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48
6
Commissioning and Preventive
Maintenance
Raychem-IM-H58067-IceStopRoofGutterDeIcingCOM-EN 18/01
6.1
System Start-up and Operation
Once the system has been installed and tested, it
is ready to be powered. A manually-controlled sys-
tem will have to be turned on at each snow storm
and turned off when the roof is cleared of all snow.
Thermostatically-controlled systems and dual-sens-
ing systems will turn on and off automatically.
Prior to System Start-Up
• Perform a final visual inspection of all circuits.
• Perform a final insulation resistance test of all
circuits.
• Instruct owner/user on system operation and
maintenance.
• Be sure that owner/user has all applicable instal-
lation instructions and operation manuals.
Indication of Operation
Some possible indicators of a properly operating
system are the following:
• The controller may indicate the circuit is powered.
• Visible paths may show through the snow around
the heating cable.
• Cable may feel warm to the touch.
• Water drainage may be visible at the gutter or
downspout.
6.2
Insulation Resistance (Megohmmeter) Test
The insulation resistance test is critical to ensure
the safety and reliability of the heating cable system.
This test should be performed as part of the instal-
lation of the system, and is useful for troubleshoot-
ing an installed system.
WARNING: Shock or Fire Hazard. Disconnect
power to all circuits prior to testing.