Controls & Building Automation
Most “broken” HVAC equipment is working exactly as it was told to. The instructions are the problem.
The Sequence of Operations Is the Real System
Every piece of commercial HVAC equipment runs according to a sequence of operations — a written description of what should happen at each condition. When a building runs hot, runs cold, or burns energy for no visible reason, the fault is frequently in that sequence, in a sensor feeding it bad data, or in someone’s well-meant override from three years ago that nobody documented.
A simultaneous heating-and-cooling condition, an economizer locked out on a mild day, a chiller that will not stage, a VAV box stuck at minimum — these look like equipment failures on a work order. They are control failures, and replacing hardware does not fix them.
Controls work is diagnostic work. It starts with reading the sequence, trending the points, and comparing what the system believes against what a calibrated instrument actually measures at the equipment.
Controls Services
Sequence of Operations Review
We read what the system is supposed to do, then verify what it actually does. Undocumented overrides and hand-off points are found here.
Sensor Calibration
A BAS is only as honest as its sensors. Space, duct, water, and outside-air sensors verified against calibrated instruments — drifted sensors quietly corrupt every decision downstream.
BACnet & Modbus Devices
Controller, field device, and network troubleshooting on open protocols, including devices from mixed vendors that no longer talk to each other.
Trend Logging & Analysis
Trends turn an intermittent complaint into a diagnosable pattern. We set up logging and read it, rather than chasing a symptom that only appears on Tuesdays.
Setpoint & Reset Strategy
Supply air reset, chilled/condenser water reset, static pressure reset, and economizer changeover — the cheapest efficiency work available in most buildings.
Alarm Rationalization
A front end throwing 400 nuisance alarms is a front end nobody reads. We prune, prioritize, and make the alarms mean something again.
What a Controls Review Typically Finds
Fighting Your Building Automation System?
A controls review usually pays for itself before the equipment ever gets touched.