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- Page 1 UNITARY SMALL AIR-CONDITIONERS AND AIR-SOURCE HEAT PUMPS (INCLUDES MIXED-MATCH COILS) (RATED BELOW 65,000 BTU/H) CERTIFICATION PROGRAM AHRI OM 210/240 – JANUARY 2017 Sponsored and administered by: 2111 Wilson Blvd, Suite 500 Arlington, Virginia 22201 (703) 524-8800...
- Page 2 A Certification Agreement is executed between the manufacturer and AHRI specifying the conditions under which such Ratings and the Mark may be used. No manufacturer has the right to use Program Ratings or to state that their products have been tested in conformance with the procedures outlined in this Rating Procedure unless and until they have received written authority from AHRI to use the Marks as applied to the specific approved Program Ratings.
- Page 3 USAC (INCLUDING MIX-MATCH COILS) AND USHP (INCLUDING MIX-MATCH COILS) CERTIFICATION PROGRAM OPERATIONS MANUAL TABLE OF CONTENTS SECTION PAGE Program Overview Applicable Rating Standard ..................1 Product Definitions ......................1 1.2.1 Air-Source Unitary Heat Pump............1 1.2.2 Independent Coil Manufacturer (ICM) ..........1 1.2.3 Indoor Unit...................
- Page 4 Private Brand Marketer (PBM) Applicants ..............4 STEP 2.2.1 Certification Application Package ............5 STEP 2.2.2 Processing Application Package ............5 STEP 2.2.2.1 Performance Certification Agreement for Private Brand Marketer (PBM Agreement) ......5 STEP 2.2.2.2 OEM Agreement on Behalf of the PBM Applicant ..5 STEP 2.2.2.3 Licensing Fee Invoice ..........
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Page 5: Table Of Contents
4.3.2 Final Outcome ICM Challenge Test Failure ........14 4.3.3 Final Outcome ICM Challenge Test Pass ......... 14 5 AHRI Directory of Certified Product Ratings Data Listings Publication of Ratings in Certified Directory ............... 15 Data Forms ......................... 15 5.2.1 Making Changes to Submissions ............. - Page 6 Equipment Delivery/Disposal Fees ................19 7 Issuance of Violations and/or Termination ................19 8 Program Hierarchy, Complaints, and the Appeals Process ............ 19 9 Proper Use of the AHRI Certification Mark and Claims to Certification ......... 19 Tables Table B1 AHRI Submittal Requirements for High or Single Stage ........
- Page 7 Appendices and Forms Appendix A Requirements for Certification of ICM Heat Pump Ratings ........20 Appendix B Condenser Curve Information ................22 Appendix C Condensing Units for Coil Only Certification ............28 Appendix D Compliance Program Flow Charts ................ 30 Appendix E Independent Coil Manufacturer BMG Definitions ..........
