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When diagnosing a failed induction or blower motor
It requires a 120V power supply and is not compatible with standard 24V residential thermostats without a transformer or relay
providing the necessary negative pressure to pull gases through the burner tubes safely
it should typically show continuity (closed) during normal standby if it is a vacuum-style safety
IO Hvac Controls ESP-400 Control Panel 321894-706 When diagnosing a failed inductionThe iO HVAC Controls ESP 400 is an advanced static pressure control module designed to modernize residential and light commercial zoning systems. This 4 zone ESP panel utilizes a proprietary algorithm and a high precision ZPA SPS static pressure sensor to maintain ideal duct pressure without the complexity of a bypass damper. By continuously monitoring the discharge air plenum, the ESP 400 detects when static pressure exceeds the user defined setpoint