ASHRAE 118.1 08:2008 Edition
$38.46
ASHRAE Standard 118.1-2008 Method of Testing for Rating Commercial Gas, Electric, and Oil Service Water Heating Equipment (ANSI/ASHRAE Approved)
| Published By | Publication Date | Number of Pages |
| ASHRAE | 2008 | 22 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | FOREWORD FOREWORD 1. PURPOSE 1. PURPOSE 2. SCOPE 2. SCOPE 2.1 This standard provides test procedures for determining the efficiency and hot water delivery capability of the water- heating equipment to which it applies. 2.1 This standard provides test procedures for determining the efficiency and hot water delivery capability of the water- heating equipment to which it applies. 2.2 This standard applies to electric resistance, electric air- source heat pump, gas-fired, and oil-fired water-heating equipment, including hot water supply boilers with input ratings less than 12,500,000 Btu/h (3660 kW) and greater than: 2.2 This standard applies to electric resistance, electric air- source heat pump, gas-fired, and oil-fired water-heating equipment, including hot water supply boilers with input ratings less than 12,500,000 Btu/h (3660 kW) and greater than: 2.3 This standard does not apply to gas-fired service water- heating equipment that meets all of the following: 2.3 This standard does not apply to gas-fired service water- heating equipment that meets all of the following: 3. DEFINITIONS AND SYMBOLS 3. DEFINITIONS AND SYMBOLS 3.1 Definitions 3.1 Definitions 3.2 Symbols 3.2 Symbols |
| 6 | 4. CLASSIFICATIONS BY MODE OF OPERATION 4. CLASSIFICATIONS BY MODE OF OPERATION 4.1 Type I. Unit equipped with a self-contained, temperature-activated primary operating control and not requiring circulation of water for heating. 4.1 Type I. Unit equipped with a self-contained, temperature-activated primary operating control and not requiring circulation of water for heating. 4.2 Type II. Unit equipped with a self-contained, flow-activated primary operating control and requiring water flow for heating. 4.2 Type II. Unit equipped with a self-contained, flow-activated primary operating control and requiring water flow for heating. |
| 7 | 4.3 Type III. Unit equipped with a remote temperature- activated primary operating control and requiring circulation through the heater for heating. 4.3 Type III. Unit equipped with a remote temperature- activated primary operating control and requiring circulation through the heater for heating. 4.4 Type IV. Air-source heat pump water heater that can be operated without connection to a storage tank. 4.4 Type IV. Air-source heat pump water heater that can be operated without connection to a storage tank. 4.5 Type V. Air-source heat pump water heater that includes the use of an integral tank for operation. 4.5 Type V. Air-source heat pump water heater that includes the use of an integral tank for operation. 5. REQUIREMENTS 5. REQUIREMENTS 6. INSTRUMENTS 6. INSTRUMENTS 6.1 General. Instruments are required for the following measurements, with the degree of accuracy noted. Instruments shall be calibrated at least once per year, and a record shall be kept containing, at least, the date of calibration, the method of c… 6.1 General. Instruments are required for the following measurements, with the degree of accuracy noted. Instruments shall be calibrated at least once per year, and a record shall be kept containing, at least, the date of calibration, the method of c… 6.2 Temperature. Temperature-measuring devices and any associated readout instrumentation shall be in accordance with ANSI/ASHRAE Standard 41.1.2 The time constant of the thermocouples used for measuring the inlet and outlet water temperatures shall … 6.2 Temperature. Temperature-measuring devices and any associated readout instrumentation shall be in accordance with ANSI/ASHRAE Standard 41.1.2 The time constant of the thermocouples used for measuring the inlet and outlet water temperatures shall … 6.3 Draft. Minimum divisions on the draft gauge shall be 0.005 in. of water column (1 Pa). 6.3 Draft. Minimum divisions on the draft gauge shall be 0.005 in. of water column (1 Pa). 