Related Manuals for Daikin R-22
Summary of Contents for Daikin R-22
- Page 1 AG 31-011 Refrigerant Piping Design Guide TX valve in vertical pipe Sight Glass Solenoid Valve Liquid Line Distributor External Equalization Line Bulb Filter- Drier Suction Line...
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Page 2: Table Of Contents
The information contained within this guide represents the opinions and suggestions of Daikin Applied. Equipment, and the application of the equipment and system suggestions are offered by Daikin Applied as suggestions and guidelines only, and Daikin Applied does not assume responsibility for the performance of any system as a result of these suggestions. -
Page 3: Introduction
Using This Guide This Guide covers R-22, R-407C, R-410A, and R-134a used in commercial air conditioning systems. It does not apply to industrial refrigeration and/or Variable RefrigerantVolume (VRV) systems. Illustrations and figures are not to scale. -
Page 4: Refrigerant Piping
Several HVAC systems require field refrigeration piping to be The information contained in this Application Guide is based designed and installed on-site. on Chapter 2 of ASHRAE’s Refrigeration Handbook and Daikin Applied’s experience with this type of equipment. A properly Examples include: designed and installed refrigerant piping system should: •... -
Page 5: Refrigerant Piping Design Check List
Refrigerant Piping Design Check List The first step in refrigerant piping design is to gather product and jobsite information. A checklist for each is provided below. How this information is used will be explained throughout the rest of this guide. Product Information Jobsite Information •... -
Page 6: Typical Refrigerant Piping Layouts
Typical Refrigerant Piping Layouts This section shows several typical refrigerant piping layouts for commercial air conditioning. They will be used throughout this guide to illustrate piping design requirements. Figure 2 shows a condensing unit mounted on grade connected to a DX coilinstalled in a roof-mounted air-handling unit. 1. - Page 7 Figure 3 shows a roof-mounted air-cooled chiller with a remote evaporator inside the building. 1. There are two refrigeration circuits, each with a liquid line supplying liquid refrigerant from the condenser to a TX valve adjacent to the evaporator, and a suction line returning refrigerant gas from the evaporator to the suction connections of the compressor.
- Page 8 Figure 4 shows an indoor chiller with a remote air-cooled condenser on the roof. 1. The discharge gas line runs from the discharge side of the compressor to the inlet of the condenser. 2. The liquid line connects the outlet of the condenser to a TX valve at the evaporator.
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Page 9: Piping Design Basics
For example, many documents refer to acceptable pressure drop being 2°F (1.1°C) or about 3 PSI (20.7 kPa) for R-22. The same 3 PSI change in R-410A, results in a 1.2°F (0.7°C) change in temperature. Table 1: Temperature versus Pressure Drop... -
Page 10: Liquid Lines
Table 2: Pressure Drop in Liquid Lines by Refrigerant Refrigerant Pressure Drop PSI/ft (kPa/m) Riser R-22 0.5 (11.31) Sight Glass TX Valve R-407C 0.47 (10.63) -
Page 11: Suction Lines
Possible accessories for this system include: • A hot gas bypass port. This is a specialty fitting that integrates with the distributor – an auxiliary side connector (ASC). • A pump down solenoid valve. If a pump down is utilized, the solenoid valve will be located just before the TX valve, as close to the evaporator as possible. - Page 12 Figure 7: Remote Evaporator Piping Detail Slope in direction of the refrigerant flow Inverted trap only required if there are evaporators upstream Trap to protect TX valve from liquid line Figure 8: Suction Piping Details Compressor Above Coil No inverted trap Compressor Above Coil required if properly sloped...
