CALECTRO CMT-24/230V User manual

Calectro AB Phone: [phone] [e-mail] www.calectro.com
CMT-24/230V INSTALLATION INSTRUCTIONS
ENGLISH
Universal thermostat with 11 built-in and
selectable functions.
Multi-voltage: 24V AC/DC and 230V AC.
WARNING: IMPORTANT
INFORMATION
CONCERNING
ELECTRICAL SAFETY
AND ENVIRONMENT
The product may incorporate lethal volt-
age. The product's enclosure is not intend-
ed to be opened. At 230V AC supply volt-
age the product shall be powered via a
proximally mounted disconnection device
marked: "Disconnection device for ther-
mostat CMT". The product's relay switch
can be energised with 230V which must
be disconnected prior to conducting main-
tenance work. The product is intended for
indoor use. The product shall not be sub-
jected to liquids or moisture. The outside of
the product can be cleaned using a slightly
moist cloth rag. The product is intended for
installation on a DIN rail / Norm enclosure
in an area protected from the public.
!
INDEX
1. Technical data
2. Function
3. Use
4. Installation
5. Maintenance
6. Buttons and menu system
7. Selection of application/function
8. Selection of temperature sensor type - fac-
tory setting: Pt1000
9. Setting of prefered/ set point values
10. Setting of hysteresis
11. Fine-adjustment of the temperature meas-
urement
12. Setting of timer function
13. Display example
14. Error codes and temperature/ohm table
15. Resetting factory settings
16. Figures
17. Connection example for each respective
application
18. Menu system – overview/quick menu
1. TECHNICAL DATA
Supply voltage:24V AC ±10%,
24V DC ±5% and
230V AC ±10% 50-60 Hz
Relay outputs: 250V ~5A resistive
loading, change-over
potential-free
Power consumption: 4W
Temperature range: -99 to +600°C
Ambient temperature: 0 to +40°C
Selectable
temp.sensors: Pt1000 (factory setting),
Pt100, Ni1000,
NTC (Calectro type:
22/33/44/55/99) and
PTC (Calectro type: 95)
Switching differential:0-15°C in stages of 0.2°C
Mounting: DIN rail, Norm-enclosure
Dimensions WxHxD: 52.5 x 86 x 59mm
Weight: 240 g.
Enclosure class: IP20
2. FUNCTION
CMT can be powered by 24V AC/DC via plinth 15-16
or 230V AC via plinth 1-2. See figure 2. CMT has two
alternating potential-free relay outputs (5 A, 250V)
and has an adjustable hysteresis (switching differen-
tial) which is centred over the reference value.
CMT carries out a self-test during start-up and fol-
lowing change of temperature sensor. Three bars
blink at the lower part of the display. Once the self-
test has finished the actual temperature will be dis-
played. In the case of interruption to the temperature
sensor the display shows Er0 and in the case of
short-circuit Er1 is displayed.
3. USE
Universal thermostat with 11 built-in and selectable
functions:
Appl. 1 1-stage heating thermostat
Appl. 2 1-stage cooling thermostat
Appl. 3 2-stage heating thermostat
Appl. 4 2-stage cooling thermostat
Appl. 5 2-stage heating and cooling thermostat
Appl. 6 1-stage cooling thermostat with low tem-
perature alarm
Appl. 7 1-stage heating thermostat with overheat-
ing alarm
Appl. 8 2-stage overheating alarm
Appl. 9 High and low temperature alarm
Appl. 10 Gutter thermostat, relay 2 = fault alarm
Appl. 11 Gutter thermostat with whole numbers,
relay 2 = fault alarm
4. INSTALLATION
CMT is mounted on a DIN rail and is adapted to Norm
enclosures.
Gutter thermostat (application 10 and 11)
Positioning of thermostat and outdoor temperature
sensor.
In order to counteract icing heated cables are used in
guttering and downpipes. The temperature at which
ice forms varies from building to building depending
on several factors such as, on the degree of insula-
tion, the compass direction, radiated heat from the
Sun, etc. Position the thermostat in an easily acces-
sible position for service personnel inside the build-
ing. The outside temperature sensor is positioned on
the building's north elevation in a position away from
direct sunlight, e.g. under the soffit See figure 3.
5. MAINTENANCE
CMT is maintenance-free.
6. BUTTONS AND MENU SYSTEM
▲ = Step up in the menu / increase value - Keep
the button depressed and the reference value
counts up rapidly.
▼ = Step down in the menu / decrease value -
Keep the button depressed and the reference
value counts down rapidly.
= Is a multi-function button whose current
function* is shown in the display beside the button.
* Central button functions:
• Exit Menu = Exit the menu/Save setting
• Menu Enter = Enter submenu
• Menu = Enter the menu or select application
• Enter = Confirm setting
• Reset = To reset relay after alarm, applica-
tions 6-9
Menu
Enter
Reset
Exit
The menu system consists of the following sub-
menus:
1. Selection of temperature sensor
2. Setting of hysteresis
3. Fine-adjustment of the temperature meas-
urement
4. Timer functions
5. End the menu system
7. SELECTION OF APPLICATION/
FUNCTION
CMT is a multi-functional thermostat with eleven
selectable applications:
To select an application the central button must
be in function: "Menu". Press and keep it
depressed. Then press ▲ and keep both but-
tons depressed for 4 seconds. APP will now be
displayed in the upper left-hand corner with the
relevant application number. On the one side of
the thermostat there is an application overview.
Mark the sticker with the application setting for
future service and maintenance. Choose the
desired application with ▲ and ▼ then confirm
with Enter ( ).
Enter


