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Rev. E 2-7-01
SERVICE (SERVICE)
The service light is off during normal operation ofheater. The light only comes on if a problem with acontrol has occurred or when the heater is firstfiring. The problem must be investigated by theserviceman prior to attempts to fire the heater again.
TROUBLESHOOTING (CONTROLS)Example of troubleshooting with the assistance of the indicator lights.
Operation (contd.)HEAT (HEAT)
The diagrams that follow give examples of
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P/N 471048
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