Installation Manual

SYSTEM NOT WARMING
1. Do an amp draw test on the cables to verify proper operation.
2. Thermostat/control set at too low of a temperature. Adjust to higher temperature.
Because of the nature of slab heat, any changes in slab temperature will take time to
accomplish. Slab heat has a much slower reaction time that oor surface heating.
3. Severe Weather.
a. Extreme outdoor conditions may aect slab temperature. Depending on the
insulation values under the slab and around the perimeter of the slab, extreme
outdoor temperatures can adversely aect the nal temperature of the slab.
4. Insucient watt density. Verify spacing of product vs the design plan.
a. The more distance between the heating wire, the lower the watts per square foot.
The lower the watts per foot, the less satisfactory the performance. This type
of system will have to run longer amounts of time, and may not reach desired
temperature.
5. Wrong voltage is being supplied to heating cable.
a. Is 120V being supplied to a 240V cable?
b. Is the installed product drawing the correct number of amps?
6. Test ohms of heating product
a. Verify proper ohms per roll/cable
b. Verify no shorts or open circuits
7. Inspect breaker/reset
8. Inspect wiring and connections inside any junction boxes
9. Test ohms of sensor. Call WarmlyYours to verify value.
NO POWER TO HEATING PRODUCT
1. Test ohms of heating cables/rolls
a. Verify proper ohms per roll/cable
b. Verify no shorts
c. Verify no open circuits
2. Inspect breaker/reset
a. Verify proper operation
b. Verify proper amperage rating per install plan. Recalculate amp load.
c. Verify proper mA rating of breaker
d. Replace defective breaker
e. Verify use of dual pole breakers for 240V heaters
3. Inspect Relay panel (if present)
a. Inspect/replace any faulty wiring
b. Inspect/redo/replace any faulty wiring terminals
c. Inspect/replace relay
d. Verify proper trigger voltage entering relay panel/trigger relay
4. Inoperative Thermostat
a. Verify proper connections and power to controller
b. Verify proper voltage to controller
c. Verify voltage going into controller equals voltage exiting controller
d. Verify voltage of heating product matches that supplied to controller.
e. Verify proper setup/programming of controller
f. Test/inspect sensor/s for proper operation (see troubleshooting guide for controller)
g. Replace defective controller or sensor
5. Wrong voltage is being supplied to heating cable.
a. Has 240V been supplied to a 120V product? If so, test ohms of heating product.
b. Do the ohms match the data sheet for installed product?
c. Repair/replace damaged heating product.
6. Inspect wiring between breaker box and control, between control and sensor/s,
control and relay panel (if present), and between relay panel and any
junction box/es.
7. Inspect heater connections inside all junction boxes.
Slab Heat Troubleshooting Guide
12