Full Gauge Controls MT-444e Fit Manual

1. DESCRIPTION
Designed to maximize energy efficiency in commercial refrigeration equipment, the MT-444
features pluggable terminal block for quick coupling, increasing productivity in manufacturing lines. It is
equipped with 4 output relays (compressor, fan, defrost and light), 2 temperature sensors and one digital
input. It can be configured with 3 independent sets of parameters for quick change of (setpoint, eco-
setpoint, differential and defrost) settings to accommodate change of product in the room. Digital input
can be programmed to activate/deactivate economic set point, initiate defrost, door ajar alarms, door
open counter or light control. Light and economy set point can also be controlled through quick access
menu key, eliminating the need of external switches. Other salient features include temperature initiated
defrost, internal buzzer, IP65 frontal, drip protection case on rear, min-max temperature record, serial
programming key, multi LED color options and functions lockdown to prevent unauthorized parameter
changes.
Product conforming to UL Inc. (United States and Canada).
2. SAFETY RECOMMENDATIONS
- Check the controller for correct fastening;
- Make sure that the power supply is off and that it is not turned on during the controller installation;
- Read the present manual before installing and using the controller;
- Use adequate Personal Protective Equipmenet (PPE);
- For application at sites subject to water spills, such as refrigerated counters, install the protecting vinyl
supplied with the controller;
- For protection under more critical conditions, we recommend the Ecase cover, which we make available
as an optional item (sold separately);
- The installation procedures should be performed by a qualified technician.
3. APPLICATIONS
• Beverage displays; • Reach-in coolers;
• Refrigeration counters;
• Up right freezers.
4.TECHNICAL SPECIFICATIONS
Power supply
Approximate consumption
Setpoint Temperature
Operating Temperature
Operating humidity
Maximum current per output
Digital input
Maximum dimensions (**) (mm)
Cutouts dimensions (mm)
(*) Admissible variation in relation to the voltage rating.
(**) Maximum dimensions without connectors.
5. INDICATORS AND KEYS
Refrigeration indicator LED
Light indicator LED
Power-saving mode indicator LED
Quick Access
Menu Key (Flatec)
Set Key
e
MT-444
6. WIRING DIAGRAM
Image I - Connection 115 Vac
DIG
1 2 3 4
9 10 11 12 13 14 15 16 17
5 6 7 8
LIGHT FAN
Image III - Connection 12 Vac/dc
DIG
1 2 3 4
9 10 11 12 13 14 15 16 17
5 6 7 8
LIGHT
12 Vac/dc
MT-444
Buzzer
Connector Power-saving On/off
for quick mode light
coupling
MT-444E Fit: 115 or 230Vac ±10%(*) (50/60 Hz)
MT-444EL Fit: 12 or 24Vac/dc +10%(*)
3.4 VA
- 50 to 75°C (-58 to 167°F)
-10 to 50°C / 14 to 122°F
10 to 90% RH (without condensation)
COMP: 12(8)A / 240Vac 1HP
DEFR: 3A / 240Vac 720W
FAN: 5(3)A / 240Vac
LIGHT: 5(3)A / 240Vac
input for open-door detection (dry contact type)
76 x 34 x 77 (WxHxD)
X = 71±0,5 Y = 29±0,5 (see Image V)
Fan indicator LED
Defrost indicator LED
Temperature unit indicator LED
Image II - Connection 230 Vac
DIG
1 2 3 4
5 6 7 8
DEFR COMP
115 Vac
Image IV - Connection 24 Vac/dc
DIG
1 2 3 4
5 6 7 8
FAN DEFR COMP
Loads supply
e
Fit
IP 65
FRONT
Functions Control Serial Protection
lock functions Programming level
shutdown
NEW FIT CONNECTION SYSTEM (QUICK COUPLING)
e
Fit
Signal connection
with lock
6.1. Temperature sensor connection
- Connect the sensor S1 wires to terminals "1 and 2" and wires sensor S2 to terminals "3 and 4": the
polarity is not relevant.
- Length of the sensor cables can be increased by user himself to up to 200 meters, using a PP 2x24 AWG
cable.
6.2. Recommendations of IEC60364 standard
a) Install overload protectors in the controller supply.
b) Install transient suppressors – suppressor filter RC – in the circuit to increase the service life of the
controller relay. See connection instructions of the filter on the previous page.
c) The sensor cables may be together, but not in the same conduit where the power supply of the
controller and/or of the loads passes through.
Upper key
Lower key
9 10 11 12 13 14 15 16 17
LIGHT FAN DEFR COMP
230 Vac
9 10 12 13 14 15 16 17
LIGHT FAN DEFR COMP
Loads supply
24 Vac/dc
evolution
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M T- 44 4 M T- 44 4
E251415
Connection block for
power outputs
IMPORTANT
It is essential to use the correct
tools in order to avoid damages
to the instrument's connection
terminals:
Controller power supply
Use the pins according to table below, considering the set version:
Pins MT-444E Fit
9 and 10 115 Vac
9 and 11 230 Vac
The sensor S1 must be in the ambient.
The sensor S2 must be placed in the evaporator
through metallic cramp.
MT-444EL Fit
12 Vac/dc
24 Vac/dc