Eliwell EWRC 500 NT, EWRC 300 NT Quick Start Manual

EWRC 300/500 NT

Controllers for static and ventilated cold rooms

English

QUICK START

INTRODUCTION

The Coldface EWRC 300/500 NT series controls the temperature of a static or ventilated cold room.
The instrument controls positive and negative cold rooms and is capable of managing a double evapo­rator and condenser probes.
Coldface has 3 or 5 configurable relays depending on the model, 2(3) digital inputs configurable for
door switch or other devices. Models are available with clock with yearly calendar and HACCP event log­ging. Connection to TelevisSystem / Modbus is possible using the optional module plug-in RS485.
The container is used to install a magnetothermal switch or power contactor.
This summary document contains basic information about the standard models EWRC 300/500 NT.
For further information and different configurations, refer to the complete user manual cod. 9MA10258
downloadable free of charge from www.eliwell.com.

NAVIGATION DIAGRAM

Display alarms

if active

Display HACCP alarms

if function active

1 sec

English

Manual

defrost

rHC reset HACCP alarms

rSE active Set reduced

MECHANICAL INSTALLATION

3 sec

1 sec

Functions Menu

LOC keypad lock

rPA Pressure switch

rEd disable HACCP

function ON / OFF

Info

System

Turns light

on/o

Turns instrument

on/o

1 sec

3 sec

display probe

value

Pb1

-20.6

rtc

18.55

SET

-18.9

USr

inS

display probe

value

Pb2

-20.6

set time

and date

modify SetPoint

value

diF

2.0

CPr

- - -

conrm with

see manual

SetPoint & Probes

Parameters

modify value

conrm with

116

[UM] mm

A B

235

C

• Take out the 4 screws supplied and
then open the cover.

• Drill holes for the high and low volt­age cable glands on the sides of the
backplate, as shown.

• Check that the cables are inside the
box.

• Use suitable cable glands and/
or conduit glands that guarantee an
airtight seal for all wiring.

See cutout at last page.

• Drill 4 holes (see A...D) in the wall and
fix the backplate using 4 screws (not
supplied) suited to the wall thickness.

• Insert plug covers TDI 20 (accessory
available on request)

• Close the door and screw on the 4
cover screws taking care that the hinges
are flush and do not interfere with the
closure of the cover.

EWRC 300/500 NT 2 - EN

D

87

ELECTRICAL CONNECTIONS

Output relay (default settings)

• OUT1 relay 1 = Compressor
(or liquid line valve)

To switch between NTC/PTC probe types use parameter
H00. SWITCH OFF AND RESTART THE INSTRUMENT
after making the change.

• OUT2 relay 2 = Defrost

• OUT3 relay 3 = Evaporator fan

• OUT4 relay 4 = Light (EWRC 500 NT only)
OUT1-4 common-line max 18 A

• OUT5 relay 5 = Alarm/AUX (EWRC 500 NT only)

Probe inputs (default settings)

• Pb1 = NTC cold room probe

• Pb2 = NTC defrost end probe

• Pb3 = Not configured

Digital Inputs (default settings)

• DI1 = Door switch

• DI2 = not configured

• DI3 = not configured

Serial ports

• TTL for connection to UNICARD / Copy Card / MFK

• TTL for connection to TelevisSystem

• RS485 available ONLY with optional Plugin module
for connection to TelevisSystem / Modbus.

Important! Make sure the appliance is switched off before working on the electrical connections.

• Probe and digital inputs, OUT5 relay: screw-on terminals pitch 5.01: electric cables with max. cross-section

2.5 mm2 (only one wire per terminal for power connections).

• Power supply and relay OUT1..OUT4: screw-on terminals pitch 7.62: electric cables with max. cross-section
4mm2 (only one wire per terminal for power connections).

