection: 5˚C - Not adjustable
Clock: 24 hours
Keypad lock: O
Operating mode: 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.

4CP4B Room Thermostat
Specications
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
Dimensions: 130 x 99 x 25mm
Temperature sensor: NTC 100K Ohm @ 25˚C
Temperature indication: ˚C
Switching dierential: 0.4˚C
Frost protection: Only operational in O mode
Pollution degree: Pollution degree 2

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If mains voltage output is required, 230V must be connected to
terminal COM.
Important: Do not connect Mains Voltage to OpenTherm®terminals.
Wiring Diagram
ONO T OFF COM
(OpenTherm)
Internal Wiring Diagram for CP4B

6CP4B Room Thermostat
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 dierent 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.
How your programmable thermostat works

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Mounting & Installation
Caution!
Installation and connection should only be carried out by a qualied
person.
Only qualied electricians or authorised service sta are permitted to
open the thermostat.
If the thermostat is used in a way not specied 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.

8CP4B Room Thermostat
1) The mounting height should be 1.5 metres above the oor 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 ap 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.
Mounting & Installation (Continued)

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1 2
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100
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5 6

CP4B Room Thermostat
Operating Instructions

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LCD Symbol Description
Operating mode
Current program
Day / Month
Day of the week
Temperature
Battery low symbol
Heating on symbol
Keypad lock symbol
Current Time
(Boost to time)

12 CP4B Room Thermostat
Button Description
Automatic mode Set Date / Time Set point increase
Manual mode Holiday mode Set point decrease
O mode Copy function Conrm button
Reset buttonProgram mode Boost mode
AUTO TIME
MAN HOL
OFF COPY OK
PROG BOOST
Manual
mode
O mode
Program mode Set Date/ Time
Holiday mode
Copy function
Boost mode
Automatic
mode
(Back)
OK conrm button
Set point increase
Set point decrease
Reset button

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RFRP-OT Room Thermostat
Resetting the thermostat
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.
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.

14 CP4B Room Thermostat
Press the TIME button once, the year will begin ashing.
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 O.
Press the AUTO button or wait 5 seconds and the thermostat will return to
normal operation.
Setting the date, time, programming mode and
Daylight Savings Time

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Factory Program Setting 5/2d
5/2 Day
P1 P2 P3 P4 P5 P6
Mon-Fri
06:30 08:00 12:00 14:00 17:30 22:00
21˚C 10˚C 10˚C 10˚C 21˚C 10˚C
Sat-Sun
08:00 10:00 12:00 14:00 17:30 23:00
21˚C 10˚C 10˚C 10˚C 21˚C 10˚C
7 Day
P1 P2 P3 P4 P5 P6
Mon-Fri
06:30 08:00 12:00 14:00 17:30 22:00
21˚C 10˚C 10˚C 10˚C 21˚C 10˚C
Sat-Sun
08:00 10:00 12:00 14:00 17:30 23:00
21˚C 10˚C 10˚C 10˚C 21˚C 10˚C
24 Hour
P1 P2 P3 P4 P5 P6
Everyday
06:30 08:00 12:00 14:00 17:30 22:00
21˚C 10˚C 10˚C 10˚C 21˚C 10˚C

16 CP4B Room Thermostat
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 dierent times and
temperatures.
7 Day mode Programming all 7 days individually with
six dierent times and temperatures per day.
24 Hour mode Programming all 7 days as one block with the
same six times and temperatures.
Programming Modes

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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.
Adjust the program setting in 5/2 Day mode

18 CP4B Room Thermostat
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 ash 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.