Eliwell EZ-HT User manual

Electronic controllers for refrigeration units

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)

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

in.

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

23 910

D.I.

Pb1

(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

23 67 89

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:

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

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

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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