USER & ENGINEER
INSTRUCTION
MANUAL
BENSON
CP4
USER INSTRUCTIONS
CONTENTS PAGE
SUBJECT PAGE No.
Contents Page ...................................................................... 1
CP4 Basic Setting Guide ................................................... 2-3
Standard Terms .................................................................... 4
Normal RUN Mode ................................................................ 4
Override ................................................................................. 5
Standby Mode ........................................................................ 5
Date ..................................................................................... 5
Heater Lockout and Reset ..................................................... 5
Summer Fan .......................................................................... 6
Program Mode
Temperature setting ............................................................... 6
Data Setting ........................................................................... 6
Time Setting ........................................................................... 7
Code Setting .......................................................................... 7
Holidays ................................................................................. 8
System Settings
Override (Maximum) Setup .................................................... 9
Optimisation Setup ................................................................. 9
Code Setting .......................................................................... 9
Configure - Control Type ........................................................ 9
Configuration / Setup
Configure Control Setup (On/Off): Purge Option, Double
Ignition, Proving Switch .................................................... 10
Configure Control Setup (High/Low): High Flame Boost,
High/Low Differential, Double Ignition, Proving Switch .... 11
System Wide Setup
Fan Setup ............................................................................... 12
Sensor Calibration .................................................................. 12
Service Mode ......................................................................... 12
Service Alarm ......................................................................... 12
Resetting Service Alarm ......................................................... 13
System Reset ......................................................................... 13
Technical Details
Specification / Fuse Rating .................................................... 13
Sensor/Input Connections ...................................................... 14
Please consult the manual shipped with the heater for detailed wiring connections.
1
CP4 BASIC SETTING GUIDE
INITIAL SCREEN ON RECEIPT. The display will show either of the following:
DAY: TIME: INITIAL TEMP SETTING HEAT OFF or
DAY: TIME: and the letters N/C HEAT OFF
At this point the control will require calibration. (A separate thermostat showing the actual temperature would
be an advantage for the calibration).
Calibrate by the following method:
Press PROG and key in the engineers code (6343) and press ENTER.
The display shows 4 options - press 4 (SETUP). A further 4 options are displayed. Press 3 (SENSOR).
Display shows INTERNAL SENSOR N (0) Y (1) press 1 and ENTER. Screen shows calibrated INTERNAL XX
and a temperature, key in the correct temperature and press ENTER. The screen will now display calibrate
N/C REMOTE 1 XX (calibration of this screen is only required when using a remote sensor) for normal use with
internal sensor press RUN three times and screen will indicate ADJUSTING SETUP PLEASE WAIT.
The display will then indicate:
DATE: TIME: TEMP HEAT OFF
INITIAL SCREEN SETUP END USER
The end user programme settings can now be programmed as follows:
Press PROG key in operators code (0000) and press ENTER to access the options screen.
TEMPERATURE SETTING
To enter the temperature required the display shows 4 options - press 1 TEMP and set the temperature required.
Press ENTER. The display shows FROST PROTECTION 1 ON 2 OFF. If frost protection is required press 1.
Screen shows SET NIGHT PERIOD TEMP (04°C) this setting can be changed if required. If not press ENTER
to return to the 4 options screen.
OPERATING TIMES
To enter the times that the heater will be required to operate there are 3 ON/OFF times per day available if
required. The 24 hour clock system is used. If a mistake is made press RUN to return to options screen.
On the options screen press 2 DATA and the screen will display MON PERIOD 01 S HH:MM E HH:MM.
Key in the required start time (S), e.g. 0700 and press ENTER. Key in end time (E), e.g. 1630 and press ENTER.
The screen will now display DAY PERIOD 02 and a further switching time can be programmed in if required.
Press ENTER and DAY PERIOD 03 will be displayed. IF NEITHER OF THE PERIODS 02/03 ARE REQUIRED
AFTER PERIOD 01 just press ENTER for those periods.
The screen will now show TUE PERIOD 01. If the switching time is the same for Tuesday as it was for Monday,
press the PROG (copy) button and the programme will automatically copy the information over. It will do this for
all the days of the week. If alternative times are required they can be keyed in. If not, press ENTER for that day.
