Evikon PluraSens E2618 Series Manuale utente

PluraSens®

Refrigerant Transmitter

E2618-HFC

User Manual

E2618-HFC Rev 09.03.2021
Table of contents
Hydroﬂuorocarbons 3
Speciﬁcations 5
Product description 6
Safety requirements 6
Operating conditions 6
Installation guidelines 7
Wall mount version 7
Duct mount version 7
Mounting dimension 8
Sensor probe handling 9
Gas sensor replacement procedures 9
Electrical connections 10
Operation 11
Maintenance 11
Calibration 11
Delivery set 12
Order code for E2618-HFC options 12
Conﬁguring 13
Return to default settings 13
Modbus RTU Communication 14
RS485 communication interface 14
Communication parameters 14
Modbus holding registers 14
Warranty 18
Manufacturer contacts 18
2

E2618-HFC Rev 09.03.2021

Hydroﬂuorocarbons

HFCs are relatively non-ﬂammable, chemically stable, and nonreactive.

Classiﬁcation of halocarbon refrigerants

Group

Refrigerants

Chloroﬂuorocarbons (CFC)

R11, R12

Hydrochloroﬂuorocarbons

(HCFC)

R22, R141b, R142b

Hydroﬂuorocarbons (HFC)

R32, R125, R134a, R143a

Hydroﬂuorooleﬁns (HFO)

R 1234ez, R1234yf, R1336mzz

Chlorine containing refrigerants (CFC and HCFC) are considered to be damaging to the ozone layer

and contributing to the greenhouse effect. According to the Montreal Protocol, chlorine-containing

halocarbons should be completely dismissed and their manufacturing closed down.

Hydroﬂuorocarbons (HFC) contain no chlorine and are safer for the environment. Now

hydroﬂuorocarbons are the most commonly used halocarbon refrigerants.

Hydroﬂuorooleﬁns (HFO) is the last generation of refrigerants, more environmentally friendly than

HFCs, but moderately ﬂammable (A2L Class).

Properties of selected halocarbons

Name

Type

Components

Components weight %

Boiling point

R12

CFC

CCl2F2

100

−29.8 °C

R22

CFC

CHClF2

100

−40.8 °C

R125

HFC

CHF2CF3

100

−48.5 °C

R134a

HCFC

CF3CH2F

100

−26.2°C

R143a

HCFC

CF3CH3

100

-47.5 °C

R32

HFC

CH2F2

100

−52 °C

R1234yf

HFO

2,3,3,3-Tetraﬂuoropropene

100

-30 °C

R1234ze

HFO

1,3,3,3-Tetraﬂuoropropene

100

-19 °C

R404a

mixture

R125, R143a, R134a

44:52:4

−47.8 °C

R407c

mixture

R32, R125, R134a

23:25:52

−43 °C

R410a

mixture

R32, R125

50:50

−48.5 °C

Overexposure may cause dizziness and loss of concentration. At higher concentrations, CNS

depression and cardiac arrhythmia may result from exposure. Vapors displace air and can cause

E2618-HFC Rev 09.03.2021

asphyxiation in conﬁned spaces. At higher temperatures (>250°C) decomposition products may

include hydroﬂuoric acid (HF) and carbonyl halides.

An escape of refrigerant through a leak may damage the refrigerating facilities.

E2618-HFC Rev 09.03.2021

Speciﬁcations

Sampling method

Diffusion

Sensor type

Metal oxide semiconductor (NDIR on demand)

Typical detection range

0...1000 ppm

Resolution / digital unit

1 ppm

Response time T90

<120 s

Sensor lifetime

> 5 years

Calibration interval

12 months

Signal update

Every 1 second

Load resistance

RL< (Us - 2 V) / 22 mA for 4-20 mA

RL> 250 kOhm for 0-10 V mode

Digital interface

RS485, Modbus RTU protocol

No galvanic isolation

Power supply options

11...30 VDC or 24 VAC

Power consumption

< 2 VA

Analog outputs

2 × 4-20 mA / 0-10 V, user settable

Outputs assignment

OUT1 2 gas; OUT2 2 gas

Cable connections

Screwless spring-loaded terminals

Enclosure

Grey ABS, wall or duct mount, protection class IP65

Dimensions

H82 × W80 × D55 mm

CE marking

According to 2014/30/EU and 2014/35/EU, EN 50491-4-1:2012

EN 61000-6-3:2020, EN 61326-1:2013(EMC, emissions)

EN 61000-6-1:2019, EN 61000-6-2:2019(EMC, Immunity)

EN 60079-29-1:2016, EN 60079-29-2:2015 and EN 60079-29-3:2014

Operating conditions

-30...+60 °C

<95% RH non-condensing, 0,9...1,1 atm

Explosion-safe areas

Normal ambient oxygen level

Avoid strong mechanical shock, vibrations, or EMI

Avoid exposure to corrosive gases or silicone-containing products

Other options

Remote probe

Protection IP65, default cable length 3.0 m;

max height 80 mm, max diameter 65 mm

E2618-HFC Rev 09.03.2021

Product description

E2618 series transmitters belong to the PluraSens®family of multifunctional measurement

instruments. The instruments utilize gas sensors of various types with excellent

repeatability, stability, and long lifetime.

E2618 series provide two independent analog outputs OUT1 and OUT2, user-selectable to

4-20 mA or 0-10 V, proportional to the chosen scale for gas concentration. RS485 Modbus

RTU digital communication interface allows easy instrument conﬁguration and integration

into various automation systems.

Remote probe and duct mount versions are available.

