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PENN Controls Products Catalog

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P70, P72 Approximate Low Pressure Settings for Typical Applications Description The settings in the following table represent approximate starting values. Actual values may vary widely, depending on application-specific guidelines. Low pressure settings for typical applications Table 156: P70, P72 approximate low pressure settings for typical applications Vacuum - in. Hg Pressure - psig 1 Refrigerant Approximate temperature °F R-12 R-22 R-502 R-717 R-134A Application Cut-out Cut-in Cut-out Cut-in Cut-out Cut-in Cut-out Cut-in Cut-out Cut-in Cut-out Cut-in Ice Cube Maker - Dry Type Coil -11 14 4 17 16 37 22 45 – – 2 15 Sweet Water Bath - Soda Fountain 20 31 21 29 43 56 52 66 33 45 18 26 Beer, Water, Milk Cooler, Wet Type 17 31 19 29 40 56 48 66 – – 16 26 Ice Cream Trucks, Hardening Rooms -16 10 2 15 13 34 18 41 5 24 0 13 Eutectic Plates, Ice Cream Truck -21 -11 1 4 11 16 16 22 4 8 1 2 Walk In, Defrost Cycle 9 37 14 34 32 64 40 75 23 55 12 32 Reach In, Defrost Cycle 20 39 19 36 40 68 48 78 30 57 16 36 Vegetable Display, Defrost Cycle 7 38 13 35 30 66 38 77 – – 10 34 Vegetable Display Case - Open Type 12 45 16 42 35 77 44 89 – – 14 40 Beverage Cooler, Blower Dry Type 11 37 15 34 34 64 42 75 24 55 12 32 Retail Florist - Blower Coil 29 45 28 42 55 77 65 89 44 67 26 40 Meat Display Case - Defrost Cycle 19 38 17 35 37 66 45 77 – – 15 34 Meat Display Case - Open Type 4 28 11 27 27 53 35 63 – – 8 25 Dairy Case - Open Type 2 38 10 35 26 66 33 77 – – 16 34 Frozen Food - Open Type -32 -9 7 5 4 17 8 24 – – 10 3 1 Conversion factor: 1 psig = 6.9 kPa 133

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