2
DAY AND DATE
On 4 options screen press 3 SYSTEM then press 1 SYSTEM TIME key in the correct time and press ENTER.
The screen will change to DATE. Key in date and press ENTER. Screen will display SET DAY OF WEEK
1=MON 7=SUN, press the correct number for the day of the week. Screen will change to 2 option screen, press
RUN twice to return to main display screen.
SWITCH OFF HEATER
To switch OFF the heater at any time during normal programmed operation press OVER/STANDBY button then
press 2 STANDBY MODE. If the heater is operating, the burner will shut down and the heater will go through
its shut down sequence and switch OFF.
To switch the heater ON press OVER/STANDBY button then press 2 STANDBY MODE the heater will switch
back to normal operation.
SYSTEM OVERRIDE
To switch the heater ON/OFF for a short period outside programmed operating times press OVER/STANDBY
button then press 1 OVERRIDE MODE. This will show 2 options, OVERRIDE 1 On 2 OFF.
If heater is OFF as it is outside its timed programme and you wish to run the heater for a short period press 1
and enter the number of hours you wish to operate in override mode (the default setting is 4 hours but this can
be changed through the engineers settings options).
When set, the display will flash periodically and count down the override time. The same operation can be done
by press 2 if the heater is ON and you wish to turn it off for a specific period.
Before returning to the normal operating period ensure that the override time entered in the overrun period is
deleted.
3
Standard Terms
Self Learning Optimisation is a system whereby the Benson CP4 will automatically calculate the start up time
to ensure the building is up to temperature for the programmed switching time. It does this by monitoring the
internal temperature readings, so that for example, in milder weather conditions heat up times are reduced - thus
saving energy.
Preheat is the number of hours the control can come on before the programmed switching time (when in
optimising mode) This is setup under the Engineers code and can be set to no more than 8 hours.
Rate of Change is the time it takes to raise the building by 1°C. The factory default for this setting is 20 minutes
but the control will automatically adjust this according to the fabric of the building.
Override Using the override button on the Benson CP4 keypad allows the user to override the zone for a
selected number of hours, to allow for unscheduled use of the system. A maximum can be set to stop users
entering long override periods.
Switching period status:
• Day is when the control is being controlled to an actual switching time (For example between 07.00 -
17.00 the control would be in a DAY condition) Outside of these hours the control would be in a night
condition.
• Night is when no switching times have been programmed. At these times the control is set back to the
night temperature or frost protection.
Heater Lockout and Reset is standard on the CP4 and allows for a signal to be fed into the CP4 from the heater
when the heater goes to lockout. Once the fault on the heater has been rectified a reset signal can be sent
to the heater resetting lockout status.
Normal RUN Mode is when the control is operating normally and is not being programmed (ie showing the
time and date screen). It is important to remember that when any alterations have been made to the CP4’s
program, the RUN button is pressed to return the control to the RUN mode.
Normal RUN Mode
There is one main Normal (Run) mode screen, and one Info screen on the Benson CP4. These are explained
below;
On/Off RUN mode screen
This screen shows the time, actual temperature and the heat relay status (On or Off)
High/Low RUN mode screen
This screen shows the time, actual temperature and the heat status of both high and low flame
Pressing the Information button followed by option 1 will show the following display:
This display shows the target temperature along with the
switching period status.
4
FRI 07.58 23°C
HEAT OFF
FRI 07.58 23°C
LOW ON HIGH OFF
TARGET TEMP : 21°C
TIME CLOCK: DAY
Override
The Benson CP4 can be overridden into a day or night condition to allow for any unscheduled operation of the
system. The maximum time that the unit can be overridden will have been set by the installer.
To program an override period
• From the Normal RUN mode
Press the Override button and enter your security code if required.
Mon 13.06 20°C
Time Clock: DAY
• Then choose 1) to enter the override mode
• Then select either 1 or 2 to override the zone
ON(1) or OFF(2)
• You are now prompted to enter the length of the override period.
