Raychem EM4-CW-Cable Instrukcja instalacji

EM4-CW-CABLE

Electrical heating cable for ramp & accessway heating

SYSTEM EM4-CW-HEIZKABEL

Elektrisches Heizkabel fur Eis- und Schneefreihaltung von Freiflächen

CÂBLE EM4-CW

Câble de traćage électrique pour rampes et voies d’accès

SYSTEM EM4-CW

Elektryczny przewód grzejny do ochrony przed

oblodzeniem i zaleganiem śniegu na rampach i podjazdach

КАБЕЛЬ EM4-CW

Электрообогрев пандусов и подъездных путей

EM4-CW-CABLE

Elektrische verwarmingskabel voor opritten en toegangen

EM4-CW VÄRMEKABEL

Värmekabel (400 V) för snösmältning av markytor

EM4-CW-KABEL

Elektrisk varmekabel (400 V) for varming av ned/oppkjørsel og adkomstsvei

EM4-CW LÄMPÖKAAPELIELEMENTTI

400 V:n lämpökaapelielementti ulkoalueiden sulanapitoon

EM4-CW-Cable

2 | nVent.com

EM4-CW-Cable

Installation Manual ....................................................................................................................................... 5

System EM4-CW-Heizkabel

Installations- und Betriebshandbuch .......................................................................................................... 22

Câble EM4-CW

Manuel d'installation ................................................................................................................................... 37

System EM4-CW

Instrukcja montażu i obsługi ....................................................................................................................... 52

EM4-CW-Cable

Руководство по установке и эксплуатации ......................................................................................... 69

EM4-CW-Cable

Installatiehandleiding .................................................................................................................................. 86

EM4-CW värmekabel

Installationshandbok ................................................................................................................................ 101

EM4-CW-kabel

Installasjonsmanual .................................................................................................................................. 116

EM4-CW lämpökaapelielementti

Asennusohje .............................................................................................................................................. 131

nVent.com | 3

1

Freiflächen-Heizkabel

2

Anschlusskasten

3

Steuerungseinheit Temperatur- und

Feuchtefühler

4

Fühlerkabelschutzrohr

5

Kaltleiterschutzrohr

6

Anschlusskasten

7

Schaltschrank

8

Steuerungseinheit

9

Versorgungsleitung

10

Anschlusskasten

11

Kaltleiter - Heizkabelanschluss

12

EM-CW-Heizkabel

Rinnenbeheizung

13

Endabschluss

14

8BTV2-CT Heizkabel

15

Verbindungsgarnitur

6

7

12

11

9

8

2

1

3

5

4

13

14

15

10

1

Ramp heating cable

2

Junction box

3

Temperature + moisture sensor

4

Sensor lead conduit

5

Cold cable conduit

6

Junction box

7

Control panel

8

Smart control unit

9

Supply lead

10

Junction box

11

Cold cable - heating cable connection

12

EM4-CW heating cable

Drain trace heating system

13

End seal

14

8BTV2-CT heating cable

15

Connection kit

4 | nVent.com

1

Кабель для обогрева пандуса

2

Соединительная коробка

3

Датчик температуры и влажности

4

Кабелепровод датчика

5

Кабелепровод холодного ввода

6

Соединительная коробка

7

Панель управления

8

Устройство управления

9

Подвод питания

10

Соединительная коробка

11

Соединительная муфта

12

Греющий кабель EM4-CW

Система обогрева дренажа

13

Концевая заделка

14

Греющий кабель 8BTV2-CT

15

Подсоединительный набор

1

Verwarmingskabel oprit

2

Aansluitdoos

3

Controle-eenheid temperatuur-/

vochtigheidssensor

4

Buis aansluiting sensor

5

Buis aansluitkabel

6

Aansluitdoos

7

Schakelkast (bedieningspaneel)

8

Besturing (sturingseenheid)

