ASHRAE-90.1-2022- - Page 198
Extracted Content
The FDD system requirements of items (a) through (e) shall be allowed to be incorporated into a building management system (BMS) or building automation system (BAS). Where credit is also taken for H07, all of the applicable automatic fault detection and diagnostics (AFDD) specified in Guideline 36 shall be included in FDD reporting and all necessary AFDD sensors recommended by Guideline 36 for applicable HVAC sys- tems shall be installed.
Informative Note: FDD is in addition to standard BAS/BMS monitoring and alarming functionality. Faults identified may also include failing or failed system components, poor air or fluid flow, inoperable valves and dampers, sensors and devices out of calibration, undermaintained equipment and filters, failing or failed bearings, or unresponsive actuators and devices.
11.5.2.8 Load Management Systems. Energy credits for load management measures in Sections 11.5.2.8.1 through 11.5.2.8.7 are available in any combination to projects in buildings that have at least one of the following:
a. A serving electric utility that has any of these programs available:
- A demand response program
- Real-time or next-day pricing
- A time-of-use price schedule applicable to the building b. Local building -level electrical demand monitoring and control integrated into the building control system c. Buildings or additions that have ≤25,000 ft [2] of gross floor area with a central group time control sched ule for lighting or HVAC set points
Where credits are taken for measures in Section 11.5.2.8, the following additional requirements shall apply:
a. Where the serving utility has an interface requirement for participation in items (a)(1) through (a)(3)
above, an interface compliant with serving utility requirements shall be installed. b. The building shall have a building automation control system configured with automatic load manage ment controls that are activated by either a utility demand response signal, real-time or next-day peakprice-period notifications, or local building peak electrical demand monitoring. Buildings or additions that have ≤25,000 ft [2] of gross floor area shall be permitted to use a centralized group time control schedule for load management control. c. Load management control sequences shall be implemented so that they are activated in response to either
an automated serving utility signal; local building peak electrical demand monitoring; or, where buildings or additions have ≤25,000 ft [2] of gross floor area, on a schedule where peak-price-period dates and times shall be adjustable without reprogramming.
11.5.2.8.1 G01: Lighting Load Management. To achieve this credit, luminaires shall have dimming capability, and load management controls shall gradually, over a period of not more than 15 minutes, reduce general lighting power with continuous dimming in 75% of the project area by at least 20% during peakprice periods coincident with high building load. It shall be permitted to substitute decorative and displaylighting equivalent power reductions for general lighting reductions. Where less than 75% but at least 50% of the project general lighting is controlled, the base credits from the tables in Section 11.5.3 shall be prorated as follows:
Portion of project with lighting load management, %
------------------------------------------------------------------------------------------------------------------------------ G01 table credits 75%
Exception to 11.5.2.8.1: Warehouse, semiheated, or retail storage areas with load management con trols shall be permitted to switch off at least 25% of lighting power in 75% of the project area without dimming.
11.5.2.8.2 G02: HVAC Load Management. To achieve this credit, load management controls shall be configured to
a. gradually increase cooling set point by at least 3 F or reduce effective cooling capacity to 60% of
installed capacity during the period of coincident high building load and summer peak prices; b. where electric heating is used, gradually reduce heating set point by at least 3 F or reduce effective heat ing capacity to 60% of installed capacity during the period of coincident high building load and winter peak prices; and c. provide excess outdoor air preceding the peak summer price period and reduce outdoor air by at least
30% during the period of coincident high building load and summer peak prices, in accordance with ASHRAE Standard 62.1, Section 6.2.5.2.
196 ANSI/ASHRAE/IES Standard 90.1-2022 (I-P)