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Section 7 Maintenance
7.1 Operator Maintenance
The 920 series controller is designed to be a maintenance-free product. Once installed properly,
the only maintenance required is retightening of the terminal connections approximately one
week after installation and inspection periodically thereafter. Also, alarm pilot lamps (if installed)
and contactors may need periodic replacement.
Caution: Make sure that the power to the controller is
OFF when replacing the pilot lamps! Also,
be certain power to the controller is
OFF before attempting to test or service the heat tracing. Do
not rely on the controller as a disconnect device!
7.2 Replaceable Parts
There are no user-serviceable parts in the 920 series controller or accessories, except lamps in
optional alarm pilot lights. The unit is designed to be modular and easily changed out in the field.
Modules appearing inoperative should be returned to the nearest Tyco Thermal Controls Service
Center for service.
Warning: Tampering with the 920 components without approval from Tyco Thermal Controls
could result in the product’s warranty being void.
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