9

Voedingskabel

10

Aansluitdoos

11

Aansluiting aansluitkabel – verwarmingskabel

12

EM-CW verwarmingskabel

Verwarmingscircuit afvoergoot

13

Einddichting

14

8BTV2-CT verwarmingskabel

15

Aansluitkit

1

Câble chauffant pour rampes d’accès

2

Boîte de raccordement

3

Sonde de température et d'humidité

4

Tubage du câble de sonde

5

Tubage de sorties froides

6

Boîte de raccordement

7

Panneau de commande

8

Régulateur intelligent

9

Alimentation

10

Boîte de raccordement

11

Sortie froide – connexion de

câbleschauffants

12

Câble chauffant EM4-CW

Système de traćage de caniveaux

13

Terminaison

14

Câble chauffant 8BTV2-CT

15

Kit de connexion

1

Przewód grzejny do ogrzewania podjazdów

2

Skrzynka przyłåczeniowa

3

Czujnik temperatury i wilgotności gruntu

4

Rurka ochronna przewodu czujnika

5

Rurka ochronna przewodu zasilajåcego

6

Skrzynka przyłåczeniowa

7

Rozdzielnica sterujåca

8

Sterownik

9

Przewód zasilajåcy

10

Skrzynka przyłåczeniowa

11

Połåczenie przewodu grzejnego z przewodem

zasilajåcym

12

Przewód grzejny EM-CW

System ogrzewania odwodnienia liniowego

13

Zestaw zakończeniowy

14

Przewód grzejny 8BTV2-CT

15

Zestaw przyłåczeniowy

nVent.com | 5

1

Rampvärmekabel

2

Kopplingsbox

3

Temperatur- och fukthaltsgivare

4

Rör för givarledning

5

Rör för kallkabel

6

Kopplingsbox

7

Automatikskåp

8

Smart reglerenhet

9

Matarkabel

10

Kopplingsbox

11

Anslutning mellan kallkabel och värmekabel

12

Värmekabel EM4-CW

Värmekabelsystem för dräneringsränna

13

Ändavslutning

14

Värmekabel 8BTV2-CT

15

Anslutningssats

1

Varmekabel for ned/oppkjørsel

2

Koplingsboks

3

Temperatur + fuktighetsføler

4

Følerledning

5

Kaldkabelledning

6

Koplingsboks

7

Betjeningspanel

8

Smartkontrollenhet

9

Tilførselsledning

10

Koplingsboks

11

Kaldkabel - varmekabelforbindelse

12

EM4-CW-varmekabel

Varmesystem for drenering

13

Endeforsegling

14

8BTV2-CT-varmekabel

15

Tilslutningsanordning

1

Ajoluiskan lämpökaapeli

2

Kytkentärasia

3

Lämpötila + kosteusanturi

4

Anturijohtimen suojaputki

5

Kylmäkaapelin suojaputki

6

Kytkentärasia

7

Ohjauskeskus

8

Älykäs säätöyksikkö

9

Syöttökaapeli

10

Kytkentärasia

11

Kylmäkaapeli – lämpökaapeli kytkentä

12

EM4-CW-lämpökaapeli

Viemärin lämmitysjärjestelmä

13

Loppupääte

14

Lämpökaapeli 8BTV2-CT

15

Kytkentäpakkaus

6 | nVent.com

L1

L2

L3

N

30 mA

PE

Circuit wiring diagram

Schaltkreisdiagramm

Schéma de câblage du circuit

Schemat połåczeniowy

Электрическая схема

Stroomkringschema

Elkretsschema

Diagram for kretsledningsnett

Kytkentäkaavio

Heating cable

Heizkabel

Câble chauffant

Przewód grzejny

Греющий кабель

Verwarmingskabel

Värmekabel

Varmekabel

Lämpökaapeli

EM4-CW - 400 Vac

Type - Length

Typ - Länge

Type - Longueur

Typ - Długość

Tип - Длина

Type - Lengte

Typ – Längd

Type – Lengde

Tyyppi – pituus

EM4-CW-xM

Conductor Resistance

Heizleiterwiderstand

Résistance du conducteur

Rezystancja w omach

Сопротивление

проводника

Weerstand geleider

Total resistans

Ledermotstand

Johtimen resistanssi

+/–10%

Rated Power

Nennleistung

Puissance nominale

Moc nominalna

Номинальная

мощность

Nominaal vermogen

Märkeffekt vid

Nominell kraft

Nimellisteho

(400 Vac)

Circuit Breaker

Absicherung

Coupe-circuit

Wyłåcznik

nadmiarowy

Автоматический

выключатель

Stroomonderbreker

Brytarstorlek vid

Kretsbryter

Johdonsuoja-

automaatti

(400 Vac)

EM4-CW - 26 m 246 Ω 650 W 10 A

EM4-CW - 35 m 183 Ω 875 W 10 A

EM4-CW - 61 m 105 Ω 1525 W 10 A

EM4-CW - 122 m 52 Ω 3050 W 10 A

EM4-CW - 173 m 37 Ω 4325 W 16 A

EM4-CW - 211 m 30 Ω 5275 W 20 A

EM4-CW - 250 m 26 Ω 6250 W 20 A

De-energize all power circuits before installation or servicing.

