R407a was developed as a close match to r22s capacities and flow rates, making it well suited as an energy efficient retrofit for r22 in medium and low temperature refrigeration systems for supermarket. Refrigerant line sizes for remote systems revised 61699. Split system refrigerant piping guide united coolair. F ft btuh, f ft ton, c m btuh, c m ton, c m w, c m kw. Small handoperated pumps are available which permit insertion of a tube into the compressor suction line. Liquid line sizing for heat pumps is currently limited to 38. The program eliminates all the tedious calculations necessary when piping is sized manually and automatically corrects for all system operating conditions. Dhex is a software tool that is made to demonstrate the chemical design calculations of double pipe hairpin heat exchangers. Zeotropic blend designed to serve as a replacement for r404a in supermarket refrigeration retrofits or new systems. Check with the compressor manufacturer for any recommendations they may.
R407a, r407f, r448a and r449a have other density and mass flow than r404a r507. Cofounder and vp of service at kalos services, bryan has been involved in hvac training for over years. Line sizing every splitsystem unit is shippe d with a factorymounted sweat fitting. Maximum equivalent line length in feet 25 50 75 100 150 18,000 1. The correct pipe sizes help to ensure proper oil return and low pressure drop. Common applications include supermarket refrigeration, refrigerated transports, and food. Figure 4 indoor chiller with remote aircooled condenser liquid line riser discharge line chiller tx valve sight glass. Temperature and pressure chart for refrigerants r22, r410a, r12, r4a, r401a, r409a, r502, r404a, r507a, r408a and r402a. Zf scroll refrigeration compressors with r407af, r448a, r449a. The hot gas bypass line on the circuit runs from the discharge line of the compressor to the liquid line connection at the evaporator. International journal of refrigeration sciencedirect. The vapors are heavier than air and can cause asphyxiation.
Generally, the suction line is sized for a minimum pressure drop through the line and a minimum velocity in order to ensure good oil return to the compressor. To zoom in, use the keyboard to focus on the arrow icon within the product image. R407a is an hfc blend that is suitable for use in low and medium temperature refrigeration applications, such as those used in commercial refrigeration. In the select software the value of the liquid temperature tlo is provided along with. Split system refrigerant piping guide r410a refrigerant subject to change without notice. It is strictly forbiden to copy this software in any other server or internet location. Suction line sizing the line sizing charts on each case specification sheet can be used to size the subfeed branch lines. After my last post, i received this comment from bruce porter senior manager of field service for upg johnson controls. February, 2015, comparing solstice n40 r 448a with r449a as well as other r404a replacements, are shown below. Common applications include supermarket refrigeration, refrigerated transports, and food processing. Pressure drop across liquid line accessories such as a solenoid valve and filterdrier. It is a zeotropic blend of difluoromethane hfc32, pentafluoroethane hfc125 and 1,1,1,2tetrafluoroethane hfc4a. Refrigerant piping design carrier commercial systems.
The refrigerant piping design program will select pipe size based on a specified maximum pressure drop in the line and compute minimum required capacity for oil entrainment in risers. In most cases, using the larger line choice gives you the best scenario for the application as long as you can maintain enough velocity to get the oil back to the compressor. Gasco 103lr407a r407a calibration gas in a 103 liter cylinder connection c10. Static pressure loss gain due to the vertical lift drop of the liquid line. Zf refrigeration scroll compressors using r407a, r407f, r448a or r449a in low. R407a, r407f, r448a, r449a have other pipe sizing be checked to determine that pr refrigerant. This sofware and its documentation is only available for online use by the users. A system is installed with 200 equivalent ft of line set. Genetron performaxtm lt, r407f thermodynamic properties. A well laid out software is available for refrigeration pipe sizing from solvay fluor gmbh. Refrigerant line sizes for remote systems revised 6. Suction lines use table 3 through table 6 to properly size suction lines. Results from bitzer calculation software, version 6.