• Should the zone be above temperature, the control will show the
following screen. Remember that the override function only overrides
time and not temperature. This error message will also appear if the
override time programmed exceeds the maximum override setting
• The status screen then indicates the zone has been
put into an override condition.
!
To cancel an override period repeat the steps above, choosing 2 for
OFF and then reduce the length of the override period to 00
1> OVERRIDE MODE
2> SUMMER MODE
OVERRIDE TO
1> ON or 2> OFF
OVERRIDE SETTING
MAXIMUM (04) :03
** WARNING**
INVALID DATA
Mon 13.06 20°C
Status: OVERRIDE
Standby Mode
In order to put the CP4 into Standby mode, press the Override/Standby button and select 2 for Standby.
The control is then put in to the Standby mode, which means that the temperature is controlled to the night
setback setting.
To cancel repeat the above operation.
1> Override
2> Standby
Date
To display the current time and date:
• Press INFO
• Press 2 for date.
• To cancel, repeat the above operation.
12.13.49
SAT 11-12-02
Heater Lockout/Reset
A supply can be wired into the Benson CP4 from the heater lockout connection allowing for remote indication of
a fault. Once the fault on the heater has been rectified, pressing RESET on the keypad sends a reset signal
to the heater to clear the lockout status. This feature is highly beneficial on heaters installed out of reach.
Heater Reset (No lockout indication)
On heaters where there is no heater lockout indication, the Benson CP4 can be used to send a reset signal.
To send a Reset signal in the case:
• Press the Info/Reset button
• Press 3 for Reset
The reset relay will be energised for a second.
5
1> INFORMATION 2>DATE
3> LOCKOUT RESET
Manual Summer Fan
Providing the installed heaters are equipped with a summer fan facility, the Benson CP4 can enable the fan to
give ventilation in summer months.
• Pressing the FAN key displays the following screen.
• At this point you must press ENTER or if you wish to abort this operation press the DELETE key.
!
If the FAN key does not operate, the fan output is being used to give constant or automatic summer fan control.
This is described later in this manual.
To disable the fan, repeat the above operation.
FAN ON?
ENTER TO CONFIRM
Program Mode
From the Normal (RUN) mode screen, pressing the PROG
button will display the following screen.
Before you can access the Benson CP4 you must enter the passcode. This passcode is set to 0000 as a
factory default but may be changed at any time by the user to ensure security. This process is explained
under section 4 (code).
** WARNING **
ENTRY CODE: ????
Temp
This section is used to change the temperature settings.
Pressing 1 for Temp displays the following screen:
• You are now prompted to enter the required temperature for the
DAY periods (EG:22). This must be entered as two digits.
• When complete, press Enter
• You are now able to select whether you require frost protection.
Selecting ON enables you to set a NIGHT setback temperature.
• Press Enter when you have set the required night
temperature.
If S.Fan has been enabled, you are prompted to enter the summer fan
temperature. The summer fan temperature is calculated by a differential
setting. For example a differential of 03 means that the summer fan
temperature will be 03°C above the day setting. Therefore there is no risk
of the DAY temperature being higher than the Summer Fan setting.
Data
The DATA section is where you are able to set the daily switching periods. There are 3 switching periods per
day available.
• Press PROG and enter the security code
• Now select 2 to enter the DATA menu.
You can see on screen now that we are prompted to enter the switching
period 1 for Monday. So using 24 hour clock notation, enter the required
start time. (EG: 08.00)
Now press enter to accept the Start time and to move the cursor to the end time setting.
We are able to program the required End time, for example 17.00. Don’t forget to use 24 hour clock notation.
When complete, press Enter to accept the programmed switching time and to move onto period 2 Monday.
1> TEMP 2>DATA
3>SYSTEM 4>HOLS
SET DAY PERIOD
TEMP: 22°C
FROST PROTECTION
1>ON or 2>OFF
SET NIGHT PERIOD
TEMP: 05°c
SUMMER FAN
DIFFERENTIAL: XX
1>TEMP 2>DATA
3>SYSTEM 4>HOLS
MON PERIOD 1
S:HH:MM E:HH:MM
6
Programming further periods
You are now able to program period 2 Monday in just the
same way. Press Enter when complete.