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Page 13: Discharge Lines
Figure 9: Capacity and Performances versus Pressure Drop Approx. Effect of Gas Line Pressure Drops on R-22 Compressor Capacity & Power – Suction Line Approx. Effect of Gas Line Pressure Drops on R-22 Compressor Capacity & Power – Suction Line... -
Page 14: Discharge Line Piping Details
Discharge Line Piping Details Discharge lines carry both refrigerant vapor and oil. Since Figure 10: Discharge Line Piping Details refrigerant may condense during the OFF cycle, the piping should be designed to avoid liquid refrigerant and oil from Slope in flowing back into the compressor. -
Page 15: Multiple Refrigeration Circuits
Multiple Refrigeration Circuits For control and redundancy, many refrigeration systems Figure 11: DX Coils with Multiple Circuits include two or more refrigeration circuits. Each circuit must Refrigerant Refrigerant Refrigerant be kept separate and designed as if it were a single system. (In) (In) (In) -
Page 16: Sizing Refrigerant Lines
Sizing Refrigerant Lines Refrigerant Capacity Tables Appendix 2 (page 40) and Appendix 3 (page 59) provide refrigerant line sizes for commonly used refrigerants. There is data for suction, discharge, and liquid lines. Suction and discharge lines have data for 0.5, 1, and 2°F (0.28, 0.56, and 1.7°C) changes in saturated suction temperature (SST). -
Page 17: Equivalent Length For Refrigerant Lines
Equivalent Length for Refrigerant Lines Table 5 Table 6 on page 41 in Appendix 2 (page provide information for estimating equivalent lengths. The actual equivalent length is estimated by calculating the path length in feet (meters) that the piping will follow and adding the pressure drops of the fittings and/or accessories along that length. -
Page 18: How To Size Liquid Lines
TX Valve Liquid Line — Step 5 Using refrigerant property tables which can be found in Step 2 – Calculate Actual ∆T Appendix 2 of Daikin Applied’s Refrigerant Application Guide Saturated Pressure = Saturated Pressure – Total Pressure Drop Using Note #5 in the table, we can calculate the saturation (AG 31-007, see www.DaikinApplied.com) the saturated... - Page 19 How to Size Liquid Lines (continued) Step 7- Determine The Sub-cooling Required for Saturated Step 8- Determine the Required Sub-cooling for Proper Liquid at the TX Valve Operation The sub-cooling require to have saturated liquid at the TX 2.2°F is the amount of sub-cooling required to have saturated valve can be found by: liquid refrigerant at the TX valve.
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Page 20: Refrigerant Oil
Refrigerant Oil Suction Line Sizing In the DX refrigeration systems covered by this guide, some Suction lines contain gaseous refrigerant that moves oil along amount of compressor lubricating oil travels with the refrigerant the piping and back tothe compressor. Over-sizing suction throughout the piping system. -
Page 21: Oil Return In Suction And Discharge Risers
Oil Return in Suction and Discharge Risers Table 10 on page 45 through Table 18 on page 49 show Figure 14: Preferred Reduction Fittings for Risers minimum capacity oil return for suction and discharge risers. Install expander When unloading capability exists, risers should be checked in horizontal pipe to verify that the minimum capacity allows for acceptable oil return. - Page 22 Figure 15: Double Suction Riser Detail Figure 15 shows a double suction riser arrangement that is more common in refrigeration applications where suction Small diameter pipe pressure drops are more critical. Most modern air conditioning inverted trap not applications can be met without requiring a double suction required if pipe is properly sloped riser.
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Page 23: How To Size Suction Lines
How to Size Suction Lines Single Pipe Suction Line Riser Size the suction line with a single pipe riser and determine the Step 3 – Calculate the Actual ∆T pressure drop for the following air-cooled chiller with remote Using Note #5 in the Table 8, calculate the saturation evaporator:... - Page 24 Actual Length Actual Capacity Table Length Table Capacity ∆T = ∆T Actual Table Table Length Table Capacity 64.0 ft 50.0 Tons ∆T = 2°F = 1.2°F 64.0 ft 50.0 Tons Actual 100.0 ft 51.5 Tons Suction Line — Step 4 ∆T = 2°F = 1.2°F...
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Page 25: How To Size A Suction Line Double Riser
How to Size a Suction Line Double Riser Double Pipe Suction Line Riser Size a double suction riser for the following air-cooled chiller Step 3 – Correct for Actual Operating Conditions with remote evaporator. Sizing the pipe for full load requires a correction for the 120°F The system: (48.9°C) actual condenser temperature. -
Page 26: Discharge Line Sizing
Discharge line remote air-cooled condenser. inverted trap (can be replaced with a check valve) The system: • Uses R-22 • Has Type L copper pipe Discharge Discharge Line Line • Evaporator operates at 20°F (-6.7°C) Saturated Suction Temperature •... - Page 27 Discharge Line — Step 3 Actual Length Actual Capacity ∆T = ∆T Actual Table Table Length Table Capacity How to Size a Discharge Line (continued) 110.0 ft 250.0 Tons ∆T = 1°F = 0.86°F Actual 100.0 ft 287.0 Tons Step 4 – Calculate the Actual Pressure Drop Step 5 –...
