Thermon KSR - Manual (Page 4)

INSTALLATION PROCEDURES
• Immediately stop the pour and find the damaged section.
• Repair the damaged section with a KSR-SK Splice Kit.
• Failure to repair a damaged heating cable section during
the pour may result in the entire snow melt circuit becom-
ing inoperative.
• Once the damaged section is repaired, megger the cable
again and record the results. If the reading exceeds 20
megohms, proceed with the pour. If the reading is below
20 megohms, look for another damaged section.
• Failure to follow cable test instructions and record test
readings may void system warranty.
1. While pouring and finishing the concrete, the snow
melting cable should be monitored for resistance between
the ground and bus wires (should read 20 megohms or
higher) throughout installation. (Record 3 on Cable Testing
Report.)
1. Locate the snow sensor in a physically secure area rep-
resentative of the environmental conditions to which the
desired snow free area is to be exposed. Power the snow
sensor control panel from a main distribution panel having
a breaker(s) sized at a minimum of 20% over the maximum
current draw specified. Breakers shall be of the 30 mA
ground fault interrupting type. Reference Thermon Snow
Sensor installation instructions for details.
Installation of Concrete . . .
The snow melt cable should not be energized for a minimum
of 7 days after installation to ensure adequate slab cure.
Installing the Controls . . .
IMPORTANT: During the pour, care should be taken to
minimize the chance of cutting or damaging the heating cable,
causing short circuits.
If the resistance test reading suddenly decreases,
the heating cable has been damaged!!!
NO SHARP EDGED
SHOVELS!
SLAB
2. Once power is connected but before putting the system
into operation, verify all heating cable testing and docu-
mentation have been completed for each heat tracing
circuit. This will ensure that the system has been installed
per the manufacturers recommendations. (Record 4 on
Cable Testing Report.)
The National Electric Code and Canadian
Electrical Code require ground-fault protection
be provided for branch circuits supplying electric
heat tracing on fixed outdoor electric de-icing
and snow-melting equipment.
3. Once the installation is complete, recheck the heating
cable with at least a 500 Vdc megohmmeter (megger)
between the heating cable bus wires and the heating
cable metallic braid. IEEE 515.1 recommends that the test
voltage for polymer insulated heating cables be 2500 Vdc.
Minimum resistance should be 20 megohms. (Record 2 on
Cable Testing Report.)
4. Install appropriate grounding wires as shown and connect
incoming power and ground wires to snow melting cable
and ground system.
3
To Main
Distribution
Panel
Snow Sensor