The version of your transmitter is marked on the package. If

⚠

symbol is marked on the

product, consult the documentation for further information.

Safety requirements

Misuse will impair the protection of the product. Always adhere to the safety provisions

applicable in the country of use.

Do not perform any maintenance operation with the power on. Do not let water or foreign

objects inside the device.

Removal of the PCB from the enclosure voids the warranty. Do not touch the electronic

components directly, as they are sensitive to static electricity.

Connection diagrams can be found in the electrical connections section. The device might

not perform correctly or be damaged if the wrong power supply is connected.

External circuits connected to the equipment should have suﬃcient insulation rating

according to the environmental conditions and equipment power.

A disconnecting device that is marked as such and easily accessible should be included in

the installation of this product.

Operating conditions

The device should be used both in a non-hazardous area and in a basic electromagnetic

environment, where the latter is deﬁned in EN 61326-1. Avoid strong mechanical shock and

vibrations. Avoid corrosive atmosphere and areas highly contaminated with dust, oil mist,

etc. Keep the instrument away from direct sunlight. A sudden temperature or humidity

change might affect the sensitivity of the sensor.

E2618-HFC Rev 09.03.2021

Installation guidelines

Before proceeding with the installation it is mandatory to read the Safety requirements

section and make sure to comply with all listed instructions. Installation standards EN

60079-29-2 and EN 45544-4 are also recommended for further instructions and related

information about the installation. During the installation of the transmitter the following

points must be considered:

●Application (the instrument is intended for leakage control.)

●Properties of the space under investigation (room geometry, direction, and

velocity of airﬂows, etc.),

●Halocarbons are heavier than air and tend to sink. The sensor should be placed

near the ﬂoor.

●The device should be accessible for maintenance and repair.

For early leakage detection install the sensor as close as possible to the potential leakage

sources (ﬂanges, valves, pressure reducers, pumps, etc.), taking into consideration other

points listed above.

For general area monitoring without deﬁnite leakage sources, the detectors should be

distributed evenly in the room.

For personal safety control, the detectors are installed in the breathing zone (at the height

of the head of people or animals). The recommended sensor position is vertical, pointing

downwards.

Wall mount version

Unscrew four lid screws and detach the lid from the transmitter. Attach the device to a wall

with screws passing through mounting holes (for dimensions see the drawing in the next

section).

Duct mount version

Cut a hole with a diameter of 36...45 mm in the air duct at the chosen mounting place.

Place the rubber ﬂange aligning the holes in the ﬂange and the air-duct and ﬁx the ﬂange

with four self-tapping screws. Pass the sensor probe through the ﬂange and adjust it to the

appropriate depth. Unscrew four lid screws and detach the lid from the transmitter.

E2618-HFC Rev 09.03.2021

Mounting dimension

Wall mount version

Duct mount version

E2618-HFC Rev 09.03.2021

Sensor probe handling

The wall mount version of the transmitter is available with a remote probe (see drawing

below for dimensions). The remote probe is connected to the main unit with a shielded

cable. The default remote probe cable length is 3 m.

A) Wall mount remote probe with ﬁxing clamp (default version),

B) Remote probe with rubber ﬂange and three self-tapping screws (on request)

The sensor probes of all types are equipped with a hydrophobic microporous PTFE ﬁlter to

protect the sensor from dust, dirt, and water drops. The ﬁlter should be replaced if it gets

strongly contaminated. To replace the PTFE ﬁlter, unscrew the sensor head cap and

remove the old ﬁlter. Place a new ﬁlter into the cap and tighten it again.

NOTE! Never stab or press the ﬁlter near its center where the sensor is located since this

may damage the sensor. Do not remove the ﬁlter as it may cause the device to show

incorrect values and/or break the sensor.

The recommended orientation of the sensor probe is vertical with the sensor tip pointing

downwards. This prevents the possible accumulation of condensed water on the sensor

protection ﬁlter.

Gas sensor replacement procedures

1. Remove the sensor head cap from the device,

2. Remove the PTFE ﬁlter (if it is not removed within the cap),

3. Remove the O-ring rubber,

4. Detach the electrochemical sensor from the device,

5. Insert the new electrochemical sensor inside,

6. Put back the O-ring rubber, PTFE ﬁlter, and the head cap, respectively.

E2618-HFC Rev 09.03.2021

Electrical connections

Unscrew four lid screws and detach the lid from the device. Use the M16 cable gland to let

in cables of the power supply and of the external devices. Attach the power cable to the

device without turning it on. Using the connection diagram below, connect the analog

outputs and digital interface terminals to the relevant devices according to your tasks.

PCB without PSU and relays

The screwless quick connect spring terminals on the E2618 series devices are suitable for

a wide range of wires with a cross-section of 0.2...1.5 mm2. We recommend to strip the

wire end by 8...9 mm and use wire end sleeves.

To connect the wire, insert the wire end into the terminal hole. To disconnect, push the

spring-loaded terminal lever, pull the wire out, and release the lever.

Use a twisted-pair cable, e.g. LiYY TP 2×2×0.5 mm2or CAT 5, to connect the device to the

RS485 network. A and B on the device represent DATA+ and DATA- respectively, polarity

must be respected when connecting to an external RS485 network.

Both analog outputs can be independently changed between 4-20 mA and 0-10 V type

using jumpers J1 (OUT1) and J2 (OUT2). By closing pins on a speciﬁc jumper the related

output is 0-10 V, with an open jumper the output is 4-20 mA. Power restart is required after

changing the position of the jumpers.

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