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King Electrical Floor Heating Cable Installation Manual

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General information

Electric ﬂoor heating is a simple, economical way to warm any ﬂoor providing years of lasting
comfort whether it is used as supplemental or the primary heating source. This installation
manual provides guidelines, safety warnings and describes the elements of properly installing
the King Electric ﬂoor heating system which are:

1. How to design the proper layout for the room.
2. How to select the right product for the application.
3. How to properly install the system.

King Electrical Manufacturing Co..
9131 10th Ave South
Seattle, WA 98108

1-800-603-5464
www.king-electric.com

Typical Installations

Tiles, Stone

Thin-set

Plywood subﬂoor

Scratch coat

(optional)

Backerboard

(optional)

Tiles, Stone

Thin-set

Scratch coat

(optional)

(optional)

Insulation

Concrete slab

Directly on plywood

Directly on concrete

Standard spacing = 3 inches

Insulated slab spacing = 3 inches
Un-insulated slab spacing = 2 inches

This installation manual DOES NOT provide detailed information regarding thermostat installation.
It is important to thoroughly review the thermostat installation manual included with the
thermostat. For additional information regarding any aspect of the King Electric ﬂoor heating
system, please contact us at:

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Summary of Contents for cable

Page 1: ... these instructions INSTALLATION MANUAL This installation manual includes factory guidelines for installing King Electric ﬂoor heating systems These guidelines must be followed to ensure warranty coverage Contact King Electric for any questions regarding proper installation of the heating cable ...

Page 2: ...rmostat Location and Strapping Layout 9 10 Materials Required 11 11 STEP 4 Electrical Rough in New Construction 12 12 STEP 4 Electrical Rough in for Remodel 13 13 STEP 5 Transfer Layout to Floor and Plan Cable Routing 14 14 STEP 6 Installing the Metal Strapping 14 15 STEP 7 Installing the Cold Lead 16 16 STEP 8 Lace the Cable Through the Strapping 17 17 STEP 9 Install the Floor Sensor 18 18 STEP 1...

Page 3: ... system King Electrical Manufacturing Co 9131 10th Ave South Seattle WA 98108 1 800 603 5464 www king electric com Typical Installations Tiles Stone Thin set Plywood subﬂoor Scratch coat optional Backerboard optional Tiles Stone Thin set Scratch coat optional optional Insulation Concrete slab Directly on plywood Directly on concrete Standard spacing 3 inches Insulated slab spacing 3 inches Un insu...

Page 4: ...eath This could result in contact with live electrical wires causing electrical shock 13 DO NOT use staples nails or similar fasteners directly on the cable Use only factory the factory strapping system to attach cable The use of any other fastening method will void the warranty 14 Use a smooth plastic trowel only NEVER bang or drop a tool on the cable Care should be taken not to nick or gouge cab...

Page 5: ... the multi meter to read ohms B Connect the ground wire braided un insulated wire to the black test lead of the multi meter and the red test lead to both the black and white wires of the cold lead C The meter should read OPEN or OL If you get a different reading the cable is damaged contact King Electric for support D Record the readings on the cable tag and in the cable test log 1 5 Resistance te...

Page 6: ...nsor to verify the integrity of the component A Set the multi meter to read ohms B Connect the mulit meter leads to the ﬂoor sensor wires C The meter should read between 8 25k ohms depending on the ambient temperature when taking the test If test results are not between 8 25k contact King Electrical for support D Record the readings on the cable tag and in the cable test log STEP 1 Inspecting and ...

Page 7: ...y or counter The cable is not to be installed under these type of items In addition DO NOT run cables into closets or conﬁned areas where heat could build up 2 3 Mark the locations of any toilets heating vents or any other heating appliance Note on the drawing that the heating cable must be installed at a minimum distance of A 6 from the center of the toilet drain B 8 form heating vents or any oth...

Page 8: ... is not typical that people will stand that close to the walls In addition the heat will radiate out an additional 2 from where the cable is embedded 2 6 In most cases simply select the cable kit that is 5 but no more than 10 less that the total square footage of the area to be heated as calculated in the previous step For example if the square footage after deduction the ﬁxed obstacles equals 74 ...

Page 9: ...40 134 1 75 110 145 1320 5 5 43 6 80 ft FC241440 480 146 3 80 120 160 1440 6 0 40 0 100 ft FC241680 560 170 7 95 140 190 1680 7 0 34 3 100 ft FC 241920 640 195 1 105 160 210 1920 8 0 30 0 100 ft FC 242160 720 219 5 120 180 240 2160 9 0 26 7 120 ft FC 242400 800 243 8 135 200 265 2400 10 0 24 0 120 ft FC 242880 960 292 6 160 240 320 2880 12 0 20 0 120 ft 240 volt cables are approved for 208 volt bu...