© 2021.03.08 R2.0 Calectro AB HFE636 EN
EN

your selection with Enter.
6. Use the arrow buttons to step, and confirm Exit-
Menu to terminate and save setting.
9. SETTING OF PREFERED VALUES/SET POINT
To change set points press ▲ or ▼ to achieve the
desired value. The set point value will flash during
setting. Confirm and terminate with Enter ( ). In
cases where the selected application contains two
set point values the next value will now start to flash.
Change with ▲ or ▼ to the desired value and confirm
with Enter ( ). Done!
Enter
<<
°
C
1
 

Set point values and relays:
1-stage applications:
- The reference value to the left controls the function
for relay 1.
2-stage applications:
- The reference value to the left controls the function
for relay 1.
- The reference value to the right controls the func-
tion for relay 2.
Example:
Set point value for relay 1 is displayed in the upper
left-hand corner: The 'less-than' symbol (<) indicates
that the relay is calling for heat when the temperature
is lower than the set point value = heating function.
Set point value for relay 2 is displayed in the upper
right-hand corner: The 'greater than' symbol (>) indi-
cates that the relay is calling for cooling when the
temperature is higher than the set point value = coo-
ling function.
Selectable applications
Appl. Function Factory settings
Reference
value °C
stage 1
Reference
value °C
stage 2
Hysteresis
°C stage 1
Hysteresis
°C stage 2
Time setting in
minutes (adjustable)
11-stage heating thermostat 23 -0,6 -
21-stage cooling thermostat 25 - 1 -
32-stage heating thermostat 23 21 0,6 0,6
42-stage cooling thermostat 25 27 1 1
52-stage heating and cooling thermostat 22 24 0,6 1
61-stage cooling thermostat with low temperature
alarm *1
5 1 1 0 0 (0-120) *3
71-stage heating thermostat with overheating alarm *1 50 85 0,6 00 (0-120) *3
82-stage overheating alarm *1 40 60 0 0 0 (0-120) *3
9 High and low temperature alarm *1 8 3 0 0 0 (0-120) *3
10 Gutter thermostat *2, relay 2 = fault alarm -5 50,6 0,6 0 (0-120) *4
11 Gutter thermostat *2 with whole numbers, relay 2 =
fault alarm
-5 50,6 0,6 0 (0-120) *4
*1) The alarm relay is activated in normal oper-
ational mode and is deactivated in the event of
an alarm or power loss. In the event of an alarm
"ALARM" is displayed under the respective
alarm reference value.
*2) Double thermostat where relay 1 activate
heating when the outside temperature is
between set point 1 and 2 (the temperature at
which snow on a roof can melt and form icicles).
*3) Delayed alarm time, e.g. to allow for defrost-
ing.
*4) After-running time: To ensure de-icing.
In the event of alarm (applications 6-9) the
relay(s) are locked in the alarm condition until the
Reset button has been depressed. If the alarm
condition reverted to "normal temperature" when
the Reset button was depressed, the relay is
reset and the central button reverts to the Menu
function.
If the alarm condition persists, when press-
ing the Reset button, the relay will not be reset.
However, the central button reverts to Menu
function for 5 seconds in order to allow settings
in the menu system, or in order to change appli-
cation.
The set point values and alarm reference values
can always be adjusted even during an alarm
condition. See section 9.
CMT has a monitor for the temperature sensor
and disconnects from heating or cooling in the
event of short-circuit or interruption in the sen-
sor circuit. However this is not valid for the gutter
thermostat function in application 10.
8. SELECTION OF TEMPERATURE
SENSOR
CMT can be connected to several different types
of temperature sensor: Pt100, Pt1000, Ni1000
and the ETF series for Calectro's NTC and PTC
sensors. Pt1000 is the factory set sensor type.
2. Press the Menu button ( ) to access the
menu system
3. The actual type of temperature sensor will
be displayed.
4. Press Menu-Enter to change the type of
temperature sensor
5. The actual sensor type now starts to flash
and it is now possible to select another sen-
sor type using the arrow buttons. Confirm
<
12
>
 
