Eliwell EZ-HT Manuale utente
Electronic controllers for refrigeration units
EN
EZ-HT / EZ-MT / EZ-LT
STAND-BY (ESC) - ON/OFF
Press and release
• Returns to the previous menu level
• Confirms parameter value
Press for at least 5 sec
• Activates the Standby function (when outside the
menus)
UP
Press and release
• Scroll menu items
• Increases values
Press for at least 5 sec
• Activates the Manual Defrost function
DOWN
Press and release
• Scroll menu items
• Decrease values
Press for at least 5 sec
• Function can be configured
by the user (par. H32)
SET (ENTER)
Press and release
• Displays alarms (if active)
• Opens Machine Status menu
Press for at least 5 sec
• Opens Programming menu
• Confirm commands
KEYS
EZ-HT / EZ-MT / EZ-LT USER INTERFACE
Reduced SET / Economy LED
Flashing: reduced set active
Off: otherwise
Fans LED
Permanently on: fans active
Off: otherwise
Compressor LED
Permanently on: compressor active
Flashing: delay, protection or activation
blocked
Off: otherwise
Defrost LED
Permanently on: defrost active
Flashing: activated manually or from DI.
Off: otherwise
Allarm LED
Permanently on: alarm active
Flashing: alarm acknowledged
Off: otherwise
°F LED
Permanently on: °F setting (dro = 1)
Off: otherwise
°C LED
Permanently on: °C setting (dro = 0)
Off: otherwise
NOT USED
LEDS
MOUNTING - DIMENSIONS
The device is designed for panel mounting. Drill a 71x29 mm (2.80x1.14 in.) hole and insert the instrument; secure it with the special brackets
provided. Do not install the device in places subject to high humidity and/or dirt; it is intended for use in sites with ordinary class of pollution.
Keep the area around the instrument cooling slots adequately ventilated.
29 mm
76.4 mm - 3.01 in.
35 mm - 1.38 in.
1.14 in.
71 mm - 2.80 in.
70 mm - 2.75 in.
59 mm - 2.32 in.
ELECTRICAL CONNECTIONS
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH
• Disconnect all power from all equipment including connected devices, prior to removing any covers or doors, or installing or
removing any accessories, hardware, cables, or wires.
• Always use a properly rated voltage sensing device to confirm the power is off where and when indicated.
• Replace and secure all covers, accessories, hardware, cables and wires.
• Check the earthing connections on all earthed devices.
• Use only the specified voltage when operating this device and any associated products.
Failure to follow these instructions will result in death or serious injury.
DANGER
LOOSE WIRING CAUSES ELECTRIC SHOCK
Tighten connections in conformance with the torque specifications.
Failure to follow these instructions will result in death or serious injury.
The table below displays the type and the size of cables for disconnectable terminals with pitch 5.00 mm (0.197 in.) or 5.08 mm (0.2 in.).
Ø 3.5 mm (0.14 in.)
mm2
AWG
0.2…2.5
24…13
0.2…2.5
24…13
0.25…2.5
22...13
2 x 0.25…1
2 x 22…18
2 x 0.2…1.5
2 x 24…16
2 x 0.2…1
2 x 24…18
2 x 0.5...1.5
2 x 20...16
mm
in.
7
0.28
C0.5...0.6
4.42...5.31
N•m
lb-in
0.25…2.5
22...13
DANGER
POTENTIAL OF OVERHEATING AND FIRE
• Do not use with loads other than those indicated in the technical specification.
• Do not exceed the maximum permitted current; for higher loads, use a contactor with sufficient power capacity.
Failure to follow these instructions will result in death or serious injury.
This device has been designed to operate outside of any dangerous location.
Only install this device in zones known to be free of hazardous atmosphere.
DANGER
POTENTIAL FOR EXPLOSION
Install and use this equipment in non-hazardous locations only.
Failure to follow these instructions will result in death or serious injury.
Electrical equipment should be installed, operated,serviced, and maintained only by qualified personnel.
No responsibility is assumed by Eliwell for any consequences arising out of the use of this material.
WARNING
UNINTENDED EQUIPMENT OPERATION
• Use appropriate safety interlocks where personnel and/or equipment hazards exist.
• Install and operate this equipment in an enclosure appropriately rated for its intended environment.
• Power line and output circuits must be wired and fused in compliance with local and national regulatory requirements for the rated
current and voltage of the particular equipment.
• Do not use this equipment in safety-critical machine functions.
• Do not disassemble, repair, or modify this equipment.
• Do not mount devices in extremely damp and/or dirt-laden areas.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
WARNING
UNINTENDED EQUIPMENT OPERATION DUE TO CONNECTION
Signal leads (probes, digital inputs, communication and the signal electronic supply) must be routed separately from power and supply
cables.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
Probes have no connection polarity and can be extended using a regular bipolar cable (note that the extension of the probes affects the EMC
electromagnetic compatibility of the instrument: pay extreme attention to wiring).
CONNECTION
N
L
23 910
D.I.
Pb1
41
1
(thermostat)
TTL
Power Supply
EZ-HT TERMINALS
2-3 Compressor relay
3-4 Power supply input (230 Vac)
N-L Power supply (230 Vac)
9-10 Pb1 probe
10-11 Digital input
TTL TTL input
1
N
L
23 67 89
10
D.I.