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Page 9: Applicable Rating Standard
Applicable Rating Standard. It is mandatory for program Participants to comply with the provisions of the latest edition of AHRI Standard 210/240 Performance Rating of Unitary Air-Conditioning & Air-Source Heat Pump Equipment (Standard). A copy of the Standard is available for download from the AHRI website, www.ahrinet.org. -
Page 10: Unitary Small Air-Source Heat Pumps (And Mix-Matched Coils Certification Program (Ushp)
Manufacturer). When calculating the number of tests for a Participant’s annual testing requirement, AHRI shall take the number of active BMGs at the time of selection. The number of tests shall be reviewed again at a later date to determine if additional tests are required. -
Page 11: Original Equipment Manufacturer (Oem) Applicants
AHRI General Operations Manual, Section 4. STEP 2.1.1 Certification Application Package. In addition to the Application for AHRI Certification and Annual Sales Volume Form noted in the AHRI General Operations Manual, Section 4, STEP 4.1, Applicants shall submit the following documentation to AHRI: ... -
Page 12: Step 2.1.4 Qualification Testing
STEP 2.1.3.2 Acquisition of Qualification Test Samples/Selection Criteria. Within 30 calendar days of a request from AHRI, the Applicant shall have samples available for selection. Samples shall be acquired in accordance with Section 3.4 of this manual. All samples shall be provided with the equipment listed in Sections 3.6 and 3.7 of this manual. -
Page 13: Step 2.2.1 Certification Application Package
Rating Screening (Section 5) for ICMs process, but was approved by AHRI to be listed in the Directory, then AHRI shall select up to three (3) additional models from those filtered models for test. If a Participant does not have ratings that were filtered out, they are not subject to this additional testing. -
Page 14: Location Of Test
(refer to Appendix H). Selection of Test Samples. Selections shall be made based on active and discontinued data contained in the Directory. AHRI shall inform the Participant, in writing, of the sample(s) selected for test. 3.3.1 Selection Requirements for Annual Testing. -
Page 15: System Manufacturer's Required Equipment Provisions
USE OM - JANUARY 2017 System Manufacturer’s Required Equipment Provisions. The System Manufacturer shall provide a complete system, consisting of the following: Outdoor Unit; Indoor coil; Expansion device; Air-moving equipment (if required); Other listed system enhancement devices; and ... -
Page 16: Tests, Air-Conditioning (Systems And Mix-Matched Coils)
SEER and HSPF. AHRI may require, at the expense of the Program, “C” and “D” tests to be performed on systems to assure sufficient qualified condensing units for ICM tests. -
Page 17: Disqualified Unit
HSVTC be tested. If the HSVTC passes the test, then the Participant has the option to have another sample selected for test by AHRI from the same BMG to save the rest of the BMG. If the other... -
Page 18: First Sample Certified Rating Test Failure
3.18.2.3 Alternate Outdoor Unit Failures. Any ICM test selections made by AHRI using an HSVTC alternate Outdoor Unit that fails certified ratings per Figure C2 (Appendix C) shall be incremental to the OEM’s yearly selection. The test’s results shall be credited to the OEM’s following year’s selection and the test failure shall follow the current operations manual procedure. -
Page 19: Test Additional Samples Option
USE OM - JANUARY 2017 3.18.3 Test Additional Samples Option. 3.18.3.1 Following a First Sample Failure. The Participant shall identify the maximum number of additional tests requested up to a maximum of three (3). The first additional test shall be performed; this sample is considered the “second sample”... -
Page 20: Statistical Analysis Procedure
3.18.3.1.1 Statistical Analysis Procedure. AHRI shall perform a statistical analysis based on the number of samples tested. �� ∑... -
Page 21: Naeca And Energy Policy Act (Epact) Re-Rating Requirements
Participant has the option to have another non-HSVTC sample selected for test by AHRI from the same BMG to save the rest of the BMG. If the other sample fails, the entire BMG other than the HSVTC sample is re-rated to the latest test results. -
