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To use the 3M Heat Trace Bill of Materials Tool, visit

3M.ca/HeatTrace

To use the 3M Heat Trace Bill of Materials Tool, visit

3M.ca/HeatTrace

33

Introduction

Ref #

Part #

Description

Cable

1

KSR-2-OJ

208 - 240 Vac

Termination kits

2

KSR-CFK1

Power connection/end termination kit w/o junction box

3

KSR-EJK

Expansion joint kit

6

KSR-SK-DB

Splice kit

Installation accessories

4

CL

Caution labels (25 per pack)

5

CT8BK50-C

3M™ Weather Resistant Cable Ties (100 per Pack)

Controls

7

STC-DS2C

Snow and ice sensor, pole mounted

7

R3C-0120-DP

Weatherproof indoor/outdoor thermostat

1

Junction box appropriate for the application to be supplied by the installer.

Snow melting systems have been steadily increasing in popularity during the last few years. This is due in part

to the risk management demands placed on building owners and occupants to provide clear and safe access to the

facilities even during inclement weather. The intent of this guide is to simplify the design and installation of an electrical

snow and ice melting system.
While there are many methods for determining the heating requirements of a snow and ice melting system, the goal

is to keep the protected area safe and accessible. The severity of weather in which the system must perform is of

primary significance. Therefore, it is important to establish a performance level1

as the amount of materials and power

requirements are directly related to the weather conditions.
Establishing a proper sequence of planning, procurement, installation and performance expectations before each

function occurs will ensure successful installation of a heat tracing system. To facilitate this interaction, this guide

2

has been assembled to assist engineers and contractors.

Notes:

1. The examples and descriptions contained in this guide are based on structurally sound, steel-reinforced slab-on-grade concrete 4 to 6 inches thick. The amounts of heat provided in the design tables are for

snow and ice melting at the rates indicated. Preventing accumulation from drifting snow or runoff from other sources may require additional heating cable. Should design conditions vary from those shown,

please contact a 3M representative for assistance.

2. The formulas, calculations, charts, tables and layout information presented have been researched for accuracy; however, the design and selection of a snow and ice melting system are ultimately the

responsibility of the user.

Note: more control options in Alternative Accessories section starting on page 39.

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5

3

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Содержание KSR-2

Страница 1: ...To use the 3M Heat Trace Bill of Materials Tool visit 3M ca HeatTrace 1 3M Self Regulating Heat Tracing Cables Application Guide ...

Страница 2: ...Step 4 choose TTS Self Regulating Heating Cable installation accessories 16 Tips 16 17 Thermostatic Control 17 18 TTS Self Regulating Heating Cable Pipe Freeze Protection Data Sheet 18 19 Roof and Gutter Snow and Ice Melting Ordering Information and Basic Components TTS Self Regulating Heating Cable 21 22 Roof and Gutter Snow and Ice Melting Materials Guide TTS Self Regulating Heating Cable 23 Int...

Страница 3: ...eating a Materials List 32 Step 1 identify area requiring snow and ice melting 32 Step 2 determine level of protection required 32 33 Step 3 determine length of cable required and circuit lengths 33 34 Step 4 locate power connections and end terminations lay out cable 34 35 Step 5 establish control method to operate system 36 Cable Spacing Selection Guide 36 37 KSR Self Regulating Heating Cable Su...

Страница 4: ...stance of the heating element increases This causes the heat output of the cable to decrease As the temperature of the heating matrix increases the resistance of the heating matrix increases This is a self regulating effect TTS and KSR Self Regulating Heating Cables can adjust their output to the surrounding temperature down the cable length This adaptability to individual thermal conditions provi...

Страница 5: ...tances Copper grounding braid serves as a safety conductor The cable is quipped with an outer protective jacket Benefit the cable can be cut to any desired length without changing TTS and KSR Self Regulating Heating Cable properties Benefit provides a continuous ground path Benefit the cable can respond to the temperature conditions and adjust the heat output at any point of the cable Benefit help...

