Warmlyyours Floor Heating Under Concrete Slabs User Manual download pdf

Free Design Service • 24/7 Installation Support • No Nonsense™ Warranty •(800) 875-5285 • www.WarmlyYours.com

Getting Started Material and Tools Required:

WarmlyYours Snow Melt Mats and/or Cables

Controller, sensor(s), relay panel and Plaque

Custom Design Layout (provided FREE with order)

Digital Ohms Meter & 500 VDC Digital Megohm Meter (Megger)

Amp Meter, Plastic cable ties, & Scissors

Please call WarmlyYours (800) 875-5285 for 24/7 installation and technical

support if needed.

Step 1 – Electrical Rough-In

The electrician will supply appropriately sized dedicated breakers for each

heater circuit (30mA trip GFPE breakers may be required by NEC or local

codes). The relay panel(s), if necessary, must be installed, and power routed

from the breakers to the relay panel(s). Any junction box(es) required for cold

lead extensions/splicing should be installed at this time. The thermostat and its

junction box, relay panel(s), if necessary, and associated wiring & conduit should

be installed.

Step 2 – Mat/Cable Heater Installation

When material order shipment arrives, use ohms meter to test each mat heater

(between the two conductors), and verify number with the UL tag. Also, test

each heating mat for megohms (between conductor and yellow/green ground

wire). The 500 VDC Megohm Meter tests for insulation resistance around the

conductor(s), and should read inﬁ nite, OL, or a minimum of 10 megohms.

Step 3 – Basic Preparation

The concrete installer ensures that the base has at least 8” to 12” of crushed

rock aggregate that has been spread, and rolled over or tamped down. A 4” to

12” layer of sand is spread evenly over the aggregate. 2” polystyrene insulation

(or better) must be placed on top of the sand layer (insulation must never make

direct contact with heating cable). This insulation should also be placed vertically

around the perimeter of the slab to prevent “edge heat loss”. Heavy-gauge wire

mesh or rebar should be used for reinforcement (chicken wire is not acceptable).

This rebar, or wire mesh, may be propped up with wire chairs or concrete pavers.

Installing Floor Heating

Under Concrete Slabs

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Free Design Service • 24/7 Installation Support • No Nonsense™ Warranty •(800) 875-5285 • www.WarmlyYours.comGetting Started Material and Tools Req

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Free Design Service • 24/7 Installation Support • No Nonsense™ Warranty •(800) 875-5285 • www.WarmlyYours.comStep 4 – Heater & Sensor Placement

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Warmlyyours Floor Heating Under Concrete Slabs User Manual