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Heatcraft Refrigeration Products H-ENGM0408 Operation & User’s Manual

Heatcraft Refrigeration Products H-ENGM0408 Manual Online:

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Heatcraft Refrigeration Products H-ENGM0408 User Manual
Heatcraft Refrigeration Products H-ENGM0408 User Guide
Heatcraft Refrigeration Products H-ENGM0408 Online Manual

Text of Heatcraft Refrigeration Products H-ENGM0408 User Guide:

  • Heatcraft Refrigeration Products H-ENGM0408, 25 Line Sizing The following Tables 22 through 24A on pages 25 through 30 indicate liquid lines and suction lines for all condensing units for R-22, R-404A, R-134a, and R-507. When determining the refrigerant line length, be sure to add an allowance for ttings. See Table 26 on page 31. Total equivalent length of refrigerant lines is the sum of the actual linear footage and the allowance for ttings. Table 22. Recommended Line Sizes for R-134a *

  • Heatcraft Refrigeration Products H-ENGM0408, 7 Refrigeration Load Estimate Form (for rooms above 32ºF) Bulletin Above32-05 Basis for Estimate Room Dimensions: Width ft. x Length ft. x Height ft. Volume: (L) x (W) x (H) = cu. ft. Ambient Temp ºF. (Corrected for sun load) — Room Temp ºF. = ºF. T.D. Product Load (a) lbs./day of to be reduced from entering temp. of

  • Heatcraft Refrigeration Products H-ENGM0408, 2 © 2008 Heatcraft Refrigeration Products LLC www.thecoldstandard.com www.coldyoucancounton.com Commercial Refrigeration Parts ™ History of High Performance, Innovation and Product Selection Larkin has been the most trusted brand of refrigeration products for clean environments since 1928. With its innovative products, it is uniquely qualied to meet the needs of foodservice applications as well as mission critical applications such as data centers. www.interlinkparts.com www.chandlerref.com www.larkinproducts.com Serving the Cold Storage Industry with Engineered Solutions Chandler has been a leading commercial refrigeration brand since 1933. Its emphasis on

  • Heatcraft Refrigeration Products H-ENGM0408, 14 Table 4 Average air changes per 24 hours for storage rooms above 32ºF. (0ºC.) due to door openings and inltration. Air Air Air Volume Changes Volume Changes Volume Changes Cu. Ft. Per 24hrs. Cu. Ft. Per 24hrs. Cu. Ft. Per 24hrs. 200 44.0 2,000 12.0 25,000 3.0 250 38.0 3,000 9.5 30,000 2.7 300 34.5 4,000 8.2 40,000 2.3 400 29.5 5,000 7.2 50,000 2.0 500 26.0 6,000 6.5 75,000 1.6 600 23.0 8,000 5.5 100,000 1.4 800 20.0 10,000 4.9 150,000 1.2 1,000 17.5 15,000 3.9 200,000 1.1 1,500 14.0 20,000 3.5 30

  • Heatcraft Refrigeration Products H-ENGM0408, 6 6. Hourly Heat Load The hourly heat load serves as the guide in selecting equipment. It is found by dividing the nal BTU/24 hour load by the desired condensing unit run time. 35ºF. rooms with no timer 16 hr. 35ºF. rooms with timer 18 hr. Blast coolers/Freezers with positive defrost 18 hr. Storage Freezers 18-20 hr. 25ºF. - 34ºF. coolers with hot gas or electric defrost 20-22 hr. 50ºF. rooms and higher with coil temperature above 32ºF. 20-22 hr. 7. Load Calculation Forms To simplify the calculation and tabulation of refrigeration loads, there are two forms available: Bullet

  • Heatcraft Refrigeration Products H-ENGM0408, 34 Table 29. Fahrenheit – Celsius Temperature Conversion Chart The number in bold type-face in the center column refers to the temperature, either Celsius or Fahrenheit, which is to be converted to the other scale. If converting Fahrenheit to Celsius the equivalent temperature will be found in the left column. If converting Celsius to Fahrenheit, the equivalent temperature will be found in the column on the right. Temperature Temperature Temperature Temperature Celsius

  • 9 Refrigeration Load Estimate Form (for rooms above 32ºF) Bulletin Above32-05 Basis for Estimate Room Dimensions: Width ft. x Length ft. x Height ft. Volume: (L) x (W) x (H) = cu. ft. Ambient Temp ºF. (Corrected for sun load) — Room Temp

