WIXLIB

SECTION 11.41 Insulation Resistance Test1. Set the megohmmeter voltage to 0 Vdc.2. Connect the negative alligator clip to the metallic braid of the heating cable.3. Connect the positive alligator clip to the both heating cable bus wires.4. Turn on the megohmmeter and set the voltage to 500 Vdc.5. Apply voltage for one (1) minute.6. Check the resistance reading.7. Confirm that the resistance is greater than 20 megaohms.8. Record insulation resistance reading in table in Section 1.5.9. Repeat step 4-7 at 1000 Vdc.10. Confirm that the resistance value is within /- 10% of each other regardlessof the voltage applied.11. Record insulation resistance reading in table in Section 1.5.Insulation & continuity Test1.      4 Insulation & Continuity Testspre-INSTALLATIOn1.41.42 Continuity Test1. Set the multimeter to measure resistance.2. Twist the two bus wires together at one end of the cable.3. At the other end of the cable, connect the positive alligator clip to one of thebus wires and connect the negative alligator clip to the other bus wire.4. Confirm the resistance reading is less than 3 ohms. Resistance readings of1000 ohms or greater generally indicate damage to the bus wire or improperlyinstalled connection kits.1.43 Frequency of TestingInsulation resistance and continuity tests should be performed: Before installing the heating cable After installing connection kits (refer to connection kits instructions) Before installing the thermal insulation Before initial start-up (commissioning)Testing should also be included as part of regular system inspections, as well as afterany maintenance or repair work.1.44 Circuit Length Verification Test1. Set megohmeter to measure capacitanceand set meter to 200 nF range.2. Connect positive alligator clip to braid wire.3. Connect negative alligator clip to bothbus wires.4. Multiply this reading by capacitancefactor indicated on the right to determinetotal circuit length (in eat Weather-Ready Roof & Gutter De-Icing System Installation Guide13

SECTION 11.      5 Insulation Resistance TableIf the reading on the insulation resistance test does not pass the requirements at anypoint of the installation, halt installation immediately and contact Nuheat TechnicalServices at 1.800.778.WARM (9276).pre-INSTALLATIOnRecord heating cable insulation resistance test in the table below and leave with theend user for warranty purposes:INSULATIONRESISTANCERun 1BeforeInstallingheating cableAfterBefore InitialInstallingstart-upConnection kits (commissioning)@ 500 Vdc1.5@ 1000VdcInsulation Resistance TableRun 2@ 500 Vdc@ 1000VdcRun 3@ 500 Vdc@ 1000VdcRun 4@ 500 Vdc@ 1000VdcRun 5@ 500 Vdc@ 1000VdcFailure to record insulation resistance tests in the above table will voidthe Nuheat Weather-Ready Roof & Gutter De-Icing System warranty.The Nuheat standard limited warranty for freeze protection products applies to PipeFreeze Protection and Roof & Gutter De-icing products.Nuheat self-regulating cable is eligible for an additional seven (7) year warranty (totalperiod of ten [10 ] years) provided the online warranty form (available at nuheat.com)is fully completed and registered within thirty ( 30 ) days from the date of installation.14Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide

[ ] It is VERY IMPORTANT to plan the installation before securing any part of theheating cable system to the roof and / or gutter system. Note the location ofthe controls and / or junction boxes.SECTION 1Plan installation layoutPre-installation checks1.      6 Pre-Installation ChecklistDesign Notes[ ] Review any design notes provided by Nuheat’s Customer Care Team. Notespecific installation instructions and plan which direction / sequence thecable will be installed.Circuit Lengthspre-INSTALLATIOn1.6[ ] Observe the maximum circuit lengths of the cable ( Appendix 1; page 31 ) anddo not exceed these limits during the installation. Exceeding the maximumcircuit lengths will result in breaker trips which will prevent the heating cablefrom turning on when snow/ice is present.Accessories[ ] Ensure you have all the necessary connection / splice kits and accessoriesincluding roof clips and downspout hangers ( if applicable ).Visually inspect heating cable[ ] Unpack and perform visual inspection of the entire heating cable for anyvisible damage. If the heating cable is damaged, do not begin installation.Contact Nuheat Customer Care Team at 1.800.778.WARM ( 9276 ).Insulation Resistance and continuity tests[ ] Perform insulation resistance and continuity tests. Refer to testing procedureson page 12 of this manual.Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide15

