Trane Dedicated Outdoor Air Systems User Manuals

Table of Contents

• Preface

  3
• Table of Contents

  4
• Defining the Dehumidification Challenge

  5
• Dedicated OA System Configurations

  6
  • Comparison of different dedicated OA system configurations

    7
  • Cold or Neutral Air?

    9
• Designing a Dedicated OA System

  12
  • Selecting the Dedicated OA Unit

    12
    • Step 1: Determine the entering-air condition.

      12
    • Step 2: Choose the maximum limit for space humidity.

      13
    • Step 3: Determine the latent loads in the space.

      14
    • Step 4: Determine the total airflow that the dedicated outdoor air unit must deliver.

      15
    • Step 5: Determine which zone requires the driest conditioned outdoor air.

      15
    • Step 6: Determine the required dew point for the conditioned outdoor air.

      16
    • Step 7: Determine the supply-air dry-bulb temperature for the dedicated outdoor air handler.

      16
    • Dehumidification mode

      18
    • Sensible cooling mode

      18
    • Sensible heating mode

      19
    • Ventilation only mode

      19
• Control of the Dedicated OA Unit

  17
  • Dehumidification mode

    18
  • Sensible cooling mode

    18
  • Sensible heating mode

    19
  • Ventilation only mode

    19
• References

  20