Alle Stromkreise vor der Montage und vor Wartungs- und Reparaturarbeiten spannungsfrei schalten.

Mettre tous les circuits électriques hors tension avant les interventions d’installation ou de maintenance.

Przed przyståpieniem do montażu lub serwisu, odłåczyć wszystkie obwody zasilajåce.

Перед установкой или ремонтом системы электрообогрева обесточьте все силовые цепи.

Schakel alle stroomcircuits uit vóór installatie of onderhoud.

Gör alla effektkretsar spänningslösa innan något installations- eller servicearbete påbörjas.

Slå av alle strømkretser før installasjon eller service.

Poista jännite kaikista virtapiireistä ennen asennusta tai huoltoa.

nVent.com | 7

EM4-CW-CABLE

Installation Manual

General ........................................................................................................................................................... 7

EM4-CW-Cable heating system .................................................................................................................... 8

Additional items ............................................................................................................................................ 8

Layout considerations .................................................................................................................................. 9

Preparing subsurface ................................................................................................................................... 9

Cable resistance and insulation resistance test ....................................................................................... 10

Heating cable installation ........................................................................................................................... 11

Slab Preparation & Reinforcement ............................................................................................................. 12

Installing the Temperature and Moisture Sensor ...................................................................................... 15

Check the installation ................................................................................................................................. 16

Embedding Works - Concrete Pouring ....................................................................................................... 17

Top surface installation .............................................................................................................................. 18

Drain tracing system with self-regulating heating cable (8BTV2-CT) ...................................................... 18

Finishing ...................................................................................................................................................... 19

Operating ..................................................................................................................................................... 20

Trouble shooting ......................................................................................................................................... 20

GENERAL

Important

All the instructions provided in this manual must

be followed carefully to ensure that the heating

system operates correctly. The installation must

also be compliant with local electrical heating

system requirements.

Warning

The nVent RAYCHEM EM4-CW-Cable is an

electrical device which must be designed and

installed correctly. Follow all design, installation,

test and operating instructions to ensure proper

operation and to prevent electrical or fire hazard.

De-energize all power circuits before installation

or servicing.

• Keep ends of trace heaters and kit components

dry before and during installation.

• The braid shall be connected to an earth

terminal.

• The presence of a trace heating shall be made

evident by the posting of caution signs or

marking where clearly visible.

Scope

This manual focuses on the installation

of EM4-CW-Cable in screed and sand for long-

term structural stability.

nVent can supply a different series of suitable

products for laying in screed/concrete, asphalt or

other applications.

8 | nVent.com

EM4-CW-CABLE HEATING SYSTEM (1)

The heating cable “EM4-CW-Cable” is a constant

wattage heating device for a permanent

installation in concrete, screed or sand under

paving slabs.

It is a 400 Vac system regulated by a control unit.

(Control unit provided separately.)

EM4-CW-Cable is a pre-terminated and ready to

install heating cable with 1 cold lead connection

and a power output of 25 W/m of heating cable.

The cold lead cable has a length of 4 m and

should be installed in a conduit.

The minimum cable spacing is 8 cm. With 8 cm

spacing the power output will be 300 W/m².

Spacer, junction box (4) and supply

lead(9)

The plastics fixing strips (VIA-Strips-PL) maintain

the correct spacing of 8-10 cm.

Extension of the cold leads can be made via a

junction box. The connection between the control

panel and the junction box is made by a suitable

supply lead.

Controller (8)

nVent offers control units specially designed

for ramp heating applications. They incorporate

combined temperature and moisture sensors to

ensure efficient operation of the system.

Panels (7)

nVent offers a range of standard panels

specifically designed for ramp heating

applications. Each panel contains a built in

control unit, plus circuit breakers and a residual

current device (rcd).

ADDITIONAL ITEMS

Conduits (5, 6)

Conduits (not included) are required to

protectthe

• cold lead

• sensor connection lead.

Electrical Control Equipment

If nVent standard panels are not used, further

items will be required to complete the system:

• contactors

• circuit breakers

• residual current device (rcd) 30 mA.

• a controller

Storage of the cable

• Storage temperature range: –40°C to +45°C

• Store product in a clean, dry place.

Test Equipment

• 2500 Vdc insulation resistance tester (min.