Page 22: System Challenge Test Failure
USE OM - JANURY 2017 4.2.1.3 System Challenge Test Failure. In the event the System Manufacturer’s system does not pass at or above 95%, the challenge test shall be redirected towards the System Manufacturer and treated as a System Manufacturer’s challenge. -
Page 23: Ahri Directory Of Certified Product Ratings Data Listings
NAECA Requirements. The Directory only lists equipment meeting NAECA minimum. If a product, or group of products, shall be removed from the Directory for failure to meet NAECA minimum, AHRI shall notify DOE of the delisting. It is solely the Participant’s responsibility to address all DOE requests and... -
Page 24: Doe Approved Alternate Rating Method
ARM, if an ARM was used to develop the sample’s ratings. Failure to submit the DOE approved letter of their ARM to AHRI shall result in the removal of the products in the Directory until AHRI has received and reviewed the ARM. -
Page 25: Heat Pump Listing Requirements
ICM Notice of Revised System HSVTC and/or Baseline Rating. ICM Participants using an ARM shall be notified by AHRI if a change is made to a system HSVTC and/or baseline rating. The baseline rating is derived from an existing AHRI certified system combination provided by the ICM. The ICM Participant shall have 30 calendar days to review the notice and choose to a) re-rate its affected units or b) decide no rating change is required. -
Page 26: Entering Data Above 6% Screen
System Manufacturer HSVTC combination is coil-only, Participants shall be required to provide test reports and/or ARM simulation input/output justifying the rating. Based on AHRI’s approval, the listings shall be published in the Directory. 5.12.2 Coil Geometry Screening. -
Page 27: Condenser Characteristics
Laboratory. However, following the completion of the test, the sample shall be shipped prepaid by AHRI to the destination specified by the Participant. The Participant shall provide instruction to the Laboratory regarding the disposal/shipment of the sample(s). -
Page 28: Appendix A Requirements For Certification Of Icm Heat Pump Ratings
Note: Wall thickness is 0.012 for Copper and 0.029 for Aluminum. Manufacturers have the option to perform an AHRI test at the Laboratory over and above what their yearly testing requirements are to add in a rating that does not meet this criteria. - Page 29 USE OM – JANUARY 2017 Mixed Expansion Device Requirements Mixed systems may use an appropriately sized thermostatic expansion valve (TXV) except for series restrictor systems described below. Flow Factor requirements on mixed coils with fixed restrictions: If the Highest Sales Volume Tested Combination (HSVTC) matched system has a fixed restrictor, then the mixed system flow factor shall be within the range of 100- 125%;...
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Page 30: Table B1 Ahri Submittal Requirements For High Or Single Stage
HSVTC heat pump Outdoor Units, cooling only performance and power; and AHRI/DOE A, B, C, D, F, and H test conditions as defined in AHRI Standard 210/240. Definitions Condensing Unit – Consists of the Outdoor Unit and all interconnecting lines, liquid and suction, used to connect the outdoor refrigeration system to the Indoor Unit. -
Page 31: Table B2 Ahri Submittal Requirements For Low Stage
30 days to make the appropriate corrections or provide evidence to validate their curve. If Participants do not make the corrections and respond to AHRI within 30 days, AHRI shall hide the invalid BMGs in the Directory until corrected. -
Page 32: Figure B1 Equation Coefficients
USE OM - JANUARY 2017 Determine required HSVTC Data See Table 1 Simulate Use different evaporating temperatures Determine the values required in Table 2 Perform least Only 2 evaporator squares linear temperatures regression using simulated? simulations (Ref Table 2) Calculate slopes and intercepts from regression;... -
Page 33: Table B3 Doe Hsv Test Data
USE OM - JANUARY 2017 Table B3: DOE HSVTC Test Data DOE HSVTC Test Data Comments Item Value Indoor Power, watts Mean System Net Capacity, A-test, Btu/h Mean of the values measured during HSVTC testing Outdoor Unit Gross Capacity, A-test, Calculated value;... -
Page 34: Table B5 Simulation Inputs For Low Stage
