Raychem IceStop Installation and Operation Manual for Roof ...€¦ · 7 Test Procedures 52 ......

IceStop System

INSTALLATION AND OPERATION MANUAL FOR ROOF AND GUTTER DE-ICING SYSTEMS

THERMAl MANAGEMENT WWW.PENTAIRTHERMAl.COM

ii Raychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01

Important Safeguards and Warnings

WARNING: FIRE AND SHOCK HAZARD.

IceStop roof and gutter de-icing systems must be installed correctly to ensure proper operation and to prevent shock and fire. Read these important warnings and carefully follow all the installation instructions.

•To minimize the risk of fire from sustained electrical arcing if the heating cable is damaged or improperly installed and to comply with Thermal Management requirements, agency certifications, and national electrical codes, ground-fault equipment protection must be used on each heating cable branch circuit. Arcing may not be stopped by conventional circuit breakers.

•Approvals and performance are based on the use of Raychem parts only. Do not substitute parts or use vinyl electrical tape.

•Bus wires will short if they contact each other. Keep bus wires separated.

•Connection kits and cable ends must be kept dry before and during installation.

•The black heating cable core and fibers are conduc-tive and can short. They must be properly insulated and kept dry.

•Damaged bus wires can overheat or short. Do not break bus wire strands when scoring the jacket or core.

•Damaged heating cable or connection kits can cause electrical shock, arcing or fire. Do not attempt to repair or energize damaged cable. Remove damaged sections at once and replace them with a new length using the appropriate Raychem splice kit. Replace damaged connection kits.

iiiRaychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01

Table of Contents

1 General Information 11.1 UseoftheManual 11.2 IceStopApplications 11.3 SafetyGuidelines 21.4 TypicalRoofandGutterSystem 31.5 Approvals 61.6 Warranty 6

2 Pre-Installation Checks 72.1 CheckMaterials 72.2 ConnectionKitsandAccessories 82.3 ReviewtheDesign 12

3 Heating Cable Installation 133.1 HeatingCableHandling 133.2 ProtectingtheHeatingCable 143.3 VisualInspection 143.4 HeatingCableLayout 15

4 Attachment Methods 294.1 Overview 294.2 RoofAttachmentMethods 304.3 AttachmentMethodsforOtherAreas 35

5 Control, Monitoring and Power Distribution 395.1 ControlSystems 395.2 PowerDistribution 44

6 Commissioning and Preventive Maintenance 486.1 SystemStart-upandOperation 486.2 InsulationResistance(Megohmmeter)Test 486.3 ContinuityTest 51

7 Test Procedures 527.1 Tests 527.2 InsulationResistanceTest–Test1 527.3 InsulationResistance(Megohmmeter)Test 537.4 FaultLocationTests 56

iv Raychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01

8 Troubleshooting Guide 60

9 Installation and Inspection Records 66

1Raychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01

1 General Information

1.1 Use of the ManualThismanualcoverstheinstallationofRaychemIceStoproofandgutterde-icingsystem.Themanualcoversgeneralheatingcableinstallationproceduresandspecificinstallationdetailsandshowsavailableconnectionkits.Themanualalsodiscussescontrols,testing,andperiodicmaintenance.

Thismanualassumesthattheproperroofandgutterde-icingdesignhasbeencompletedaccordingtotheRoofandGutterDe-Icing:IceStopSystemDesignGuide(H56070).

OnlytheapplicationsdescribedinSection 1.2areapprovedbyThermalManagementforIceStopsystemswhenusedwithapprovedRaychemconnectionkits.TheinstructionsinthismanualandtheinstallationinstructionsincludedwiththeconnectionkitsmustbefollowedfortheThermalManagementwarrantytoapply.ContactyourThermalManagementrepresentativeforotherapplicationsandproducts.

1.2 IceStop ApplicationsRaychemIceStopisaroofandgutterde-icingsystemthatprovidesdrainpathsforthefollowingapplications:•Roofsmadefromstandardroofingmaterials,includingshake,shingle,rubber,tar,wood,metal,andplastic.

•Guttersmadefromstandardmaterials,includingmetal,plastic,andwood.

•Downspoutsmadefromstandardmaterials,includingmetalandplastic.

TheguidedoesnotprovideinformationforusinganIceStopsystemforthefollowingapplications:•Preventingsnowmovementonroofs—IceStopwillnotkeepsnoworicefromfallingofftheroof.IceStopisdesignedtoremovemeltwater,notaccumulatedsnow.Snowfencesorsnowguardsshouldbeusedtoeliminatesnowmovement.

2 Raychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01


Forthenamesofmanufacturersofsnowguardsorsnowfences,contactyourThermalManagementrepresentative,orcontactusdirectlyat(800)545-6258.

•Meltingsnowonaroofand/orreductionofsnowload—IceStopisdesignedtoremovemeltwater,notaccumulatedsnow.

Ifyourapplicationconditionsaredifferent,orifyouhaveanyquestions,contact:Thermal Management7433HarwinDriveHouston,TX77036USATel: +1.800.545.6258Tel: +1.650.216.1526Fax: +1.800.527.5703Fax: [email protected]

1.3 Safety GuidelinesThesafetyandreliabilityofanyheat-tracingsystemdependsonthequalityoftheproductsselectedandthemannerinwhichtheyareinstalledandmaintained.Incorrectdesign,handling,installation,ormaintenanceofanyofthesystemconnectionkitscoulddamagethede-icingsystemortheroofandmayresultininadequatede-icing,electricshock,orfire.Tominimizetheserisksandtoensurethatthesystemperformsreliably,readandcarefullyfollowtheinformation,warnings,andinstructionsinthisguide.

•Importantinstructionsaremarked Important

•Warningsaremarked WARNING



1.4 Typical Roof and Gutter SystemIcedamscancausewateringressintobuildingsandgeneratedangerousicicles.AnIceStopsystemcanhelppreventicedamsandiciclesbymaintainingacontinuouspathformeltwatertodrainfromtheroof.Aslongasaheatedpathfromtherooftoasafedischargeareaismaintained,icedamswillnotform.TheIceStopsystemcanbeusedonroofsandvalleysandindownspoutsandguttersmadefromalltypesofstandardroofingmaterials,includingmetal,plastic,wood,shake/shingle,rubber,andtar.

TheIceStopsystemisintendedtoprovidedrainpaths.AtypicalsystemisshowninFigure1.



Power Connection Kits Splice Kits Attachment Kits Tee Kits

Gutter Sensor Downspout Hanger Kit End Seal Kit

Heating Cable

Lighted End

Power Distribution Panel

APS-4

SUPPLYSNOW

HEATERGROUND FAULT

GROUND FAULT

HEATER CYCLERESETTEST

HOLD ON TIME (HRS)

Snow/Ice Melting Controller

SUPPLY : 277 VAC, 50/60HZZ, 35VA

HEATER: 377 VAC, 40 AMP. MAX RESIS

USE ONLY COPPER CONDUCTORS HAVING

SUFFICIENT AMPACITY.

SEE INSTALLATION INSTRUCTIONS

WARNING

DANGER OF ELECTRICAL SHOCK OR ELCTROCUTION

Lethal voltages are present beneath this cover. Servicee by

qualified personnel only. More than one disconnect may be

required to de-energize this control for servicing.

GROUND FAULT

GROUND FAULT

HEATER CYCLE

HOLD ON TIME (HRS)

SNOW

HEATERGROUND FAULT

GROUND FAULT


HOLD ON TIME (HRS)






WARNING





APS-4

SUPPLY


Snow Controller

Figure 1: IceStop Roof and Gutter De-Icing System



Power Connection Kits Splice Kits Attachment Kits Tee Kits

Gutter Sensor Downspout Hanger Kit End Seal Kit

Heating Cable

Lighted End

Power Distribution Panel

APS-4

SUPPLYSNOW

HEATERGROUND FAULT

GROUND FAULT


HOLD ON TIME (HRS)







WARNING





Snow Controller



1.5 ApprovalsTheIceStoproofandgutterde-icingsystemisULListed,CSACertified,andFMApprovedforuseinnonhazardousareas.GM-1XTandGM-2XTarealsoFMApprovedforuseinClassI,Division2hazardouslocations.

1.6 WarrantyThermalManagement'limitedstandardwarrantyappliestoallproducts.Youcanaccessthecompletewarrantyatwww.pentairthermal.com.Toqualifyforanextended10-yearwarranty,registeronlinewithin30daysofinstallationatwww.pentairthermal.com.

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2 Pre-Installation Checks

Raychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01

2.1 Check MaterialsIfphysicaldamageisfound,theentiredamagedsec-tionmustberemovedandanewsectionofheatingcablesplicedin,usingonlyapprovedRaychemsplicekits.Donotattempttorepairthedamagedheatingcablesection.Ifthedamagecannotbefound,thecompletecircuitshouldberemovedandreplacedwithnewIceStopheatingcable.

WARNING: Shock or Fire Hazard. Damaged heating cable or connection kits can cause electrical shock, arcing, and fire. Do no attempt to energize damaged heating cable or connection kits. Replace them immediately using a new length of heating cable and the appropriate IceStop accessories.

Catalog number: GM — 1 or 2 XT X

Product family

Voltage 1 = 120 V 2 = 208-277 V

Jacket type: Fluoropolymer

Polyolefin

or

or

Figure 2: Catalog number

8



2.2 Connection Kits and Accessories

TABlE 1: CONNECTION KITS

Catalog number DescriptionHeating cable allowance1

Power connection

RayClic-PC

Quickconnectpowercon-nectionkittopower1runofheatingcable.Includes1endseal.Standard pkg:1

2ft(0.6m)

RayClic-PS

Quickconnectpowercon-nectionkittopower2runsofheatingcable.Includes2endseals.Standard pkg:1

2ft(0.6m)

RayClic-PT

Quickconnectpowercon-nectionkittopower3runsofheatingcable.Includes3endseals.Standard pkg:1

3ft(1m)

RayClic-LE

AlternatelightedendsealStandard pkg:1

2ft(0.6m)

R

RayClic-X

Crossconnectiontocon-nectfourheatingcablesStandard pkg:1

8ft(2.4m)

End seal

RayClic-E

ExtraendsealStandard pkg:1

0.3ft(0.1m)

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TABlE 1: CONNECTION KITS

Catalog number DescriptionHeating cable allowance1

Junction box

FTC-P

Junctionbox1mountedHSPpowerconnectionkits.Includes1endseal.Standard pkg:1

2ft(0.6m)

Splice connection

RayClic-S

QuickconnectsplicekitStandard pkg:1

2ft(0.6m)

FTC-HST

Heat-shrinkablesplicekitStandard pkg:2

2ft(0.6m)

Tee connection

RayClic-T

QuickconnectteekitStandard pkg:1

2ft(0.6m)

FTC-HST2

Heat-shrinkableteekitStandard pkg:2

2ft(0.6m)

1 Junctionboxnotincluded.2 OneRayClic-EendsealisrequiredforeachFTC-HSTusedas

ateekit.