500 Vdc)

• Ohmmeter

nVent.com | 9

LAYOUT CONSIDERATIONS

Area to be heated

Determine the exact area to be heated, e.g. wheel tracks. Consider the following factors:

First make sure that the area to be heated

complies with the data in the design instructions.

Establish where the junction boxes are to be

installed and check that the connection leads are

long enough.

The length is 4 m.

Thoroughly clean the substratum before starting

to install the heating mat, as sharp objects can

damage the heating cable.

The EM4-CW-Cable must not be shortened or

spliced.

Lay the heating cable right up to

the drain-off gutter.

Covered area

Heat the surfaces on which braking

will occur, e.g. before a barrier or a

magnetic card reader.

Heat the drain-

off gutter.

Heat the covered area

of the entry, as incoming

vehicles can bring in

snow.

Heat at least one

metre into the

coveredarea.

Do not run the heating cable

over expansion joints.

10 | nVent.com

PREPARING SUB-SURFACE

The heating cable should be installed on a

stable subsurface. In suspended structures

the substratum may consist of finished slabs,

prestressed concrete or a suspended structure

with poured concrete. The heating cable can be

laid on all sub-surfaces. In the case of poured

concrete, it should be ensured that the surface

is smooth and all sharp objects are removed.

Ramps on a solid substratum do not require

any additional thermal insulation. Appropriate

preparations should be made for installing the

temperature and moisture sensor.

CABLE RESISTANCE AND INSULATION RESISTANCE TEST

Testing the heating cable involves the measuring

of the conductor resistance and the cable

electrical insulation resistance. The conductor

resistance is measured with an ohmmeter.

A deviation of up to 10% from the nominal

resistance is permissible. See table on page 6.

Notes:

• Keep at least 5 cm away from

obstructions

• Avoid the sites of future penetrations

(such as drains)

Spacing

Arrange the spacing (S) of the heating cable as

shown:

For standard slab constructions:

S = 8-10 cm for concrete

S

S/2

Area to be heated

Cold lead

Conductor

Ohmmeter

Record all the measured

values on the Installation

Test Record provided.

nVent.com | 11

HEATING CABLE INSTALLATION

Keep connection end of cable dry before and during installation.

All connections and electrical testing should be carried out by a qualified electrician.

The heating cable should not be:

• cut or damaged,

• installed across expansion joints or separate concrete slabs.

Minimum cable spacing is 8 cm

The heating cable must be secured to the underlying surface to prevent movement during the

installation.

The cold lead cable should be protected in a conduit. The entire length of heating cable should be

covered by wet sand-cement mixture, screed, or dry sand depending on the selected top surface.

Ramp heating embedded in concrete / cement screed

The insulation resistance

should be measured

with the aid of a

2500 Vdc (500 Vdc

minimum) insulation

resistance tester. The

reading should be more

than 100 MΩ.

Record all the measured

values on the Installation

Test Record provided.

Cold lead

Conductor

Insulation resistance tester

Concrete / Cement

screed ground

50 mm min.

80-100 mm for

250-300W/m²

SoilConcrete / compacted

substrate

EM4-CW-Cable

Temperature and

moisture sensor

12 | nVent.com

Ramp heating with top layer of stone or paving slabs

Ramp heating embedded in concrete / cement screed Top layer asphalt

If the heating cable can not be fixed to a reinforcement mesh, the installer should use the plastic

spacer or other fixing method to keep the cable spacing consistent.

SLAB PREPARATION & REINFORCEMENT

• In the case of a concrete slab, the mesh

or reinforcement bar must be ad equately

supported so that it is not disturbed during the

concrete pour.

• The reinforcement must be positioned so that

the heating cable will be 50 mm below the

surface of the concrete.

• The reinforcement must be positioned at the

correct distance below the surface of the

concrete to within ± 1 cm.

• Where mesh is used, it must be strong enough

that it will not "droop" when walked on for the

installation of the

heating cable. Use a mesh grid of at least

50 mm. A grid spacing of 100 mm is most

practical.

• Where a reinforcement bar is used, arrange

its spacing to match the requirement of the

heating cable spacing.