English

UNICARD

ELIWELL

ELIWELL

Yellow cable

COPY CARD

MFK

RS485

OPTIONAL

EWRC300/500 NT

DISPLAY

EWRC 500NT

OUT1 OUT2 OUT3 OUT4 OUT5

18 A max

only

COM

NONC

18 19 20 2117

1 2 3 4 5 6 7 8

GND GND GND+ +

+

+

PB1 PB2 DI2 DI1

PB3/DI3

230 Vac

L

N

H21

H22 H23 H24 H25

161514131211109

3 - EN EWRC 300/500 NT

MODELS WITH COVER AND INSTALLED MINIATURE CIRCUIT BREAKER
EWRC 500 NT BREAKER | EWRC 500 NT 4-DIN

The versions with front door allow direct access to the switch miniature circuit breaker or to the top of the device

English

installed on the DIN rail mounted inside.
To open the front door, use both hands as shown above. Apply a slight pressure with your thumbs on top to
release the side flaps. Simultaneously with the index finger gently pull the door toward you.
In versions provided with the miniature circuit breaker, the installer must connect it to the power supply of the
electronic board through the wiring harness included in the packaging.
The wiring diagram is shown in the figure below.
In versions with transparent front door, the omega DIN rail is always available and already installed.
You can mount up to a maximum of 4 DIN modules, including 2DIN miniature circuit breaker when present.
The DIN housing is easily expandable from 2 to 4 DIN exploiting the pre-drilling barriers as shown in the top right.

EWRC500 NT BREAKER

OUT1 OUT2 OUT3 OUT4 OUT5

COM

NONC

18A max

18 19 20 2117

1 2 3 4 5 6 7 8

GND GND GND+ + +

PB1

PB2 DI2 DI1

+

H21

PB3/DI3

L

N

230 Vac

H22 H23 H24 H25

EWRC 300/500 NT 4 - EN

161514131211109

DISPLAY

%RH

1

2 3 4 5 6 7 8

LEDS

3-FIGURE UPPER DISPLAY

A

plus the - sign

Display:

• Operating value

B

• parameters label

• alarms, functions

if Upper display

C

it means that the value of the

blinking

Lower Display can be modified

D

E

F

4-FIGURE LOWER DISPLAY

Display:

• parameters value

• probe value

• function state

HACCP models

• time

English

N. LEDS Colour description

17 RH amber not used

18 TIME amber access in case of time display or editing

19 DATA amber access in case of date display or editing

10

11

12

9

13

14

15

16

ALARMS

17

%RH

18

19

No. LED Colour ON

1 POWER SUPPLY green Power supply ON / Power supply OFF

2 ENERGY SAVING amber Energy saving ON / Energy saving OFF

3 NIGHT & DAY amber Night & Day ON / Night & Day OFF

4 HACCP amber HACCP menu / /

5 DEEP COOLING (DCC) amber Drip cooling cycle ON / Drip cooling cycle OFF

6 PUMP DOWN amber Compressor Pump Down ON / Compressor Pump Down OFF

9 COMPRESSOR amber Compressor ON delay Compressor OFF

10 DEFROST 1 amber defrost coil drainage No defrost

11 EVAPORATOR FANS amber Fans ON forced ventilation Fans OFF

12 DEFROST 2 amber defrost coil drainage No defrost

13 HACCP ALARM red HACCP alarm Not displayed No alarm

14 AUXILIARY (AUX) amber AUX ON / AUX OFF

15 LIGHT amber Light ON / Light OFF

16 CONDENSER FANS amber Fans ON / Fans OFF

Alarms LED 7 LED 8

ALARM Red SEE "ALARMS TABLE" page 11”

PANIC Red --- ---

LEAK DETECTOR

PANIC +

LEAK DETECTOR

(1) = As long as the Panic alarm persists it will not be possible to mute the buzzer from the keypad.

Colour

BLINKING

ON: function/alarm ON; OFF: function/alarm OFF

Buzzer

Red

Red ---

LED Buzzer

...

OFF

Off

---

(1)

5 - EN EWRC 300/500 NT