Process Air Compressors, Boilers, and Water Heaters #1
Process Air Compressors, Boilers, and Water Heaters #1
Process Air Compressors, Boilers, and Water Heaters #1
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CALIFORNIA STATEWIDE UTILITIES CODES AND STANDARDS PROGRAM<br />
Chilled <strong>and</strong> Hot <strong>Water</strong> Temperature Reset Controls<br />
Current Code Requirements <strong>and</strong> Proposed<br />
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144(j)1: “HVAC chilled <strong>and</strong> hot water pumping shall be designed for<br />
variable fluid flow…”<br />
“Chilled <strong>and</strong> Hot <strong>Water</strong> Temperature Reset Controls. Chilled <strong>and</strong><br />
hot water systems with a design capacity exceeding 500,000 Btu/hr<br />
supplying chilled or heated water (or both) shall include controls that<br />
automatically reset supply water temperatures as a function of<br />
representative building loads or outside air temperature.<br />
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EXCEPTION to Section 144(j)4: Hydronic Chilled water systems<br />
that use variable flow speed drives to reduce pumping energy in<br />
accordance with Section 144(j)1 144(j)6.”<br />
144(j)6: CHW pumps over 5HP shall have VFDs…the pressure shall<br />
be reset by valve position.<br />
CA 2011 Utilities Title 24 2011 CASE Title <strong>Process</strong> 24 Stakeholder Update Meeting for Proposed Code Changes<br />
May 25, 2010
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