Surface of concrete

50 mm

minimum

Mesh

Reinforcement support

Heating cable

Sand bed

20-30 mm

Stones / paver

(max. 8 cm)

Soil ground

60-80 mm

30-50 mm

Temperature and

moisture sensor

EM4-CW-Cable

80-100 mm for

250-300W/m²

Concrete / cement

screed ground

50 mm

SoilConcrete / compacted

substrate

EM4-CW-Cable

Asphalt layer

25 mm

Temperature and

moisture sensor

80-100 mm for

250-300W/m²

nVent.com | 13

LAY OUT AND FIXING OF HEATING CABLE

Notes:

• maintain the design spacing to

within ± 1 cm

• keep heating cable 5 cm from

edges and obstructions

• do not cross expansion joints

• avoid sites of future ground work

(kerbs, drains, etc.)

• Set the heating cable spool on a reel roller.

• Position the heating cable (with cold lead

connection installed) out to the point of the

power connection.

Warning: Do not cross over or shorten

the heating cable

• Working from the cold lead connection, fix the

heating cable to the reinforcing mesh at 300

mm intervals using cable ties (KBL-09).

• At the end of a straight run, turn the cable 180

degrees and run the cable in the opposite at

the desired spacing.

• Continue to fix the heating cable to the

reinforcing mesh at 300 mm intervals, until the

cable is completely attached and the desired

surface is appropriately covered.

Warning: Do not cross or shorten the

heatingcable

14 | nVent.com

Note: At the bend, the heating cable will stand

on its edge. This is perfectly normal and will

not effect the performance of the system.

Cable installation;

Flat or on edge

in straight runs

On edge

through bends

Installation of conduit

The conduit for the cold cable should be arranged

such that the connection between heating cable

and cold cable is fully embedded in the slab.

For mechanical protection, the cold lead should

be protected by an appropriate conduit.

Use a spacer to ensure constant spacing

of the heating cable

Laying spacing as given

Spacer

(plastic strip)

Heating cable

Minimum 80 mm

nVent.com | 15

==

50 mm

50

mm

50 mm

50

mm

Sensor

Heating

cable

Sensor housing

Concrete, asphalt

or paving bricks

Heating

cable

Conduit

• The sensor lead should be routed under the

layer with the heating cable.

• The sensor should be placed mid-way between

heating cable runs.

• The sensor lead should be protected by a

conduit (4).

Surface Sensor Filling material

Sub surface

Sensor

INSTALLING THE TEMPERATURE AND MOISTURE SENSOR

Install the temperature and moisture sensor in

accordance with the instructions supplied with

the unit. Ensure that it is supported at the correct

height.

• The sensor must be mounted vertically, even

on inclined surfaces.

16 | nVent.com

CHECK THE INSTALLATION

Check heating cable

• Visually check the heating cable for damage.

• Verify that the heating cable has been correctly

fastened to the spacers.

• Verify that the desired spacing has been

maintained and that the heating mat has been

kept away from expansion joints, sharp edges,

etc.

• Verify that the heating mat has been installed

at the correct depth.

• Visually check the connection leads for correct

installation.

Make a layout sketch

Record the layout of each circuit, with particular

reference to the position of the connection

heating cable - cold cable and the heating

cable end. (a photograph is also an acceptable

reference of the layout.)

Perform the resistance tests

Carry out the resistance tests on each circuit

to detect any damage that may have occurred

during or after installation. The insulation

resistance reading must be greater than 100 MΩ.

If the insulation resistance is less than this, the

cable may have been damaged. Where possible,

locate the fault and rectify.

Record the values for each circuit on the

Installation Test Record.

If concrete is to be poured straight away, go to

section "Concrete Pouring" (overleaf).

Protect the installation

Prevent pedestrian and vehicular traffic in the

area where the heating cable has been installed.

Avoid disturbing the reinforcing steel or mesh.

nVent.com | 17

EMBEDDING WORKS - CONCRETE POURING

Checks

Perform the following checks before the

embedding works:

• check for signs of heating cable damage

• check the cable spacing

• check the height of the heating cable

Resistance tests

Perform the resistance tests on each heating

cable circuit to detect any

damage which may have occurred after

installation.

Record the results on the Installation Test

Record.

When the concrete team arrives, have them verify

the resistance results and sign the Installation

Test Record.

Warning:

Precautions should be taken during the

concrete pour to prevent the heating cable

from being exposed to unnecessary abuse:

• Avoid excessive concrete drop

heights.

• Take care when using shovels

and rakes during the pour.

During the embedding

Monitor the insulation resistance continuously

during the pour.

If the insulation resistance drops below 100 MΩ

the heating cable may be damaged. Stop the pour

immediately. Locate the damage and repair it.