Страница 6: ...ce Bill of Materials Tool visit 3M ca HeatTrace 6 1 Pipe Freeze Protection Legend 2 Roof and Gutter Snow and Ice Melting 3 Surface Snow and Ice Melting 1 1 2 2 2 2 3 3 3 3 3 3M Self Regulating Heat Tracing Cable Applications ...

Страница 7: ...To use the 3M Heat Trace Bill of Materials Tool visit 3M ca HeatTrace 7 2 2 2 2 2 3 3 3 3 ...

Страница 8: ...To use the 3M Heat Trace Bill of Materials Tool visit 3M ca HeatTrace 8 Pipe Freeze Protection ...

Страница 9: ...is a small project or a complex network designing an electric heat trace system is easy with TTS Self Regulating Heating Cable Please refer to the TTS Self Regulating Heating Cables materials guide for Pipe Freeze Protection on pages 10 11 of this catalogue for full details TTS Self Regulating Heating Cables are approved for use in ordinary non classified and hazardous classified areas Freeze prot...

Страница 10: ...on gland kit w o junction box 2 ECA 1 SR SP Power connection kit with metallic junction box 2 PCA 1 SR Power connection kit with non metallic junction box 4 PCS 1 SR T splice kit with non metallic junction box1 8 HS PBSK Inline heat shrink splice kit under insulation 4 HS TBSK T splice heat shrink kit under insulation 5 ET 6C End termination kit ordinary and div 2 approved Installation accessories...

Страница 11: ...To use the 3M Heat Trace Bill of Materials Tool visit 3M ca HeatTrace 11 4 5 6 7 9 1 8 3 2 ...

Страница 12: ...rotection of metallic and non metallic pipes by replacing the heat lost through the thermal insulation into the air Whether the application is a small project or a complex network of piping and equipment designing an electric heat traced freeze protection system is easy with TTS Self Regulating Heating Cable The information contained in this materials guide will take you through a step by step pro...

Страница 13: ...ting Heating Cable Using the pipe diameter insulation thickness and minimum expected ambient find the recommended heating cable using Selection Chart 1 2 1 Metallic Piping on page 14 or Selection Chart 1 2 2 Non metallic Piping on page 15 If the pipe size or insulation information does not appear contact 3M at 3Menergysolutions mmm com 1 Select the vertical column headed by a low ambient temperatu...

Страница 14: ...1 One Pass TTS 8 One Pass TTS 8 One Pass TTS 8 One Pass TTS 8 Two Passes TTS 8 Two Passes TTS 8 Two Passes TTS 8 Two Passes TTS 10 Contact 3M Two Passes TTS 8 Contact 3M Contact 3M Selection Chart 1 2 1 Metallic Piping Example on how to read the Metallic piping chart Example A 4 diameter metallic pipe that will be insulated with 1 fibreglass must not freeze even with a minimum expected ambient tem...

Страница 15: ... 1 2 3 4 6 8 10 12 14 1 1 5 2 1 1 1 4 1 1 2 2 2 1 2 3 4 6 8 10 12 14 1 1 1 4 1 1 2 2 2 1 2 3 4 6 8 10 12 14 1 Non metallic Piping Selection Chart 1 2 2 Non metallic Piping Additional considerations for non metallic piping For freeze protecting non metallic pipes TTS Self Regulating Heating Cable is to be installed with a continuous covering of 3M Aluminum Foil Tape The data in selection chart 1 2 ...

Страница 16: ... available voltages gathered as part of Step 1 TTS Self Regulating Heating Cable intended for use on 110 120 Vac will have a catalogue number followed by a 1 i e TTS X 1 TTS Self Regulating Heating Cable intended for use on 208 240 Vac will have a catalogue number followed by a 2 i e TTS X 2 In Step 2 the proper TTS Self Regulating Heating Cable 5 8 or 10 was selected from selection chart 1 2 1 or...