  • Heatcraft Refrigeration Products H-ENGM0408, 23 Application T.D. Coil Notes Convenience Store 10 - 15ºF. Low Silhouette Multiple units for adequate air coverage Up to 18’ long = 1 coil Up to 30’ long = 2 coils Up to 40’ long = 3 coils Estimating guide: Cooler 100 SF/ton* Freezer 75 SF/ton* Holding Warehouse 10 - 15ºF. Medium or Forklift Operation Heavy Duty Average air changes Product load 10 - 15% of total load Estimating guide: 200 - 300 SF/ton Produce Warehouse 7 -10ºF. Low Velocity High seasonal loads Medium Heavy prod

  • Heatcraft Refrigeration Products H-ENGM0408, 40 Glossary of Refrigeration Terms 1. Accumulator - a shell placed in suction line for separating liquid refrigerant entrained in suction gas. 2. Air Changes - the amount of air leakage is sometimes computed by assuming a certain number of air changers per hour for each room, the number of changes assumed being dependent upon the type, use and location of the room. 3. Air Cooler, Forced Circulation - a factory-made encased assembly of elements by which heat is transferred from air to evaporating refrigerant. 4. Ambient Air - general

  • Heatcraft Refrigeration Products H-ENGM0408, 36 Table 32. English Conversion Factors & Data Table 33. English to Metric Conversion Factors To Convert Measurements From To Multiply By Cubic Feet Cubic Inches 1728 Cubic Inches Cubic Feet 0.00058 Cubic Feet Gallons 7.48 Gallons Cubic Feet 0.1337 Cubic Inches Gallons 0.00433 Gallons Cubic Inches 231 Barrels Gallons 42 Gallons Barrels 0.0238 Imperial Gallons U.S. Gallons 1.2009 U.S. Gallons Imperial Gallons 0.8326 Feet Inches 12 Inches Feet 0.0833 Square Feet Square Inches 144 Square Inches Square Fe

  • Heatcraft Refrigeration Products H-ENGM0408, 42 Tips for Quick Selection Guide Walk- In Cooler Box Load Parameter 1. 95ºF. ambient air temperature surrounding box. 2. 4” Styrene (R=16.7, K=0.24) walls/ceilling, 6” concrete slab oor. 3. Average product load with 5ºF. pull down in 24 hours. 4. BTUH load based on 16-18 hour compressor run time for 35ºF. box (timer recommended) +20 hours for 30ºF. box. 5. See Table C for adjustment to box load for glass doors. 6. For 80ºF. ambient temp. surrounding box, deduct 12%. 7. For 4” Urethane walls+ceiling, 6” concrete slab oor deduct 12%. 8. For 10’ ceiling height add 10%. 9. Fo

  • Heatcraft Refrigeration Products H-ENGM0408, 37 78.1 SR/lb dry air 7000 Use of the Psychrometric Chart From two known properties of air, its condition can be located on the Psychrometric chart and all remaining properties can then be found by reading the appropriate scale. Figure 1 Illustrates a condition plotted at the intersection of its dry bulb and wet bulb temperatures. The dry bulb temperature is represented on the chart by the vertical lines with its scale across the bottom. The wet bulb temperature is read along the saturation line and is represented on the chart by the solid

  • Heatcraft Refrigeration Products H-ENGM0408, 3 Tables 1. Wall heat loads 13 2. Insulated block K factors 13 3. Allowance for sun eect ............................................................................13 4. Average air changes per 24 hours for storage rooms above 32ºF. (0ºC.) due to door openings and inltration 14 5. Average air changes per 24 hours for storage rooms below 32ºF. (0ºC.) due to door openings and inltration 14 6. Heat removed in cooling air to storage room conditions (BTU per Cu. Ft.) 14 7. Storage requirements and properties of perishable products 15-16 8. Heat of respiration 17

  • Heatcraft Refrigeration Products H-ENGM0408, 22 Holding freezer 40 80 Packaged Holding center 40 80 Cutting Room 20 30 Meat Chill Room 80 120 Boxed Banana Ripening 120 200 Vegetables and Fruit Storage 30 60 Blast Freezer 150 300 Work Areas 20 30 Unpackaged Meat Storage 30 60 Recommended Number of Air Changes Type of Application Minimum Maximum -1,000 31.02 15.27 .0778

  • Heatcraft Refrigeration Products H-ENGM0408, 24 Baffle Glass Display Door Unit Cooler Recommended Coil Replacement Left Large cooler or freezer Right Large cooler or freezer Large cooler or freezer where one wall will not accommodate all required evaporators or where air-throw distance must be considered. Note: Always avoid placement of unit coolers directly above doors and door openings where low and normal temperature is being maintained. Allow sucient space between rear of unit cooler and wall to permit free return of air. Refer to unit manufacturers’ catalog for proper space. Always trap drain lines individually to prevent vapor migration. Traps on low temperature units must be outside of refrigerated enclosures. L

