Chromalox SRL User Manual

31
Table 26 – Troubleshooting Guide
Observed Problem Potential Causes Corrective Actions
Pipe temperature is too
low
Incorrect installation of thermostat/ther-
mocouple
Reinstall thermostat on an appropriate pipe seg-
ment. Ensure thermocouple is fully contacting the
pipe.
Damaged, missing, or wet insulation
Remove damaged or wet insulation and install
new, dry insulation. Ensure new insulation is
weatherproofed.
Improper installation of heating cable on
heat sinks
Additional heating cable can be added, as long
as the proper connection kits are used, and the
new heating cable length does not exceed the
maximum circuit length.
Error in thermal design
Contact a Chromalox representative and modify
design as needed.
Incorrect voltage applied
Apply voltage as specied. Check/repair electrical
supply lines.
Power output is too low
Damaged heating cable
Replace damaged cable. Check pipe temperature
and cable power output.
Incorrect circuit length due to uninstalled
connections (splice/tee) or severed heat-
ing cable
Ensure length and heat trace path matches draw-
ings.
High-resistant connection due to improp-
er installation of connection kits
Connect all splices and tees as per design speci-
cations.
Thermostat is wired in “Normally Open”
position
Rewire to “Normally Closed” position
The pipe temperature is too high
Lower pipe temperature if possible. Ensure
correct heater selection and design. Contact a
Chromalox representative and modify design if
pipe temperature cannot be reduced.
Incorrect voltage applied
Apply voltage as specied. Check/repair electrical
supply lines.
Insulation resistance is low
or inconsistent
Damaged heating cable
Replace damaged cable using the proper splice
connection kits.
Shorted circuit
Ensure all connection kits are installed properly
and inspect them for damage. Replace if neces-
sary.
For uninsulated heating cable: Check the heating
cable for damage, especially around heat sinks.
Replace damaged cable using the proper con-
nection kits.
For insulated heating cable: Check the heating
cable for damage piecewise at each connection
kit to determine the damaged segment.
The Locating Faults section on page 30 can be
used to estimate fault location.
Moisture
Excessive moisture on heating cable core or bus
wires: Replace cable.
Moisture on connection kits: Retest after drying
out all components. Ensure all conduit entries are
properly sealed during reinstallation.
Pipe temperature is too high Retest at ambient conditions
Test leads are in contact with junction box Retest after moving test leads
Troubleshooting

Chromalox SRL Specifications

General

Brand	Chromalox
Model	SRL
Category	Cables and connectors
Language	English