HVAC Zone Controller Expansion Module
Printed circuit assembly expanding input/output capacity of HVAC zone controllers under heading 8537, with temperature sensor interfaces and damper actuator drivers. It enables multi-zone climate control functionality. Under 8538.90.3000 as dedicated part for heading 8537 apparatus.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If parts of non-electrical heating/cooling machinery
Mechanical HVAC parts classify with the heating/cooling apparatus in heading 8419.
If for standalone programmable HVAC controllers
Complete self-contained controllers classify as finished heading 8537 apparatus.
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Import Tips & Compliance
• Provide BACnet/LON protocol specifications and compatible controller model lists
• Include sensor calibration data and wiring diagrams
• Ensure documentation excludes home automation protocols that might suggest residential classification
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