10. SETTING OF HYSTERESIS
CMT has an adjustable hysteresis (switching
differential) which is centred over the set point
value. The factory setting for the heating ther-
mostat is 0.6°C and for the cooling thermostat
1.0°C.
Example: A heating thermostat with set point
value of 22°C and hysteresis 0.6°C. The relay
activates the heater at lower than 21.7°C and
reverts at greater than 22.3°C.
Temperature
Relay
0 21,7
0,3°C 0,3°C
22 22,3
1
Set point
No hysteresis is used for alarm functions.
1. Press the Menu button ( ) to access the
menu system
2. Step using the arrow buttons until "Hyst" is
shown on the display.
3. Press Menu-Enter to change hysteresis.
4. The actual hysteresis now starts to flash
and it is now possible to adjust the hyster-
esis using the arrow buttons. Confirm your
selection with Enter ( ).
5. Use the arrow buttons to step, and confirm
Exit-Menu to terminate and save setting.

11. FINE ADJUSTMENT OF THE
TEMPERATURE MEASUREMENT
If necessary the temperature measurement
in the CMT can be adjusted. Range: -3.0°C to
+3.0°C in steps of 0.1°C.
1. Press the Menu button ( ) to access the
menu system.
2. Step using the arrow buttons until "Adj" is
shown on the display.
3. Press Menu-Enter to adjust.
4. The actual compensation and temperature
now starts to flash and it is now possible to
adjust the compensation using the arrow
buttons. Confirm your selection with Enter
().
5. Use the arrow buttons to step and confirm
Exit-Menu to terminate and save setting.
12. SETTING TIMER FUNCTION
In the alarm applications (applications 6-9) it is
possible to set a delayed alarm period (0-120
minutes), factory setting: 0 minutes) e.g. in order
to defrost without activating the alarm.
In the application for the gutter thermostat (appli-
cation 10 and 11) an after-running time can be
set (0-120 minutes) to ensure de-icing.
1. Press the Menu button ( ) to access the
menu system.
2. Step using the arrow buttons until is
shown on the display.
3. Press Menu-Enter to adjust.
4. The actual time now starts to flash and it
is now possible to adjust the time. Confirm
your selection with Enter ( ).
5. Use the arrow buttons to step and confirm
Exit-Menu to terminate and save setting.
13. DISPLAY EXAMPLE
Relay symbols in the display
The 1symbol is shown in the display when relay
1 is calling for heating, cooling or is in an alarm
condition (depending on application selected).
The same is valid for the symbol for relay 2.
12
Relay 1 Relay 2
Display example application 5
The example below shows a 2-stage heat-
ing/cooling thermostat with set point values
of 23.0°C and 25.0°C. The temperature is now
22.1°C and relay 1 is activated.
The "less than" symbol "<" to the left of set point
value 1 indicates heating function: Relay 1 is
activated when the temperature is less than the
set point value (minus half the hysteresis).
The "greater than" symbol ">" to the left of set
point value 2 indicates cooling function: Relay 2
is activated when the temperature is greater than
the set point value (plus half the hysteresis).
Menu
<
°
C
1
>
 

Current
temperature
Greater than 25°C
plus ½ hysteres
= cooling activated
Less than 23°C
minus ½ hysteres
= heater activated
Current temperature
is 22,1°C = relay 1
(heating) is activeted
Display example application 8
The example below shows a 2-stage overheating
temperature alarm with alarm set point values of
40.0°C and 60.0°C. The temperature is now 49.1°C
and relay 1 is activated.
The "greater than" symbol ">" to the left of set point
values 1 and 2 indicates function for overheating
alarm: The relays go into alarm condition when the
temperature is more than the respective alarm set
point value (hysteresis is not used in alarm func-
tions).
Reset
Alarm
°
C
1
>>
 