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TABlE 2: ATTACHMENT ACCESSORIES

Catalog number Description No. of packages required

Mounting bracket

RayClic-SB-02

RayClicwallmountingbracketStandard pkg:1

1mountingbracket/RayClicconnectionkit(exceptRayClic-E)installedonawall

GMK-RC

Mechanical(penetrating)roofclipStandard pkg:50

1boxper35'ofroofedgewhenzig-zaglayoutisused

GM-RAKE

HangerbracketStandard pkg: 1

1hangerpercableindownspoutorasrequiredformechanicalprotection

CT-CABLE-TIE UV-resistantcabletieStandard pkg: 100

Variesdependingoninstallation

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Adhesives for Metal RoofsWiththeadhesivesthatareavailabletoday,theattachmentofclipstometalroofscanbeasreliableasscrewsornailsintoawoodenroof.Theadhesivesthatperformthebestallowsomeflexibilityintheconnectionbetweentheclipandtheroofsurface.Adhesivessuchasepoxies,whichcuretoahardnonflexibleform,shouldnotbeused.Acid-curingsilicones,whicharenotasstrongandcoulddamagetheroof,alsoshouldnotbeused.

TheadhesiveslistedbelowhavebeenevaluatedbyThermalManagement.

TABlE 3: ADHESIvES FOR METAl ROOFS

Adhesive Description TimesDispensing equipment

MomentivePerformanceMaterials,Inc.RTV167

Neutral-curesiliconeadhesive

Tooling20minCure48hr

Caulkinggun

SpeedBonderH4800

Methacrylateadhesive

Tooling45–55minCure24hr

Two-partmixingdispenser

PlexusMA300 Methacrylateadhesive



PlexusMA310 Methacrylateadhesive



Important: Adhesive is not supplied by Thermal Management. Contact the manufacturers listed for information on local distributors. Follow manufac-turer’s instructions for surface preparation and instal-lation.

12



Toolingtimeisthetimebetweenwhentheadhesiveismixedandbecomesunusableforinstallingmoreclips.Curetimeisthetimeneededtowaitbeforetheheatingcablecanbeinstalled.

Momentive Performance Materials, Inc. RTv 167 Silicone Adhesiveisaneutral-curesiliconeadhesive.Contact:(800)332-3390.

SpeedBonder H3300 and H4800aregeneralpurpose,two-component,room-temperaturecuring,1:1mixratio,methacrylateadhesivesystems.Contact:(800)767-8786.

Plexus MA310 and MA300aretwopartmethacry-lateadhesivesdesignedforstructuralbondingofthermoplastic,metal,andcompositeassemblies.Contact:(800)851-6692.

Pleaseconsultwitharoofingcontractorbeforepur-chasingandinstallingclipswiththeadhesives.Itisextremelyimportanttofollowtheadhesivemanufac-turer’sinstructionscarefully,especiallywithregardtosurfacepreparation.

2.3 Review the DesignHoldaprojectcoordinationmeeting.Reviewthedesignatthismeetingandensurethatthecablessuppliedmeetthedesignrequirements.

Planthelocationofalljunctionboxesandsupplypoints.ReviewtheinstallationstepsinSection3fortheparticularapplicationasseveraltradesmaybeinvolvedinthesysteminstallation.ReviewSection4onattachmentmethods.Duringthemeeting,dis-cusstheroleofeachtradeandthecontractor.

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3 Heating Cable Installation


3.1 Heating Cable Handling

Paying Out the CableMountthereelonaholderandplaceitneareitherendofthepiperuntobetraced.Useareelholderthatpaysoutsmoothlywithlittletension.Avoidjerk-ingthecablewhilepulling.

Whenpayingouttheheatingcable,AVOID:• Sharpedges• Excessivepullingforceorjerking• Kinkingorcrushing• Walkingonorrunningovertheheatingcablewith

equipment

Connection Kits and Accessories InstallationStartbyinstallingconnectionkitsandaccessoriesinlocationsindicatedonprojectdrawingsorasindi-catedin“HeatingCableLayout”beginningonthefollowingpage.

Onceallclipsanddownspouthangersareinplace,andadhesivescuredifapplicable,theheatingcablecanbeinstalled.

Startattheendsealandworkback.Besuretoleaveadriploopatconnectionkitssothatwaterwillnottrackdowntheheatingcableintothecom-ponent.Installheatingcableusingthelayoutshownin"HeatingCableLayout"onpage 15foryourapplication.• Besuretheheatingcableprovidesacontinuous

pathforwatertoflowofftheroof.• Besuretoleavedriploopswhereappropriate.• Donotexceedmaximumcircuitlengthdeter-

minedduringdesignprocessusingtheRoofandGutterDe-Icing:IceStopSystemDesignGuide(H56070).

• Besuretoloopandsecureheatingcableatthebottomofdownspoutssothattheheatingcableisnotexposedtomechanicaldamage.

• InstallaUV-resistantcabletiewherevertwoheat-ingcablesareintendedtostaytogether.

14



• Testinstalledheatingcableforinsulationresistanceandcontinuity(see"Procedure"onpage 54).

3.2 Protecting the Heating CableOnmanyprojects,thereisadelaybetweeninstalla-tionoftheheatingcablesandinstallationofheatingsystemconnectionkits.Ifthereisanydelayatall,takethefollowingprecautionstoprotecttheheatingcables.• Keepcoversonjunctionboxestopreventmois-

turefromenteringthem.• Mechanicallyprotecttheheatingcablessothat

theycannotbedamagedbybeingwalkedon,runover,painted,sandblasted,burned,welded,orcut.

3.3 visual InspectionAvisualinspectionoftheIceStopsystemshouldbemadeafterinstallationiscomplete.Thisinspectionwillensure:• Properinstallationofthesystem• Nomechanicaldamage(cuts,burns,scrapes,

etc.)tocablesustainedpriortopour• Properheatingcablespacinganddepth• Properheatingcablefastening• Propertreatmentandlocationofexpansionand

controlsjoints

FurthervisualinspectionoftheIceStopsystemisrecommendedfollowinganyfurtherworkper-formedonbuildingthatmaycausedamagetothesystem.Furtherworkmayinclude,butisnotlim-itedto,roofing,gutterordownspoutmaintenanceorrepair,manualsnowremoval,installationofmechanical,electricalorcommunicationsequip-mentsuchasantennas,receivers,oraircondition-ingunits.Also,ifroofsustainsdamageofanykind,visualandfunctionalinspectionofIceStopsystemisrecommended.

15



3.4 Heating Cable layoutHeatingcablelayoutdependsprimarilyontherooftypeandrooffeatures.Thefollowingsectionsshowtypicallayoutsonstandardrooftypes:• "SlopedRoof–Standard"onpage 16• "SlopedRoof–StandingSeam"onpage 17• "FlatRoof"onpage 20• "SlopedRoofwithoutGutters"onpage 21• "RoofValleys"onpage 23• "Roof/WallIntersections"onpage 24• "Gutters"onpage 25• "Downspouts"onpage 27

Important: For optimum performance, the heating cable should be in contact with snow or ice. Installing the heating cable under the roofing or the roofing materials will reduce the efficiency of the heating system. Please contact Thermal Management for assistance.

Figure3andFigure4followingillustrateseveralimportantterms:

Tracingwidth

Tracingheight

ClipsDownspouthanger

Figure 3: Front view of roof with IceStop system

16



12" (30 cm)

Area where ice dams are most likely to form

Eave overhang

Exterior wall

Heating cable

Gutter

Roof

Heated area

Figure 4: Side view of roof with IceStop system

Sloped Roof – StandardForslopedroofs,icedamsmayformattheroofedge.Tomaintainacontinuouspathformeltwaterrunoff,routetheheatingcableinazig-zagpat-ternasshowninFigure5andfollowtheappropri-ateattachmentrecommendationsin“AttachmentMethods‚”page 29.Additionalheatingcablemaybeneededforothergutters,downspouts,andvalleys.

2' (60 cm)

Figure 5: layout in a zig-zag pattern

• Runheatingcableuptheroofuntilitis12inches(30cm)pasttheexteriorwallintotheheatedarea(seeFigure4).

• Installtheheatingcableontheroofinazig-zagpatternasshowninFigure5.

• Besurethattheheatingcableextendsallthewaydowntomeetwiththerunofheatingcableinthe

17



gutter.Thiswillensurethatyouhaveacontinuouspathwherethemeltedwatercanflow.AttachtheheatingcablestogetherwithUV-resistantcableties.

• Table4wasusedinthedesignprocessofyourprojecttodeterminetheamountofheatingcablerequiredforastandardslopedroof.

TABlE 4: ICESTOP HEATING CABlE lENGTH FOR SlOPED ROOF – STANDARD

Eave overhang distance

Tracing width

Tracing height

Feet of heating cable per foot of roof edge

Meters of heating cable per meter of roof edge

0 2'(60cm) 12"(30cm) 2.5ft 2.5m

12"(30cm) 2'(60cm) 24"(60cm) 3.1ft 3.1m

24"(60cm) 2'(60cm) 36"(90cm) 4.2ft 4.2m

36"(90cm) 2'(60cm) 48"(120cm) 5.2ft 5.2m

Important: Attachment methods are not shown in Figure 5. For attachment methods, proceed to “Attachment Methods,” page 29.

other considerations

• Useasnowfenceorsnowguards(notshown)topreventsnowfromsliding.Extendheatingcableabovethesnowfenceatleast6inches(15cm).

