Division 25 Integrated Automation

Detail or Installation Mismatch in Division 25 Integrated Automation submittals

By Deviation Check Editorial Team. Last reviewed June 1, 2026.

Short answer

The submitted detail, dimension, anchorage, or installation method differs from what the spec or drawings require. Default grade in Division 25 Integrated Automation: Fix and Resubmit.

The submitted detail, dimension, anchorage, or installation method differs from what the spec or drawings require. This guide covers how it shows up specifically in Division 25 Integrated Automation submittals.

What to look for in Division 25 Integrated Automation

  • Wiring topology different from spec (daisy-chain vs. home-run for MS/TP trunks)
  • Network segment length exceeding BACnet MS/TP or LonWorks cable distance limits
  • Controller panel layout differing from approved shop drawings
  • Cable type mismatch (shielded twisted pair vs. unshielded, Cat 5e vs. Cat 6 for IP networks)
  • IP addressing scheme or subnet allocation not matching the network design
  • Power supply sizing for controllers and field devices differs from load calculations
  • Sensor placement locations not matching the mechanical drawings or sequences of operation
  • Integration wiring (hardwired interlock vs. software integration) differs from the specified method
  • Surge protection or network isolation devices omitted at building entry points
  • End-of-line termination missing or incorrect on MS/TP or LonWorks segments
  • Outdoor sensor enclosure rating lower than specified NEMA rating for the location

How severe is it?

Default grade: Fix and Resubmit. Escalates to Blocker when the difference affects a fire-rated, seismic, or structural assembly.

Deviation Check assigns a default per category and escalates or de-escalates based on the spec, always showing its reasoning. See the Division 25 severity rules.

What the PM should do

Stamp the submittal Revise and Resubmit. Mark the deviation, return the relevant spec passage as a redline, and have the sub correct and re-send before fabrication or installation.

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Frequently asked questions

What wiring and network details are most often flagged as installation mismatches in Division 25 Integrated Automation submittals?

Daisy-chain versus home-run wiring topology on MS/TP trunks is a common flag, as is network segment length exceeding BACnet MS/TP or LonWorks cable distance limits. Cable type mismatches - shielded twisted pair versus unshielded, or Cat 5e versus Cat 6 for IP networks - are also frequent. Missing end-of-line termination on MS/TP or LonWorks segments and omitted surge protection at building entry points are installation gaps that appear here.

How do sensor placement and integration wiring details create installation mismatches in Division 25 Integrated Automation submittals?

Sensor placement must match the mechanical drawings and the sequences of operation - a sensor at the wrong location produces incorrect control data. Integration wiring method matters too: hardwired interlock versus software integration is specified, and submitting the wrong method is a mismatch. Power supply sizing for controllers and field devices is checked against load calculations. Outdoor sensor enclosure ratings below the specified NEMA rating for the location also fall here.

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