Reznor MAPS - A,B,C Users Manual Uživatelský manuál stáhnout pdf (Strana 10)

Form O-MAPSIII&IV Cabinets A/B/C, Page 10

R-410A Refrigerant R-410A Refrigerant R-410A Refrigerant R-410A Refrigerant R-410A Refrigerant

Pressure Temperature Pressure Temperature Pressure Temperature Pressure Temperature Pressure Temperature

PSI °F °C PSI °F °C PSI °F °C PSI °F °C PSI °F °C

1.8 -55 -48.3 49.5 1 -17.2 77.0 19 -7.2 112.2 37 2.8 218.2 75 23.9

4.3 -50 -45.6 50.9 2 -16.7 78.7 20 -6.7 114.4 38 3.3 235.9 80 26.7

7.0 -45 -42.8 52.2 3 -16.1 80.5 21 -6.1 116.7 39 3.9 254.6 85 29.4

10.1 -40 -40.0 53.6 4 -15.6 82.3 22 -5.6 118.9 40 4.4 274.3 90 32.2

13.5 -35 -37.2 55.0 5 -15.0 84.1 23 -5.0 121.2 41 5.0 295.0 95 35.0

17.2 -30 -34.4 56.4 6 -14.4 85.9 24 -4.4 123.6 42 5.6 316.9 100 37.8

21.4 -25 -31.7 57.9 7 -13.9 87.8 25 -3.9 125.9 43 6.1 339.9 105 40.6

25.9 -20 -28.9 59.3 8 -13.3 89.7 26 -3.3 128.3 44 6.7 364.1 110 43.3

27.8 -18 -27.8 60.8 9 -12.8 91.6 27 -2.8 130.7 45 7.2 389.6 115 46.1

29.7 -16 -26.7 62.3 10 -12.2 93.5 28 -2.2 133.2 46 7.8 416.4 120 48.9

31.8 -14 -25.6 63.9 11 -11.7 95.5 29 -1.7 135.6 47 8.3 444.5 125 51.7

33.9 -12 -24.4 65.4 12 -11.1 97.5 30 -1.1 138.2 48 8.9 474.0 130 54.4

36.1 -10 -23.3 67.0 13 -10.6 99.5 31 -0.6 140.7 49 9.4 505.0 135 57.2

38.4 -8 -22.2 68.6 14 -10.0 101.6 32 0.0 143.3 50 10.0 537.6 140 60.0

40.7 -6 -21.1 70.2 15 -9.4 103.6 33 0.6 156.6 55 12.8 571.7 145 62.8

43.1 -4 -20.0 71.9 16 -8.9 105.7 34 1.1 170.7 60 15.6 607.6 150 65.6

45.6 -2 -18.9 73.5 17 -8.3 107.9 35 1.7 185.7 65 18.3 645.2 155 68.3

48.2 0 -17.8 75.2 18 -7.8 110.0 36 2.2 201.5 70 21.1

3.0 Maintenance and Service Procedures (cont'd)

3.5 Check

Refrigerant

Pressure and

Temperatures

(cont'd)

Temperature/Pressure Conversion Chart

WARNING

Do not release refrigerant to the atmosphere. When adding or

removing refrigerant, the qualied technician must comply

with all national, state/province, and local laws.

Determine SUPERHEAT

Measure and record temperature (insulate probe from surrounding air temperature)

and pressure in the suction line at the compressor inlet.

STEP 1) Record Measurements: Temperature = _______°F (°C) and

Pressure = _______ psig

STEP 2) From Temperature/Pressure Conversion Chart (below), convert

Measured Pressure (STEP 1) to ________°F (°C)

STEP 3) Subtract Measured Temperature (STEP 1) from Temperature from

Conversion Table (STEP 2)

________°F (°C) - ________°F (°C) = ________°F (°C) degrees of

Superheat

Recommended superheat range is 8 to 12 degrees F (4.5 to 6.7

degrees C).

Typically, too much superheat indicates that the evaporator coil is undercharged.

Too little superheat typically indicates that the evaporator coil is overcharged and

may potentially ood liquid refrigerant to the compressor. To reduce the superheat,

adjust the thermal expansion valve by turning the adjusting stem counterclock-

wise. To increase the superheat, adjust the thermal expansion valve by turning the

adjusting stem clockwise.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 39 40

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