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Page 28: Thermal Expansion Valves
Thermal Expansion Valves Expansion valves are used to modulate refrigerant flow to TX valves and distributors (common with air coils) should the evaporator. There are several types of expansion valves be installed in vertical pipes. If a TX valve with a distributor including: is installed in a horizontal pipe, there is a possibility that the liquid portion of the two-phase flow downstream of the TX... -
Page 29: Hot Gas Bypass
Sight Glass Solenoid Valve Valve Discharge Suction Line Line Auxiliary side Filter- connector (ASC) Drier introduces hot gas Evaporator into distributor * Refer to Daikin IM 914 for Micro-channel condensers. www.DaikinApplied.com AG 31-011 • REFRIGERANT PIPING DESIGN... -
Page 30: Hot Gas Bypass Line Sizing
Hot Gas Bypass Line Sizing Hot gas bypass valves must be sized for the difference between the minimum compressor capacity and the minimum system capacity. If the minimum system capacity is zero, then Hot gas piping should be sized using the discharge gas line the hot gas bypass valve should be sized for the minimum sizing tables found in Appendix 2 (page... - Page 31 Table 3: Hot Gas Bypass Valve Sizing Chart Direct Acting Discharge Bypass Valve Capacities (Tons) Capacities based on discharge temperatures 50°F above is entropic compression, 25°F superheat at the compressor, 10°F sub-cooling, and includes both the hot gas bypassed and liquid refrigerant for desuperheating, regardless of whether the liquid is fed through the system thermostatic expansion valves or an auxiliary desuperheating thermostatic expansion valve.
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Page 32: How To Size A Hot Gas Bypass Line
How to Size a Hot Gas Bypass Line Size the hot gas bypass line and valve for the following air Sizing the pipe for full load requires a correction for the 80°F conditioner with a fin tube condenser. (26.7°C) actual condenser temperature. Referring to the correction factors at the bottom of Table The system:... -
Page 33: Installation Details
An Discharge lines are generally uninsulated. They may be very example of this is the Daikin Applied RPS C-vintage Applied hot, in excess of 150°F (66°C), so insulation may be warranted Rooftop System. -
Page 34: Low Ambient Operation
Low Ambient Operation Refrigeration circuit components are sized for the most Fan Cycling and Fan Speed Control demanding application point. This is typically when the ambient temperature is high and the evaporator temperature Fan cycling and fan speed control are the most common is low. - Page 35 Figure 20: Typical Condenser Flood Back Arrangement Head Pressure Control Valve Condenser Coil Discharge Line Receiver Liquid Line www.DaikinApplied.com AG 31-011 • REFRIGERANT PIPING DESIGN...
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Page 36: Safety And The Environment
Safety and the Environment Refrigeration systems contain fluids under pressure at dangerous temperatures and pressures. Proper safety procedures must be followed to provide a system that is acceptable. ASHRAE Standard 15, Safety Code for Mechanical Refrigeration and ASME Standard B31.5, Refrigeration Piping should be followed. -
Page 37: Appendix 1 - Glossary
Appendix 1 — Glossary Accumulator (Suction): A device installed just before a Economizer (Refrigerant): A form of two stage refrigeration compressor in the suction line that is used to separate vapor cycle where the compressor has a port that allows refrigerant from liquid refrigerant and oil. - Page 38 Hot Gas Reheat: A method of reheating supply air after it Oil Separator: A vessel in a refrigeration circuit used to has been cooled by using a second coil down stream of the separate oil from refrigerant. They are usually in the discharge evaporator and passing discharge gas from the compressor line.
- Page 39 Suction Line: A refrigerant line that carries low pressure refrigerant vapor from the evaporator to the compressor. Superheated Vapor: A vapor that has been heated beyond the saturation condition resulting in increased temperature and enthalpy. This is done to make sure the refrigerant in the suction line entering the compressor is truly a vapor.
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Page 40: Appendix 2 - Refrigerant Piping Tables
Appendix 2 – Refrigerant Piping Tables (English Units) Table 4: Copper Tube Data Wall Working Pressure Diameter Surface Area Cross Section Weight Diameter ASTM B88 to 250°F Nominal Type Diameter Outside D, Inside D Outside Inside (ft²/ Metal Area Flow Area Annealed Drawn (inches) - Page 41 Table 5: Equivalent Length for Fittings (Feet) Smooth Elbows Smooth Bend Tee Connections Nominal Straight Through Flow 90° Long Tee Branch Diameter 90° Std 90° Street 45° Std 45° Street 180° Std Reduced Reduced Radius Flow Reduction 1-1/8 1-3/8 1-5/8 2-1/8 10.0 2-5/8...
