### U.S. DEPARTMENT OFENERGY CENTRAL AIR CONDITIONERTEST PROCEDURES PUBLIC HEARING PRELIMINARYAGENDA LOCATION OF PUBLIC HEARING: FORRESTAL BUILDING

DATE AND TIME: 1000 INDEPENDENCE AVENUE, SW ROOM lE-245 WASHINGTON, DC 20585 TELEPHONE: 202-586-9127 TELEFAX: 202-586-4617 THURSDAY, MARCH 29,2001 9:00 A.M.
- 5:00 P.M. 

### NOTICE OF PROPOSED RULEMAKING PUBLIC HEARING Objective ofHearing
9:00 a.m. to 9:05 a.m. 9:05 to 9: 15 a.m. The objective ofthe public hearing is to gather views onthe proposed test procedure before the Department issues a Final Rule. Opening Remarks and Introductions Agendareview and overview 9: 15 a.m. to 11 :00 a.m. Proposed changes on howto test and rate specific types ofequipment

- Non-defrost heat pumps: opinions onthe three options described in Section III.A.3 ofthe NOPRpreamble

- Heat pumps that incorporate a heat comfort controller 

## *Validity ofcalculation algorithm 

## *Applicability ofalgorithm to equipment types

- Small-duct, high velocity air conditioners and heat pumps 

## *Proposed testprocedure changes (new definition and test as coil only) 

## *Alternative options?

- Two-capacity (two-stage) heatpumps that operate using low-capacity (first stage) when cooling and use both capacity levels (stages) whenheating: better defined. 11 :00 a.m. to 11: 15 a.m. Break 11:15 a.m. to 12:15 p.m. Proposed changes/additions for testing

- Variable-speed, constant CFM blowers 

## * Steady-state tests • Correctionto minimum static• Drop requirement for 8% agreement with certified SCFM? 

## * Cyclic tests

- Single-packaged units: invoking a dewpointrequirement

- Air volume rate used when testing a coil-only, two-capacity unit at low capacity

- Lab installation guidelines 

## *Proposed changes seek to prevent the specification ofa charging criteria that only applies for lab testing 

## *Proposed changes seekto prevent an independent test lab from having to consult with the manufacturer onrefrigerant charging procedure 

## * Are additional guidelines needed to improve consistency among lab installationpractices (e.g., prewashing coils, run-in times on compressors, disabling ofcrankcase heaters, etc.) 12: 15 p.m. to 1: 15 p.m. Lunch (on your own) 1: 15 p.m. to 2:00 p.m. Are further changes needed?

- differentiate between two-capacity units that transition from lowto high capacity (and vice versa) on-the-fly versus units that must shut down for some finite time interval?

- test method for non-ducted equipment (mini-splits and multi-splits)

- others? 2:00 p.m. to 2:30 p.m. Efforts to seek new defaults for the cooling and heating mode cyclic degradation coefficients (CD'S) 2:30 p.m. to 2:45 p.m. Are anytest procedure changes expected to negatively impact a unit's ability to meet the existingNAECA standards? Ifso, are the changesjustified or shouldthey be delayed? 2:45 p.m. to 3:00 p.m. Break 

### WORKSHOP ON OTHERTEST PROCEDURE ISSUES Discussion ofissues that will not affect this revision ofthe DOEtest procedure. 3:00p.m. to 3:45 p.m. Should changes be incorporated into the test procedure that encourage the use ofdevices (e.g., thermostatic expansion valves) thathelp compensate for an incorrect refrigerant charging and insufficient indoor coil air volume rate problems in field installations? 3:45 p.m. to 4:15 p.m. Should DOEpursue having one standard alternative method for rating untested splitsystem combinations? 4:15 p.m. to 4:45 p.m.

### Metrification ofthe DOE test procedure

- briefreport on proposed changes to ISO Standards for ducted (Std. 13253) and non-ducted (Std. 5151) units 4:45 p.m. to 5:00 p.m. Closing remarks and meeting evaluation TestProcedure Web Site URL: http://erendev.nrel.govlbuildings/codes_standards/applbrf/central_air_conditioner2.html