6.4 Higher Heating Value. The measurement of the higher heating value of natural gas, propane, or fuel oil shall be conducted on-site. Exception: bottled gas and a single test batch of fuel oil can be third-party certified by an independent test labo… 6.4 Higher Heating Value. The measurement of the higher heating value of natural gas, propane, or fuel oil shall be conducted on-site. Exception: bottled gas and a single test batch of fuel oil can be third-party certified by an independent test labo… 6.5 Water Flow. A flowmeter may be used in lieu of a weight tank and scale for determining water flow rate and quantity. Conversion to pounds of water, where required, shall be based upon the specific volume listed in the ASHRAE Handbook—Fundamenta… 6.5 Water Flow. A flowmeter may be used in lieu of a weight tank and scale for determining water flow rate and quantity. Conversion to pounds of water, where required, shall be based upon the specific volume listed in the ASHRAE Handbook—Fundamenta… 6.6 Smoke. Smoke-measuring instruments shall comply with requirements for smoke meters as outlined in ANSI/ ASTM D2156.3 6.6 Smoke. Smoke-measuring instruments shall comply with requirements for smoke meters as outlined in ANSI/ ASTM D2156.3 7. APPARATUS 7. APPARATUS 7.1 Test Platform. Free-standing equipment shall be placed on a plywood platform elevated about 4 in. (100 mm). If the water-heating equipment is not intended for installation on combustible flooring, suitable noncombustible material shall be placed … 7.1 Test Platform. Free-standing equipment shall be placed on a plywood platform elevated about 4 in. (100 mm). If the water-heating equipment is not intended for installation on combustible flooring, suitable noncombustible material shall be placed … 7.2 Water Piping 7.2 Water Piping 7.3 Thermocouple Installation 7.3 Thermocouple Installation |
| 8 | Figure 1 Vertical connections (top). Figure 1 Vertical connections (top). Figure 2 Vertical connections (bottom). Figure 2 Vertical connections (bottom). |
| 9 | Figure 3 Horizontal connections. Figure 3 Horizontal connections. Figure 4 Formation of recirculation loop. Figure 4 Formation of recirculation loop. |
| 10 | 7.4 Vent Requirements 7.4 Vent Requirements 7.5 Fuel or Energy Consumption Measurement. Install one or more instruments that measure, as appropriate, the quantity and rate of electrical energy, appropriate gas supply, and fuel oil consumed by the water-heating equipment. 7.5 Fuel or Energy Consumption Measurement. Install one or more instruments that measure, as appropriate, the quantity and rate of electrical energy, appropriate gas supply, and fuel oil consumed by the water-heating equipment. 7.6 Heat Pump Water Heater Components. If the manufacturer neither submits nor specifies the water pump to be used for the laboratory testing, then components meeting the following criteria shall be used. 7.6 Heat Pump Water Heater Components. If the manufacturer neither submits nor specifies the water pump to be used for the laboratory testing, then components meeting the following criteria shall be used. 7.7 Special Requirements for Heat Pump Water Heater Testing. Water-heating performance is evaluated as a function of entering condenser water temperature and entering evaporator air temperature. The Type IV test method shall be used for any heat pump… 7.7 Special Requirements for Heat Pump Water Heater Testing. Water-heating performance is evaluated as a function of entering condenser water temperature and entering evaporator air temperature. The Type IV test method shall be used for any heat pump… |
| 11 | Figure 5 Type IV heat pump water heater test configuration. Figure 5 Type IV heat pump water heater test configuration. |
| 12 | Figure 6 Type V heat pump water heater test configuration. Figure 6 Type V heat pump water heater test configuration. 8. METHODS OF TESTING 8. METHODS OF TESTING 8.1 General. The water-heating equipment shall be installed and operated in accordance with the manufacturer’s instructions unless specifically required otherwise by the test method. The water-heating equipment shall be equipped with the apparatus … 8.1 General. The water-heating equipment shall be installed and operated in accordance with the manufacturer’s instructions unless specifically required otherwise by the test method. The water-heating equipment shall be equipped with the apparatus … 8.2 Energy Supply 8.2 Energy Supply 8.3 Inlet and Supply Water Temperature and Pressure. The supply water temperature shall be 70°F ± 2°F (21°C ± 1°C) for Type I and Type II equipment and Type III equipment where a higher inlet water temperature is not specified by the manufactur… 8.3 Inlet and Supply Water Temperature and Pressure. The supply water temperature shall be 70°F ± 2°F (21°C ± 1°C) for Type I and Type II equipment and Type III equipment where a higher inlet water temperature is not specified by the manufactur… 8.4 Room Ambient Temperature. Maintain the ambient air dry-bulb temperature of the test room between 65°F and 90°F (18°C and 32°C), except as required for heat pump water heater testing in Section 9.4.1. 8.4 Room Ambient Temperature. Maintain the ambient air dry-bulb temperature of the test room between 65°F and 90°F (18°C and 32°C), except as required for heat pump water heater testing in Section 9.4.1. 8.5 Storage Capacity for Testing. Type I and Type V volume shall be determined with the six thermocouples (see Section 7.3.1) installed and with close-coupled shutoff valves on the inlet and outlet. Water shall be supplied at a temperature within the… 8.5 Storage Capacity for Testing. Type I and Type V volume shall be determined with the six thermocouples (see Section 7.3.1) installed and with close-coupled shutoff valves on the inlet and outlet. Water shall be supplied at a temperature within the… |