Current
temperature
Current temperature
is 49,1°C = relay 1 is
in alarm condition
-button is
now Reset
Greater than 40°C
= Relay 1 in alarm
condiction
Greater than 60°C
= Relay 2 in alarm
condiction
The text Alarm shows which
set point that is exeeded.
14. ERROR CODES
CMT has a monitor for the temperature sensor and
disconnects from heating or cooling in the event of
short-circuit or interruption in the sensor circuit. In
the case of interruption the display shows Er0 and in
the case of short-circuit Er1 is displayed.
Er0 Interruption in the sensor intake
Er1 Short-circuit in the sensor intake
Er2 Temperature out of range
Temperature/ohm table
Sensor type Temperature Ohm
Pt1000 0°C
20°C
40°C
1000
1078
1156
Pt 100 0°C
20°C
40°C
100
107,8
115,6
Ni1000 0°C
20°C
40°C
1000
1090,7
1185,7
NTC
(Calectro type
22/33/44/55/99)
0°C
20°C
40°C
37942
14871
6539
PTC
Calectro type 95)
0°C
20°C
40°C
1631
1915
2226
15. RESETTING FACTORY SETTINGS
In changes to or reselection of application set-
tings will revert to factory settings. The type of
temperature sensor and its possible fine-adjust-
ment will, however, not be affected. See section
7: Select Application/Function.
16. FIGURES
FIG. 1
45
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
60 86
52,5/3 mod.
54
29 19 11
59
FIG. 2
The relay outputs are shown in alarm/
no power on condition. Max 5A, 250V.
1 2
L N
3 4 5 6 7 8
9 10 11 12 13 14 15 16
(+) (–)
230V AC 230V AC
Relay 1 Relay 1 Relay 1 Relay 2 Relay 2 Relay 2
Not used Not used
Temp. sensor Temp. sensor
Not used Not used
24V AC/DC 24V AC/DC
FIG. 3
Heating
cable
Temperature sensor
CMT
Thermostat
N S
Heating
cable

17. CONNECTION EXAMPLES FOR EACH RESPECTIVE
APPLICATION
Relays are shown in a currentless condition
1 2 3 4 5 6 7 8
Relay 1 Relay 2
Application 1: 1-stage heating
1 2
NC C NO
Relay 1
Supply to load
3 4 5 6 7 8
Application 2: 1-stage cooling
1 2
NC C NO
Relay 1
Supply to load
3 4 5 6 7 8
Application 3: 2-stage heating
1 2
NC C NO NC C NO
Relay 1
Supply to load
Supply to load
Relay 2
3 4 5 6 7 8
Application 4: 2-stage cooling
1 2
NC C NO NC C NO
Relay 1 Relay 2
3 4 5 6 7 8
Supply to load
Supply to load
Application 5: 1-stage heating and 1-stage cooling
1 2
NC C NO NC C NO
3 4 5 6 7 8
Relay 1
Supply to load
Supply to load
Relay 2
Application 6: 1-stage cooling with interlocked alarm relay
1 2
NC C NO NO C NC
Supply to load
3 4 5 6 7 8
Relay 1 Relay 2
Application 7: 1-stage heating with interlocked alarm relay
1 2
NC C NO NO C NC
3 4 5 6 7 8
Supply to load
Relay 1 Relay 2
Application 8: 2-stage overheating alarm
1 2
NO C NC NO C NC
3 4 5 6 7 8
DI1
DDC/Alarm panel etc:
Closed DI = normal
Open DI = alarm
DI2
Relay 1 Relay 2
Application 9: High and low temperature alarm
1 2
Relä 1 = High temperature alarm
Relä 2 = Low temperature alarm
NO C NC NO C NC
3 4 5 6 7 8
DI1 DI2
DDC/Alarm panel etc:
Closed DI = normal
Open DI = alarm
Relay 1 Relay 2
Application 10: Gutter thermostat, relay 2 = fault alarm
1 2
NO C NC NO C NC
Relay 1
Supply to load
Relay 2
3 4 5 6 7 8
Relay 1 calls for heat even in the event of a sensor fault
DDC/Alarm panel etc:
Closed DI = normal
Open DI = alarm
DI1
Application 11: Gutter thermostat with whole numbers, relay 2 = fault alarm
1 2
NC C NO NO C NC
Relay 1
Supply to load
Relay 2
3 4 5 6 7 8
DDC/Alarm panel etc:
Closed DI = normal
Open DI = alarm
DI1

18. MENU SYSTEM - OVERVIEW
Menu
Enter
Hyst

Menu
Enter
Pt1000
Menu
<
°
C1
>
 

Menu
Enter
Adj

Menu
Enter

Enter

Enter
Pt1000
Enter
Hyst
Enter
Pt100 Enter
Enter

Enter

Menu
Exit
Menu
<
°
1
 
C
>

P TC Enter
NTC
Press Menu to access the Menu System.
Navigate between the submenus using the arrow
keys and select sub-menu with Menu-Enter.
Select the type of temperature sensor. Navigate between the different types and confirm with Enter.
Save settings and return to the normal display position through Exit-Menu.
For 2-stage functions (applications 3-5)
the hysteresis for target value 2 can be set.
Enter the required hysteresis and confirm with Enter.
Select the required alarm delay or after-run time. Confirm with Enter.
If necessary the temperature measurement may be fine-tuned (-3.0 to +3.0°C). Confirm with Enter.
Hyst
Enter
Ni 1000
°
C

°
C

Adj