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DIGITAL CONTROLLER FOR COOLING
WITH NATURAL DEFROST
AND FOR HEATING
MT-512G
The is a temperature controller and indicator.
Controls cooling and defrosts through compressor shutdowns.
MT-512G
· Counters
· Cooled chambers
· Greenhouses
115 or 230Vac (50/60Hz)
-50 to 99°C (-58 to 99°F)
0,1°C (between -10 and 10 °C) and 1°C in the restof the range
16(8)A/ 250Vac 1HP
0 to 50 °C
10 to 90% RH (without condensation)
- Power supply:
- Control temperature:
- Resolution:
- Maximum current:
- Operating temperature:
- Operating humidity:
Access code: 23 (twenty three)
Control differential (hysteresis)
Minimum setpoint allowed for the end user
Maximum setpoint allowed for the end user
Additional time at the end of the first cycle
Cooling time
Defrosting time
()
(heating)
()
Operation mode
Initial state up on energizing the instrument
Temperature indication locked during defrost
Delay on the activation of the instrument
Delay to turn the cooling output on
Situation of the compressor with the damaged sensor
Indication offset
Intensity of the digital filter
Fun
CELSIUS FAHRENHEIT
MT-512G allows changing from refrigeration to defrost or vice-versa, regardless of what is
programmed:
1. Press the key for 4 seconds until is displayed;
2. If the controller is in the refrigeration cycle, when the key is released the display will show and
the defrost cycle will start;
3. If the controller is in the defrost cycle, when the key is released the display will show and the
refrigeration cycle will start.
– Sensor disconnected or temperature out-of-range;
– Indicates the defrost cycle;
– Indicates that the defrost cycle is turned on;
– Indicates that the defrost cycle is turned off (starts the refrigeration cycle);
– Indicates the refrigeration cycle;
– Indicates that the controller is operating in heating mode;
– Indicates the initial delay;
– Invalid configuration parameters;
In this situation the outputs are automatically turned off.
Check which parameters have invalid data and correct them to return to normal operation.
LED flashing – The controller is in cooling mode / heating and with the output on;
LED off – The controller is in cooling mode / heating and with the output on off;
LED on – The controller is in defrost mode.
Configuration parameters protected by access code (except setpoint).
After entering the access code, be careful not to leave the key idle (without being pressed)
between parameter changes for more than 15 seconds.
If this happens, the message will be displayed and the access to the adjust mode
is automatically blocked, requiring entering the code again to make any changes.
After entering the access code:
Note:
1. Press the frontal key of the panel for 8 seconds until appears;
2. Releasing the button it will appears ;
3. Use the key to insert the code 23 (twenty-three). This operation must be done in 4 seconds, otherwise
the indication of ambient temperature returns automatically;
4. Wait 4 seconds to the instrument record the access code. At this time appears in the display
and then the temperature.
If the access code is correct, the controller allows the user toview and change the parameters.
5. Press the key as many times as necessary until you reach the desired parameter.
6. Wait2 seconds and then appears the adjusted value.
7. Use the key to modify the value;
8.Wait 4 seconds until the new value is recorded and the instrument returns to show the room
temperature;
9. To change another parameter, repeat steps 5, 6, 7 and 8.
- Press the frontal key for 12 seconds until appears ;
- Releasing th key, the set control temperature will appear.;
- Use the key to change the value. This operation must be done in 4 seconds, otherwise the indication of
ambient temperature returns automatically.
- Wait 4 seconds to record and return to the normal operation.
* Frozen display indication - Ifi s active, the indication is only released in the following refrigeration cycle and when the
temperature reaches the "locked" value again, or after 15 minutes in refrigeration (as a safety measure).
This filter aims at simulating an increase of environment sensor mass, thus increasing its response time (thermal inertia). The
larger the value adjusted in this function, the longest the response time of the sensor.
A typical application requiring this filter is the freezer for ice cream or frozen goods, because when the door is opened a hot air mass
reaches the sensor directly, causing a quick rise in the indication of the measured temperature, thus causing the compressor to be
activated unnecessarily many times.
**
Press the key and then release it (short touch). Soon the display will show the process that is
running and the elapsed time.
Example:
The controller is in refrigeration mode for 192 minutes.
The controller is in defrost mode for 25 minutes.
The controller is executing the delay time to power the instrument onfor 2 minutes.
The controller is in heating mode.
- Press the frontal key of the panel for 8 seconds until appears;
- Releasing the button it will appears ;
- Use the keys to enter code 31 (thirty-one). This option must be executed within four seconds, otherwise
the display will automatically return to showing the room temperature;
- Wait4 seconds to save the access code;
- Then the display will show the measurement unit in use ( or );
- Press the keys to change the value between and and vice-versa;
-After 4 seconds without pressing any other keys the controller will save the selected unit;
- If the measurement unit is changed, will be displayed and the parameters will assume their
default values.
1. DESCRIPTION
2. APPLICATIONS
3. TECHNICAL SPECIFICATION
4. CONFIGURATIONS
4.1 - Control temperature adjust (SETPOINT)
4.2 - Parameters alteration
4.3 - Parameters table
5. FUNCTIONS WITH FACILITATED ACCESS
5.1- Show current status
5.2 - Manual defrost
6. SIGNALLING
7. UNIT SELECTION (°C / °F)
8. WIRING DIAGRAM
Note:The length of the sensor cable may be increased by the user up to 200 meters, using a PP 2 x 24
AWG cable. For immersion in water, use thermometric we
Description Min Max Unit
Standard
Min Max Unit
Standard
-
3
-1
5
0
30
25
0-refrig.
1-yes
0
18
0-off
0
5
0-refrig.
-
20
99
99
99
99
99
1-defrost
1-yes
99
99
1-on
5
9
1-heat.
-
°C
°C
°C
min.
x10min.
min.
-
-
min.
x10sec.
-
°C
-
-
-
1
-58
-58
0
1
0
0-refrig.
0-no
0
0
0-off
-9
0
0-refrig.
-
40
99
99
99
99
99
1-
1-
99
99
1-
9
9
1-
defrost
yes
on
heat.
-
°F
°F
°F
min.
x10min.
min.
-
-
min.
x10sec.
-
°F
-
-
-
0.1
-50
-50
0
1
0
0-refrig.
0-no
0
0
0-off
-5
0
0-refrig.
-
37
30
41
0
30
25
0-refrig.
1-yes
0
18
0-off
0
5
0-heat.
Ver.02
Carga - 16(8)A / 250Vac 1HP
Sensor
0
115V
230V
Power
supply Load supply
Above specified current use a contactor
MT512GV02-03T-12775