| 13 | 8.6 Power Input Adjustment 8.6 Power Input Adjustment 8.7 Water Temperature Control 8.7 Water Temperature Control 9. TEST PROCEDURES 9. TEST PROCEDURES 9.1 Thermal Efficiency. The following test methods apply to gas and oil-fired equipment and to electric resistance models that do not use immersion heating elements. Electric resistance models that utilize only immersion heating elements shall use 0…. 9.1 Thermal Efficiency. The following test methods apply to gas and oil-fired equipment and to electric resistance models that do not use immersion heating elements. Electric resistance models that utilize only immersion heating elements shall use 0…. |
| 14 | 9.2 Standby Energy Consumption 9.2 Standby Energy Consumption 9.3 Heat Pump Water Heater Cooling Output. The space-cooling output of the heat pump water heater shall be measured using the indoor air enthalpy method as described in ANSI/ASHRAE Standard 37.4 Apparatus and instrumentation shall be configured as sp… 9.3 Heat Pump Water Heater Cooling Output. The space-cooling output of the heat pump water heater shall be measured using the indoor air enthalpy method as described in ANSI/ASHRAE Standard 37.4 Apparatus and instrumentation shall be configured as sp… 9.4 Heat Pump Water Heater Water-Heating Output. The water-heating capacity of the heat pump water heater shall be determined using test method Type IV or Type V, as applicable. 9.4 Heat Pump Water Heater Water-Heating Output. The water-heating capacity of the heat pump water heater shall be determined using test method Type IV or Type V, as applicable. |
| 15 | 10. CALCULATION OF RESULTS 10. CALCULATION OF RESULTS 10.1 Ratings for Models Not Tested. Where there is sufficient similarity in design between different models of Type I, Type II, or Type III water-heating equipment such that their differences will not significantly affect the performance, ratings for… 10.1 Ratings for Models Not Tested. Where there is sufficient similarity in design between different models of Type I, Type II, or Type III water-heating equipment such that their differences will not significantly affect the performance, ratings for… 10.2 Thermal Efficiency and Recovery Rating for Type I, Type II, and Type III Equipment 10.2 Thermal Efficiency and Recovery Rating for Type I, Type II, and Type III Equipment |
| 16 | 10.3 Heat Pump Water Heater Water-Heating Output and Coefficient of Performance (COP). The water-heating capacity and COP of Type IV and Type V heat pump water heaters are determined using data collected with the applicable test method at each set of… 10.3 Heat Pump Water Heater Water-Heating Output and Coefficient of Performance (COP). The water-heating capacity and COP of Type IV and Type V heat pump water heaters are determined using data collected with the applicable test method at each set of… |
| 17 | 10.4 Standby Energy Consumption 10.4 Standby Energy Consumption 11. REFERENCES 11. REFERENCES |
| 18 | Informative APPENDIX A— CORRECTION TO HEATING VALUE, H, FOR A FUEL GAS Informative APPENDIX A— CORRECTION TO HEATING VALUE, H, FOR A FUEL GAS A1. EXAMPLES A1. EXAMPLES Informative APPENDIX B— METHOD OF ESTIMATING ENERGY REQUIRED FOR HEATING A DAILY QUANTITY OF HOT WATER, U, IN GALLONS (LITERS) EXCLUSIVE OF DISTRIBUTION PIPING SYSTEM LOSSES Informative APPENDIX B— METHOD OF ESTIMATING ENERGY REQUIRED FOR HEATING A DAILY QUANTITY OF HOT WATER, U, IN GALLONS (LITERS) EXCLUSIVE OF DISTRIBUTION PIPING SYSTEM LOSSES B1. DAILY HOT WATER ENERGY REQUIRED B1. DAILY HOT WATER ENERGY REQUIRED |
| 19 | B2. HOURLY STORAGE ENERGY CONSUMPTION B2. HOURLY STORAGE ENERGY CONSUMPTION B2.1 For Type I Water-Heating Equipment B2.1 For Type I Water-Heating Equipment B2.2 For Type II Water-Heating Equipment B2.2 For Type II Water-Heating Equipment B2.3 For Type III Water-Heating Equipment B2.3 For Type III Water-Heating Equipment |
| 20 | B3. CALCULATE DAILY WATER HEATING ENERGY B3. CALCULATE DAILY WATER HEATING ENERGY B4. REFERENCES B4. REFERENCES |
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