ASHRAE 145 2 ERTA-2016 Laboratory Test Method for Assessing the Performance of Gas-Phase Air-Cleaning Systems Air-Cleaning Devices.pdf

1、Page 1 of 3 2016 ASHRAE. All rights reserved. ERRATA SHEET FOR ANSI/ASHRAE STANDARD 145.2-2011 Laboratory Test Method for Assessing the Performance of Gas-Phase Air-Cleaning Systems: Air-Cleaning Devices January 12, 2016 The corrections listed in this errata sheet apply to ANSI/ASHRAE Standard 145.2

2、-2011. The first printing is identified on the outside back cover as “Product code: 86477 8/11”. Shaded item has been added since the previously published errata sheet dated October 29, 2013 was distributed. Page Erratum 18 Table 6.1.4.1 Standard Test Challenge Gases. In Table 6.1.4.1, in the column

3、 titled “Required Chemical”, replace the symbol “” with a check box “” indicating that compund is the required chemical. See excerpt from table attached. The remainder of Table 6.1.4.1 is unchanged. 19 Table 6.1.4.1 Standard Test Challenge Gases. Revise the units for the low concentration limit for

4、Carbon Dioxide from ppb to ppm. See excerpt from table attached. The remainder of Table 6.1.4.1 is unchanged. (Note: Additions are shown in underline and deletions are shown in strikethrough.) 21 10.6 Standard Capacity Test Penetration, Pt(%). Replace Section 10.6 with the following: 10.6 Standard C

5、apacity Test Penetration, Pt(%). Compute the penetration for each time interval using Equation 10-1. Pt= 100CiCot(10-1) where: Ci= inlet (media challenge) gas concentration (in ppm) averaged over the high concentration challenge portion of the test Cot= outlet (media downstream) gas concentration (i

6、n ppm) at time “t” Since rig background concentrations must be insignificant, background corrections are not required to be made. Plot the penetration versus elapsed challenge time (beyond the conditioning period). 27 Normative Annex A. Insert Figure A-1 after Section A2.2 Example of Leakage From an

7、 ASHRAE Standard 52.2 Duct. Figure A-1 is missing from the published standard. See attached Figure A-1. Page 2 of 3 2016 ASHRAE. All rights reserved. Table 6.1.4.1 Standard Test Challenge Gases Category / Chemical CAS # MW* Low Conc. (ppb) High Conc. (ppm) NIOSHREL TWA (ppm)*OSHA PEL TWA (ppm)*High

8、Conc. Rationale * Capacity Used*Required ChemicalSulfur Dioxide 7446-09-5 64.1 50 35 2 5 AA 6%, x 8%, yb Formaldehyde 50-00-0 30.0 100 1 0.016 0.75 EE 3%, x Ammonia 7664-41-7 17.0 100 75 25 50 AA 5%, ya Ozone 10028-15-6 48.0 75 0.5 0.1 (c) 0.1 BB none Toluene 108-88-3 92.1 400 50 100 200 AA 20%, z D

9、MMP 756-79-6 124.1 75 20 none none TABLE 6.1.4.1 Standard Test Challenge Gases Category / Chemical CAS # MW* Low Conc. (ppb) High Conc. (ppm) NIOSHREL TWA (ppm)*OSHA PEL TWA (ppm)*High Conc. Rationale * Capacity Used*Required ChemicalMiscellaneousCarbon Dioxide 124-38-9 44.0 400 5,000 5,000 5,000 DD

10、 NOTES: * Molecular Weight *Includes NIOSH Recommended Exposure Limits and OSHA Permissible Exposure Limits that have been vacated. The values are time-weighted averages unless otherwise indicated as follows: c = ceiling value, st = short term * Rationale for the Recommended High Concentration is as

11、 follows: AA = Based on the concentration of gas required to consume 2 ft3of media at 2000 cfm in 8 h BB = based on consideration of safety, health, and reactivity with materials of construction CC = based on consideration of safety, health, and low odor threshold DD = based on NIOSH and OSHA TWAs E

12、E = based on considerations of safety and health * Capacities taken from standard industry sources such as the carbon tables. Media types indicated below: x = permanganate-impregnated activated alumina ya = acid-impregnated activated carbon yb = base-impregnated activated carbon z = virgin activated carbon, bituminous +Challenge gas shall be NO2; analysis shall be performed for both NO2 and NO. Units for Low Concentration for Carbon Dioxide are ppm. Page 3 of 3 2016 ASHRAE. All rights reserved. Figure A-1. Static leak test of ASHRAE Standard 52.2 duct after test rig sealing.