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If an unsealed nichrome-based heater has absorbed moisture, can I restart it safely?

April 26, 2017absorbed heater moisture safely unsealed

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If an unsealed nichrome-based heater has absorbed moisture, can I restart it safely?

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If a system shuts down for long periods, the heater can absorb moisture. With many power controllers, a full “on” can blow the heater or fuses. If a POWER SERIES controller is equipped with the heater diagnostics option, you can use the heater bake out feature to soft-start the heater and slowly drive out moisture. For details, see the “Phase Angle” section in Chapter 5 of the user’s manual.