• Iftherearenogutters,referto"HeatedDripEdges"onpage 37,forinformationonhowtoinstallheatingcableforthisapplication.

• Itisnotalwaysnecessarytorunheatingcablesontheroof.Ifyoudonotexperienceicedamsontheroof,installingheatingcablesonlyintheguttersanddownspoutsmaybesufficient.

Sloped Roof – Standing SeamForslopedstanding-seammetalroofs,icedamsmayformattheroofedge.Tomaintainacontinu-ouspathformeltwatertorunoff,routetheheat-ingcablealongtheseamsasshowninFigure6

18



andfollowtheattachmentrecommendationsin“AttachmentMethods‚”page 29.Additionalheat-ingcablemaybeneededforgutters,downspouts,andvalleysandiscoveredinSection3.

Figure 6: layout on a standing seam room

• Runtheheatingcableuptheseamuntilitis12"(30cm)pasttheexteriorwallandintoaheatedarea,Figure4onpage 16.

• Runtheheatingcableuponesideoftheseam,loopitovertotheotherside,andreturnittothebottomofthegutter.Continuealongthebottomoftheguttertothethirdseamandrepeattheprocess(Figure5).Iftheseamsaremorethan24"(60 cm)apart,traceeveryseam.

19



TABlE 5: ICESTOP HEATING CABlE lENGTH FOR SlOPED ROOF – STANDING SEAM

Eave overhang distance

Standing seam spacing

Tracing height

Feet of heating cable per foot of roof edge

Meters of heating cable per meter of roof edge

12"(30cm) 18"(45cm) 24"(60cm) 2.8ft 2.8m

24"(60cm) 18"(45cm) 36"(90cm) 3.6ft 3.6m

36"(90cm) 18"(45cm) 48"(120cm) 4.3ft 4.3m

12"(30cm) 24"(60cm) 24" (60cm) 2.4ft 2.4m

24"(60cm) 24"(60cm) 36"(90cm) 2.9ft 2.9m

36"(90cm) 24"(60cm) 48"(120cm) 3.6ft 3.6m

• Onstandardsystems,thelengthofheatingcableneededfortheroofandguttercanbedeterminedbytheformula:Heatingcablelength=[2xno.ofseamstracedx(traceheight+distancefromroofedgetogutterbot-tom)]+distancealongthegutter/roofedge

Additionalheatingcablewillbeneededforconnec-tionkitsanddownspouts.

Important: Attachment methods are not shown in Figure 5. For attachment methods, proceed to “Attachment Methods,” page 29.


• Useasnowfenceorsnowguards(notshown)topreventsnowfromsliding.Extendheatingcableabovethesnowfenceatleast6inches(15cm).

• Iftheroofingmaterialscontinuedownthefascia,contactyourlocalThermalManagementrepre-sentativeorThermalManagementdirectlyfordesignassistance.

• Iftherearenogutters,referto"HeatedDripEdges"onpage 37,forinformationonhowtoinstallheatingcableforthisapplication.

• Itisnotalwaysnecessarytorunheatingcablesontheroof.Ifyoudonotexperienceicedamsontherooforroofdamage,installingheatingcablesonlyintheguttersanddownspoutsmaybesufficient.

20



Flat RoofIcedamsmayoccuronflatroofsattheedgeflashingandatdrains.Flatroofsaretypicallypitchedtowarddrainsandthesepathsoftenbecomeobstructedbysnowandice.Tomaintainacontinuouspathformeltwatertorunoff,routetheheatingcableasshowninFigure7andfollowtheappropriateattach-mentrecommendationsin“AttachmentMethods‚”page 29.Additionalheatingcablemaybeneededfordownspouts.

Junctionbox

DrainSlope

Ice can form around drain and at roof edges where adjacent snow thaws during the day and refreezes at night.

Heating cable provides a continuous heated path to allow melt water to run off the roof before it refreezes.

Heating cable should be positioned around the perimeter and in the valleys of a flat roof. The heating cable must extend into the drain orscupper to allow the melt water to exit the roof.

Scupper

Drip loop

Figure 7: layout on a flat roof

21



• Placeheatingcablearoundperimeter.• Tracevalleysfromperimetertodrain.• Extendheatingcableintointernaldownspoutsat

least12inches(30cm)intoheatedspace.• Externaldownspoutsandscuppersmustbe

treatedcarefully.Apathmustbeprovidedforthevalley/perimeterheatingcabletothepointofdis-charge(seeFigure15onpage 27).

• Toavoiddamage,donotwalkontheheatingcable.

Sloped Roof without GuttersWhenguttersarenotusedonabuilding,icedamsmayformattheroofedge.Tomaintainacontinuouspathformeltwatertorunoff,adriplooporheateddripedgemaybeused.Driploopsanddripedgesallowwatertodripfreeoftheroofedge.

RoutetheheatingcableasshowninFigure8orFigure9belowandfollowtheappropriateattach-mentrecommendationsin“AttachmentMethods‚”page 29.Additionalheatingcablemaybeneededforvalleys.

2"–3"(5–8 cm)

Figure 8: layout for heated drip loops

22



IceStopheatingcable

Figure 9: layout for heated drip edge

Important: Attachment methods are not shown in the above illustrations. For attachment methods, pro-ceed to “Attachment Methods,” page 29.


• Useasnowfenceorsnowguardstopreventsnowfromsliding(notshown).Extendheatingcableabovethesnowfenceaminimumof6inches(15 cm).

• Icewillbuilduponthesurfacesbelowthedriploopordripedgeifguttersarenotused.

• Icemayalsobuildupontheverticalsurfacesifthereisn’tasufficientoverhangorifthereisastrongwind.Useofaguttersystemwillpreventthisicebuildup.

23



Roof valleysIcedamsmayformatthevalleyonaroofwheretwodifferentslopesmeet.Tomaintainacontinuouspathformeltwater,runtheheatingcableupanddownthevalleyasshowninFigure10andfollowtheappropriateattachmentrecommendationsin“AttachmentMethods‚”page 29.Additionalheat-ingcablemaybeneededfortheroofsurface,gut-ters,anddownspouts.

2/3

1/3

Figure 10: layout for a roof valley

• Tracetwo-thirdsofthewayupeachvalleywithadoublerunofheatingcable(loopupandbackonce).

• Theheatingcablemustextendintothegutter.Ifyoudon’thavegutters,theheatingcableshouldextendovertheedge2to3inches(5to8cm)toformadriploop.

• Forattachmentmethods,proceedto“AttachmentMethods‚”page 29.

24



Roof/Wall IntersectionsRoof/wallintersectionscanbetreatedinthesamemannerasvalleys.Snowhasatendencytocollectatthisinterface.Providingaloopofheatingcabletwo-thirdsofthewayuptheslopewillprovideapathfortheextrameltwaterinthisareatoescape.

2"–3"

4"–6"

1/3

2/3

Figure 11: layout for a roof/wall intersection

• Extendaloopofheatingcabletwo-thirdsofthewayuptheslopeadjacenttothewall.

• Positiontheclosestheatingcableapproximately2to3inches(5to8cm)fromthewall.Positionthesecondheatingcable4to6inches(10to16cm)fromthefirst.

25



GuttersIcemayaccumulateinguttersandattheroofedge.Tomaintainacontinuouspathformeltwatertorunoff,routetheheatingcableasshowninFigure12below.Additionalheatingcablemaybeneededfortheroofsurface,downspouts,andvalleys.

Figure 12: layout in standard gutters−up to 6" (16 cm) wide

• Useonerunofheatingcableinthegutter.• Noattachmenttogutterisnormallyrequired.If

attachmentisdesired,usearoofclipsuchasaRaychemGMK-RCclip.

• Continueheatingcabledowntheinsideofthedownspout.See"Downspouts"onpage 27,formoreinformation.

26



Inwidegutters,snowandicecanbridgeoverthetunnelcreatedbyasingleheatingcableandpreventmeltwaterfromgettingintothegutteranddown-spouts.Tomaintainacontinuouspathformeltwatertorunoff,runtheheatingcableinthegutterasshowninFigure13belowandfollowtheappropri-ateattachmentrecommendationsin“AttachmentMethods‚”page 29.Additionalheatingcablemaybeneededfortheroofsurface,downspouts,andvalleys.

6" (15 cm) spacingmaximum

GM-RAKE

GMK-RC

Figure 13: layout in wide gutters−6" to 12" wide

27



DownspoutsIcemayformindownspoutsandpreventmeltwaterfromescapingfromtheroof.Tomaintainacontinu-ouspathformeltwatertorunoff,runtheheatingcableinsidethedownspouttotheendasshowninFigure14andFigure15below.Followtheappropri-ateattachmentrecommendationsin“AttachmentMethods‚”page 29.Additionalheatingcablemaybeneededfortheroofsurface,gutters,andvalleys.

Figure 14: Heating cable at top of downspout

Drain removes melt waterbelow the frost line.

Accumulated icemay block drains.

Accumulated icecan be removed.

12"

Figure 15: Heating cable at bottom of downspout

• Ifthedownspoutendsunderground,theheatingcableshouldextendintoaheatedareaorbelowthefrostline.

• Forlow-water-flowsituations,teeingtheheatingcablesothatasinglerungoesdownthedown-spoutisusuallysufficient.Forhigh-water-flowsituations,whereambienttemperaturesoftenfallbelow–10°F(–23°C),orwhereitisn’tconvenient

28



toteetheheatingcable,usetworuns—byrunningtheheatingcabledowntothebottomandthenbacktothetop.

• Leavedriploopsbelowthedownspoutatbottom.• Ifasinglerunofheatingcableisused,theend

sealshouldbeloopedbackupatleast12inches(30cm)insidethedownspout.

• Ifthedownspoutendsneartheground,waterwillrefreezeonthegroundandbuilduparoundthedownspout,eventuallyblockingtheopening.