Liquid line open this chart hot gas line open this chart table 1 open this chart for more information about water chiller refrigerant line sizing for remote aircooled condensers call the advantage sales department at 3178870729. The content of this software aswell as all the included documentation is protected by and owned by calcooling andor our suppliers, customers or collaborators. Checking pipe sizing will confirm that capacity and efficient oil return are not being negatively affected. If the mbh load placed on the suction line is less than the number listed under suct riser, reduce riser by one line size. For compressors with an access port, the same handoperated pump can be used to remove lubricant without removing the compressor from the system. The discharge gas line runs from the discharge side of the compressor to the inlet of the condenser. From the 1947 launch of the catchall, the worlds first molded core filterdrier, to todays intricate electronic valve and controller packages, for over 80 years sporlan has set the industry standard for the development and manufacture of leading edge hvacr components. It is recommended that pipe sizing be checked to determine that pressure drops and velocities would be acceptable with the new refrigerant. Forane 404a, r404a, pressure temperature chart, pt chart, hvac, refrigeration, air conditioning, refrigerant gas created date. Line sizes are calculated at rated full load system capacity. This is a simple, yet powerful little application for sizing refrigerant piping for many different refrigerants. When sizing the heating piston for installations where the outdoor unit is below the indoor unit, use table 12. It is an ideal retrofit solution for many existing r404a systems, offering a substantially lower carbon footprint due to its lower gwp, and improved energy efficiency. Refrigerant piping design carrier commercial systems north.
Horizontal suction lines should slope 12 per 10 toward the compressor to aid in good oil. Cc072603 1012 0515 e refrigerant changeover from hfc. If the pipe chosen is too large, the velocity of the refrigerant flow will be reduced. Table of contents 2018 ashrae handbookrefrigeration. Line sizes are expressed in outside diameter of type l copper tubing. R407a, r407f, r448a, r449a are blend include bubble and dew point data. For split systems, interconnecting refrigerant lines should be sized to match the factory supplied fittings unless the application dictates different line sizes due to pressure drop. Applications department recommendations are listed on the system summary sheet furnished if requested with the job. Jun 19, 20 this chart is a rule of thumb for sizing and the key is to keep the percentage loss as low as possible and still maintain over fpm in the entire line set. Incorrectly sizing the suction line can lead to oil return problems or a reduction in the systems. Refrigerant pipe sizing pdf this application guide was created for design engineers and service technicians to demonstrate how to size refrigerant piping. Suction line 700 to 4000 fpm discharge line 500 to 3500 fpm condenser drain line.
All selections are based on a maximum of 65f return gas entering the compressor and a refrigerant condensing and liquid line temperature of 105f. A theoretical vapor compression cycle analysis has been done using the recent refrigerant property data. R407f is a hfc refrigerant and a poe lubricant will be required. Older r22 systems may contain a mineral or alkyl benzene based lubricant that is not compatible with hfcs like r407f. Of the major sections of pipe, the suction line is the most critical to size properly. Refrigeration line sizer for r404a, english units 73. This calculator uses the wolf and pate 2002 correlation. The line sizes given on the specification sheets are based on a 5 pound pressure drop for the entire piping run, from 50 to 250. For split systems, interconnecting refrigerant lines should be. The oilrefrigerant calculations have been carried out using new data for the solubility of klea 407a.
Once it receives focus, use the arrow keys on the keyboard to move and position the product image. Pressure drop across a refrigerant distributor if used. It is shipped as a liquid under its own vapor pressure. Thermostatic expansion valves with selective thermostatic charges april 2011 bulletin 1010. Since the refrigerant is in a gaseous state in the suction line, it does not mix well with the refrigerant oil. Incorrectly sizing the suction line can lead to oil return problems or a reduction in the systems capacity. In keeping with industry standards, the refrigerant piping design program calculations are based on procedures outlined in the ashrae refrigeration handbook.
