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ASHRAE Standard 194 2012

ASHRAE Standard 194 2012

$22.21

ANSI/ASHRAE Standard 194-2012 Method of Test for Direct-Expansion Ground-Source Heat Pumps

Published By Publication Date Number of Pages
ASHRAE 2012 18
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Standard 194-2012 provides test procedures for rating factory-made residential, commercial, and industrial direct-expansion ground-source heat pumps. The heat-pump capacity range covered in this standard is 5.3 to 52.7 kW (18,000 to 180,000 Btu/h) and all standard voltage and frequency ratings.

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PDF Pages PDF Title
1 ANSI/ASHRAE Standard 194-2012
4 FOREWORD
1. PURPOSE
2. SCOPE
2.1 This standard provides test procedures for determining heating capacity, cooling capacity, coefficients of performance (COPs), and energy efficiency ratio (EER) for systems, as defined in Section 3.
2.2 This standard applies only to electrically driven, mechanical vapor-compression refrigeration systems.
2.3 This standard applies to the testing of heat pumps with an outdoor refrigerant to test liquid heat exchanger used to condition the refrigerant entering the system. This standard does not apply to individual assemblies for separate use.
3. DEFINITIONS AND nomenclature
3.1 Definitions. All terms in this document shall follow the standard industry definitions in the current edition of ASHRAE Terminology of Heating, Ventilating, Air Conditioning and Refrigeration (1911) unless otherwise defined in this section.
5 3.2 Nomenclature
6 Figure 1 Type 1: DX-to-air split system.
4. CLASSIFICATIONS
4.1 Type 1—DX-to-Air Split System. Compressor and indoor coil are in separate cabinets. Indoor coil is with or without a fan (see Figure 1).
4.2 Type 2—DX-to-Air Packaged System. Compressor and indoor coil are in one cabinet, with or without a fan (see Figure 2).
4.3 Type 3—DX-to-Water Split System. Compressor and indoor water-to-refrigerant heat exchanger are in separate cabinets. Indoor heat exchanger is with or without a pump (see Figure 3).
4.4 Type 4—DX-to-Water Packaged System. Includes compressor and indoor water-to-refrigerant heat exchanger in one cabinet. Indoor heat exchanger is with or without a pump (see Figure 4).
5. TEST REQUIREMENTS
5.1 Test Methods. All tests shall be conducted in accordance with ANSI/ASHRAE Standard 37, Methods of Testing Electrically Driven Unitary Air Conditioning and Heat Pump Equipment (2009), and with the test methods and procedures described in Section 6…
7 Figure 2 Type 2: DX-to-air packaged system.
Figure 3 Type 3: DX-to-water split system.
8 Figure 4 Type 4: DX-to-water packaged system.
TABLE 1 Minimum External Resistance
9 TABLE 2 Coefficient of Pump Power Input
TABLE 3 Test Conditions for Determining Performance
11 6. METHOD OF TESTING AND CALCULATIONS
6.1 General. Testing and calculations shall be performed in accordance with the following standards:
6.2 Equipment Installation
6.3 Cooling and Heating Capacity Tests and Calculations for DX-to-Air (Types 1 and 2) Equipment
12 6.4 Cooling and Heating Capacity Tests and Calculations for DX-to-Water (Types 3 and 4) Equipment
13 6.5 Coefficient of Performance and Energy Efficiency Ratio Calculations
14 TABLE 4 Maximum Operating Test Conditions
6.6 Maximum Operating Conditions Test. Direct-expansion ground-source heat pumps shall be designed and produced to pass the following maximum operating conditions test with (1) an indoor-side coil air quantity as determined under Section 5.1.9 for DX…
6.7 Low-Temperature Start and Operating Test. Direct- expansion ground-source heat pumps shall be designed and produced to pass the following low-temperature start and operating test in cooling and heating with indoor air quantities as determined in …
15 TABLE 5 Low-Temperature Start and Operating Test Conditions
TABLE 6 Insulation Effectiveness Test Conditions
6.8 Insulation Effectiveness Test. Direct-expansion ground-source heat pumps shall be designed and produced to pass the following insulation effectiveness test when operating in cooling mode with (1) air quantities for DX-to-air (Types 1 and 2) as de…
7. MEASUREMENTS
7.1 General. Instruments required for the following measurements shall have the accuracy noted. Instruments shall be calibrated at least once per year and a record shall be kept, including (1) date of calibration, (2) method of calibration, and (3) t…
8. REFERENCE PROPERTIES AND DATA
8.1 Thermodynamic Properties of Air
8.2 Thermodynamic Properties of Liquids
8.3 Thermodynamic Properties of Refrigerants
8.4 Thermodynamic Properties of Methanol
16 TABLE 7 Accuracy for Instruments of Measurement
9. REFERENCES

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ASHRAE Standard 194 2012
$22.21