Topreventmechanicaldamage,donotleavetheendsealexposedattheendofthedownspout.

29

4 Attachment Methods


4.1 OverviewHeatingcableattachmentdependsprimarilyupontherooftype.Thefollowingtableshowstherecom-mendedattachmentmethodsfortypicalroofmateri-alsandroofareas.

TABlE 6: ATTACHMENT METHODS FOR TyPICAl ROOFS

Roof materialRecommended attachment method

Alternate attachment method

Shake/shingle "MechanicalAttachment"onpage 30

Rubber/membrane

"BeltLoopApproach"onpage 33

"AdhesiveAttachment"onpage 31

Metal "AdhesiveAttachment"onpage 31

"MechanicalAttachment"onpage 30"BeltLoopApproach"onpage 33

Wood "MechanicalAttachment"onpage 30

Other ContactThermalManagementforassistance

Area Attachmentmethod

Gutters Recommendusinghangerclipsgluedtogutterifpossibleforsecurity(seepage 35)

Downspouts Downspouthangers(page 36)

Dripedges Attachedtoaflatsheetorstandarddripedge,orinstalledinformedsheetmetal(seepage 37)

Componentlocations

Driploops(page 37)

Roofedgeswithnogutter

Driploops(page 37)

30



4.2 Roof Attachment Methods

Mechanical AttachmentOneofthemostcommonattachmentmethodsistouseaRaychemGMK-RCroofclip.Itcanbeusedonallsurfacesthatcanbenailedorscrewedinto.

Figure 16: GMK-RC mechanical attachment

• TheGMK-RCroofclipsareusedtosecureIceStopheatingcable.Thismultipurposebracketattacheswithascrew,nail,oradhesivetomanytypesofroofsandgutters.

• Afterdeterminingtheheatingcablelayout,fastentheclipstotheroofbeforeinstallingtheheat-ingcableinthebracket.Ifusingnailsorscrews,applysufficientwater-sealingmaterialaroundtheclipsandnailsorscrewstopreventroofleaks.

• Threadtheheatingcableintotheclips.Useaddi-tionalclipswherevertheheatingcablemaybesubjecttoabrasionfrommovement.

• Useplierstoclosetheclamps,butbecarefulnottocrushtheheatingcable.

• Oneboxof50GMK-RCclipsissufficienttoattachtheheatingcableon35feet(11m)ofroofedgeusingaserpentinelayout.Yourlayoutmayrequireadditionalclips.

• Forlayoutsotherthanthestandardserpentine,useoneclipforeach5to10feet(1.5to3m)of

31



unsupportedheatingcableandateverychangeofheatingcabledirection.

• Forstandardslopedroofs,theloopsofheatingcablebeingserpentinedontheroofshouldbeattachedusingaUV-resistantcabletie,totheheatingcableruninthegutter.

• Forstandingseamroofs,theheatingcableshouldbecable-tiedtogetheratthebottomoftheseam.

Adhesive AttachmentForroofswherepenetratingattachmentsarenotdesired,usetheGMK-RCclipattachedbyadhesive.

Figure 17: GMK-RC adhesive attachment

Figure 18: GMK-RC clip on flat roof

32



• TheGMK-RCroofclipsareusedtosecureIceStopheatingcable.Theclipattacheswithadhesive(notsuppliedbyThermalManagement)tomanytypesofroofsandgutters.

• SeveraladhesivesarerecommendedbyThermalManagement.SeeTable3onpage 11ofthismanualorcontactThermalManagementforalternatives.

• Onastandingseamroof,usefourclipsoneachseambeingtraced.Onaflatsurface,useoneclipforevery5to10feet(1.5to3m)ofunsupportedheatingcableandateverychangeofdirection.

• Followallrecommendationsfromtheadhesivemanufacturerwithregardtocleaningandprepar-ingtheroofsurfacefortheadhesive.

• Afterdeterminingtheheatingcablelayout,fastentheclipstotheroofwiththeadhesiveandallowtheadhesivetocurebeforeinstallingtheheatingcable.

• Threadtheheatingcablethroughtheclips.Useadditionalclipswherevertheheatingcablemaybesubjecttoabrasionfrommovement.

Important: How well the adhesive holds can be strongly affected by how well the surface to which it will adhere is prepared and by what type of adhesive is used. Be sure to follow the recommendations of the adhesive manufacturer.

33



Belt loop ApproachWiththebeltloopapproach,stripsofroofingmateri-alsarefastenedtotheroofusingstandardmeansforthatparticulartypeofroof.TheheatingcableisattachedwithaUV-resistantcabletietotheloopformedbythismaterial.

Strip of roofmaterial

Roofadhesive

Cable tie

Heatingcable

Figure 19: Belt loop approach on a sloped roof

Figure 20: Belt loop approach on a flat roof

• ThebeltloopmethodofsecuringtheIceStopheatingcableinvolvesusingasmallpieceofroof-ingmaterialtoforma“beltloop.”

• Useatleastonebeltloopforevery5to10feet(1.5to3m)ofunsupportedheatingcableandateveryheatingcablechangeofdirection.

34



• Afterdeterminingtheheatingcablelayout,fasteneachendusingstandardmeansforthatparticulartypeofroof.Examplesofthiswouldbeattachingwithsolderonacopperroof,adhesiveonamem-braneroof,ortaronanasphaltroof.

• TheheatingcableisattachedwithaUV-resistantcabletietotheloopformedbythismaterial.

• Useadditionalclipswherevertheheatingcablemaybesubjecttoabrasionfrommovement.

Alternate Attachment MethodsThermalManagementattachmentclipsweredevel-opedasaneasywaytoprovideenoughsupportfortheheatingcablewithoutcrimping,crushing,orotherwisedamagingtheheatingcableandwithoutapplyinganychemicalsoradhesivesdirectlytotheheatingcable.Othermeansmaybeusedtoattachtheheatingcableaslongasthey:• Donotcrush,crimp,cut,orotherwisedamage

theheatingcable.Damagetotheheatingcablecouldcausethesystemtofail,resultinginelectricshockorfire.

• Donotapplyadhesivesorotherchemicalsdirectlytotheheatingcable.Manyadhesiveswillnotsticktotheouterjacket,whichcouldcausetheattach-mentmethodtofailandcouldresultininadequatedrainpaths.

• Provideenoughstrengthtosupporttheheatingcableontheroofandanyloadfromsnowthatcol-lectsonthesystem.Iftheattachmentmethodisnotstrongenough,theheatingcablecouldcomelooseandfalloff.

Onemethodsometimesusedistoattachtheheat-ingcablewithaUV-resistantcabletietoabracket,rod,orcablethatisinstalledtosupporttheheat-ingcable.Thebrackets,rods,orcablesarethenattachedtotheroofthroughwhatevermeansareappropriateforthesituationandcansupporttheweightoftheheatingcable.

35



4.3 Attachment Methods for Other Areas

GuttersTheIceStopheatingcableisnotnormallyattachedtothegutter.

6" (15 cm) spacingmaximum

GM-RAKE

GMK-RC

Figure 21: GMK-RC clip on a gutter

• Attachmentisnotgenerallyrequiredforstan-dardgutters.Ifattachmentisdesired,suchasinhigh-windareas,useGMK-RCadhesive-mountedattachmentclips.SeveraldifferentadhesivesarerecommendedbyThermalManagement.SeeTable3onpage 11.

• Forlargegutters(6to12incheswide[15cmto30 cm]),usetworunsofheatingcableseparatedbyGMK-RCroofclips.Itisnotnecessarytoattachtheclipstothegutter.UseonepairofGMK-RCroofclipsforevery10feet(3m).

36



DownspoutsTheIceStopheatingcableneedstobeattachedatthetopofeachdownspoutusingoneGM-RAKEdownspouthangerperheatingcable.TheGM-RAKEdownspouthangerclampsaroundtheheatingcableandattachestothefasciawithascrewornail.

Figure 22: GM-RAKE downspout hangers

• GM-RAKEdownspouthangersprotecttheheat-ingcablefromdamagefromsharpedgesandalsoprovidesupportfortheweightoftheheatingcable.

• UsetwoGM-RAKEdownspouthangersfordouble-traceddownspouts.

• AttachtheGM-RAKEdownspouthangerstothestructurewithanailorothersuitablemethod.

37



Heated Drip EdgesWheninstallingaheateddripedge,youcanattachtheheatingcabletotheroof’sdripedgeortoaflatsheetofsheetmetalwithaUV-resistantcabletie,orplacetheheatingcableinaformed(J-channel)pieceofsheetmetal.

Roofing material

Metal drip edgeIceStop heating cableUV-resistant cable tie

UV-resistant cable tie

Attached to flat sheet

Installed in a formed sheet

Attached to standard drip edge

2 3/4" (7 cm)

1/4" (0.6 cm)

3/4" (1.9 cm)

Figure 23: Heated drip edge attachment guidelines

• Theillustrationsaboveareguidelinesforheatingcableattachmentinaheateddripedgeapplication.ThermalManagementdoesnotmanufacturedripedgeattachmentclips.

• Use20-gaugeorthickercorrosion-resistantsheetmetal.

• ContactyourThermalManagementrepresenta-tiveorThermalManagementdirectlyforspecificrecommendations.

Drip loopsDriploopsareusedwhereconnectionkitsarelocat-edinthesystem,andatroofedgeswherenogutterisinstalled.Thedriploopsallowmeltwatertodripfreeoftheheatingcable.

38



rooF edGe With no GUtter

Wherenogutterisinstalled,adriploopshouldbeinstalledattheroofedgetoallowmeltwatertodripfreeoftheroof.Nospecialattachmentisnecessaryforheateddriploops.Usethesameattachmentasappropriateforyourrooftype;justmakesuretheheatingcableextends2to3inches(5to8cm)fromtheroofedge.connection Kits

Driploopsareusedwheretheheatingcableentersapowerconnection,tee,orsplice,tokeepwaterfromtrackingintothecomponent.Nospecialattachmentisnecessary.

