Full Gauge Controls MT-444 eXpress Manual

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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, wheter 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
Setpoint temperature
Operation temperature
Resolution
Maximum current of the relays
Digital input
Operating humidity
Frontal dimension (with frame)
Frontal cutouts dimension
Base module dimension
4. INDICATORS AND KEYS
5
1 Power-Saving Mode LED indicator
2 Light LED indicators
LED indicator for pre-defrost and defrost (on) or draining (blinking)
3
Fan LED indicators
4
Compressor LED indicators
5
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
DIGITAL COOLING CONTROLLER WITH
TOUCH SCREEN KEYS
Power-saving Touch Manual
mode screen Defrost
WARNING
230Vac 10% (50/60Hz) ±
or on the version 115Vac 10% (50/60Hz)
±
-50 to 60°C or -58 to 99°F
0 to 45°C (32 to 113°F)
- 0.1°C between -9.9 and 9.9°C and 1°C on the
remainder of the range;
- 1°F on all the range.
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
Input for open-door detection (dry contact type)
10 to 90% RH (with no condensation)
105x55x32mm (WxHxD)
91x45mm
113x87,5x32mm (WxHxD)
7
6
4
3
2
1
Function Turn control Audible Serial
Alarm
blocking 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 key for 2s, until the [EC]message appears, and
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
[dF]message appears, and then release ir. 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 in underway, press and hold the
8
appears, 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)
9
10
Press and hold for 4 sec.
Preset 1
Preset 2
Preset 3
release
the key
On
release
Off
the key
%
key for 10s, until the
On
release
Off
the key
&
key for 4s, until the [St] message
Shows the current desired
Displays the
temperature (setpoint)
current stage
Fan delay
release
Cooling
the key
Pre-defrost
Defrost
Draining
ex: (2.0ºC)