  • Heatcraft Refrigeration Products H-ENGM0408, 29 Table 24. Recommended Line Sizes for R-404A and R-507 * SUCTION LINE SIZE SUCTION TEMPERATURE SYSTEM +20˚F +10˚F -10˚F -20˚F CAPACITY Equivalent Lengths Equivalent Lengths Equivalent Lengths Equivalent BTU/H 25' 50' 75' 100' 150' 200' 25' 50' 75' 100' 150' 200' 25' 50' 75' 100' 150' 200' 25&a

  • 17 F R U I T S V E G E T A B L E S M I S C E L L A N E O U S Table 8 Heat of Respiration (Approx.) BTU / LB. / 24 Hrs. Storage Temperature Degree F. Product 32ºF. 40ºF. 60ºF. ºF. Other Apples 0.25 - 0.45 0.55 - 0.80 1.50 - 3.40 Apricots 0.55 - 0.63 0.70 - 1.00 2.33 - 3.74 Avocados — — 6.60 - 15.35 Bananas — — 2.30 - 2.75

  • 13 Insulation Insul. K Factor 6” 8” 10” 12” Air 4.65 6.94 6.65 6.50 6.40 Vermiculite .47 2.73 2.67 2.64 2.62 Sawdust .45 2.70 2.65 2.62 2.60 Cork .38 2.62 2.57 2.55 2.53 Rock Wool .30 2.52 2.49 2.47 2.45 Mac. Paper .28 2.50 2.46 2.45 2.43 Styrofoam .24 2.45 2.42 2.40 2.40 Polyurethane .16 2.3

  • Heatcraft Refrigeration Products H-ENGM0408, 28 Table 23A. Recommended Line Sizes for R-22 (continued) * SUCTION LINE SIZE LIQUID LINE SIZE SUCTION TEMPERATURE Receiver to 0˚F -10˚F -20˚F Expansion Valve SYSTEM Lengths Equivalent Lengths Equivalent Lengths Equivalent Lengths CAPACITY 100' 150' 200' 25' 50' 75' 100' 150' 200' 25' 50' 75' 100' 150' 200&apos

  • Heatcraft Refrigeration Products H-ENGM0408, 38 Appendix — Charts Low Temperature Psychrometric Chart (-40 to 50ºF.) Standard Atmospheric Pressure of 29.921 in HG Atmospheric Pressure at other altitude Altitude Pressure Ft. in HG -1000 31.02 -500 30.47 0 29.92 500 29.38 1000 28.86 2000 27.82 3000 26.83 4000 25.84 5000 24.90 6000 23.98 7000 23.09 8000 22.22 9000 21.39 10000 20.58 15000 16.89 Courtesy of ASHRAE — Reproduced by permission.

  • Heatcraft Refrigeration Products H-ENGM0408, 21 Refrigeration Equipment Selection General When the hourly BTU load has been determined, equipment can now be selected based on the information obtained in the initial job survey. Some of the factors aecting equipment selection are: 1. Equipment Balance 2. Temperature Dierence (T.D.) 3. Capacity Control/Product Safety 4. Type of Operation/Air Flow 1. Equipment Balance The condensing unit is generally selected rst to have capacity greater than the calculated cooling or freezing load. The unit cooler(s) must be selected to balance the capacity of the

  • Heatcraft Refrigeration Products H-ENGM0408, Commercial Refrigeration Cooling and Freezing Load Calculations and Reference Guide H-ENGM0408, April 2008 (Replaces H-ENGM0806, August 2006) Engineering Manual Head Pressure Control Valve Oil Separator Compressor Suction Accumulator Suction Filter Evaporator Condenser Liquid Line Solenoid Valve Liquid Line Sight Glass Receiver Heat Exchanger Filter- Drier Expansion Valve

  • 10 Refrigeration Load Estimate Form (for rooms below 32ºF) Bulletin Below32-05 Estimate for: Basis for Estimate Room Dimensions: Width ft. x Length ft. x Height ft. Volume: (L) x (W) x (H) = cu. ft. Ambient Temp ºF. (Corrected for sun load) — Roo

  • Heatcraft Refrigeration Products H-ENGM0408, 11 Refrigeration Load Estimate Form (for rooms below 32ºF) Bulletin Below32-05 Estimate for: Basis for Estimate Room Dimensions: Width ft. x Length ft. x Height ft. Volume: (L) x (W) x (H) = cu. ft. Ambient Temp ºF. (Corrected for sun load) — Room Temp. ºF. = ºF. T.D. Product Load (a) lbs./day of

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