Drip loop

Drip loop

Drip loop

Figure 24: Drip loops

39

5 Control, Monitoring and Power Distribution


5.1 Control SystemsThreecontrolmethodsarecommonlyusedwithroofde-icingsystems:• Manualcontrol• Ambientthermostat• Automaticmoisture/temperaturecontroller

Allthreemethodsrequirecontactorsifanysignificantlengthofheatingcableisbeingused.Thecontactormustbesizedtocarrytheload.Eachmethodoffersatrade-offofinitialcostversusenergyefficiencyandabilitytoprovideeffectivede-icing.Ifthesystemisnotenergizedwhenneeded,icewillform.Ifthesystemisenergizedwhende-icingisnotneeded,therewillbeunnecessarypowerconsumption.Choosethecontrolmethodthatbestmeetstheprojectperformancerequirements.ContactyourThermalManagementrepresentativefordetails.

ForClassI,Division2hazardouslocations,useanagency-approvedcontrollerorthermostatsuitableforthesameareause.

Manual ControlAmanuallycontrolledsystemisoperatedbyaswitchthatcontrolsthesystempowercontactor.Thismethodrequiresconstantsupervisiontoworkeffectively.

Thetypeofcontrolyouselectwillaffectpowerconsumptionandensuretheheatingcableisonwhenneeded.

Ambient ThermostatWhenanambientsensingthermostatisused,theroofandguttersystemwillbeenergizedwhentheambienttemperatureisbelowfreezing.Thiswillensuretheheatingcableisenergizedanytimethewatermightfreeze.

40



TABlE 7: CONTROl SySTEMS

Description

Electronic thermostats and accessories

ECW-GF

ECW-GF-DP

Electronicambientsensingcontrollerwith30-mAground-faultprotection.Thecontrol-lercanbeprogrammedtomaintaintempera-turesupto200°F(93°C)atvoltagesfrom100to277Vandcanswitchcurrentupto30Amperes.TheECW-GFiscompletewitha25-ft(7.6-m)temperaturesensorandishousedinaNEMA4Xratedenclosure.ThecontrollerfeaturesanAC/DCdryalarmcon-tactrelay.

Anoptionalground-faultdisplaypanel(ECW-GF-DP)canbeaddedtoprovideground-faultoralarmindicationinapplicationswherethecontrollerismountedininaccessiblelocations.

41




Snow melting controllers

APS-3C

AutomaticsnowmeltingcontrollerhousedinaNEMA3Renclosureprovideseffective,economicalautomaticcontrolofallsnowmeltingapplications.CSACertified,c-UL-usListed,availablein120Vand208-240V,50/60Hzmodels,24-AmpDPDToutputrelay,adjustablehold-ontimer.Enclosuredimensions:11-1/2inx9-1/8inx6-9/16in(292mmx232mmx167mm)

APS-4C

AutomaticsnowmeltingcontrollerhousedinaNEMA3Renclosureprovideseffective,economicalautomaticcontrolofallsnowmeltingapplications.TheAPS-4CoperatesuptotenSC-40Csatellitecontactorsforlargerloads.CSACertified,c-UL-usListed,availablein277Vsingle-phase,and208/240,277/480,and600Vthree-phasemodels,built-in3-pole50-Ampcontactor,integral30-mAground-faultcircuitinterrupter,adjustablehold-ontimer.Enclosuredimensions:11-1/2inx9-1/8inx6-9/16in(292mmx232mmx167mm)

SC-40C

Satellitecontactorpowercontrolperiph-eralforanAPS-4Csnowmeltingcontrol-ler,housedinaNEMA3Renclosure.CSACertified,c-UL-usListed,availablein277Vsingle-phase,and208/240,277/480,and600Vthree-phasemodels,built-in3-pole50-Ampcontactor,integral30-mAground-faultcircuitinterrupter.Enclosuredimensions:11-1/2inx9-1/8inx6in(292mmx232mmx152mm)

42




Snow melting and Gutter de-icing controllers

HEATER CYCLE

PD-Pro

Automaticgutterde-icingcontrollerinaNEMA4Xenclosurethatinterfaceswithuptotwosnowandicesensors(anycombinationofCIT-1,GIT-1,orSIT-6E),soldseparately.ThecontrollerhasanadjustableHold-Ontimerthatcontinuesheateroperationupto8hoursafterthesensorsstopdetectingsnoworicetoensuresnowandiceiscompletelymelted.TheHeaterCycletoggleswitchallowsformanualactivationorcancellationofheateroperation.Controllerisc-UL-usListedandisavailablefor120-277Vsingle-phasesupplywith24-Amprelay.Enclosuredimensions:51/2inx81/8inx43/8in(140mmx206mmx111mm)

GF-Pro

Automaticgutterde-icingcontrollerwithintegrated30-mAGround-FaultEquipmentProtection(GFEP)inaNEMA4Xenclosurethatinterfaceswithuptotwosnowandicesensors(anycombinationofCIT-1,GIT-1,orSIT-6E),soldseparately.ThecontrollerhasanadjustableHold-Ontimerthatcontinuesheateroperationupto8hoursafterthesensorsstopdetectingsnoworiceensuresnowandiceiscompletelymelted.TheHeaterCycletoggleswitchallowsformanualactivationorcancellationofheateroperation.Controllerisc-UL-usListedandisavailablefor120-277Vsingle-phasesupplywith24-Amprelay.Enclosuredimensions:51/2inx81/8inx43/8in(140mmx206mmx111mm)

Snow melting and gutter de-icing sensors and accessories

CIT-1

Overheadsnowsensorthatdetectsprecipitationorblowingsnowatambienttemperaturesbelow38°F(3.3°C).ForusewithaPD-Pro,GF-Pro,APS-3CorAPS-4Cautomaticsnowcontroller,oranSC-40Csatellitecontactor.

GIT-1

Guttersensorthatdetectsmoistureatambienttemperaturesbelow38°F(3.3°C).ForusewithaPD-Pro,GF-Pro,APS-3CorAPS-4Cautomaticsnowcontroller,oraSC-40Csatellitecontactor.

43




RCU-3

TheRCU-3providescontrolandstatusdis-playtotheAPS–3Ccontrollerfromaremotelocation.Ithasa2,4,6or8hourCYCLETIMEadjustment,independentofAPS-3Csetting.

RCU-4

TheRCU-4providescontrolandstatusdis-playtotheAPS-4CcontrollerandSC-40CSatelliteContactorfromaremotelocation.Ithasa2,4,6or8hourCYCLETIMEadjust-ment,independentoftheAPS-4CorSC-40Csetting.

Automatic Moisture/Temperature ControllerThemostconservativeapproachfromanenergy-consumptionpointofviewisanautomaticmoisture/temperaturecontroller.ThermalManagementsuppliesanautomaticmoisture/temperaturesensor,whichconsistsofanAPScontrolpanel,oneormoreGIT-1guttersensors,andoneormoreCIT-1aerialsnowsensors.TheRoofandGutterDe-Icing:IceStopSystemDesignGuide(H56070)outlinestheoptionsforthisapproach.

TheGIT-1icesensorshouldbemountedinguttersneardownspouts.Itsensestheactualenvironmentalconditions,suchastemperatureandmoisture.AGIT-1sensorisrecommendedforeachcriticalareathatneedstobemonitoredforicingconditions(suchaswhenonesideofabuildinggetssuninthemorningandtheothersidegetssunintheafternoon,oronesidegetstheprevailingwindsandtheothersideisprotected).ACIT-1aerial-mountedsnowsensorisalsorecommended.Havingbothgutterandsnowsensorsallowsforsnowtobeginmeltingintheguttersattheonsetofanysnoworicecondition.

44



5.2 Power DistributionOncetheheatingcablecircuitsandcontrolhavebeendefined,youmustselecthowtoprovidepowertothem.PowertotheIceStopheatingcablescanbeprovidedinseveralways:directlythroughthecontroller,throughexternalcontactors,orthroughSMPGorHTPGpowerdistributionpanels.

WARNING: To minimize the danger of fire from sustained electrical arcing if the heating cable is damaged or improperly installed, and to comply with the requirements of Thermal Management, agency certifications, and national electrical codes, ground-fault eq-uipment protection must be used on each heating cable branch circuit. Arcing may not be stopped by conventional circuit protection.

Single Circuit ControlHeatingcablecircuitsthatdonotexceedthecurrentratingoftheselectedcontroldeviceshowninTable8canbeswitcheddirectly.

Group ControlIfthecurrentdrawexceedstheswitchrating,orifthecontrollerwillactivatemorethanonecircuit(groupcontrol),anexternalcontactormustbeused.

45



Typical Wiring Schematics

Single circuit control

Group control

Temperaturecontroller

1-poleGFEP breaker

1N

Heatingcable

øø supply

C

Temperaturecontroller

Contactor

1-poleGFEP breaker 1 ø supply

ø

N

N

ø2

ø1

ø3

3-phase4-wiresupply

Figure 25: Typical controller wiring—multiple circuits

46



N

Three-polemain contactor

Fuse

Main circuit breaker (optional)

Incomingpower

GND

24 V

One-pole with 30 mAground-fault trip (277 V)

Remote annunciation alarm(circuit breakerwith alarm type #3)

GIT-1

CIT-1

SIT-6E

Braid

Aerialsnow sensor

Gutterice sensor

Slabtemperaturesensor

Pavement-mountedsensor

Single Øconnection

SNOW/ICE

SUPPLY

EUR-5A SNOW SWITCHAUTOMATIC SNOW/ICE MELTING CONTROL PANEL

HEATER

HEATERCYCLE

HOURS

0

45°F

50°F

55°F

60°F65°F

70°F

75°F

80°F

85°F

2

4 6

8

10

TEMPERATURE

Control transformer

Figure 26: Typical wiring diagram of group control with SMPG1

Control and Feed WiringThecontrolsandfeedwiringmustbeinplacepriortosystemstartup.• Usea30mAtriplevelground-faultequipment

protectiondeviceforeachcircuit.• Powerthesystemwiththeappropriatevoltage.• Addconduitdrainsatpowerconnectionsowater

doesnotaccumulateinjunctionboxes.• Besurethecontactorbeingusedisappropriate

fortheload.Ifthecontrollerisbeinguseddirectly,besurethatitisratedfortheloadandthatallrequirementsfordisconnectsarefollowed.