After the embedding

After completion of all concrete works,

perform the resistance tests and record the

values on the Installation Test Record.

Supplementary work

Work such as drain installation, placement of

anchor bolts and cutting of expansion joints

is done after the initial concrete pour. Consult

the drawing of the layout so that damage to the

heating cable is avoided.

It is desirable to monitor the heating cable by

insulation resistance testing during any activity

which could lead to heating cable damage.

After all such work has been completed perform

the resistance tests and record the results on the

Installation Test Record.

18 | nVent.com

TOP SURFACE INSTALLATION

Checks

Perform the following checks before

top layer installation, paving or applying the

asphalt:

• Check for signs of heating cable

damage.

• Check the spacing and below-surface depth of

the heating cable, if applicable.

Resistance tests

It is advisable to perform the resistance tests on

all the heating circuits immediately before paving

or asphalt pouring to detect any damage which

may have occurred after installation. Record

the resistances of each heating circuit on the

Installation TestRecord.

After the paving or asphalt pour

After completion of all top surface works,

perform the resistance tests and record the

values on the Installation Test Record.

DRAIN TRACING SYSTEM WITH SELF-REGULATING HEATING

CABLE8BTV2-CT

Purpose

The drain tracing system ensures that melt water

can drain away.

Note: the drain tracing circuit should be

controlled by the same control system as

the other heating circuits.

Install junction box (10)

Choose a position:

• close to the drain

• indoors if possible.

Install connection kit (15)

Terminate the 8BTV2-CT heating cable into the

junction box in accordance with the instructions

provided with the connectionkit.

Lay out the heating cable (14)

Protect the heating cable with conduit

between the junction box and the drain. Trace

the entire length of the drain to ensure that melt

water will always have

a drain-off path.

Install the end seal (14)

8BTV2-CT can be cut to length. Install the end

seal following the instructions provided with the

End Seal kit.

Perform an insulation resistance test

The insulation resistance test detects damage

to the heating cable such as cuts or punctures.

It should be carried out using a 2500 Vdc

instrument. Lower voltage instruments are

less sensitive and are not recommended. The

instrument should have a test voltage of not less

than 500 Vdc.

nVent.com | 19

Braid

2500 Vdc Insulation resistance tester

Conductors

FINISHING

Complete Sensor

Complete the installation of the sensor (where

necessary).

Install Panel and Controls

Install the electrical panels according to the

manufacturer’s instructions.

Install control units, thermostats and manual

control equipment in accordance with the

manufacturers’ instructions.

Complete Wiring and System

Follow applicable local regulations.

Proceed as follows:

• Connect one lead to the heater braid.

• Connect the other lead to both heater

conductors together.

• Apply voltage. The resistance reading must be

greater than 100 MΩ.

• If the insulation resistance is less than this,

the heater may be damaged. Where possible,

locate the fault and rectify. Record the

insulation resistance value on the Installation

TestRecord.

Install a grid over the drain to ensure that the heat

strip is protected from damage.

Note: A 30 mA residual current device (rcd)

is required for the drain tracing. Ensure that

there are no more than 60m of heating

cable connected to each 30 mA rcd.

Finishing

20 | nVent.com

OPERATION

Initial start-up

Electrical requirements

Complete all electrical testing following

applicable local codes and practices. Inspect

all wiring for conformance to design drawings.

Check for correct rating on all protection devices.

Controller checks

Check controller in accordance with the

instructions provided with the unit.

Resistance tests

Perform final resistance test to ensure that the

connection lead and supply cable have not been

damaged since installation.

General operation and maintenance

The system has no moving parts and therefore

requires minimum maintenance. Local

maintenance codes and requirements for

electrical equipment should be complied with.

Circuit breakers should be checked periodically.

Residual current devices (rcd) should be tested at

least annually.

Periodically inspect the system controls.

Operate the controls to ensure that they function

correctly.

Max. exposure temperature for heating cable:

65°C. Installer must supply operator/owner with

the layout drawing.

TROUBLE SHOOTING GUIDE

Warning: Isolate supply before working on any part of the electrical system.

Problem A : Over-current protection (circuit breaker) trips or blows

Probable causes Correction

Electrical fault at:

• connection lead

• damaged heating cable

Locate and rectify the fault and reset or replace

protection.

Protection undersized Re-establish what the current loads are going to

be and install new protection (NB: if protection

is replaced, ensure it is compatible with the

supplycable).

Defective protection Replace

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