Installation Guide

26 | nVent.com/RAYCHEM
6 THERMAL INSULATION AND MARKING
6.1 Pre-insulation checks
• Visually inspect the heating cable and components
for correct installation and damage. (See Section 10 if
damaged.)
• Insulation resistance (Megger) testing (as per Section 8) is
recommended prior to covering the pipe with thermal
insulation.
6.2 Insulation installation hints
• Correct temperature maintenance requires properly installed
and dry thermal insulation.
• Thermally insulate and weatherproof to design specification.
• Check insulation type and thickness against the design
specification.
• To minimize potential heating cable damage, insulate as
soon as possible after tracing.
• Check that all pipework, including fittings, wall penetrations
and other areas, have been completely insulated.
• Ensure that heating cable is not damaged during installation
of cladding for example by drills, self tapping screws and
sharp edges of cladding.
• Check that all insulation entry kits are fitted correctly
and sealed.
• Ensure that all places where valve stems, support brackets,
thermostat capillaries, etc exit the cladding are sealed.