SECTION 2installation2.1 Gutters172.11Single Run of Heating Cable . 172.12Double Run of Heating Cable .17SECTION 22.2 Downspouts182.21Entering Downspout . 182.22Entering Downspout: Tee Splice Method . 192.23Exiting Downspout: Above Ground . 192.24Exiting Downspout: Below Ground . 20INSTALLATION2.3 Roofs2.312.322.332.342.3521Sloped Roof . 21Heating Roof Drains . 22Flat Roof . 23Metal and Standing Seam . 24Valleys and Wall Intersections . 252.4 post-installation checks1626Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide

2.1 Installation: GuttersLay heating cable at base of gutter to create / maintain drain paths for melt water.Gutters2.11 Single Run of Heating CableSECTION 2Install heating cable along gutter base to prevent ice dams and ice build-up inside thegutter system. Ice build-up can lead to icicle formations which may damage the guttersystem, as well as pose a safety risk ( i.e. potential falling icicles ).Heating cable2.1GutterINSTALLATIONFIGURE 2 .11: Single Run in Gutter2.12 Double Run of heating cableFor gutters wider than 6” ( 150mm ), use two runs of heating cable inside gutter. Toensure optimal cable spacing of 4” - 6” ( 100 - 150mm ), secure heating cable to Nuheatdownspout hangers or roof clips.Downspout hangerRoof clipFIGURE 2 .12: Double Run in GutterNuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide17

2.2 Installation: DownspoutsInstall heating cable inside all downspouts to prevent ice dams from forming within thegutter system. Heating downspouts will create drain paths for melt water to exit thegutter system and reduce the risk of ice and snow damage.SECTION 22.21 entering DownspoutInstall heating cable inside the downspouts to ensure ice does not build-up andprevent melt water from exiting the gutter system.! Use downspout hangers to protect cable from sharp edges orprotrusions in the gutter.INSTALLATIONHeating cableCable tiesDownspout hangerGutter2.2DownspoutDownspoutsFIGURE 2 .21: Heating Cable Entering DownspoutAlternatively, use loop-back method to extend heating cable into downspout. Createa loop in a single run of heating cable. Extend loop into downspout until it reachesdownspout exit.! Use downspout hangers to protect cable from sharp edges orprotrusions in gutter.GutterCable tiesDownspout hangerHeating cableCable tiesDownspout hangerHeating cableFIGURE 2.22: Loop-back Method18Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide

2.2 Installation: Downspouts2.22 Entering downspout: Tee Splice MethodInstall connection components according to installation instructions included inconnection kits. Extend a single heating cable run into downspout until it reachesdownspout exit.! Use downspout hangers to protect cable from sharp edges orprotrusions in the gutter.Downspouts! Test continuity of each cable run before installing heat shrinks.SECTION 2If necessary, use a Nuheat splice / tee kit to create a tee-splice at entrance to downspout.Tee - spliceHeating cableCable ties2.2Downspout HangerINSTALLATIONFIGURE 2 .22: Tee - Splice Method2.23 Exiting Downspout: Above GroundIf a single run of heating cable is used in the downspout, terminate cable with end seal.Create a drip loop extending 1” ( 25mm ) past downspout exit. Secure end seal 12”( 300mm ) up from downspout exit.! Ensure all cable protruding past lower opening of downspout isnot susceptible to damage.End sealCable tiesGutter12”1”FIGURE 2.23: Exiting Downspout Above GroundNuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide19

