King Electric SCM - Manual (Page 17)

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Ceramic or Stone Tile Application continued:
Step 8: For either application below, exterior-grade materials should be selected and
installed per manufacturer’s recommendations. Only vitreous tile (non-porous) tile should
be used as other tile will absorb moisture which will lead to failure. The maximum thick-
ness above the cable should be no less than 1.5” and no more than 2.5”. A movement
joint should be installed between any heated and non-heated area.
1) Dry-set or Latex-Portland Cement (thin-set) Mortar Application - In this application, the
mat or cable is already installed in the concrete slab. The primary concern is to install a
cement mortar bond coat (thin-set) and tile according to Tile Council of North America
(TCNA) recommendations for exterior applications (F102-07). Mortar
and grout materials should be as specified per American National Standards Institute
(ANSI) for exterior applications.
2) Cement Mortar or Thick-set Application - In this application, the mat or cable is installed above the structural slab in a thick mortar bed and
bond coat according to TCNA F101.07. A 1.25” minimum mortar bed should be placed over the cable or mat according to ANSI A108.1A
guidelines. Above this layer, the mortar bond coat and tile is installed.
Step 9: Use a digital multi-meter to measure the resistance between the conductors of the mat/cable power leads again. Record these re-
sistances in SC Cable / SCM Mat Testing Log under the section “Test Record # 3 After Covering Is Applied ”.
Controls and Sensors Installation
• De-energize all circuits feeding this system before doing any electrical work.
• If a slab sensor is being installed, uncover the cap or seal on the embedded sensor socket. Feed the sensor leads through the conduit up to
the control. Secure the sensor into the socket and finish this installation as required by the sensor manufacturer.
• Make wire connections at junction boxes for the SC Mat/Cable power leads to the power wiring from the control. If the junction box is lo-
cated outdoors, it is highly recommended to use wet location rated wire nuts or crimps to avoid corrosion.
• Install the control at its location according to the instructions provided with the control. Make wiring connections to the power source and
to the sensor wires and mat/cable lead wires.
Important The ground wire supplied with the mat/cable must be connected to a suitable grounding/earthing terminal.
• After careful inspection of all wiring, connect the power supply wiring to the GFCI type circuit breaker and turn it on.
• Follow instructions for the control to set it up. The sensor should not allow the system to energize the SC until proper conditions exist. The
control may allow you to temporarily test the system for just a few minutes. If you have a clamp-on type electrical test meter, energize the
system briefly and verify it is drawing the proper level of current into the mat/cable as planned.
Important The ground wire supplied with the mat/cable must be connected to a suitable grounding/earthing terminal.
• After careful inspection of all wiring, connect the power supply wiring to the GFCI type circuit breaker and turn it on.
• Follow instructions for the control to set it up. The sensor should not allow the system to energize the SC until proper conditions exist. The
control may allow you to temporarily test the system for just a few minutes. If you have a clamp-on type electrical test meter, energize the
system briefly and verify it is drawing the proper level of current into the mat/cable as planned.
Important Do not fully energize the SC, except for this brief test, until the concrete is cured or asphalt is cool. This could cause
improper curing of the surface materials.
CAUTION: Do not operate the system with air temperatures above 50℉(10℃) except for this brief test. This will stress the materials and
reduce the life of the heating cable and may cause damage to the materials and heating cables.
SAVE THESE INSTRUCTIONS
INSTALLATION — TILE
KING ELECTRIC MFG CO · 9131 10TH AVENUE SOUTH · SEATTLE, WA 98108 · PH:206 762 0400 · FAX: 206 763 7738 · www.king-electric.com