Bleuwave Controls

Commercial HVAC Controls

Commercial HVAC Controls

From sensor to sequence to supervisor — Bleuwave Controls coordinates field devices, control logic, equipment interfaces, network integration, graphics, startup and commissioning.
  • RTU
  • AHU
  • VAV
  • DOAS
  • Chillers
  • Boilers
  • VRF
  • VFDs
  • Hydronic
Request Controls PricingRequest Service

Our approach

Controls applied to real equipment — not a separate IT layer

A lot of controls work goes wrong because the logic was written by someone who never looked at the equipment it commands. A reset schedule that ignores coil capacity, an economizer sequence that fights the mechanical cooling, a VAV box that has been in reheat since the day it was commissioned — these are not programming bugs. They are mechanical misunderstandings expressed in software.

We approach HVAC controls from the equipment side first. What is the system supposed to do, what limits does it actually have, what safeties must never be defeated, and how will someone prove it is working six months from now. The sequence follows from that.

Commercial HVAC controls technician working in Phoenix
Commercial HVAC sequences are tested against real equipment and Arizona operating conditions.
Controls technician commissioning building automation equipment in a mechanical room
Commercial facility operator reviewing building automation performance

Equipment & sequences

What we control

Applied to the equipment already in your building, or specified as part of a new system.
  • RTU control and economizer sequences
  • AHU and mixed-air control
  • VAV terminal control, including reheat and minimum airflow
  • DOAS control for temperature, humidity and ventilation
  • Chiller and boiler plant control and staging
  • Hydronic pump and differential-pressure control
  • VRF integration where a supported interface exists
  • VFD control, speed limits and optimization
  • Exhaust and make-up air interlocks
  • Humidity, pressure, temperature, CO₂ and IAQ control
  • Occupancy detection and scheduling strategies
  • Freeze protection, safeties, alarms and proof-of-operation

Sequence work

The parts of a sequence that decide whether it works

Most of the value in HVAC controls is in details that never appear on a schematic.

Setpoints & resets

Supply-air, static-pressure, hot-water and chilled-water resets tuned to the equipment and the load, with limits that prevent the reset from chasing a single problem zone.

Safeties & interlocks

Freezestats, high-static cutouts, smoke-detector interlocks and equipment proof handled as hard safeties, never as software conveniences.

Occupancy & scheduling

Occupied, unoccupied, warm-up and after-hours modes that match how the building is genuinely used, including tenant override behaviour.

Staging & rotation

Plant and fan staging with minimum runtimes, lead-lag rotation and anti-short-cycle protection, so the equipment lasts as long as it should.

Alarming

A short list of alarms that mean something, with priorities and delays that stop the nuisance flood everyone eventually learns to ignore.

Trending

Point selection and intervals chosen so that when something goes wrong, the data needed to diagnose it already exists.

Symptoms

What owners usually describe when they call

What you’re seeing

One area is always too hot or too cold, and nobody can find why.

How we approach it

We trend the zone, the terminal unit and the air handler together. Most of these resolve to a stuck damper, a failed sensor, a minimum airflow set too high, or a reset that starves the zone.

What you’re seeing

Equipment runs overnight and on weekends when the building is empty.

How we approach it

We audit schedules, holiday calendars, override timers and any points left in manual. After-hours runtime is usually the fastest measurable win in a building.

What you’re seeing

The economizer never seems to open, or opens at the wrong time.

How we approach it

We verify the outdoor-air sensor, changeover strategy and damper linkage, then re-test the sequence across the actual operating range instead of trusting the setpoint.

What you’re seeing

Alarms come in constantly, so the staff stopped reading them.

How we approach it

We rebuild the alarm strategy — priorities, delays, deadbands and routing — so that an alarm means action is required.

What you’re seeing

Points show values that clearly are not real.

How we approach it

Sensor calibration and reasonableness checks across the affected system, then correction of any scaling or I/O mapping errors in the database.

What you’re seeing

The chiller or boiler plant short-cycles.

How we approach it

We review staging thresholds, minimum runtimes, flow proof and the reset strategy driving the load, then re-stage the plant around real conditions.

Questions

Frequently asked questions

Almost always, and that is most of what we do. Controls retrofits on existing RTUs, air handlers, VAV boxes and plants are a large share of our work. The equipment does not need to be new for the controls to be worth fixing — in many buildings, correcting the sequence and the schedule gets more improvement per dollar than replacing a functioning unit.

It is normal. Very few commercial buildings have a single-vendor mechanical plant. What matters is what each piece of equipment exposes — a BACnet interface, a Modbus register map, or just hardwired points. We document what is available on each unit and design the control approach around that, using gateways where a direct interface does not exist.

A thermostat controls one thing from one measurement. DDC — direct digital control — is a programmable controller that can take several inputs, run a written sequence, log data, raise alarms, and coordinate with other equipment over a network. In commercial buildings the practical difference is that DDC lets you see what happened, prove why, and change behaviour without sending someone to a wall.

Both. If a design engineer has issued a sequence, we implement it and flag anything that will not work as written before it gets programmed. If there is no sequence — common on retrofits and older buildings — we write one, review it with you, and use the approved version as the basis for programming and functional testing.

Point-to-point checkout first: every input reads correctly and every output commands the device it is supposed to. Then functional testing of the sequence across its operating modes, with the results recorded. Then a trend review over a period long enough to catch behaviour that only appears under real load. Deficiencies get logged, corrected and re-tested before turnover.

Related capabilities

Next step

Need HVAC controls pricing or a second opinion on a sequence?

Tell us what equipment is involved and what the building is doing wrong. Share any drawings, schedules, screenshots or trend exports you have — we will tell you what we would check first.
Request Controls PricingRequest Service
CallServiceGet Quote