Should you not require all three switching periods, simply leave the
times at HH:MM and this period will be ignored.
At this point press the Enter key to move onto Tuesday’s switching periods.
You are able to enter the switching periods for Tuesday
In just the same way.
Should the switching periods be the same on Tuesday, you can press the COPY button and this copies all of
the switching times from the previous day. So, for example, if you were to press the COPY button on Tuesday
period 1 all of the switching times from Monday would be copied, and then the Benson CP4 would move onto
Wednesday.
A screen is displayed to indicate the time have been copied.
!
System
This section allows you to set the system time/date and the security codes for the system.
System Time
• From the Normal RUN mode press PROG and enter the user
• Press PROG and enter the user code
• Now press 3 for System
• Now press 1 for System time
• You are now prompted to enter the new time
• When you have entered the new time, press the Enter key.
To correct any mistakes made, use the DEL Key. If Enter is pressed at any time then
the current settings will be retained.
security code.
(Enter this in 24 hour clock notation)
MON PERIOD 2
S: HH:MM E:HH:MM
MON PERIOD 3
S: HH:MM E:HH:MM
TUE PERIOD : 1
S:HH:MM E:HH:MM
COPYING ALL DATA
MON to TUE
1> SYSTEM TIME
2>SYSTEM CODE
TIME NOW: 13.07
NEW TIME: HH:MM
• You are now prompted to enter the System date.
(Date format is DD:MM:YY)
• When you have entered the new date, press the Enter key.
• You are now prompted to enter the day of week.
• When you have entered the new day, press Enter.
The control will revert back to the menu screen. Press RUN to return to the normal RUN mode.
System Code
• Press Prog and enter the security code.
• Pressing 3 for System
• Pressing 4 for Code prompts you to select the code you wish to alter.
7
DATE IS: 19-05-03
NEW DATE: DD:MM:YY
SET DAY OF WEEK
1==MON- 7==SUN
1> Manager Code - This code gives access to all data settings.
2> Override Code - This code gives access to the Override and
Summer functions.
To change the code, simply enter the new code when prompted.
Press RUN to return to the Normal RUN mode.
1> MANAGER CODE
2>OPERATORS CODE
CODE NOW: 0000
NEW CODE:????
!
Holidays
This is the section used to set the known holiday periods for the year when heating in the zone will not be
required.
Five holiday periods can be set. Follow the steps below for instructions on how to set the holiday periods.
• Press the program key and select option 4.
• You are now prompted to enter the holiday period 1.
• You should now program the length of the holiday. You should calculate the number of days you want the
• When the first holiday period is set press the enter key.
• Holiday period 2 will now be displayed.
You should program the remaining holiday periods in the same way. When all of the holiday periods have
been programmed the control will revert back to the Data menu.
Important Note:
1. If enter is pressed at any time then the current setting will be retained.
2. To cancel the holiday, put the date to 00.00.00 and length to 00. The holiday will then be cancelled
Setting the Manager and Operators code to the same disables the Operators code.
You must enter the start date in the DD-MM-YY format. When you
have programmed the start date of the holiday press enter.
heating off by counting from the first day of your holiday until the last. Now enter the length.
(ie. No code is required to access the operators section)
HOLIDAY PERIOD 1
S:00-00-00 L:00
8
Engineers Setup
To enter the engineers section, press the program button and enter the Engineers code. (This will be found on
a label inside the Benson CP4. )
A display like the one shown will now be displayed.
OVER (Override)
This section allows you to enter a limit for the override. Enter two digits
(eg:08 hours) and then press enter to accept the setting.
OPTI (Optimisation)
With the Benson CP4 you are able to set whether optimisation is required (Refer to Terms for further
information).
Should you require optimisation select 1 or 0 to disable it.
Selecting NO will return you to the Setup Menu and turns off optimisation. This means the control will switch the
heating ON at the programmed switching time and will not allow for any warm up period.
This is the amount of time the heating system takes to raise the building
temperature by 1°C. An average starting point would be 20 minutes but
because the unit is self learning, it will alter itself by 1minute per day to
adjust to the correct setting.