• Testcontrolforproperoperation(see"Tests"onpage 52).

47



TABlE 8: MAxIMUM CIRCUIT lENGTH IN FEET (METERS)

15 A and 20 A

Heating cable

Start-up temperature

Circuit breaker size Max. A/ft

Max. A/m15 A 20 A

GM-1X&GM-1XTat120V

32°F (0°C) 100 (30) 135 (41) 0.120 0.394

20°F (–7°C) 95 (29) 125 (38) 0.126 0.414

0°F (–18°C) 80 (24) 100 (30) 0.150 0.492

GM-2X&GM-2XTat208V

32°F (0°C) 190 (58) 250 (76) 0.063 0.207

20°F (–7°C) 180 (55) 235 (72) 0.067 0.220

0°F (–18°C) 145 (44) 195 (59) 0.083 0.272

GM-2X&GM-2XTat240V

32°F (0°C) 200 (61) 265 (81) 0.060 0.197

20°F (–7°C) 190 (58) 250 (76) 0.063 0.207

0°F (–18°C) 155 (47) 205 (62) 0.077 0.253

GM-2X&GM-2XTat277V

32°F (0°C) 215 (66) 290 (88) 0.056 0.184

20°F (–7°C) 200 (61) 265 (81) 0.060 0.197

0°F (–18°C) 165 (50) 225 (69) 0.073 0.240

30 A and 40 A

Heating cable

Start-up temperature

Circuit breaker size Max. A/ft

Max. A/m30 A 40 A1

GM-1X&GM-1XTat120V

32°F (0°C) 200 (61) — 0.120 0.394

20°F (–7°C) 185 (56) 200 (61) 0.126 0.414

0°F (–18°C) 155 (47) 200 (61) 0.150 0.492

GM-2X&GM-2XTat208V

32°F (0°C) 380 (116) — 0.063 0.207

20°F (–7°C) 355 (108) 380 (116) 0.067 0.220

0°F (–18°C) 290 (88) 380 (116) 0.083 0.272

GM-2X&GM-2XTat240V

32°F (0°C) 400 (122) — 0.060 0.197

20°F (–7°C) 370 (113) 400 (122) 0.063 0.207

0°F (–18°C) 305 (93) 400 (122) 0.077 0.253

GM-2X&GM-2XTat277V

32°F (0°C) 415 (126) — 0.056 0.184

20°F (–7°C) 400 (122) 415 (126) 0.060 0.197

0°F (–18°C) 330 (101) 415 (126) 0.073 0.2401OnlyFTC-Ppowerconnection,FTC-HSTsplice/tee,andRayClic-Eendkitsmaybeusedwith40-ampcircuits.

48

6 Commissioning and Preventive Maintenance


6.1 System Start-up and OperationOncethesystemhasbeeninstalledandtested,itisreadytobepowered.Amanually-controlledsys-temwillhavetobeturnedonateachsnowstormandturnedoffwhentheroofisclearedofallsnow.Thermostatically-controlledsystemsanddual-sens-ingsystemswillturnonandoffautomatically.

Prior to System Start-Up• Performafinalvisualinspectionofallcircuits.• Performafinalinsulationresistancetestofall

circuits.• Instructowner/useronsystemoperationand

maintenance.• Besurethatowner/userhasallapplicableinstal-

lationinstructionsandoperationmanuals.

Indication of OperationSomepossibleindicatorsofaproperlyoperatingsystemarethefollowing:• Thecontrollermayindicatethecircuitispowered.• Visiblepathsmayshowthroughthesnowaround

theheatingcable.• Cablemayfeelwarmtothetouch.• Waterdrainagemaybevisibleatthegutteror

downspout.

6.2 Insulation Resistance (Megohmmeter) TestTheinsulationresistancetestiscriticaltoensurethesafetyandreliabilityoftheheatingcablesystem.Thistestshouldbeperformedaspartoftheinstal-lationofthesystem,andisusefulfortroubleshoot-inganinstalledsystem.

WARNING: Shock or Fire Hazard. Disconnect power to all circuits prior to testing.

49



WARNING: The heating cable can store a large electrical charge after the insulation resistance test is performed. To prevent personal injury from electrical shock, fully discharge the cable prior to disconnecting the megohmmeter. The megohmme-ter may discharge automatically. However, it may be necessary to short the cable leads. Contact your supervisor or the instrument manufacturer to verify the safest practice.

Usingamegohmmeter,testinsulationresistanceatthreevoltages—500,1000,and2500Vdc.Significantproblemsmaynotbedetectediftheinsulationresistanceistestedonlyat500or1000volts.First,measuretheresistancebetweentheheatingcablebuswiresandthegroundingbraid;then,iftheheat-ingcableisinstalledonametalgutter,downspout,and/ormetalroof,measuretheinsulationresistancebetweenthebraidandthemetalsurface.

Procedure1. Disconnectallpowertotheheatingcable,ther-

mostat,andcontactor.2. Settestvoltageat0Vdc.3. Connectthenegativelead(–)totheheating

cablemetallicbraid.4. Connectthepositivelead(+)tobothheating

cablebuswires.

2500 VdcMegohmmeter

Braid pigtail

Buswires

50



5. Turnonthemegohmmeterandsetthevoltageto500Vdc;applythevoltagefor1minute.Recordtheresistance.

6. Repeatstep5at1000Vdcand2500Vdc.7. Turnoffthemegohmmeter.8. Ifthemegohmmeterdoesnotself-discharge,

dischargephaseconnectiontogroundwithasuitablegroundingrod.Disconnectthemegohmmeter.

9. Iftheheatingcableisinstalledonametalroof,metalgutter,ormetaldownspout,repeatthesestepswiththenegativelead(–)connectedtothegroundingbraidandthepositivelead(+)connectedtothemetalroof,gutter,and/ordownspout.

10. Reconnectthethermostatorcontactorandre-energizethecircuit.

Insulation Resistance CriteriaAclean,dry,properlyinstalledcircuitshouldmea-surehundredsofmegohms,regardlessoftheheat-ingcablelengthormeasuringvoltage(0–2500Vdc).Thefollowingcriteriaareprovidedtoassistindeter-miningtheacceptabilityofaninstallationwhereoptimumconditionsmaynotapply:• Allthreeinsulationresistancevaluesshouldbe

greaterthan1000megohms.• Insulationresistancevaluesforanyparticular

circuitshouldnotvarymorethan25percentasafunctionofmeasuringvoltage.

• Readingmustbesteadyatmeasuringvoltage.• Ifanyoftheaboveconditionsarenotmet,consult

“Troubleshooting‚”Section8.

51



6.3 Continuity TestThecontinuitytestisusefulindeterminingiftheheatingcableisdamagedorwasnotconnectedcorrectly.Thistestcanbeperformedaspartofthetroubleshootingprocedure.

Important: Some of the heating cable connection kits, such as the end seal kit and power connection, splice, and tee kits, which utilize heat-shrink tubings, are not reenterable and must be replaced after this test is done.


1. Disconnectallpowertoheatingcable,thermo-stat,andcontactor.

2. Twistthetwobuswirestogetheratoneend.3. Takearesistancereadingfrombuswiretobus

wireattheotherend.Thereadingshouldbe3ohmsorless.Highreadings(above1000ohms)generallyindicatebuswiredamageorimprop-erlyinstalledconnectionkits.

4. Ifthereareanyteesonthecircuit,eachlegoftheteemustbetestedseparately.

5. Besuretountwistthebuswiresandinstallnewconnectionkitsonthecircuitpriortore-energiz-ingthecircuit.

6. Reconnectthecontactororthermostatandre-energizethecircuit.

52

7 Test Procedures


ThermalManagementrequiresaseriesofcommis-sioningtestsbeperformedontheIceStopsystem.Thesetestsarealsorecommendedatregularinter-valsforpreventivemaintenance.Resultsmustberecordedandmaintainedforthelifeofthesystem,utilizingthe“InstallationandInspectionRecord”(refertoSection9).Submitthismanualwithinitialcommissioningtestresultstotheowner.

7.1 TestsAbriefdescriptionofeachtestisfoundbelow.DetailedtestproceduresarefoundinSection7.

visual InspectionVisuallyinspectthepipe,insulation,andconnectionstotheheatingcableforphysicaldamage.Checkthatnomoistureispresent,electricalconnectionsaretightandgrounded,insulationisdryandsealed,andcontrolandmonitoringsystemsareoperationalandproperlyset.Damagedheatingcablemustbereplaced.

Insulation ResistanceInsulationResistance(IR)testingisusedtoverifytheintegrityoftheheatingcableinnerandouterjackets.IRtestingisanalogoustopressuretestingapipeanddetectsifaholeexistsinthejacket.

Ground-Fault TestTestallground-faultbreakerspermanufacturer’sinstructions.

7.2 Insulation Resistance Test – Test 1Insulationresistanceismeasuredbetweentheheatingcablesheathandthetails.ThermalManagementrecommendsthatinsulationresis-tancetesting(usingamegohmmeter)beconductedat2500Vdc.

53

7 Test Procedures


FrequencyInsulationresistancetestingisrecommendedatfourstagesduringtheinstallationprocessandaspartofregularlyscheduledmaintenance.• Whenreceived• Afterthecableshavebeeninstalled• Priortoinitialstart-up(commissioning)• Aspartoftheregularsysteminspection• Afteranymaintenanceorrepairwork*Underadverseweatherconditions,orwhenthetailsorterminalconnectionshaveevidenceofmoisture,lowerinsulationresistancesmaybeencountered.Wipetails,faceofpot,andalltermi-nalconnectionswithacleandryragtoeliminatemoistureandretest.

Test CriteriaTheminimuminsulationresistanceforaclean,dry,properlyinstalledcircuitshouldreflectthevaluesshownabove,regardlessoftheheatingcablelength.

7.3 Insulation Resistance (Megohmmeter) TestTheinsulationresistancetestiscriticaltoensurethesafetyandreliabilityoftheheatingcablesystem.Thistestshouldbeperformedaspartoftheinstalla-tionofthesystem,andisusefulfortroubleshootinganinstalledsystem.