When outdoor unit is located above indoor unit, use table 15. If you find this website valuable and appreciate it is open and free for everybody please contribute by. Both refrigerants are compared at the conditions of the middle evaporating temperature of. For use on refrigeration andor air conditioning systems only bulletin 2010, november 1999 supersedes bulletin 2010, june 1975 and all prior publications. Gasco r407a 105esr407a 901 ppm refrigerant r125 pentafluoroethane, 1039 ppm refrigerant r32 difluoromethane, 1060 ppm refrigerant r4a tetrafloroethane, balance nitrogen contained 105 cylinder with a c10 connection. A well laid out software is available for refrigeration pipe sizing from solvay fluor gmbh, hannover, germany. Sporlan thermostatic expansion valves for use on refrigeration andor air conditioning systems only bulletin 1010, april 2011 supersedes bulletin 1010, october 2009 and all prior publications. Problem a simple sizing chart is needed for use by installation and service technicians and system designers.
I need charts for piping sizing for r407 you are all over the board and you must be blindeek. A sporlan refrigerant distributor for most requirements thoroughly engineered, continually improved and laboratory and field tested for over 50 years. F liquid vapor c f liquid vapor c f liquid vapor c f liquid vapor c49 0. Toxic gases can be produced in fires involving this material. This may be as small as 58 example service meat cases, or as large as 8 example multishelf ice cream cases. Hello i am looking for a chart that will give me the line sizing from different pressure drop and temperature from the lbsmin of the hfc refrigerant r4a, r404a, r410a. Cond unit suction line sizes capacity at system evaporator design temperature. Refrigerant pipe sizing software free download refrigerant. Long line applications guideline r 410a split systems. It is essential that blend refrigerants, like r407a, r407f, r448a and r449a be. Sorry to see that you are blocking ads on the engineering toolbox. R407a, r407f, r448a and r449a have other density and mass flow than r404ar507. Cooling calculator for cold rooms, selection and calculation of cooling units, condensing units, evaporating units.
Okay hopefully ive made my point that the two factors suction line pressure loss and suction line velocity are the most important parts of sizing suction lines for any air conditioning system either residential of commercial. Forane 407a is a lower gwp refrigerant, designed for the replacement of r404a and r507a retrofit and new equipment in medium and low temperature refrigeration. The design of refrigerant piping systems involves capacity. Suction line 2f, 750 fpm horizontal, 1500 fpm suction riser, 4000 fpm pitched 12 per 100 ft. Saturation pressuretemperature data for r407a psig pressure pressure pressure pressure. The program contains data for three common refrigerants r22, r4a, and r717 permitting comfort cooling as well as low temperature applications to be examined. Also, refer to the line sizing charts in these instructions.
R22, r4a, r404a, r407a, r407c, r407f, r410a, r448a, r449a, r450a, r454c, r455a, r507a, r5a, r744 co2, r1234yf, r1234ze. Aioflo performs pipe sizing, flow rate and pressure drop calculations for liquids and gases. See documented operating envelopes in the compressor technical data select software. The software will do all the thermal calculations involved in the design and will generate a summary of all resultsetc. The liquid line connects the outlet of the condenser to a tx valve at the evaporator. Future updates are planned to include alternate liquid line sizing for heat pump applications. Acceptable suction line sizes are are shown for each size and type system. Basic air conditioning piping recommendations suction.
The zoom feature provides no benefit to users who are blind. Refrigerant pipe sizes in a typical supermarket system consist of the compressor discharge, condenser return, and individual circuit liquid and suction pipes. Forane 407a r407a is a nonozone depleting, zeotropic blend of hfc refrigerants r32, r125, and r4a. Web basedruns through your browser select air coolers based on design requirements and let the software pick the unit that meets your most. Saravel refrigerant pipe sizing program designed by saravel corp.
R407a is a mixture of gasses used as a refrigerant. Aug 29, 2001 incorrectly sizing the suction line can lead to oil return problems or a reduction in the systems capacity. Basic air conditioning piping recommendations suction lines. Such as the old asrhae rp 185 book and refrigerant line sizing r22. Revised 61699 r12, r22, r502, r4a, and r404a commercial refrigeration page 3 of 6. Bryan started hvac school to be free training hvacr across many mediums, for techs, by techs.
1470 578 694 86 1258 530 17 1661 200 1615 1285 659 1148 1282 1396 205 915 759 31 1521 254 20 207 78 1137 733 976 1320 1463 559 854 989 411 804 822 1309 1367