Laboratory Test Report for Fujitsu 12RLS and Mitsubishi FE12NA Mini-Split Heat Pumps Jon Winkler, Ph.D.

September 2011

NOTICE

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Laboratory Test Report for Fujitsu 12RLS and Mitsubishi FE12NA Mini-Split Heat Pumps

Prepared for:

Building America

Building Technologies Program

Office of Energy Efficiency and Renewable Energy

U.S. Department of Energy

Prepared by:

Jon Winkler

National Renewable Energy Laboratory

1617 Cole Boulevard

Golden, CO 80401-3393

September 2011

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Contents List of Figures ............................................................................................................................................ vi

List of Tables ............................................................................................................................................. vii

Definitions ................................................................................................................................................. viii

Executive Summary and Acknowledgments............................................................................................ 1

1 Project Overview................................................................................................................................... 2

2 Test Description .................................................................................................................................... 4

2.1 Experimental Test Facility ...................................................................................................4

2.2 Measurements ......................................................................................................................4

2.3 Heating Mode Tests .............................................................................................................5

2.4 Cooling Mode Tests .............................................................................................................6 3 Airflow Measurements ......................................................................................................................... 7

4 Heating Test Results ............................................................................................................................ 8

4.1 Steady State Fujitsu 12RLS ..............................................................................................8

4.2 Steady State Mitsubishi FE12NA ...................................................................................11

4.3 Defrost Cycle .....................................................................................................................15

Cycling Tests ...........................................................................................................................16 5 Cooling Test Results .......................................................................................................................... 17

5.1 Steady State Fujitsu 12RLS ............................................................................................17

5.2 Steady State Mitsubishi FE12NA ...................................................................................20

5.3 Cycling Tests .....................................................................................................................23 6 Conclusions ........................................................................................................................................ 24

References ................................................................................................................................................. 25

Appendix AMini-Split Heat Pump Laboratory Test Results ................................................................ 26

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List of Figures Figure 1. Instrumented outdoor unit (left) and instrumented indoor unit (right) covered by

insulated discharge plenum ...................................................................................................... 4

Figure 2. Experimental test code description .......................................................................................... 6

Figure 3. Fujitsu 12RLS steady-state heating capacities (70F return temperature) ........................... 8

Figure 4. Fujitsu 12RLS maximum steady-state heating capacity compared to manufacturer-reported data (70F return temperature) .................................................................................. 9

Figure 5. Fujitsu 12RLS steady-state heating COP (70F return temperature) ................................... 10

Figure 6. Fujitsu 12RLS heating COP compared to manufacturer-reported data (70F return temperature) .............................................................................................................................. 11

Figure 7. Mitsubishi FE12NA steady-state heating capacities (70F return temperature) ................ 12

Figure 8. Mitsubishi FE12NA maximum steady-state heating capacity compared to manufacturer-reported data (70F return temperature) ................................................................................ 13

Figure 9. Mitsubishi FE12NA steady-state heating COP (70F return temperature) .......................... 14

Figure 10. Mitsubishi FE12NA heating COP compared to manufacturer-reported data (70F return temperature) .............................................................................................................................. 14

Figure 11. Fujitsu 12LRS outdoor coil immediately prior to defrost operation (left) and outdoor coil immediately following defrost operation (right) .................................................................... 15

Figure 12. Fujitsu 12RLS steady-state total cooling capacity (80F DB, 67F WB return condition) 17

Figure 13. Fujitsu 12RLS maximum steady-state total cooling capacity compared to manufacturer-reported data (80F DB, 67F WB return condition) .............................................................. 18

Figure 14. Fujitsu 12RLS steady-state cooling COP (80F DB, 67F WB return condition) .............. 19

Figure 15. Fujitsu 12RLS steady-state cooling COP compared to manufacturer-reported data (80F DB, 67F WB return condition) ................................................................................................ 19

Figure 16. Mitsubishi FE12NA steady-state total cooling capacity (80F DB, 67F WB return condition) ................................................................................................................................... 20

Figure 17. Mitsubishi FE12NA maximum steady-state total cooling capacity compared to manufacturer-reported data (80F DB, 67F WB return condition) ...................................... 21

Figure 18. Mitsubishi FE12NA steady-state cooling COP (80F DB, 67F WB return condition) ...... 22

Figure 19. Mitsubishi FE12NA steady-state cooling COP compared to manufacturer-reported data (80F DB, 67F WB return condition) ...................................................................................... 22

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List of Tables Table 1. Comparison of Manufacturer Reported Data ............................................................................. 3

Table 2. Experimental Indoor Fan Performance Compared to Manufacturer Reported Values ......... 7

Table 3. Defrost Test Results ................................................................................................................... 16

Table 4. Cycling Test Results .................................................................................................................. 16

Table 5. Fujitsu 12RLS Steady-State Heating Test Results .......................