- Page 42 Table 7: R-22 Refrigerant Line Sizing (Tons) Suction Discharge Liquid 0°F 20°F 40°F 0°F 20°F 40°F ∆T 2°F 1°F 0 .5°F 2°F 1°F 0 .5°F 2°F 1°F 0 .5°F 1°F 1°F 1°F 1°F vel = 100 fpm ∆p (PSI) 1 .60 0 .813...
- Page 43 3. ∆t = corresponding change in saturation temperature, 0.902 1.078 °F per 100 ft 0.834 1.156 4. Line capacity for other saturation temperatures ∆t and R-22 Sizing — Notes equivalent lengths L 0.55 Table L Actual ∆t R-22 Sizing — Notes Line Capacity = Table Capacity ×...
- Page 44 3. ∆t = corresponding change in saturation temperature, 0.889 1.096 °F per 100 ft 0.808 1.160 4. Line capacity for other saturation temperatures ∆t and R-22 Sizing — Notes equivalent lengths L 0.55 R-22 Sizing — Notes Table L Actual ∆t Line Capacity = Table Capacity ×...
- Page 45 3. ∆t = corresponding change in saturation temperature, 0.896 1.109 °F per 100 ft 0.824 1.182 4. Line capacity for other saturation temperatures ∆t and R-22 Sizing — Notes equivalent lengths L 0.55 R-22 Sizing — Notes Table L Actual ∆t Line Capacity = Table Capacity ×...
- Page 46 Table 11: R-22 Minimum Capacity for Suction Riser (Tons) Saturated Suction Suction Pipe O .D . (inches) Temp Temp 1-1/8 1-3/8 1-5/8 2-1/8 2-5/8 3-1/8 3-5/8 4-1/8 (°F) (°F) Area (in 0 .146 0 .233 0 .348 0 .484 0 .825 1 .256...
- Page 47 Table 13: R-410A Minimum Capacity For Suction Riser (Tons) Saturated Suction Suction Pipe O .D . (inches) Temp Temp 1-1/8 1-3/8 1-5/8 2-1/8 2-5/8 3-1/8 3-5/8 4-1/8 (°F) (°F) Area (in 0 .146 0 .233 0 .348 0 .484 0 .83 1 .26 1 .78 3 .094...
- Page 48 Table 15: R-22 Minimum Capacity For Discharge Riser (Tons) Saturated Discharge Pipe O .D . (in) Temp Gas Temp 1-1/8 1-3/8 1-5/8 2-1/8 2-5/8 3-1/8 3-5/8 4-1/8 (°F) (°F) Area (in 0 .146 0 .233 0 .348 0 .484 0 .825 1 .256...
- Page 49 Table 17: R-410A Minimum Capacity for Discharge Riser (Tons) Saturated Discharge Suction Pipe O .D . (inches) Temp Temp 1-1/8 1-3/8 1-5/8 2-1/8 2-5/8 3-1/8 3-5/8 4-1/8 (°F) (°F) Area (in 0 .146 0 .233 0 .348 0 .484 0 .83 1 .26 1 .78 3 .094...
- Page 50 Table 19: R-22 Refrigerant Charge Table 21: R-410A Refrigerant Charge (Lbs . per 100 Feet of Pipe) (Lbs . per 100 feet of Pipe) Discharge Discharge Suction Line Liquid Line Suction Line Liquid Line Line Line Line Size OD Flow Area...
- Page 51 Figure 21: R-22 Suction Gas Velocity Figure 21 is based on 40°F suction temperature and 105°F condensing temperature. For other conditions, apply correction factors from Table Table 23: R-22 Suction Gas Velocity Correction Factors Suction Temperature (°F) Cond Temp (°F) 1.63 1.48...
- Page 52 Figure 22: R-134a Suction Gas Velocity Figure 22 is based on 40°F suction temperature and 105°F condensing temperature. For other conditions, apply correction factors from Table Table 24: R-134a Suction Gas Velocity Correction Factors Suction Temperature (°F) Cond Temp (°F) 1.76 1.56 1.40...
