Full Gauge MT-444 eXpress Manual

BEFORE INSTALLING THE CONTROLLER, WE RECOMMEND READING THROUGH THE
ENTIRE INSTRUCTION MANUAL IN ORDER TO AVOID POSSIBLE DAMAGE TO THE
PRODUCT.
PRECAUTIONS WHEN INSTALLING THE PRODUCT:
Before performing any procedure on this instrument, disconnect it from the mains;
Ensure that the instrument has adequate ventilation and avoid installation in panels containing
devices that may cause it to operate outside the specified temperature limits;
Install the product away from sources that may generate electromagnetic disturbances such as:
motors, contactors, relays, solenoid valves, etc;
AUTHORIZED SERVICE:
The installation or maintenance of the product must be performed by qualified professionals only;
ACCESSORIES:
Only use original Full Gauge Controls accessories.
If you have any questions, please contact technical support.
DUE TO YOUR CONSTANT EVOLUTION, THE FULL GAUGE CONTROLS RESERVES THE RIGHT TO CHANGE
THE INFORMATION CONTAINED IN THIS MANUAL AT ANY TIME WITHOUT NOTICE.
1. DESCRIPTION
The MT-444 eXpress is a digital controller designed specifically for cooling. The touch screen keys can
select the desired Preset (3 options); enable/disable the energy saving mode, among other functions. It has a
normal operating setpoint and a power-saving setpoint for each one of the three Presets, with their respective
hysteresis.
While the MT-444 eXpress offers a default solution for most applications, the MT-444 V-eXpress
offers a distinct characteristic, the power grid voltage meter. Using the True-RMS strain gauge, it is capable of
protecting the compressor against activations with improper voltage, whether it is high or low. Similarly, when
the power grid voltage is higher or lower than the maximum or minimum voltage setup, the compressor output
will be automatically switched off for protection.
2. APPLICATION
- Beverage displays;
- Refrigeration cabinets.
3. TECHNICAL SPECIFICATIONS
- Power Supply: 230Vac ±10% (50/60 Hz) or on the version 115Vac ±10% (50/60 Hz)
- Setpoint Temperature: -50 to 60ºC or -58 to 99ºF
- Operation Temperature: 0 to 45ºC (32 to 113ºF)
- Resolution: 0.1ºC between -9.9 and 9.9ºC and 1ºC on the remainder of the range
1ºF on all the range
- Maximum current of the relays: 10(8) A/ 250Vac 1HP–compressor output
7A/ 250Vac – defrost output
3(2) A/ 250Vac – 1/10HP– fan output
2(2) A/ 250Vac – light output
- Digital input: input for open-door detection (dry contact type)
- Operating humidity: 10 to 90% RH (with no condensation)
- Frontal dimension (with frame): 105x55x90 mm (WxHxD)
- Frontal cutouts dimension: 91x45 mm
- Base module dimension: 113x87.5x32 mm (WxHxD)
4. INDICATORS AND KEYS
6
5
4
3
2
1
Power-Saving Mode LED indicator
1
Light LED indicators
2
3 LED indicator for pre-defrost and defrost (on) or draining (blinking)
4 Fan LED indicators
5 Compressor LED indicators
6 Power-Saving Mode Key
7 Temperature unit LED indicator
8 Plus Key / Preset 1
9 Set Key / Preset 2
10 Minus Key / Preset 3
VER. 01
DIGITAL COOLING CONTROLLER WITH
TOUCH SCREEN KEYS
Power-saving Touch Manual Function
mode screen Defrost blocking
WARNING
7
8
9
10
Audible
Turn control Serial
Alarm
functions off Programming
5. BASIC OPERATIONS
NOTE: If L3 is at 0, the first touch will be to enable the keyboard.
5.1 Change Preset
To select the desired preset, press and hold the corresponding key for 2s, until the [Pr] screen appears, and
then release it.
Press and hold for 2 sec.
5.2 Turning power-saving mode on/off
To turn the energy saving mode on/off press and hold the
then release it.
Press and hold for 2 sec.
5.3 Silencing the alarm
To silence the audible alarm, tap any of the keys , or .
Tap
5.4 Manual Defrost
To start/stop a manual defrost, regardless of the schedule, press and hold the
message appears, and then release it. The [On] message will appear when it has started and the [OF]
message when it has been stopped.
Press and hold for 10 sec.
5.5 Display process stage and the current desired temperatures
(setpoint)
To see which process stage is underway, press and hold the
and then release it. The stage of the process in progress will be displayed, showing the desired temperature
(setpoint) in use, in relation to the current operating mode (normal/power-saving).
Press and hold for 4 sec.
Preset 1
Preset 2
Preset 3
release
the key
key for 2s, until the [EC] message appears, and
On
release
Off
the key
$ % &
%
key for 10s, until the [dF]
On
release
Off
the key
&
key for 4s, until the [St] message appears,
Displays the Shows the current desired
current stage temperature (setpoint)
Fan delay
release
Cooling
the key
Pre-defrost
Defrost
Draining
ex: (2.0ºC)