Usingamegohmmeter,testinsulationresistanceatthreevoltages—500,1000,and2500Vdc.

Significantproblemsmaynotbedetectediftheinsu-lationresistanceistestedonlyat500or1000volts.First,measuretheresistancebetweentheheatingcablebuswiresandthegroundingbraid;then,iftheheatingcableisinstalledonametalgutter,down-spout,and/ormetalroof,measuretheinsulationresistancebetweenthebraidandthemetalsurface.

54

7 Test Procedures


Procedure1. Disconnectallpowertotheheatingcable,ther-

mostat,andcontactor.2. Settestvoltageat0Vdc.3. Connectthenegativelead(–)totheheating

cablemetallicbraid.4. Connectthepositivelead(+)tobothheating

cablebuswires.5. Turnonthemegohmmeterandsetthevoltageto

500Vdc;applythevoltagefor1minute.Recordtheresistance.

6. Repeatstep5at1000Vdcand2500Vdc.7. Turnoffthemegohmmeter.8. Ifthemegohmmeterdoesnotself-discharge,

dischargephaseconnectiontogroundwithasuitablegroundingrod.Disconnectthemegohmmeter.

9. Iftheheatingcableisinstalledonametalroof,metalgutter,ormetaldownspout,repeatthesestepswiththenegativelead(–)connectedtothegroundingbraidandthepositivelead(+)connectedtothemetalroof,gutter,and/ordownspout.

10. Reconnectthethermostatorcontactorandre-energizethecircuit.

Insulation Resistance CriteriaAclean,dry,properlyinstalledcircuitshouldmea-surethousandsofmegohms,regardlessoftheheat-ingcablelengthormeasuringvoltage(0–2500Vdc).Thefollowingcriteriaareprovidedtoassistindeter-miningtheacceptabilityofaninstallationwhereoptimumconditionsmaynotapply:• Allthreeinsulationresistancevaluesshouldbe

greaterthan100megohms.• Insulationresistancevaluesforanyparticular

circuitshouldnotvarymorethan25percentasafunctionofmeasuringvoltage.

• Readingmustbesteadyatmeasuringvoltage.• Ifanyoftheaboveconditionsarenotmet,consult

the“Troubleshooting”instructionsinSection8.

55

7 Test Procedures


Continuity TestThecontinuitytestisusefulindeterminingiftheheatingcableisdamagedorwasnotconnectedcorrectly.Thistestcanbeperformedaspartofthetroubleshootingprocedure.Note:Someoftheheat-ingcableconnectionkits,suchastheendsealkitandpowerconnection,splice,andteekits,whichutilizeheat-shrinktubings,arenotreusableandwillhavetobereplacedafterthistestisdone.


1. Disconnectallpowertoheatingcable,thermo-stat,andcontactor.

2. Twistthetwobuswirestogetheratoneend.3. Takearesistancereadingfrombuswiretobus

wireattheotherend.Thereadingshouldbe3ohmsorless.Highreadings(above1000ohms)generallyindicatebuswiredamageorimprop-erlyinstalledconnectionkits.

4. Ifthereareanyteesonthecircuit,eachlegoftheteemustbetestedseparately.

5. Besuretountwistthebuswiresandinstallnewconnectionkitsonthecircuitpriortore-energiz-ingthecircuit.

6. Reconnectthecontactororthermostatandre-energizethecircuit.

56

7 Test Procedures


7.4 Fault location TestsTherearethreemethodsusedforfindingafaultwithinasectionofheatingcable.1. Ratiomethod2. Conductancemethod3. Capacitancemethod

Ratio MethodTheratiomethodusesresistancemeasurementstakenateachendoftheheatingcabletoapproxi-matethelocationofabuswireshort.Ashortedheatingcablecouldresultinatrippedcircuitbreak-er.Iftheresistancecanbereadonastandardohmmeterthismethodcanalsobeusedtofindafaultfromabuswiretothegroundbraid.ThistypeofshortwouldtripaGFPDandshowafailedinsulationresistancereading.Measurethebus-to-busheatingcableresistanceateachend(measurementAandmeasurementB)ofthesuspectedsection.

A B

A B

A B

Braid

Figure 27: Cable resistance measurement test

Theapproximatelocationofthefault,expressedasapercentageoftheheatingcablelengthfromthefrontend,is:

Faultlocation:D= A x100 ________

(A+B)

Example: A= 1.2ohms B= 1.8ohms

Faultlocation:D= 1.2/(1.2+1.8)x100 = 40%

Tolocatealowresistancegroundfault,measurebetweenbusandbraid.

57

7 Test Procedures


A B

A B

A B

Braid

Figure 28: low resistance ground-fault test


Faultlocation:D= A x100 ________

(A+B)

Example: A= 1.2ohms B= 1.8ohms

Faultlocation:D= 1.2/(1.2+1.8)x100 = 40%

Thefaultislocated40%intothecircuitasmeasuredfromthefrontend.

Conductance MethodTheconductancemethodusesthecoreresistanceoftheheatingcabletoapproximatethelocationofafaultwhentheheatingcablehasbeenseveredandthebuswireshavenotbeenshortedtogether.Asev-eredcablemayresultinacoldsectionofpipeandmaynottripthecircuitbreaker.Measurethebus-to-busheatingcableresistanceateachend(measure-mentAandmeasurementB)ofthesuspectsection.Sinceself-regulatingcablesareaparallelresis-tance,theratiocalculationsmustbemadeusingtheconductanceofthecable.

A B

A B

A B

Braid

Figure 29: Cable resistance measurement

58

7 Test Procedures



Faultlocation:D= 1/A x100 ________

(1/A+1/B)

Example: A= 100ohms B= 25ohms

Faultlocation:D= (1/100)/(1/100+1/25)x100 = 20%

Thefaultislocated20%fromthefrontendofthecircuit.

59

7 Test Procedures


Capacitance MethodThismethodusescapacitancemeasurement(nF)toapproximatethelocationofafaultwheretheheatingcablehasbeenseveredoraconnectionkithasnotbeenconnected.

Recordthecapacitancereadingfromoneendoftheheatingcable.Thecapacitancereadingshouldbemeasuredbetweenbothbuswirestwistedtogether(positivelead)andthebraid(negativelead).Multiplythemeasuredcapacitancewiththeheatingcable’scapacitancefactoraslistedinthefollowingexample:

Example: Capacitancemeasurement=42.2nF

Capacitancefactor= 6.0ft/nFforallIceStopcables

Faultlocation = 42.2nFx6.0ft/nF=253ft(77m)

Theratioofonecapacitancevaluetakenfromoneend(A)dividedbythesumofbothAandB(A+B)andthenmultipliedby100yieldsthedistancefromthefirstend,expressedasapercentageofthetotalheatingcablecircuitlength.

Faultlocation:C= A x100 ________

(A+B)

60

8 Troubleshooting Guide

Raychem-IM-H58067-IceStopRoofGutterDeIcing-EN 18/01

Symptom Corrective Action

A.Circuitbreakertrips. Circuitbreakerundersized.

Circuitlengthtoolong.

Start-uptemperaturebelowdesigntemperature.

ResizethecircuitbreakersandfeedwiringperRoof and Gutter De-Icing: IceStop System Design Guide(H56070).

Defectivecircuitbreaker. Replacecircuitbreaker.

Connectionsorsplicesmaybeshortingout.Physicaldamagetotheheatingcable.

Toconfirmthatheatingcableisdamaged,testtheinsulationresistanceaccordingtotheproceduresdescribedin“TestMethods.”

Locateandrepairincorrectconnectionsorsplices.

Locatesandremovedamagedsectionsofheatingcable.

Tolocateshortingproblems,followthesesteps:1. Visuallyinspectthepowerconnection,splices,andend

sealsforproperinstallation.2. Checkforvisualindicationsofdamagetothecable,espe-

ciallyinanyareawheretheremayhavebeenmaintenancework.

3. Lookfordamageatentrancestodownspouts,aroundeaves,andattransitionsfromroofandgutter.

4. Ifatthispointyouhavenotlocatedtheproblem,youwillneedtobeginisolatingsectionsoftheheatingcabletofindthegeneralareaofdamage.(Forexample,cutthecircuitinhalfand,usingamegohmmeter,testbothhalvestofindthedamagedsection.)Thenremovethedamagedsectionofheatingcable.

Buswiresincontactwitheachother.

Cutofftheendseal.Re-cutthecableendandinstallanewendseal.

Excessivemoistureinconnec-tionboxesorsplices.

Dryoutandresealconnectionsandsplices.Testwithameg-ohmmeterperinstallationinstructions.

Nickorcutinheatingcableorpowerfeedwirewithmoisturepresent.

Locateandreplacedamagedpowerfeedwire.

Using5mAground-faultinterruptorinsteadof30mAground-faultprotectiondevice.

Replacecircuitbreakerwith30mAground-faultprotectiondevice.SeeGFEPDSelectionGuide(H55476)forinformationondifferentbreakers.

61




A.Circuitbreakertrips. Circuitbreakerundersized.

Circuitlengthtoolong.

Start-uptemperaturebelowdesigntemperature.

ResizethecircuitbreakersandfeedwiringperRoof and Gutter De-Icing: IceStop System Design Guide(H56070).

Defectivecircuitbreaker. Replacecircuitbreaker.


Toconfirmthatheatingcableisdamaged,testtheinsulationresistanceaccordingtotheproceduresdescribedin“TestMethods.”


Locatesandremovedamagedsectionsofheatingcable.






Buswiresincontactwitheachother.

Cutofftheendseal.Re-cutthecableendandinstallanewendseal.




Locateandreplacedamagedpowerfeedwire.

Using5mAground-faultinterruptorinsteadof30mAground-faultprotectiondevice.

Replacecircuitbreakerwith30mAground-faultprotectiondevice.SeeGFEPDSelectionGuide(H55476)forinformationondifferentbreakers.

62




B.Poweroutputiszeroorappearslow.

Lowornoinputvoltage. Checkvoltageandcorrect.