Page 10: ...he wall box and become the starting point for the heating cable as well as where the ﬂoor sensor will be installed continued STEP 3 Thermostat location and strapping layout T End Splice Cold Lead Thermostat 3 2 For walls or obstructions with angles or curves the strapping can be cut into smaller sections and installed as demonstrated in ﬁgure 1 7 Figure 1 7 ...

Page 11: ...er C Cable kit selected 90 ft D 100ft 90 ft 10ft unheated border E 10ft 40ft 25ft F 25ft x 12in ft 3 from the wall 2 2 2 2 2 2 Materials required 3 6 It is difﬁcult to predict exactly where the heating cable will end thus it is important to have a buffer zone A buffer zone is an area where heating in not essential and if unheated will go unnoticed This area is also used for any excess cable where ...

Page 12: ...lose to the bottom of sill plate as possible Chisel out the bottom of the sill so that the cold lead wire will not create a high spot in the ﬂoor when the thin set is applied Drill Vertical Hole 4 3 Drill a 3 4 hole vertically into the sill plate 1 1 2 deep If installing a ﬂoor sensor drill a second set of holes 4 away in the same stud cavity Install Nail Plate 4 4 Clear the cable routing holes of...

Page 13: ...emodel Cut Hole for remodel J box Install remodel J box 4 2R Install a remodel type electrical junction box for the thermostat and run the supply power into the box Chisel channel 4 4R Chisel out a 1 1 2 by 1 1 2 channel into the sill plate 1 1 2 deep If installing a ﬂoor sensor chisel a second relief 4 away in the same stud cavity Install Nail Plate 4 5R Install a nail plate to protect the wires ...

Page 14: ...is designed to be cut into smaller sections by using guides located every 6 Cut the strapping into smaller segments to ﬁt the cable layout scheme 6 2 Heating cable should be mounted 1 1 2 from a kick space shower or bathtub and between 1 6 from walls Shower Vanity Toilet 1 to 6 from wall 5 2 Plan the cable routing around the ﬁxed objects It is best to plan the cable runs parallel to the longest wa...

Page 15: ...ation in angled areas 6 7 When end strapping is greater than 4ft apart then the center strapping must be installed to secure the cable Snap a chalk line between the end strapping using the diamonds punched in the strapping to align the centers 6 8 For installation on concrete surfaces the metal strapping may be attached using double side tape hot glue or concrete anchors 1 to 6 from wall Center st...

Page 16: ...he tile has set If the cable monitor sounds an alarm stop and check the cable for damage The cable is only to be repaired with a factory splice kit 7 4 Secure any loose blue heating cable between the start of the run and the location where the cable is ﬁrst laced through the strapping Use the single hole straps provided Shower 7 2 Due to the large diameter of the cold lead splice a 25 deep channel...

Page 17: ... tabs in the semicircle 8 5 The tail splice is slightly larger in diameter than the heating cable and must be recessed into the subﬂoor Make a 25 channel into the subﬂoor and secure the tail splice into the channel and secure with hot glue 8 4 At the end of the run use the one hole strapping pieces cut from the center strapping to secure the cable ALWAYS maintain a minimum distance of 2 spacing IM...

Page 18: ... ﬂoor chisel a 25 channel into the ﬂoor and lay the sensor bulb into the channel Apply hot glue to secure the bulb into place Position ﬂoor sensor halfway between the heating cables Test cable before embedding STEP 10 Apply scratch coat Scratch coat application 10 1 Apply a scratch coat of thin set or self leveling mortar uniformily over the entire ﬂoor area Make sure the heating cables are comple...

Page 19: ...nect into the face of the thermostat away from the line voltage wires 11 2 Connect the power supply wires and the load side heating wires Follow the thermostat manufacturer s instructions Lace around end straps Thermostat wiring diagram CAUTION Allow mortar compound to completely cure before energizing cable This will ensure that the setting of the mortar mix will not be compromised by the heat of...

Page 20: ...essary maintenance be performed on the unit Failure of proper maintenance by owner will void the warranty in its entirety The company is not liable for any actions it deems to be abuse or misuse of the product The customer shall be responsible for all costs incurred in the removal or reinstallation of products including but not limited to labor costs and shipping costs incurred to return products ...

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