Effective immediately, the Schluter-DITRA-HEAT-E-HK heating cable testing and warranty requirements have changed as follows:
Test 1: Conductor Resistance - Required
Test 2: Continuity between Conductor and Ground Braid - Required
Test 3: Insulation Resistance - Recommended, no longer required
Test 4: Temperature Sensor - Required
While the insulation resistance test (Test 3) is no longer required, it is strongly recommended. This test is performed to help detect very small breaks throughout the heating cable insulation, which often remain undetected during the continuity test. Even though the breaks are small, they are likely to cause a current leakage to ground, which will result in the thermostat ground-fault circuit interrupter "GFCI" disabling the system. Therefore, customers that perform the insulation resistance test (Test 3) will extend their system warranty coverage by 5 years for a total of 15 years.
The following table provides an overview of the term and resolution for valid claims under the Schluter-DITRA-HEAT and Schluter-DITRA-HEAT-TB Limited Warranty* depending on which heating cable tests are conducted.
0 - 25
Cable replacement (prorated)
Test 1: Conductor Resistance +
Test 2: Continuity between Conductor and Ground Braid +
Test 4: Temperature Sensor