This is the maximum number of hours before the entered switching time
that the unit could come on to raise the temperature. The maximum
setting is 8 hours but an average setting is 3 hours.
1> OVERRUN 2> OPTI
3> CODE 4>SETUP
OVERRIDE SETTING
MAXIMUM TIME:08
OPTIMISATION ?
N<O> Y<1> : 1
RATE OF CHANGE
MINUTES /°C: 20
SET PRE-HEAT
MAXIMUM TIME: 03
CODE
The code section will work as normal and is used to set the User’s code.
SETUP
This section allows us to configure the control, set the required fan mode,
enable or disable the internal sensor and set-up the service mode.
CONFIG (Configuring the Benson CP4)
During the configuration process you will be asked to select the functionality required for the system being
controlled.
• Press PROG
• Enter the Engineer code
• Select 4 for Setup
• Select 1 for Config
• You are now prompted to select the control type you require.
ON/OFF = 1 HIGH/LOW =2
9
1> CONFIG 2> FAN
3>SENSOR 4>EXTRA
ON/OFF = 1 OR
HILO = 2 : 1
CONFIGURING THE CP4 (ON/OFF TYPE)
PURGE OPTION
You are now prompted to select whether a purge is required.
Selecting N here enables you to bypass the next two displays.
PURGE REQUIRED?
N<0> Y<1> : 1
Pre-purge activates relay 3 for the amount of time specified before
the heat relay is activated.
Post-purge will activate relay 3 for the amount of time
Specified after the heat relay has been switched off.
DOUBLE IGNITION
Enabling this option gives the following functionality.
When the heat relay is activated for the first time of each switching time, it will switch off after 30 seconds. Then
after a further 10 seconds the relay is re-energised and will operate as normal.
This operates at the start of every switching period and is used to ensure
that the heater fires when installed in areas where there is a high level
of condensation.
If post purge is enabled, the fan will timeout before the heater re-fires.
PROVING SWITCH
You are now prompted to select whether you have a proving switch
on the system.
When there is a demand for heat, the Benson CP4 looks to check firstly that the proving switch is not made.
Relay 3 is then energised giving pre purge if required. The proving switch then makes followed by relay 2 being
energised.
When you have completed the configuration procedure you will be returned to the setup menu screen. At this
point you can press RUN to return to the Normal RUN mode or you can continue to program the other settings
by selecting another menu option.
PREPURGE TIME
<MINS> :00
POSTPURGE TIME
<MINS> :00
DOUBLE IGNITION ?
N<0> Y<1> : 0
PROVING SWITCH?
N<0> Y<1> :0
10
CONFIGURING THE BENSON CP4 (HIGH/LOW TYPE)
HIGH FLAME BOOST
Enabling this option gives the following functionality.
Whenever there is a heat demand, both high and low relays are activated. After 1 minute the system checks to
see if both high and low relays are required. If the temperature is within the differential programmed, the high
flame relay is switched off.
HIGH/LOW DIFFERENTIAL
When the Benson CP4 is being used to control a two stage heater, you must enter the Hi/Lo differential
setting.
HIGH FLAME BOOST
N<0> Y<1> :0
• You are now prompted to enter the Hi/Lo differential.
• A differential setting of 4 and a required temperature of 20°C means that the control will have low and high
flame active until the actual temperature reaches 16°C. At this point, the high flame will be switched off.
DOUBLE IGNITION
Enabling this option gives the following functionality.
When the heat relay is activated for the first time of each switching time, it will switch off after 30 seconds. Then
after a further 10 seconds the relay is re-energised and will operate as normal.
This operates at the start of every switching period and is used to ensure
that the heater fires when installed in areas where there is a high level of
condensation.
PROVING SWITCH
You are now prompted to select whether you have a proving switch
on the system.
When there is a demand for heat, the Benson CP4 looks to ensure that the proving switch is made. The heat
outputs (High/Low) will be energised when the switch is made.
ENTER THE HILO
DIFFERENTIAL:04
DOUBLE IGNITION ?
N<0> Y<1> : 0
PROVING SWITCH?