Страница 17: ... 10 50 18 0 29 20 40 40 240 73 170 52 150 46 135 41 320 98 225 69 200 61 180 55 405 123 340 104 305 93 275 84 405 123 405 123 405 123 365 111 Table 1 3 2 Table 1 3 3 Example Continuing with the first example from page 10 the 4 diameter metallic pipe is 60 long has one screwed valve and is supported by 6 metal pipe hangers The heating cable allowances for the circuit would be as follows Pipe Length...

Страница 18: ...in line can be looped double passed on the branch line This eliminates the need to install a T splice kit 4 What to do when all heating cable power connection points need to be secured to the piping Heating cable should not pass through the air to travel to an adjoining pipe Instead use multiple circuit fabrication kits interconnected with conduit and field wiring as shown Step 4 Choose TTS Self R...

Страница 19: ...pewall sensing Each method has its own benefits and various options are available within each method Ambient Sensing An adjustable thermostat designed for mounting in an exposed environment senses the outside air temperature When this temperature falls below the setpoint a set of contacts close and energize the heating cable s Should the electrical load of the heating circuit exceed the rating of ...

Страница 20: ...es 110 120 or 208 240 vac Max Maintenance temperature 65 C 150 F Max Continuous exposure temperature power off 85 C 185 F Minimum installation temperature 51 C 60 F Minimum bend radius 32 mm 1 25 T rating T6 85 C 185 F Basic Accessories Power Connection All TTS Self Regulating Heating Cables require an ECA PCA or 18 SXG KIT power connection kit for terminating the circuit before connecting to powe...

Страница 21: ...10 1 Circuit Breaker Size Cable Type Start Up Temp 30 A 20 A 15 A C F 40 A 10 50 18 0 29 20 40 40 180 55 155 47 140 43 125 38 240 73 205 62 185 56 165 50 285 87 285 87 275 84 250 76 285 87 285 87 285 87 265 81 10 50 18 0 29 20 40 40 145 44 115 35 100 31 90 27 195 59 150 46 135 41 120 37 240 73 225 69 200 61 180 55 240 73 240 73 240 73 215 66 10 50 18 0 29 20 40 40 120 37 85 26 75 23 70 21 160 49 1...

Страница 22: ...To use the 3M Heat Trace Bill of Materials Tool visit 3M ca HeatTrace 22 Roof and Gutter Snow and Ice Melting ...

Страница 23: ...ion is a small project or a complex network designing an electric heat trace system is easy with TTS Self Regulating Heating Cables Please refer to the basic components section for roof and gutter snow and ice melting on page 24 of this guide for full details TTS Self Regulating Heating Cables are approved for use in ordinary non classified and hazardous classified areas Roof surfaces asphalt shin...

Страница 24: ... ET 4S End termination kit HS PBSK Inline splice with heat shrink HS TBSK T splice with heat shrink Installation accessories 3 AL 20L 3M Aluminum Tape 2 X 150 in gutter 4 CL Caution labels 25 per pack 6 RG CMC P style roof cable mounting clips 100 bag 5 RG CRF Roof clips cable roof fastener 25 bag 7 RG DCH Downspout cable hanger 2 hangers needed per downspout Controls 9 STC DS2C Snow and ice senso...

Страница 25: ... or heavy levels based on the variables below If any variable falls into the heavy category plan the system for heavy accumulation to ensure adequate protection for the building Should weather conditions the building s design orientation or the expected usage of the facility dictate increase the amount of cable to be installed Introduction This guide provides a basis for a roof and gutter snow and...

Страница 26: ...ting Cables circuit length If breaker size will be dictated by heating cable requirements determine the optimal TTS Self Regulating Heating Cables circuit lengths based on the project size and cable layout 3 x The maximum circuit lengths shown in Table 2 1 are based on TTS Self Regulating Heating Cables start up at an ambient temperature of 7 C 20 F Because the power output of TTS Self Regulating ...

