for the secondary pumps, if the pumps are 7.5 HP and larger.
For smaller secondary pumps, the capacity reduction of the
chillers shall be affected without the use of the variable
speed drives for the secondary pumps.
2. Miscellaneous Controls:
a. Load Reduction: For the peak demand shaving, consideration
shall be given to unloading the chillers through the ECC
included in peak demand shaving schedule.
b. Chilled Water Reset: The chilled water leaving temperature can
be changed in response to the outdoor temperature on a reset
schedule and this control can be used with or without the flow
control for the chiller operation.
5.3 DIRECT EXPANSION SYSTEMS
Depending upon the configuration of the building, and available
space, the following arrangements shall be evaluated:
A. ROOF TOP UNITS: Penthouse type of fully weatherized roof top package
units in modular sections and complete with air and refrigeration
B. REMOTE UNITS: Conventional horizontal, or vertical, draw-thru indoor,
DX air handling units with remote, air cooled, or water cooled,
5.4 CHILLED WATER SYSTEM
See Supplement, Attachment No. 2.
5.5 SECONDARY DISTRIBUTION
See Supplement, Attachment No. 1.
5.6 TERTIARY DISTRIBUTION
See Supplement, Attachment No. 4.
6. ENERGY CONSERVATION
The project design including mechanical systems shall use the
provisions outlined in this document, and criteria from other
technical disciplines, to meet the requirements of the DOE
regulations 10-CFR Part 435 Energy Conservation Voluntary Performance
Standards for Commercial and Multi-Family High rise Residential
Buildings; Mandatory for new Federal Buildings. To demonstrate
compliance with the "DOE Interim Standards", should it become
necessary to change any requirement outlined in the VA HVAC Design