Pb1
45 11
Pb2
(evaporator)
(thermostat)
TTL
Power Supply
EZ-MT/EZ-LT
TERMINALS
1-3 Fans relay
2-3 Compressor relay
5-6-7 Defrost relay
3-4 Power supply input (230 Vac)
N-L Power supply (230 Vac)
8-10 Pb2 probe
9-10 Pb1 probe
10-11 Digital input
TTL TTL input
Classification:
Electronic automatic control (not safety) device for incorporation
Mounting:
Panel mounting with 71x29 mm (2.80x1.14 in.) drilling template
Type of action: 1.B
Pollution class: 2
Insulation material group: IIIa
Overvoltage category: II
Nominal pulse voltage: 2500 V
Temperature: Use: –5 … 55 °C (23 ... 131 °F) - Storage: –30 … 85 °C (-22 ... 185 °F)
Power supply: 230 Vac (±10%) 50/60 Hz
Consumption:
4 VA max
Digital output (relay): Refer to the label on the device
Fire resistance category: D
Software class:
A
NOTE: check the power supply specified on the instrument label; contact our Sales Office for power supply and relay ratings.
TECHNICAL DATA (EN 60730-2-9)
FURTHER INFORMATION
Input Characteristics
Display range: NTC: –50.0 ... 110 °C (-58.0 ... 230 °F) (on 3-digit display with ±sign)
PTC: –55.0 ... 140 °C (-67.0 ... 284 °F) (on 3-digit display with ±sign)
Accuracy: Better than 0.5 % of full-scale +1 digit
Resolution: 0.1 °C / °F
Buzzer: Depending on model
Analogue Inputs: EZ-HT: 1 NTC/PTC Input - EZ-MT / EZ-LT: 2 NTC/PTC input
Digital input: 1 D.I. voltage free
Output Characteristics
Digital output:
MODEL DEFAULT EN60730 (max 250 Vac) UL60730 (max 120 Vac) UL60730 (max 240 Vac)
EZ-HT Compressor 12(8) A 16 FLA - 96 LRA 12 FLA - 72 LRA
EZ-MT /
EZ-LT
Compressor 12(8) A 16 FLA - 96 LRA 12 FLA / 72 LRA
Defrost NO 8(4) A - NC 6(3) A NO 8 A - NC 6 A resistive
1/8 HP
NO 8 A - NC 6 A resistive
1/2 HP
Fan 5(2) A 3 A resistive
1.4 FLA / 7.5 LRA
3 A resistive
1.4 FLA / 7.5 LRA
Mechanical Characteristics
Housing: PC+ABS UL94 V-0 resin casing, polycarbonate window, thermoplastic resin keys
Dimensions: Front: 76.4x35 mm (3.01x1.38 in.); depth: 59 mm (2.32 in.) (without terminals)
Terminals: Screw terminals for wires with cross-section of 2.5 mm2 (13 AWG)
Connectors: TTL for connection to Copy Card (maximum lenght = 3 m (9.84 ft))
Humidity: Use / Storage: 10 ... 90 % RH (non-condensing)
Regulations
Food Safety: The device complies with standard EN13485 as follows:
• suitable for storage
• application: air
• climate range A
• measurement class 1 in the range -25 ... 15 °C (-13 ... 59 °F) (*)
(* exclusively using Eliwell probes)
NOTE:The technical specifications stated in this document regarding measurement (range, accuracy, resolution, etc.) refer strictly to the
instrument and not to any accessories provided, such as the probes.
DIAGNOSTICS
Alarms are always indicated by the buzzer (if present) and the alarm icon . To switch off the buzzer, press and release any key; the corresponding
icon will continue to flash.
N.B.: If alarm exclusion times have been set the alarm will not be signalled.
• E1: if the Pb1 probe is in error, the indication E1 will appear on the display.
• E2: if the Pb2 probe is in error, the indication E2 will appear on the display. (EZ-MT / EZ-LT only).
ALARMS
Label Description Cause Effects Remedy
E1
Pb1 probe
inoperable
(Cold room)
• Measured values are outside
operating range
• Probe inoperable/short-circuited/open
• Display label E1
• Alarm icon permanently on
• Disable max/min alarm controller
• Compressor operation based on
parameters Ont and OFt
• Check probe type (par. H00)
• Check probe wiring
• Replace probe
E2
Pb2 probe
inoperable
(Defrost)
• Measured values are outside
operating range
• Probe inoperable/short-circuited/open
• Display label E2
• Alarm icon permanently on
• The Defrost will end due to Timeout (dEt)
• Check probe type (par. H00)
• Check probe wiring
• Replace probe
AH1
Pb1 HIGH
Temperature
alarm
Value read by Pb1 > HAL after time of
tAO (see 'MAX/MIN TEMP. ALARMS')
• Recording of label AH1 in folder AL
• No effect on regulation
Wait until value read by Pb1
returns below HAL
AL1
Pb1 LOW
Temperature
alarm
Value read by Pb1 < LAL after time of
tAO (see 'MAX/MIN TEMP. ALARMS')
• Recording of label AL1 in folder AL
• No effect on regulation
Wait until value read by Pb1
returns above LAL
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