USE OM - JANUARY 2017 Table B5: Simulation Inputs for Low Stage Simulation Inputs Comments Item Value B-Test Saturated suction temperature, evaporator leaving Evaporator Temperature, T1, F Includes pressure loss of interconnecting lines with addition of indoor power converted to btuh Condenser Capacity, B-test, @ T1, btuh Compressor &... -
Page 35: Figure B2 Typical Condenser Capacity Curve
USE OM - JANUARY 2017 Typical Condenser Capacity Curve 38000 36000 34000 HSVTC 32000 30000 HSVTC 28000 26000 24000 22000 20000 18000 Evaporator Temperature, F A-Test B-Test Figure B2: Typical Condenser Capacity Curve Typical Condenser Power Curves 2700 2600 2500 2400 HSVTC 2300... -
Page 36: Figure C1 Use Of Provisionally Qualified Outdoor Units For Icm Testing
USE OM - JANUARY 2017 APPENDIX C: CONDENSING UNITS FOR COIL-ONLY CERTIFICATION Figure C1: Use of Provisionally Qualified Outdoor Units for ICM Testing... -
Page 37: Figure C2 Use Of Unqualified Outdoor Units For Icm Testing
USE OM - JANUARY 2017 Figure C2: Use of Unqualified Outdoor Units for ICM Testing... -
Page 38: Figure D1 Selection And Testing Process
USE OM - JANUARY 2017 APPENDIX D: COMPLIANCE PROGRAM FLOW CHARTS AHRI Selection Process Break-in Per Participant’s Break-in Instructions (Participant’s Requested? Expense) First Test Sample Certification Testing Rated Values Pass First Test Failure Certification Test? See Appropriate Chart for First... -
Page 39: Figure D2 System Manufacturer First Test Failure Options
USE OM - JANUARY 2017 System Manufacturer First Test Failure Options (Efficiency Above NAECA Minimum) Rerate – Rerate all Combinations in the BMG Complete using the First Sample Test Results Total runtime < 16 Retest the same unit as Retest determines the hours? first sample test first test pas or failure. -
Page 40: Figure D3 Icm First Test Failure Options
Obsolete – All combinations in Complete that BMG will be derated and obsolete. Same coil & AHRI Second selects outdoor Sample Test Second Sample with unit from another a Different Outdoor Unit... -
Page 41: Figure D4 Icm Second Sample Test
USE OM - JANUARY 2017 ICM Second Sample Test with Different Outdoor Second Sample Components Second Test Sample Certification Testing Certified Values Rerate Original Pass Certification Failed Tested Test? Combination Second Test Failure Complete Rerate the Second Sample Combination and All Models within the BMG Figure D4: ICM Second Sample Test... -
Page 42: Figure D5 Test Additional Samples Process
USE OM - JANUARY 2017 Test Additional Samples Process Receive Additional Sample Tests Break-in per Participant’s Break-in Instructions (Participant’s Requested? Expense) Additional Test Sample Certification Testing Is this First Did First Testing is Additional Sample Additional Sample Complete Test? Pass? Perform Statistical Analysis with Is this Last... -
Page 43: Figure D6 System Manufacturer Test Additional Samples Failure Options
USE OM - JANUARY 2017 Systems Manufacturer Test Additional Samples Failure Options Tested Efficiency > NAECA Minimum Tested Combination HSVTC Rerate All HSVTC for the Save HSVTC? Combinations in BMG is tested the BMG Rerate All HSVTC Combinations in Passes? the BMG Only the Tested Combination is... -
Page 44: Figure D7 Icm Or System Manufacturer First Or Additional Sample Failure Options
USE OM - JANUARY 2017 ICM or Systems Manufacturer Test Failure Options Test Efficiency < NAECA or EPACT Minimum Test Efficiency < NAECA or EPACT Minimum See Test Participant Additional Is this First Elects to Test Samples Sample Test? Additional Process Samples? Tested Combination is... -
Page 45: Table E1 Icm Bmg Definitions
APPENDIX E – INDEPENDENT COIL MANUFACTURER BMG DEFINITION Table E1: ICM BMG Definition Evaporator Parameters that Define a ICM Basic Model Group Parameter Characteristics Comments Capacity 6,000 Btu/h increments One Per 6,000 Btu/h capacity. (For example, see Table F2) Air-Handler Yes or No (mixed case) Single Speed;... -
Page 46: Table E2 Icm Bmg Bucket - Coil Capacity
Table E2: ICM BMG Bucket – Coil Capacity Coil Type Vertical Horizontal AHRI Type Coil Blower (-CB) Coil Only (-C) BMG Bucket – Coil Capacities Min Capacity (in Btu/h) Max Capacity (in Btu/h) 6000 11900 12000 17900 18000 23900 24000... -