Circuitisshorterthandesignshowsbecausesplicesorteesarenotconnected,ortheheatingcablehasbeensevered.

Checklengthofcableinstalled.Checkallsplicesandtees.Checkatendsealsforcontinuityasindicatedin“TestMethods,”Section7.

Improperconnectioncausesahigh-resistanceconnection.

Checkandfixsplicesandtees.

Thecontrolthermostatiswiredincorrectly.

Checkandrewirecontroller.

C.Heatingcablefailsinsula-tionresistancetest.


Toconfirmthatheatingcableisdamagedorconnectionkitsareshorting,testtheinsulationresistanceaccordingtotheproceduredescribedin“TestMethods,”Section7.


Locateandremovedamagedsectionsofheatingcable.









Locateandreplacedamagedheatingcableorpowerfeedwire.

63




B.Poweroutputiszeroorappearslow.

Lowornoinputvoltage. Checkvoltageandcorrect.

Circuitisshorterthandesignshowsbecausesplicesorteesarenotconnected,ortheheatingcablehasbeensevered.

Checklengthofcableinstalled.Checkallsplicesandtees.Checkatendsealsforcontinuityasindicatedin“TestMethods,”Section7.

Improperconnectioncausesahigh-resistanceconnection.

Checkandfixsplicesandtees.

Thecontrolthermostatiswiredincorrectly.

Checkandrewirecontroller.

C.Heatingcablefailsinsula-tionresistancetest.


Toconfirmthatheatingcableisdamagedorconnectionkitsareshorting,testtheinsulationresistanceaccordingtotheproceduredescribedin“TestMethods,”Section7.


Locateandremovedamagedsectionsofheatingcable.










64




D.Heatingcablefailsinsula-tionresistancetest.


Toconfirmthatheatingcableisdamagedorconnectionkitsareshorting,testtheinsulationresistanceaccordingtotheproceduredescribedin“TestMethods,”Section7.Locateandrepairincorrectconnectionsorsplices.Locateandremovedamagedsectionsofheatingcable.Tolocateshortingproblems,followthesesteps:1. Visuallyinspectthepowerconnection,splices,andend









E.Snowisnotmeltingaroundtheheatingcable.

Circuitbreakeristripped.

Controllernotonornotworking.

Ambienttemperaturetoocold.

SeeSymptomA,“Circuitbreakertrips.”

Checkcontroller.

F.Downspoutsareblockedbyice.





Checkcontroller.

G.Thecircuitdoesnotdrawsufficientpowerofapprox-imately12W/ft(39.36W/m)at32°F(0°C)insnoworice(5W/ft(16.4W/m)at32°F(0°C)inair).



Allsectionsnotconnected.


Checkcontroller.

Repeatcontinuitytest,asdetailedin“ContinuityTest,”"InsulationResistance(Megohmmeter)Test"onpage 53.

65




D.Heatingcablefailsinsula-tionresistancetest.


Toconfirmthatheatingcableisdamagedorconnectionkitsareshorting,testtheinsulationresistanceaccordingtotheproceduredescribedin“TestMethods,”Section7.Locateandrepairincorrectconnectionsorsplices.Locateandremovedamagedsectionsofheatingcable.Tolocateshortingproblems,followthesesteps:1. Visuallyinspectthepowerconnection,splices,andend









E.Snowisnotmeltingaroundtheheatingcable.





Checkcontroller.

F.Downspoutsareblockedbyice.





Checkcontroller.

G.Thecircuitdoesnotdrawsufficientpowerofapprox-imately12W/ft(39.36W/m)at32°F(0°C)insnoworice(5W/ft(16.4W/m)at32°F(0°C)inair).



Allsectionsnotconnected.


Checkcontroller.

Repeatcontinuitytest,asdetailedin“ContinuityTest,”"InsulationResistance(Megohmmeter)Test"onpage 53.

66

9 Installation and Inspection Records


Roof and Gutter De-Icing System Installation Record

INSTAllATION lOCATION

Projectname: InstallationdateReferencedrawing: Rooflengthofinstallation ft❑m❑Company:Address CityState/Province: PostalcodeResidentialinstallationenvironment:❑Commercial❑Industrial❑HazardousAreaIfinstalledinahazardousarea,fillinthefollowingadditionalinformation:Area:Ignitiontemperature °F❑°C❑Groupclassification

INSTAllED By

Company:Address CityState/Province: PostalCodeName Phone

vISUAl INSPECTION(checkforallheatingcables)

Theheatingcabledoesnotlayunprotectedoversharpedges. Yes❑

Heatingcableattachmentpointsaresecure. Yes❑

67



Roof and Gutter De-Icing System Installation Record

INSTAllATION lOCATION

Projectname: InstallationdateReferencedrawing: Rooflengthofinstallation ft❑m❑Company:Address CityState/Province: PostalcodeResidentialinstallationenvironment:❑Commercial❑Industrial❑HazardousAreaIfinstalledinahazardousarea,fillinthefollowingadditionalinformation:Area:Ignitiontemperature °F❑°C❑Groupclassification

INSTAllED By

Company:Address CityState/Province: PostalCodeName Phone

vISUAl INSPECTION(checkforallheatingcables)

Theheatingcabledoesnotlayunprotectedoversharpedges. Yes❑

Heatingcableattachmentpointsaresecure. Yes❑

68



ElECTRICAl TESTINGNote:Insulationresistancevaluesshouldbegreaterthan1000megohms.Performinsulationresistancetestat500,1000,and2500Vdc(bypasscontrollerifapplicable)Megohmmetermanufacturer/model MegohmmeterdateoflastcalibrationMultimetermanufacturer/model Ohmsetting

1 Receipt of Material 2 After cable installation Insulation Insulation Heating cable resistance Continuity Heating cable resistance catalog no. /tag no. (MΩ) (Ω) catalog no. /tag no. (MΩ)Cable#1 Cable#1 Cable#2 Cable#2 Cable#3 Cable#3 Cable#4 Cable#4 Cable#5 Cable#5 Cable#6 Cable#6 Cable#7 Cable#7 Cable#8 Cable#8 Cable#9 Cable#9 Cable#10 Cable#10 Cable#11 Cable#11 Cable#12 Cable#12

3 Initial Start-up (Commissioning)

WARNING: Disconnect all power before performing insulation resistance and continuity tests.

Heating cable Insulation catalog no. /tag no. Heating cable location Breaker number resistance (MΩ) Supply voltage (v) Current (A)Cable#1 Cable#2 Cable#3 Cable#4 Cable#5 Cable#6 Cable#7 Cable#8 Cable#9 Cable#10 Cable#11 Cable#12 Ground-faultprotection(type) Ground-faulttripsetting mATestgroundfault Testcontroller

Contractor’ssignature: Witnessedby:Acceptedby: Date: Approvedby:

69



ElECTRICAl TESTINGNote:Insulationresistancevaluesshouldbegreaterthan1000megohms.Performinsulationresistancetestat500,1000,and2500Vdc(bypasscontrollerifapplicable)Megohmmetermanufacturer/model MegohmmeterdateoflastcalibrationMultimetermanufacturer/model Ohmsetting

1 Receipt of Material 2 After cable installation Insulation Insulation Heating cable resistance Continuity Heating cable resistance catalog no. /tag no. (MΩ) (Ω) catalog no. /tag no. (MΩ)Cable#1 Cable#1 Cable#2 Cable#2 Cable#3 Cable#3 Cable#4 Cable#4 Cable#5 Cable#5 Cable#6 Cable#6 Cable#7 Cable#7 Cable#8 Cable#8 Cable#9 Cable#9 Cable#10 Cable#10 Cable#11 Cable#11 Cable#12 Cable#12

3 Initial Start-up (Commissioning)


Heating cable Insulation catalog no. /tag no. Heating cable location Breaker number resistance (MΩ) Supply voltage (v) Current (A)Cable#1 Cable#2 Cable#3 Cable#4 Cable#5 Cable#6 Cable#7 Cable#8 Cable#9 Cable#10 Cable#11 Cable#12 Ground-faultprotection(type) Ground-faulttripsetting mATestgroundfault Testcontroller

Contractor’ssignature: Witnessedby:Acceptedby: Date: Approvedby:

70



Maintenance log RecordArealocation: System Referencedrawing(s)

CIRCUIT INFORMATION

Breakerpanelnumber: Supplyvoltage Phase

vISUAlHeating system connection kits Controller and sensor

Enclosures,junctionboxes,contactorssealed Signsofcorrosion/damage

Presenceofmoisture Delaytimerset

Signsofcorrosion

Damagetotermination

ElECTRICAl TESTINGPerforminsulationresistancetestat500,1000,and2500Vdc(bypasscontrollerifapplicable)


Heating Heating cable cable Breaker catalog no. /tag no. location number 500 vdc 1000 vdc 2500 vdcCable#1 Cable#2 Cable#3 Cable#4 Cable#5 Cable#6 Cable#7 Cable#8 Cable#9 Cable#10 Cable#11 Cable#12

Ground-faultprotection(type) Ground-faulttripsetting mATestgroundfault Testcontroller CommentsandactionsPreparedby: Company Date

Approvedby: Company Date

71



Maintenance log RecordArealocation: System Referencedrawing(s)

CIRCUIT INFORMATION

Breakerpanelnumber: Supplyvoltage Phase

vISUAlHeating system connection kits Controller and sensor

Enclosures,junctionboxes,contactorssealed Signsofcorrosion/damage

Presenceofmoisture Delaytimerset

Signsofcorrosion

Damagetotermination

ElECTRICAl TESTINGPerforminsulationresistancetestat500,1000,and2500Vdc(bypasscontrollerifapplicable)


Heating Heating cable cable Breaker catalog no. /tag no. location number 500 vdc 1000 vdc 2500 vdcCable#1 Cable#2 Cable#3 Cable#4 Cable#5 Cable#6 Cable#7 Cable#8 Cable#9 Cable#10 Cable#11 Cable#12

Ground-faultprotection(type) Ground-faulttripsetting mATestgroundfault Testcontroller CommentsandactionsPreparedby: Company Date

Approvedby: Company Date

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