Thermon Caloritech SS Instructions D'installation Et D'entretien

Strip Heaters
Types SS, SD, & FS
Installation & Maintenance Instructions
1. Installation
1.1 Strip heaters are designed to be mounted to surfaces
to be heated such as platens, dies and sealing heads
or in air streams or batch ovens for air heating.
1.2 Strip heaters are available with or without fins and in
different sheath materials and watt densities.
1.3 Check with the factory to be sure the selected heater
is suitable for the application.
1.4 Strip heaters will expand when heated. Be sure the
mounting method does not restrict this expansion.
1.5 Heaters are supplied with elongated mounting holes
to allow for expansion. SA1044 clamps are available to
aid in mounting to broad surfaces.
1.6 Strip heaters are not moisture resistant or sealed.
Care should be taken to protect heaters from
contaminants.
1.7 SA1014 and SA1024 bushings are available to aid in
mounting. These bushings MUST be used if voltage to
ground exceeds 277 volts.
1.8 Strip heaters are capable of reaching very high surface
temperatures, select connection wires suitable for the
application.
2. Wiring & Control
2.1 Heaters must be wired by qualified personnel to
electrical code requirements.
2.2 Check supply voltage for compliance with heater
nameplate voltage.
2.3 Ensure that suitable wire and connectors are used.
Good tight low resistance connections are essential
for good heater life.
2.4 All heating systems should include suitable
thermostatic control and safety limits. Check code
requirements and the factory for available devices.
2.5 SA1054 terminal box is available to aid in protecting
live electrical terminals.
2.6 Field electrical connections
2.6.1 The bottom nuts of the electrical connections
are factory torqued to a maximum of 10 in.-lbs.
2.6.2 When making field electrical connections
ensure that the terminal stud is not allowed to
rotate.
2.6.3 Failure to restrain the bottom nut to prevent
the terminal stud from rotating when
tightening the top nut, may damage the mica
washer, the terminal stud to resistance coil
connection or the insulating material around
the coil to stud connection.
2.6.4 Recommended torque for tigntening the top
nut is 15 in.-lbs. minimum and 20 to 25 in.-lbs.
maximum.
2.6.5 If it is necessary to tighten the top nut without
restraining the bottom nut, it is suggested
that a torque of 10 in.-lbs. not be exceeded.
3. Start-up Inspection
3.1 Check that all terminal connections are tight.
3.2 Heaters stored for prolonged periods may absorb
moisture. Using a megger (insulation resistance
tester) check the value of the insulation to ground
for each circuit. Initial readings of over 500,000 ohms
to ground are normally acceptable. Should lower
readings be observed, check factory for instructions.
4. Maintenance
4.1 DISCONNECT POWER BEFORE SERVICING.
4.2 Periodically check the condition of wiring especially
at terminal junctions and check all electrical
connections for tightness.
Part No. MI161.Rev.8.02
ISO 9001
November 2023 Printed in Canada