Publicité
Les langues disponibles
Les langues disponibles
D.
OPERATION
RISK OF EXPLOSION
voltages higher than the rating specified on the nameplate.
CAUTION
Failure to do this will cause elevated temperatures.
WARNING
For metal sheathed heaters, prior to
operation an insulation resistance check must be
WARNING
performed. Heater with values less than 0.5 M
follow a drying process. Please contact factory for
details on procedure if heater is under 0.5 M
FIRE HAZARD
the fluid for proper operation and to avoid element
WARNING
overheating that could result in fire or damage of
the heater.
WARNING
When operating the heaters in a closed
system or vessel, system designers must ensure that
WARNING
proper controls are used to maintain the temperature
and pressure at normal levels.
E.
MAINTENANCE
WARNING
Disconnect all power before servicing
the heater or heated equipment. Failure to do so could
WARNING
result in personal injury and/or property damage.
All maintenance and installation should be done by
qualified personnel in compliance with local codes.
1.
Heaters stored for prolonged periods may absorb moisture.
Using a 500V DC megger (insulation resistance tester) check
the value of the insulation resistance 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.
2.
Periodically check electrical connections for tightness and
check wire insulation for any damage and replace if necessary.
3.
Remove the immersion heater periodically to inspect for
corrosion, sludge build-up and for scale removal. Do not
continue to use a heater showing visible signs of damage.
4 4
Do not operate heater at
Ω
should
Ω.
Heater should be submersed in
WARNING
Low megohm on heating elements with
epoxy or hermetic seals cannot be serviced in the field.
WARNING
Typical resistance values when sealed are
Ω
1000 M
or greater.
1.
Check that all connections are tight.
2.
If a thermostat is provided, verify that it is operating properly by
cycling it and verifying cutout.
3.
Perform an IR test prior to energization and verify that levels
are acceptable 500,000 ohms.
4.
Energize the heater and check for signs of hotspots in the
electrical connections or vessel.
5.
Retorque all bolted fitting connections and all electrical
connections after 10 cycles.
6.
Always maintain a minimum of 51 mm (2") of liquid above the
heated portion of the element or element failure may result.
7.
Heating elements should be kept above sediment deposits or
it may overheat and shorten life expectancy.
Publicité
