King Electric TCM - Manual (Page 5)

Installation Diagram:
SAVE THESE INSTRUCTIONS
INSTALLATION—SAND BED APPLICATION
TC / TCM Installation in Sand Bed - Step by Step
STEP 1: PLAN YOUR LAYOUT
Make a sketch of the area to be covered with heating TC / TCM cables/mats. Determine the location of fixtures such as drains, pipes, electrical
conduits, structural members. Remember to keep a distance of 12 inches (30cm) around such obstacles. All obstacles that shall be in the con-
crete slab should be installed prior to TC / TCM cables/mats installation to avoid damaging the cable.
STEP 2: STARTING THE SAND BED
Ensure that the ground below the sand bed is well compacted, free of organic materials, and generally suitable for a stable for laying a suitable
foundation. Proceed to fill the area with washed masonry sand. The sand should be free of organic material, stones, debris or any other object
that could damage the cable. Moisten, and compact the sand. Raise the sand to a level of 12 inches below the bottom of the concrete slab, or as
specified by the engineer. The layer of sand should be at least 2 inches thick.
STEP 3: INSTALLING THE FLOOR SENSOR AND CONDUIT
A floor sensor for high temperature protection must be installed in rigid conduit. The conduit protects the sensor and facilitates its replacement
in the unlikely event of failure.
The sensor and the conduit may be installed during the initial construction work and then connected at a later date. Please observe:
1. Ensure that the conduit is sealed before the sand is poured.
2. The conduit must be positioned between the heating cables. This is usually 12 inches below the bottom of the concrete slab.
3. Keep the conduit as short as possible and to minimize the number of bends in the conduit. This will ease the installation of the sensor.
4. Place the sensor inside the tube until it reaches the end of the conduit.
5. Sensor & conduit should be placed within 3 to 6 inches of the heating cables and with at least 2 inches of concrete or sand above and below.
6. The floor sensor should be installed at least 3 feet (1m) into the heated area.
7. The floor sensor has a standard 10 foot (3m) lead that may be extended with 20 AWG wire.
KING ELECTRIC MFG CO · 9131 10TH AVENUE SOUTH · SEATTLE, WA 98108 · PH:206 762 0400 · FAX: 206 763 7738 · www.king-electric.com