High-Performance Sequences of Operation for HVAC Systems

Abstract

Changes in this addendum are as follows:

a.

Update description of the minimum heating airflow set point Vheat-min for consistency among variables (Section 3.2.2.5).

b.

Revise damper control paragraph under Time-Averaged Ventilation (Section 5.2.2).

c.

Add missing reference to Vheat-min (Section 5.6.3).

d.

Add missing damper control sequence to VAV Terminal Units with Reheat (Section 5.6.6).

This addendum addresses these issues:

a.

The description of the minimum heating airflow set point, Vheat-min for VAV Terminal Units with Reheat, is inconsistent among other similar variables such as Vheat-max.

The description has been updated for consistency.

b.

The damper control paragraph under Time-Averaged Ventilation (Section 5.2.2) is in an inappropriate section.

This paragraph has been revised to indicate the change in airflow set point during TAV Mode and the damper control paragraph has been added to the VAV Terminal Units with Reheat (Section 5.6.6) for consistency with other VAV Terminal Unit sequences.

c.

The variable Vheat-min is not referenced under Section 5.6.3.

Note: In this addendum, changes to the current standard are indicated in the text by underlining (for additions) and (for deletions) unless the instructions specifically mention some other means of indicating the changes