Страница 27: ...across to the spacing pitch column that corresponds to the roofing material The number where the row and column intersect is the multiplier for that application You then need to multiply this number by the number of linear feet of roof eave to be protected and add sufficient cable to reach the power supply junction box plus any additional cable to allow for on site variations Spacing Pitch Overhan...

Страница 28: ...lect the row with the corresponding overhang distance and follow across to the multiplier that matches the level of protection desired After selecting a multiplier read the corresponding spacing pitch value at the top of the column Multiply this number by the number of linear feet of roof eave to be protected and add sufficient cable to reach the power supply junction box The heating cable may be ...

Страница 29: ...plied by installer 2 CL Electric Heat Tracing caution labels peel and stick to junction boxes breaker panels and control panel s or as required by code or specification 3 RG CMC cable mounting clips secure TTS Self Regulating Heating Cable to the roof utilizing screws and a waterproof cover material 4 RG CRF cable roof fasteners attach TTS Self Regulating Heating Cable to roof or fascia materials ...

Страница 30: ... the circuit before connecting to power End of Circuit Termination TTS Self Regulating Heating Cables require the ET 4S end cap for terminating the end of the circuit Note T rating is per the 1996 NEC Tables 500 3 d 505 10 b and as verified by Factory Mutual Research and the Canadian Standards Association Canadian Standards Association Ordinary Non Classified Locations Hazardous Classified Locatio...

Страница 31: ...To use the 3M Heat Trace Bill of Materials Tool visit 3M ca HeatTrace 31 Surface Snow and Ice Melting ...

Страница 32: ...ly approved for direct burial KSR Self Regulating Heating Cables withstand harsh installation environments Building entrance and exit locations Ramps and accessibility routes Stairs and footpaths Certifications Approvals Description Areas of Application Ratings Canadian Standards Association Ordinary Non Classified Locations Meets or exceeds IEEE 515 1 UL 1588 CSA 130 16 Available watt densities 8...

Страница 33: ...ble The severity of weather in which the system must perform is of primary significance Therefore it is important to establish a performance level1 as the amount of materials and power requirements are directly related to the weather conditions Establishing a proper sequence of planning procurement installation and performance expectations before each function occurs will ensure successful install...

Страница 34: ...at tracing For example the public employee entrance to a facility is exposed to weather with only the area directly in front of the entry doors covered by a roof The building is adjacent to the concrete on two sides with the accessibility ramp which has a retaining wall located on the third side Snow removal can only be accomplished at the curb and parking area a choice found undesirable for vario...

Страница 35: ...conditions ambient temperatures between 6 C 20 F and 1 C 34 F with wind speeds of 5 to 24 km h 15 mph Should the ambient temperature fall below 6 C 20 F during the snowstorm some snow accumulation could occur but will be melted at the rate of fall Snowfall Severity KSR Self Regulating Heating Cable Spacing Category Rate of snowfall Non critical Critical Light hour 12 O C 7 O C Moderate 1 hour 9 O ...

Страница 36: ...stem can be determined As the example facility will have 208 Vac single phase four wire available KSR 2 cable is selected To optimize the circuit length potential the branch circuit breakers will be sized to reflect the layout of the cable see Step 4 for cable layout Design step 4 specify locations for power connections end terminations and layout cable on scaled drawing Total KSR Self Regulating ...

Страница 37: ...e entrance doors was ultimately selected because the room located behind it would make an excellent location for the snow melting power distribution and control panel When finished the system layout will be as shown at right in Figure 3 4 5 Note how the heating cable has been routed to minimize the number of crossings at expansion joints Additionally all power connections and end terminations orig...

Страница 38: ...M for assistance at 3Menergysolutions mmm com Example Because the facility will be occupied during normal business hours the system is to be controlled automatically To accomplish this an STC DS 2C snow and ice sensor will be utilized A power distribution and contactor panel would consist of a main three pole breaker a three pole contactor and three 40 amp branch circuit breakers equipped with 30 ...

