Controls Upgrade
HVAC Controls Upgrades & Modernization by Nexklima Inc.
Outdated mechanical controls, leaking pneumatic air lines, and obsolete proprietary control systems waste thousands of dollars in energy each month. Nexklima Inc. modernizes aging commercial control infrastructure by converting legacy equipment into open-protocol Direct Digital Control (DDC) networks.
Upgrading your building controls gives you modern diagnostic visibility, resolves temperature oscillation issues, and prevents component lockouts.
Controls Modernization Services
Pneumatic-to-DDC Conversion
Mechanical pneumatic systems depend on air compressors, tubing, and mechanical diaphragms that degrade over time, leading to air leaks and poor control precision.
- Systematic removal or bypass of legacy air compressors, pneumatic lines, and bleed-type thermostats
- Installation of digital electronic sensors, microprocessors, and modulating electronic actuators
- Immediate elimination of calibration drift and compressed-air maintenance overhead
Controller Firmware & Sequence Optimization
Updating control hardware allows your facility to take advantage of modern, high-performance control sequences engineered for maximum energy reduction.
- ASHRAE Guideline 36 Sequences: Implementing standardized, high-efficiency control logic for VAV boxes, central air handlers, and chiller plants.
- Logic Rewriting & Refurbishment: Replacing buggy or hard-coded proprietary software routines with clean, adaptable open-source logic blocks.
- Field Controller Replacement: Upgrading failing or discontinued field devices with universal BACnet-compatible controllers.
System Calibration & Commissioning Audits
Even modern control systems experience sensor drift over years of continuous operation, skewing automated energy decisions.
- Comprehensive sensor audits and recalibration for temperature, relative humidity, and pressure transmitters
- Actuator stroke verification and damper seal inspections to eliminate thermal leakage
- Water flow meter and hydronic valve recalibration for balanced chilled and hot water delivery
Comparative Advantage: Pneumatic Controls vs. Modern DDC
| Capability | Legacy Pneumatic Controls | Modern Direct Digital Controls (DDC) |
|---|---|---|
| Control Accuracy | Low (Vulnerable to air leaks & drift) | High (Precision digital sensor feedback) |
| Remote Visibility | None (Physical inspection required) | Full (Real-time web dashboard & cloud connectivity) |
| Maintenance Need | High (Compressor oil, dryers, tubing) | Low (Solid-state digital electronics) |
| Energy Efficiency | Poor (Constant offset & manual tuning) | Optimized (Automated software algorithms) |
Frequently Asked Questions
Do I need to replace my entire HVAC system to upgrade the controls?
No. In most cases, existing mechanical equipment (boilers, chillers, air handlers) can be retrofitted with modern DDC controllers and actuators, dramatically improving efficiency without replacing major mechanical capital assets.