Raychem EM4-CW Installations- Und Betriebshandbuch Seite 16

Embedding Works - Concrete Pouring
Checks
Perform the following checks before the
embedding works:
• check for signs of heating cable
damage
• check the cable spacing
• check the height of the heating cable
Resistance tests
Perform the resistance tests on each
heating cable circuit to detect any
damage which may have occurred after
installation.
Record the results on the Installation Test
Record.
When the concrete team arrives, have
them verify the resistance results and
sign the Installation Test Record.
Warning:
Precautions should be taken during
the concrete pour to prevent the
heating cable from being exposed to
unnecessary abuse:
• Avoid excessive concrete drop
heights.
• Take care when using shovels
and rakes during the pour.
16
During the embedding
Monitor the insulation resistance
continuously during the pour.
If the insulation resistance drops below
100 MΩ the heating cable may be
damaged. Stop the pour immediately.
Locate the damage and repair it.
After the embedding
After completion of all concrete works,
perform the resistance tests and record
the values on the Installation Test Record.
Supplementary work
Work such as drain installation,
p lacement of anchor bolts and cutting of
expansion joints is done after the initial
concrete pour. Consult the drawing of
the layout so that damage to the heating
cable is avoided.
It is desirable to monitor the heating
cable by insulation resistance testing
during any activity which could lead to
heating cable damage.
After all such work has been completed
perform the resistance tests and record
the results on the Installation Test
Record.