Installation Guide

38 | nVent.com/RAYCHEM
Note:
Locate faults by the following steps:
1 Visuallyinspectthepowerconnections,splicesandendsealsfor
correct installation.
2 Lookforsignsofdamageat:
a)Valves,pumps,angesandsupports.
b) Areas where repairs or maintenance work has been carried out.
3 Lookforcrushedordamagedinsulationandcladdingalongthepipe.
C Symptom: No power output.
Probable Causes
1 Loss of supply voltage due to:
a overcurrent or residual current protection operating
b loose terminals in junction box
c loss of supply cable continuity (e.g., open circuited
from damage
2 Control thermostat is connected in the normally
open position
3 High resistance connection at:
a junction box terminals
b splices and tees
D Symptom: Low pipe temperature.
Probable Causes
1 Wet thermal insulation
2 Design error
3 Incorrect setting or operation of controls e.g.,
thermostats.
4 Heating cable has been exposed to excessive
temperature beyond rating.