- Page 53 Figure 23: R-410A Suction Gas Velocity Figure 23 is based on 40°F suction temperature and 105°F condensing temperature. For other conditions, apply correction factors from Table Table 25: R-410A Suction Gas Velocity Correction Factors Suction Temperature (°F) Cond Temp (°F) 1.60 1.45 1.31...
- Page 54 Figure 24: R-407C Suction Gas Velocity Figure 24 is based on 40°F suction temperature and 105°F condensing temperature. For other conditions, apply correction factors from Table Table 26: R-407C Suction Gas Velocity Correction Factors Suction Temperature (°F) Cond Temp (°F) 1.78 1.49 1.35...
- Page 55 Figure 25: R-22 Discharge Gas Velocity Figure 25 is based on 40°F suction temperature and 105°F condensing temperature. For other conditions, apply correction factors from Table Table 27: R-22 Discharge Gas Velocity Correction Factors Suction Temperature (°F) Cond Temp (°F) 1.20 1.23...
- Page 56 Figure 26: R-134a Discharge Gas Velocity Figure 26 is based on 40°F suction temperature and 105°F condensing temperature. For other conditions, apply correction factors from Table Table 28: R-134a Suction Gas Velocity Correction Factors Suction Temperature (°F) Cond Temp (°F) 1.23 1.26 1.29...
- Page 57 Figure 27: R-410A Discharge Gas Velocity Figure 27 is based on 40°F suction temperature and 105°F condensing temperature. For other conditions, apply correction factors from Table Table 29: R-410A Suction Gas Velocity Correction Factors Suction Temperature (°F) Cond Temp (°F) 1.13 1.17 1.20...
- Page 58 Figure 28: R-407C Discharge Gas Velocity Figure 28 is based on 40°F suction temperature and 105°F condensing temperature. For other conditions, apply correction factors from Table Table 30: R-407C Suction Gas Velocity Correction Factors Suction Temperature (°F) Cond Temp (°F) 1.17 1.20 1.23...
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Page 59: Appendix 3 - Refrigerant Piping Tables (Si)
Appendix 3 – Refrigerant Piping Tables (SI Units) Table 31: Copper Tube Data – SI Wall Surface Cross Diameter Weight Working Pressure ASTM B88 To 120°C Diameter Area Section Nominal Type Diameter Outside D, Insided Outside Inside Metal Area Flow Area Tube Annealed Drawn... - Page 60 Table 32: Equivalent Length for Fittings – SI Smooth Elbows Smooth Bend Tee Connections Nominal Straight Through Flow 90° Long Tee Branch Diameter 90° Std 90° Street 45° Std 45° Street 180° Std Reduced Reduced Radius Flow Reduction — — —...
- Page 61 Table 34: R-22 Refrigerant Line Sizing Table (kW) Suction Discharge Liquid -20°C -5°C 5°C -40°C -20°C 5°C ∆T (K/m) 0 .04 0 .02 0 .01 0 .04 0 .02 0 .01 0 .04 0 .02 0 .01 0 .02 0 .02 0 .02...
- Page 62 1.120 0.856 3. ∆t = corresponding change in saturation temperature, K/m 0.888 1.110 4. Line capacity for other saturation temperatures ∆t and R-22 Sizing — Notes equivalent lengths L 0.55 R-22 Sizing — Notes Table L Actual ∆t Line Capacity = Table Capacity ×...
- Page 63 1.000 1.000 3. ∆t = corresponding change in saturation temperature, K/m 0.867 1.117 4. Line capacity for other saturation temperatures ∆t and R-22 Sizing — Notes equivalent lengths L 0.55 R-22 Sizing — Notes Table L Actual ∆t Line Capacity = Table Capacity ×...
- Page 64 1.000 1.000 3. ∆t = corresponding change in saturation temperature, K/m 0.891 1.133 4. Line capacity for other saturation temperatures ∆t and R-22 Sizing — Notes equivalent lengths L 0.55 R-22 Sizing — Notes Table L Actual ∆t Line Capacity = Table Capacity ×...
- Page 65 Table 38: R-22 Minimum Capacity for Suction Riser (kW) Saturated Suction Suction Pipe O .D . (mm) Temp Temp (°C) (°C) 0.182 0.334 0.561 0.956 1.817 3.223 5.203 9.977 14.258 26.155 53.963 93.419 0.173 0.317 0.532 0.907 1.723 3.057 4.936 9.464...