Страница 39: ... in the Cable Spacing Selection Guide chart show the calculated percentage of snowfall hours that a surface will remain clear of snow when a predetermined level of heating is installed This method is useful when comparing what additional benefit in terms of keeping an area clear is obtained when the watts ft2 are increased While it is necessary to have weather data to establish values for temperat...

Страница 40: ...d fault protection required Data sheet KSR Self Regulating Heating Cable for Surface Snow and Ice Melting Silicone Rubber Outer Jacket Nickel Plated Copper Bus Wires Tinned Copper Braid Semiconductive Heating Matrix Fluoropolymer Insulation Construction Catalogue Number Start Up Temperature Operating Voltage Installation Method Maximum Circuit Length vs Breaker Size 15 Amp 20 Amp 30 Amp 40 Amp KSR...

Страница 41: ...ainless steel pipe attachment bands Heater cable grommets 3 power connection boots TBX 3L RTV adhesive Wire fasteners and grounding splice lug 3M Non Metallic Power Connection Kit PCA 1 SR Designed for connecting up to three heating cables to power The PCA 1 SR may also be used as an in line or T splice connection kit The PCA 1 SR kit components include NEMA 4X junction box Pipe mounted expediter ...

Страница 42: ...ide visual indication of an energized heating circuit The DE B utilizes a high intensity green LED assembly for superior day or night visibility Type 4X pipe mounted fitting with locking splice cover stainless steel pipe attachment band for piping 10 or less SCTK termination kit required order separately Power Connection Splice and End Termination Kits 3M End Termination Kit ET 6C End termination ...

Страница 43: ... cap Both power and end terminations must be made in UL listed or CSA Approved junction boxes End Boot for DE B SCTK 1D Splice connection termination kit includes power boots wire spring connectors RTV adhesive 3M In Line Splice Kit HS PBSK Heat shrink inline splice kit designed to join two heater cables together Kit components include a heat shrink sleeve two silicone sleeves two butt connectors ...

Страница 44: ...justable temperature trigger set point from 1 C to 7 C 34 F to 44 F with manual on off automatic and standby switching functions The STC DS 2C operates on a 120 Vac or 208 240 Vac power source providing a single 30 amp normally open load contact set rated to 277 Vac Contactor may be required Not included in kit Snow and Ice Sensor Controller STC DS 8 Gutter snow and ice sensor controller that can ...

Страница 45: ...0 C 392 F Bulb dimensions R1 6 x 300 mm 1 4 x 12 R3 6 x 140 mm 1 4 x 5 1 2 Bulb material Copper Capillary length 300 cm 10 Capillary material Copper Notes 1 The R1 includes two or conduit knockouts with an internal grounding terminal 2 The R3 includes two NPT conduit hubs with an internal grounding terminal Application electric heat tracing control The R1 and R3 equipped with double pole switches ...

Страница 46: ...Allow one foot of tape for each foot of heating cable Tape is 2 in 51 mm wide x 150 in 55 m long 3M Fibreglass Cloth Tape B Tape Fibreglass cloth tape for circumferential banding cable to piping every 12 in 30 cm or as required by code or specification Tape is 1 2 in 13 mm wide x 180 in 55 m long Max exposure temp 150 C 300 F Min installation temp 0 C 32 F Min operating temp 40 C 40 F Installation...

Страница 47: ... a waterproof cover material Screws and waterproofing are not included 100 bag 3M Performance Plus Wire Connectors B G O B R Y T R and T Y 3M Performance Plus Wire Connectors are used to connect the conductor ends inside metallic or non metallic junction boxes They combine a very small shell with an increased wire range The spring bites wire quickly with less effort and the small shell fits easily...

Страница 48: ... Cables must be in accordance with all local regulations and or building codes Please consult your local authority For more information about 3M electrical products and solutions contact us at 3Menergysolutions mmm com 3M 3M Science Applied to Life and Performance Plus are trademarks of 3M Used under license in Canada TTS and KSR are trademarks of Thermon Manufacturing Ltd used with permission in ...

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