Page 47: Appendix F Setup, Commissioning And Operating Checklist For Laboratory Personnel
APPENDIX F – SETUP, COMMISSIONING AND OPERATING CHECKLIST FOR LABORATORY PERSONNEL Setup Checklist and Operating Procedures for the Laboratory Personnel: Verify that the nameplate model is the same as the AHRI requested model. Check if there are additional comments in the data. -
Page 48: Appendix G Coil Geometry Screening
Participants have the option to perform an AHRI test at the Laboratory in addition to their yearly testing requirements, to add a rating that does not meet the aforementioned criteria. -
Page 49: Figure G1 Part 1 Of The Ornl Flowchart
USE OM - JANUARY 2017 Start with outdoor and ICM Coil only indoor model rating numbers Determine Systems outdoor model System Design Stages = Single Done Stage Get Systems Coil only ratings Calculate systems tube surface =EvapTubeOD*PI*SlabFinnedLength* NumberofTubes Get Systems rating with smallest tube surface... -
Page 50: Figure G2 Part 2 Of The Ornl Flowchart
USE OM - JANUARY 2017 Figure G2: Part 2 of the ORNL Flowchart... -
Page 51: Figure G3 Part 3 Of The Ornl Flowchart
0.45 3.12% Calculate SEER difference: = System SEER (1 + Total SEER effect) / ICM Rated SEER Rating Validated by ICM SEER difference AHRI ARM Software Rating allowed >=97% >=94% ITS Lab test data >=95% before Rating allowed rating is allowed... -
Page 52: Appendix H Uniform Test Method For Measuring The Energy Consumption Of Central Air Conditioners And Heat Pumps - Normative
APPENDIX H. UNIFORM TEST METHOD FOR MEASURING THE ENERGY CONSUMPTION OF CENTRAL AIR CONDITIONERS AND HEAT PUMPS – NORMATIVE Foreword: This appendix to the AHRI USE OM is the “LEAP Process” referred to in Section 3.2.2. Appendix to OM-210/240 Certification of Laboratory... - Page 53 USE OM - JANUARY 2017 TABLE OF CONTENTS SECTION PAGE Preface ..........................61 Purpose Purpose ........................61 Intent – Third Party Laboratories ............61 1.1.1 Intent – Original Equipment Manufacturer (OEM) Laboratories ..61 1.1.2 1.1.3 Review and Amendment ..............61 Scope Scope..........................
- Page 54 5.4.3.3 Secondary Capacity Check Type ......77 5.4.4 Running the Test Procedure............78 5.4.4.1 ................78 5.4.4.1.1 AHRI 210/240 Standard Tests ..78 5.4.4.1.2 Evaluation of Latent Capacity Measurement ....78 5.4.5 Data to Collect.................. 78 5.4.6 Interpretation and Application of the Data ........78 5.4.7...
- Page 55 USE OM - JANUARY 2017 Figure K1 Nozzle Combination Tests ................... 66 Figure K2 Passive Pressure Drop Device ................75...
- Page 56 It is highly advised that the laboratory that wishes to perform LEAP should obtain the latest copy from the AHRI web site prior to execution. Tolerance changes may be made by the Committee by providing a request to the AHRI USE Compliance Committee and shall be performed with the authority of the Committee only.
- Page 57 Facility. 3.8.1 Authorized Laboratory Facility. A Laboratory Facility that has completed all tests in compliance with this appendix and has been provided with a letter of approval from AHRI for use of their facility for AHRI certification testing. 3.8.2 OEM Laboratory Facility. A laboratory facility utilized by an Original Equipment Manufacturer to develop certified ratings.
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Page 58: Test Procedure
Psychrometric Test Facility ambient air conditions and Unit Under Test performance are recorded. For steady state operation Test time is typically 30 minutes. All Standard Tests prescribed in AHRI Standard 210/240 Section 6.1.3 are considered a Test. -
Page 59: Test Setup
USE OM - JANUARY 2017 Section 5. Certification Requirements Sensible Heat Capacity Evaluation of Code Tester. 5.1.1 Purpose of the Test. The purpose of the sensible heat capacity calibration of the code tester test is to compare the psychrometric measured sensible heat capacity to the total electrical energy input of the unit under test. - Page 60 USE OM - JANUARY 2017 5.1.4.2.1 Prior to running any electric heat tests, it is necessary to verify that the entering and leaving RTD match when no load exists. Select an air flow between 1000 to 1400 range and allow the unit and facility to pre-condition for at least one (1) hour.
