OPERATING INSTRUCTIONS
11/26/2019
10
Troubleshooting and Replacing Heaters
1.
Note that “TYPICAL” Element Life is
APPROXIMATELY
5000 hours. This is based on heater element
operating at or below temperatures shown on PERFORMANCE CURVE(S). In addition to normal end of
life, elements can fail due to mechanical damage, or problems with the control system.
2. If an element has failed prematurely, it should be inspected to determine the cause of the element failure.
3. When replacing or troubleshooting heaters, turn off power to the system and be sure to follow lock-out/tag-
out procedures.
a.
For Troubleshooting Heater
i.)
Use multi-meter to check continuity between:
1.
Power terminals H1-H2, H2-H3, and H1-H3
2.
Thermocouples positive (+ yellow) to negative (- red)
ii.)
If there is continuity on all above tests, check system wiring:
1.
Crossed thermocouple wires.
2.
Reversed thermocouple wire polarity
– Note: RED is NEGATIVE ( - ).
3.
Verify inlet air temperature is below set point on INLET TEMPERATURE controller.
iii.)
If there is no continuity on any test, then contact your local TUTCO SureHeat representative for
assistance.
4.
Remove entire heater assembly from system. Internal components are typically not replaceable.
5.
Reconnect thermocouples, power and ground wires for new/replacement heater.
6.
Attach any covers and operate heater per operating manual.
