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Commissioning the System

This guide covers essential practices for commissioning HVAC systems, utilizing Service Form 1A and verifying proof of performance. It details methods to enhance technical support efficiency and reduce recall rates through effective balancing of orifices and airflow checks using U-tube or slope gauges. The document outlines Delta T checks in cooling and electric heat, motor amperage impacts on fan performance, and methods for converting KW to BTU. Additionally, it addresses winterization procedures, including sealing returns and shutting off condensate supplies.

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Commissioning the System

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  1. Commissioning the System

  2. Commissioning • Use Service form 1A • Proof of performance • Speeds up Tech support • Reduces recalls

  3. Balancing Orifices • Works with all plenums • 15, 35, 50% • Easy to re-balance system

  4. Airflow Checks • U tube or Slope Gauge – best way • Delta T in cooling 25-28 deg. • Electric Heat Delta T check • Motor Amperage

  5. Static Pressure Affects on Fan Performance

  6. Electric Heat Airflow • Convert KW to BTU (3413 X KW = BTU) • DeRate for 208 (.8) • Cfm’s x1.08 x’s Temp. Diff. = BTU • Compare to unit data

  7. Winterizing Cooling Only Units • Winter supply shut-offs • Seal the return • Winterize condensate • Shut off breaker

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