- Page 61 USE OM - JANUARY 2017 Figure K1: Nozzle Combination Tests...
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Page 62: Data To Collect
USE OM - JANUARY 2017 5.1.5 Data to Collect. 5.1.5.1 The following data is the minimum to be collected for each test performed: sensible heat energy balance, % power input, indoor, W electric heat module power input, W power input total, W L/S = instrument induced latent to sensible capacity ratio, q pressure, barometric, in. -
Page 63: Interpretation And Application Of The Data
USE OM - JANUARY 2017 5.1.6 Interpretation and Application of the Data. 5.1.6.1 Sensible Capacity Energy Balance. B , the sensible capacity energy balance, is defined as follows: �� −�� ������ ��ℎ�� �� ∙ 100 ���� �� ������ Where; = sensible capacity as calculated in ASHRAE Standard 37 (7.3.4.1) If blower is not powered then q is calculated as follows, ��... - Page 64 USE OM - JANUARY 2017 be a first order equation with respect to the calculated air flow rate. This is not an iterative process. = 1 + (A + BQ ) * B / 100 Where; A = intercept constant from first order trend line B = slope constant from first order trend line = nozzle correction factor 5.1.6.2.2.3...
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Page 65: Reporting And Retention Of The Data
Section 9.2 of ASHRAE Standard 116 (e.g. the cyclic test for single stage product in AHRI Standard 210/240). -
Page 66: Running The Test Procedure
USE OM - JANUARY 2017 5.2.3.5 At least one (1) thermocouple shall be attached via solder method per ASHRAE Standard 41.1 Section 7.2.10; or mechanically attach thermocouples to each potential large thermal mass between the outlet of the UUT and the grid of thermocouples specified in Section 5.2.3.4. Thermocouples shall be connected in parallel. -
Page 67: Interpretation And Application Of The Data
USE OM - JANUARY 2017 5.2.6 Interpretation and Application of the Data. Specifically, this Thermal Energy Storage Effect Test is measuring q and integrated thermal mass change in temperature of the cyclic cooling or heating capacity per ASHRAE Standard 116 Section 9.2.2 to determine the term. -
Page 68: Reporting And Retention Of The Data
USE OM - JANUARY 2017 = Air Measured Capacity (Average) / (Mass Temp at Start of “Off” Cycle – Mass Temp Calculate mc at End of “Off” Cycle) * (6 minutes/60 minutes/Hr) = 2435 / (89.9 – 71.0) * 0.1 = 12.88 5.2.7 Reporting and Retention of the Data. -
Page 69: Test Setup
USE OM - JANUARY 2017 Figure K1. Passive Pressure Drop Device Refer to Figure 8 in ASHRAE 37 for inlet and outlet duct dimensions. 5.3.3 Test Setup. 5.3.3.1 The passive pressure drop device shall be set up in accordance with ASHRAE Standard 37 Section 6.4 through Section 6.6, except as noted below in Section 5.3.3.2. -
Page 70: Running The Test Procedure
Running the Test Procedure. 5.3.4.1 Indoor air inlet conditions shall be those specified for the A test in AHRI Standard 210/240 Section 6.1.4.1 Table 3. These nominal conditions are 80°F DB and 67°F. Tolerances shall also be per AHRI Standard 210/240. -
Page 71: Reporting And Retention Of The Data
Table 2 of AHRI Standard 210/240. Initial testing preference would be given to either a split system (HRCU- A-CB) or a single package system (HSP-A). For repeat Round Robin Testing, alternate types of systems shall be selected. -
Page 72: Ahri 210/240 Standard Tests
(7) years. All Round Robin Test Data shall be reported in both the laboratory standard report format, as well as XML format (if available), as required by the AHRI USE Operations Manual. Evaluation of Latent Capacity Measurement. -
Page 73: Test Setup