2.2 Installation: Downspouts2.24 Exiting Downspout: Below GroundSECTION 2Determine the frost line depth based on the geographic region. If using the loop-backmethod to extend the heating cable into downspout, ensure the loop of heating cableat the bottom of the downspout extends below the frost depth.If a single run of heating cable is extended into the downspout, create a drip loop andsecure the end seal to the heating cable prior to inserting the cable into downspout.! Ensure all cable protruding past downspout opening is notsusceptible to damage.INSTALLATIONGutterEnd sealCable ties2.2Downspouts12”Frost lineHeatingcableFIGURE 2.24: Exiting Downspout Below Ground20Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide

installation: Roof2.3On sloped roofs, the heating cable is generally installed in a zig-zag pattern above theun-insulated overhang section of the roof.2.31 Sloped RoofAttach heating cable to roof using roof clips in a triangular pattern along roof edge. Seefigure 2.31.SECTION 2Ice dams may form at roof edge because the section of roof above overhang is uninsulated. Install heating cable on this section of the roof to create / maintain drainpaths for melt water to flow off the roof and into gutter system.2.3 Roof! Ensure top of triangle is approximately 6” ( 150mm ) past theexterior wall.! Ensure distance between triangles is approximately 24” (600mm).INSTALLATIONExtend drip loops past roof edge into gutter. If heating cable is installed along gutterbase, connect drip loop to gutter run using UV-resistant cable ties. This will ensure themelt water has a continuous path from roof to gutter.Roof clip6”Cable ties24”Heating cableGutterExterior wallFIGURE 2.31: Sloped RoofNuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide21

2.3installation: Roof2.32 Heating Roof DrainsSECTION 2To maintain proper roof drainage and prevent ice damage, install heating cable fromroof edge to roof drain. Extend heating cable loop into roof drain, ensuring cablereaches 12” ( 300mm ) into heated zone below roof.Roof drainINSTALLATIONHeating cable12”2.3RoofFIGURE 2.32: Roof Drains22Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide

2.3installation: RoofFlat roofs are usually pitched to direct water to roof drains, downspouts or scuppers.Install heating cable around the perimeter and along the melt water path to roof drains,downspouts or scuppers. Use roof clips to secure the heating cable.Junction boxRoof clipHeating cableSECTION 22.33 Flat Roof2.3ROOFRoof drainINSTALLATIONEnd sealFIGURE 2.33a: Flat Roof to DrainJunction boxRoof clipHeating cableEnd sealScuppersFIGURE 2.33b: Flat Roof to ScuppersNuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide23

2.3installation: Roof2.34 Metal and Standing seamSECTION 2Metal/Standing seam roofs are most common in commercial or industrial applications.Typical seam distance varies between 18” (460mm) to 24” ( 610mm). Using roofclips, attach heating cable to roof along seam. Run heating cable over seam andreverse direction. Extend heating cable past roof edge and into gutter. Lay heatingcable horizontally along gutter base. Heating cable should be installed alongevery other seam.! Ensure loop of heating cable extends approximately 6” ( 150mm )up past exterior wall.INSTALLATION! Distance between cable runs should not exceed 24” ( 610mm).2.3RoofRoof clipSeam6”Cable tiesHeating cableEnd sealGutterFIGURE 2.34: Metal & Standing Seam Roof24Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide

2.3 Installation: RoofWhen sloped sections of roof meet or are intersected by a wall, the roof forms a valleyor wall intersection. In both instances, run the heating cable two-thirds up the valleyor wall intersection and back down to maintain drain paths.¹ ³ValleySECTION 22.35 Valleys and Wall Intersections2.3Roof²   ³INSTALLATIONHeating cableRoof clipsFIGURE 2.35a: Sloped Roof Valley¹ ³²   ³4”6”-32””Wall intersectionRoof clipsHeating cableGutterFIGURE 2.35b: Wall IntersectionsNuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide25