- Page 66 Table 40: R-410A Minimum Capacity For Suction Riser (kW) Saturated Suction Suction Pipe O .D . (mm) Temp Temp (°C) (°C) 0.586 1.113 1.905 2.93 5.86 10.26 16.1 33.70 60.36 93.8 140.6 196.3 0.674 1.275 2.344 3.37 6.89 12.0 18.8 38.97 68.86 108.4...
- Page 67 Table 42: Minimum Capacity For Discharge Riser (kW) Saturated Discharge Discharge Pipe O .D . (mm) Gas Temp Temp (°C) (°C) 0.563 0.032 0.735 2.956 5.619 9.969 16.094 30.859 43.377 80.897 116.904 288.938 0.5494 1.006 1.691 2.881 5.477 9.717 15.687 30.078 52.027 48.851...
- Page 68 Table 44: R-410A minimum Capacity For Discharge Riser (kW) Saturated Discharge Pipe O .D . Suction Temp (mm) Temp (°C) (°C) 1.160 2.15 3.727 5.590 11.2 19.5 30.8 48.5 85.79 136.8 203.2 287.3 1.195 2.21 3.839 5.758 11.6 20.1 31.7 49.9 88.36 140.9...
- Page 69 Table 46: R-22 Refrigerant Charge – SI Table 48: R-410A Refrigerant Charge – SI Kg per 30 .5 Meters of Pipe Kg per 30 .5 Meters of Pipe Suction Liquid Discharge Suction Liquid Discharge Line Line Line Line Line Line...
- Page 70 Figure 29: R-22 Suction Gas Velocity – SI Figure 29 is based on 4.4°C suction temperature and 41°C condensing temperature. For other conditions, apply correction factors from Table Table 50: R-22 Suction Gas Velocity Correction Factors – SI Suction Temperature (°C) Condenser Temp (°C) -12 .2 -9 .4...
- Page 71 Figure 30: R-134a Suction Gas Velocity – SI Figure 30 is based on 4.4°C suction temperature and 41°C condensing temperature. For other conditions, apply correction factors from Table Table 51: R-134a Suction Gas Velocity Correction Factors – SI Suction Temperature (°C) Condenser Temp (°C) -12 .2...
- Page 72 Figure 31: R-410A Suction Gas Velocity – SI Figure 31 is based on 4.4°C suction temperature and 41°C condensing temperature. For other conditions, apply correction factors from Table Table 52: R-410A Suction Gas Velocity Correction Factors – SI Suction Temperature (°C) Condenser Temp (°C) -12 .2...
- Page 73 Figure 32: R-407C Suction Gas Velocity – SI Figure 32 is based on 4.4°C suction temperature and 41°C condensing temperature. For other conditions, apply correction factors from Table Table 53: R-407C Suction Gas Velocity Correction Factors – SI Suction Temperature (°C) Condenser Temp (°C) -12 .2...
- Page 74 Figure 33: R-22 Discharge Gas Velocity – SI Figure 33 is based on 28°C discharge temperature and 5°C condensing temperature. For other conditions, apply correction factors from Table Table 54: R-22 Discharge Gas Velocity Correction Factors – SI Suction Temperature (°C) Condenser Temp (°C) 65 .6 71 .2...
- Page 75 Figure 34: R-134a Discharge Gas Velocity – SI Figure 34 is based on 28°C discharge temperature and 5°C condensing temperature. For other conditions, apply correction factors from Table Table 55: R-134a Discharge Gas Velocity Correction Factors – SI Suction Temperature (°C) Condenser Temp (°C) 65 .6...
- Page 76 Figure 35: R-410A Discharge Gas Velocity – SI Figure 35 is based on 28°C discharge temperature and 5°C condensing temperature. For other conditions, apply correction factors from Table Table 56: R-410A Discharge Gas Velocity Correction Factors – SI Suction Temperature (°C) Condenser Temp (°C) 65 .6...
- Page 77 Figure 36: R-407C Discharge Gas Velocity – SI Figure 36 is based on 28°C discharge temperature and 5°C condensing temperature. For other conditions, apply correction factors from Table Table 57: R-407C Discharge Gas Velocity Correction Factors – SI Suction Temperature (°C) Condenser Temp (°C) 65 .6...
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