USE OM - JANUARY 2017 5.5.3.1 ASHRAE Standard 37 Section 7.8 outlines a method for calculating the latent capacity based on the mass flow rate of the cooling condensate draining from the indoor coil for equipment with a rated capacity of 135,000 Btu/h or higher that use an indirect method for determining airflow rate. This appendix shall apply the same methodology to equipment with a rated capacity of 65,000 Btu/h or less with a direct measurement of airflow rate. -
Page 74: Interpretation And Application Of The Data
All data and results identified in Sections 5.4.5 and 5.4.6 shall be reported for each test. Data and results shall be retained for a minimum of seven (7) years. All Round Robin Test Data shall be reported in both the laboratory standard report format, as well as XML format (if available) as required by the AHRI USE Operations Manual. -
Page 75: Appendix I Secondary Capacity Check Requirements
Section 1. Purpose The purpose of this appendix is to specify the requirements for secondary capacity checks that any independent third party laboratory must comply with during AHRI USE Certification Program testing. Section 2. Scope The requirements of this appendix shall apply to all USE Certification Program testing of: 2.1.1... - Page 76 USE OM - JANUARY 2017 Section 5. Requirements Usage of Refrigerant Mass Flow Method 5.1.1. All split systems, whether ducted or non-ducted, shall use the refrigerant mass flow method as the secondary capacity check for all steady state tests per Section 6 of this appendix. 5.1.2 The absolute value of heat balance (HB) shall be 4.0% or less on all tests, except for H3 which may be greater if:...
- Page 77 USE OM - JANUARY 2017 Temperature Measurement Requirements: 6.2.1 Temperature measurements shall be taken per the latest edition of ASHRAE Standard 41.1. 6.2.2 Temperature measurements shall be taken using the preferred method of refrigerant temperature measurement (resistance temperature devices (RTDs) per ASHRAE Standard 41.1 Section 8.1). If used, RTDs shall be installed with tubing arrangement such that pressure drops due to application do not exceed 0.5 psig.
- Page 78 USE OM - JANUARY 2017 Mass Flow Procedure Requirements 6.4.1 The actual internal volume of pressure transducer assemblies and flow meter assemblies shall be measured or calculated prior to setup and recorded with test report data. Either document hose diameters (OD and ID) and length of hoses used, or calculate internal volume (above).
- Page 79 USE OM - JANUARY 2017 7.2.2 Outdoor air inlet temperatures shall be measured with RTD using sampling device per the latest edition of ASHRAE Standard 41.1 and 41.6. 7.2.2.1 All air inlet temperature measurements shall be taken using a sampling tree. 7.2.2.2 Sampling trees shall cover at least ¾...
- Page 80 Section 6.2. 7.4.2 Any code tester used must have completed Section 5.1 of the Laboratory Evaluation and Adjustment Plan, in AHRI USE OM for calibration. 7.4.2.1 Any correction factors used from the LEAP evaluation process as noted in Section 7.4.2 shall be recorded on the final test report.
- Page 81 Section 7.5 shall be added to the Outdoor Unit, and a Closed Duct test shall be conducted. All steady state requirements per AHRI Standard 210/240, ASHRAE Standard 37 and 10 CFR 430 Appendix M to Subpart B shall be met. During this CD test the following parameters shall be met: 7.6.4.1...
- Page 82 USE OM - JANUARY 2017 7.6.4.9.1 For other refrigerants, the pressure of the closed duct test shall be within 0.3°F saturation temperature of the FA test. 7.6.4.10 Pressure variation for both high side and low side shall be in the same direction, e.g. if high side pressure is higher in close duct test, low side pressures are not permitted to be lower than close duct test (when rounded to closest 0.1 psig).
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