2    .   4 Post-Installation ChecklistDownspout hangers[ ] Use downspout hangers to ensure heating cable is protected from potentialmechanical damage.SECTION 2Insulation Resistance tests[ ] Perform insulation resistance tests. Refer to testing procedures on page 12of this manual.Circuit LengthsINSTALLATION[ ] Observe the maximum circuit lengths of the cable ( Appendix 1 on page 31)and do not exceed this limit during the installation. Exceeding the maximumcircuit lengths will result in breaker trips which will prevent the heating cablefrom turning on when snow/ice is present.2.4Post-installation checks26Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide

3.1Electrical connections& controlsElectrical connections & controlsSECTION 3electrical connections283.11Power Connection . 283.12Drip Loop . 283.3control options303.31Automatic Snow Controllers . 303.32Slab Sensing Thermostat . 303.33Manual On / Off Control . 303.4repairs AND maintenance3.5 Appendix 13031Nuheat Weather-Ready Roof & Gutter De-Icing System Installation GuideSECTION 33.2 Typical wiring diagrams293.21Single Circuit Control . 293.22Group Circuit Control . 2927

Electrical connections & controls3.1 Electrical Connections3.11 Power ConnectionAfter heating cable and related accessories are installed, install power connectioncomponents according to installation instructions included in connection components.Visually inspect the entire circuit and perform insulation resistance tests for eachcircuit before connecting heating cable to power.3.12 Drip LoopSECTION 3Create drip loops to prevent water from trailing into any electrical equipment, junctionboxes, or controls.Heating cableJunction box3.1Drip loopelectrical connectionsFIGURE 3.12: Drip Loop28Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide

Electrical connections & controls3.2 Typical Wiring Diagram3.21 Single Circuit COntrolTemperature Controller1-Pole GFEP BreakerØ1 Ø Supply3.22 Group Circuit COntrolTemperature ControllerØ1 Ø SupplyNعزس3.2Contactortypical wiring diagramC3-Phase 4-Wire Supply1-Pole GFEP BreakerSECTION 3NHeating CableNGNUHEAT INDUSTRIES AND NEC REQUIRE 30 mA EQUIPMENT GROUNDFAULT PROTECTION ON EACH HEATING CABLE BRANCH CIRCUIT.Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide29

Electrical connections & controls3.3 Control OptionsThere are several options available to control the Nuheat Roof and Gutter De-icingCables. Consult the electrical contractor to determine the most suitable option.Selecting the proper control option will limit the power consumption of the de-icingsystem by turning on the heating cables only when it is needed.3.31 Automatic Snow Controller Activates system when precipitation AND low temperatures are detectedSystem remains “ON” once precipitation or low temperature have ceased,allowing the surface to completely dry, preventing the formation of surface iceWhen combined with a slab-sensing thermostat, the system will de-energizeonce the slab has reached the preset or user-defined temperature setpointSECTION 33.32 Ambient Sensing Thermostat Turns on the heating cable when the ambient temperature drops below apreset or user-defined temperature (usually set at freezing point)Not as energy efficient as ambient temperature may be below freezing butno precipitation/snowfall is present3.33.33 Manual On / Off ControlControl options / 3.4 Low initial costRecommended only for small areasRequires manual monitoringProne to be left on accidentallyInstall the controls as per installation instructions that accompanycontrol unit. Ensure controller or contactor being used is appropriatefor electrical load.Repairs and maintenance3.4repairs and MaintenanceIf any part of the cable becomes damaged at any time, please contact NuheatCustomer Care Team immediately at 1.800.778.WARM (9276).Perform visual inspection, and insulation and continuity tests annually before eachwinter season. Ensure control system is functioning before each winter season.30Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide

Electrical connections & controls3.5 Appendix 1Maximum Circuit Lengths120V240V C15A20A30A40A15A20A30A40AR8P55010215215

10 Nuheat Weather-Ready Roof & Gutter De-Icing System Installation Guide sect I on 1 1.3 Sy ST em C O mp ON e NTS SYSTEM COMPONENTS 1.35 roof cLIPs The heating cable can be attached to a roof using Nuheat roof clips. Secure Nuheat roof clips to roof using screws, nails or adhesives. If screws or nails are used, weatherproof