Commercial Modbus Integration in Pasadena — AC PRO‑Compatible HVAC Solutions

What We Integrate

We connect and standardize diverse HVAC assets into a single, intelligible Modbus ecosystem—ideal for AC PRO–supplied equipment and mixed fleets across Pasadena. Typical points of integration include rooftop units (RTUs), VRF/VRV systems, air handlers, make‑up air units, boilers, chillers, pumps, VFDs, ERV/DOAS units, IAQ sensors (CO2, VOC, PM2.5), smart thermostats, and energy meters. Whether you need Modbus‑to‑Modbus coordination or translation to BACnet/IP for your BMS, we design a reliable path.

• Modbus RTU over RS‑485 with correct topology, termination, and biasing
• Modbus TCP/IP with proper VLANs, IP addressing, and segmentation
• Gateway configuration and point mapping to BACnet/IP or BACnet MS/TP
• Custom alarming, trend logs, schedules, and graphics
• Load shedding, ventilation optimization, and IAQ control strategies

Our Proven Process

We approach every commercial project with engineering rigor and a field‑tested commissioning plan.

• Discovery and Scoping: Asset inventory, network survey (RS‑485/IP), and point list definition.
• Design and Submittals: Network diagrams, panel layouts, controller bill of materials, and sequence of operations.
• Implementation: Clean control wiring, shield/drain management, labeling, and gateway programming.
• Commissioning: Node addressing, register validation, trend checks, alarm verification, and functional performance tests.
• Handover: As‑builts, point lists, credentials, and owner training for your facilities team.

Technical Capabilities You Can Count On

Our engineers combine 80+ years of engineering experience with factory training at Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China). That background helps us solve tough interoperability challenges while keeping systems maintainable for years to come.

• Register mapping: coils, discrete inputs, holding/input registers with scaling and units
• Network best practices: stub minimization, daisy chain integrity, baud/parity selection
• Cyber‑aware designs: password policies, role‑based access, segmented controls networks
• California standards: Title 24 sequences, ASHRAE 90.1 energy, ASHRAE 62.1 ventilation
• Serviceability: structured naming, consistent tagging, and clear documentation

AC PRO and Your Equipment

We frequently integrate AC PRO–supplied HVAC equipment into Modbus and mixed‑protocol sites. Our role is to make your equipment communicate clearly and reliably with your building automation system—without vendor lock‑in. From field‑mounted gateways to controller upgrades, we ensure you get complete, validated point access for monitoring, control, energy, and IAQ.

Industries and Project Types

We specialize in large and complex commercial jobs across Pasadena and greater Los Angeles County, along with Orange County, Ventura County, and Western Riverside County.

• Class A offices and corporate campuses
• Retail centers and mixed‑use properties
• Healthcare clinics and labs
• Schools, higher education, and municipal buildings
• Hospitality, venues, and entertainment
• Light industrial and distribution

Healthy Air, Lower Energy

Our mission is healthy air for a healthy life. With proper Modbus integration, ventilation and filtration strategies work in harmony with demand control and equipment staging. The result: better IAQ, stable comfort, and reduced energy spend. Trend logs surface issues early, alarms shorten downtime, and standardized naming accelerates service.

Service Area and Response

Based in Los Angeles County, we serve Pasadena daily and cover nearby regions including Orange County, Ventura County, and Western Riverside County. Expect responsive scheduling, clear communication, and coordinated work with your GC, facility team, and IT.

Why #1 AC Guys

• Fourth‑generation family of engineers with 80+ years in engineering
• Factory‑trained at Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China)
• Commercial focus with a track record on large, complex sites
• Clean, code‑aligned designs tailored to Pasadena buildings
• Documentation, training, and support that reduce lifetime cost

Whether you are modernizing legacy RTU controls, unifying VRF boxes, or bringing AC PRO–supplied equipment into your BMS, we can help. We map what matters, secure what’s critical, and hand you a system that your team can own.

Get a Pasadena Modbus Integration Quote

Tell us about your site, equipment list, and BMS platform. We will deliver a clear scope, firm pricing options, and a realistic schedule. #1 AC Guys is ready to engineer, integrate, and commission your Commercial Modbus solution in Pasadena—and keep your building breathing clean, efficient air.