N<0> Y<1> :0
11
SYSTEM SETUP
FAN
The Benson CP4 has three fan modes available.
User: In this mode, the user is allowed to manually switch the fan relay on/off by use of the FAN Key.
Constant Fan: On the Benson CP4 there is an option to have a constant Fan output. If enabled the fan relay will
be permanently ON during the programmed switching times and will operate to the optimiser setting.
Summer Fan: Allows the user to enter a summer fan differential. This setting is the number of degrees above
the DAY temperature that the summer fan relay will be activated. Therefore, with a day temperature of 20 and
a differential of 03 the smmer fan relay will be activated at 23°C. The minimum differential is 02 and the maximum
is 06°C.
SENSOR
The Benson CP4 has an internal sensor which is disabled as a factory
default. To enable it, select 1 for Yes when prompted.
The Benson CP4 has averaging facility. The system will automatically calculate and display the average
reading when any two sensors (internal or remote) are detected.
You are now prompted to calibrate the first sensor, if you have enabled
the internal sensor you will calibrate this first followed by 1 remote sensor.
If you have not enabled the internal sensor you are prompted to
calibrate the first and then second remote sensor.
To calibrate, simply enter the new sensor reading after the colon.
EXTRA
SERVICE MODE
From the Normal Run Mode, enter the engineers code and press 4 for Setup, 4 for Extras followed by 1 for
Service mode.
You are now prompted to:
1> Configure the service mode or
2> Reset the current hours run total held in the unit
USER<0> C.FAN <1>
S.FAN <2> : 0
INTERNAL SENSOR
N<0> Y<1> : 0
CALIBRATE (20)
INTERNAL : 23
CALIBRATE (19)
REMOTE 1 : 20
1> CONFIGURATION
2> RESET DATA
Pressing 1 to configure the unit will display the following
screen and will ask you to turn the service mode on of off.
You are now required to enter the number of hours the system may run
before the service mode should be Activated. Press Enter to accept
the programmed setting.
You should now enter the phone number that you want
displayed when a service
SERVICE ALARM ACTIVATED
When a service alarm has been activated a warning screen will be displayed for 5 seconds every minute. You
are able to cancel this warning by pressing RESET whilst the warning display is on screen.
Remember that you will not receive further service alarms until the control has been reset by an engineer.
12
SERVICE MODE
N<0> Y<1> : 0
SERVICE MODE
HOURS RUN: 0000
SERVICE MODE
CALL : 0000000000
RESETTING THE SERVICE ALARM
After a service alarm has been activated you are able to reset the hours setting without the need to reprogram
the telephone number by selecting Reset from the Configuration/Reset screen.
SYSTEM RESET
This function resets the Benson CP4’s settings back to the factory default.
To put the control through a reset:
• Press 4 for Setup
• Press 4 for Extra
• Press 2 for Reset
• Pressing ENTER at this point will erase all data. To abort press the DELETE Key.
RESET ALL DATA?
ENTER TO CONFIRM
SYSTEM SPECIFICATIONS
Enclosure: ABS Fire Retardant
Dimensions: 222mm x 156mm x 61mm (Length, Height,Depth)
Weight: 1.3 kg
Relays: Relay 1-3 normally open contacts
Alarm Input: 230v AC. 5mA Max.
Supply: 230v AC ± 10% 50Hz
Sensors: Only use Heatmiser Sensors. Twin screened cable (Beldon 8451)
Battery: 3 years (Replacement battery: CR2430)
Fuses: FS1: 800mA Antisurge
Relay 4 normally open, normally closed contacts
10 amp 230v rating relays 1-3
FS2: 315mA Quick blow
FS3: 315mA Quick blow
13
REMOTE
SENSORS
+
1
2
+
-
INPUT1
INPUT2
12V
S
+
-
S
SENSOR2
(OPTIONAL)
1
+
-
S
SENSOR
proving
switch
(Optional)
Override
switch
(Optional)
Sensor and input wiring
Beldon 8451 (RS 360-649) Twin, Screened cable
must be used when connecting the remote sensors
MISTRAL
1
1
01
CP4
14
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