Lenox Air Conditioner Elite Series Manual do Utilizador descarregar pdf (Página 27)

Page 27

XC14 SERIES

START: Measure outdoor ambient temperature

NOTE − Do not attempt to charge system where a

dash appears, system could be overcharged.

Superheat is taken at suction line service port.

Suction line superheat must never be less than 5ºF

at the suction line service port.

USE WEIGH-IN METHOD

Weigh-in or remove refrigerant

based upon line length

SHº (Superheat) Values (+/−5ºF)

Wet Bulb (air entering indoor coil)

ºF* 50 52 54 56 58 60 62 64 66 68 70 72 74 76

40 15 18 20 23 26 29 32 34 38 41 43 46 48 51

45 13 16 18 21 24 27 30 33 36 39 41 44 46 49

50 11 14 16 19 22 25 28 31 34 37 39 42 44 47

55 9 12141720232730333638404244

60 7 10121518212427303335384043

65 - 6 10 13 16 19 21 24 27 30 33 36 38 41

70 - - 7 1013161921242730333639

75 - - - 6 9 121518212428313437

80 - - - - 5 8 12 15 18 21 25 28 31 35

85 - - - - - - 8 11 15 19 22 26 30 33

90 - - - - - - 5 9 131620242731

95 - - - - - - - 6 101418222529

100 --------81216212428

105 --------5913172226

110 ---------611152025

115 ----------8141824

* Dry−bulb temperature (ºF) of entering outdoor ambient air.

1. Confirm proper airflow across coil using figure 20.

2. Compare unit pressures with table 4, Normal

Operating Pressures.

3. Use SUPERHEAT to correctly charge unit or to

verify the charge is correct.

4. Set thermostat to call for heat (must have a cooling

load between 70-80ºF (21−26ºC)

5. Connect gauge set.

6. When heat demand is satisfied, set thermostat to

call for cooling.

7. Allow temperatures and pressures to stabilize.

8. Measure the suction line pressure and use the use

value to determine saturation temperature (table

3):

SATº =_________

9. Record suction line temperature:

VAPº =_________

10. Subtract to determine superheat (SHº):

VAPº − _____ SATº ______ = SHº______

11. Record the wet bulb temperature (air entering

indoor coil):

WB =_______

12. Record outdoor ambient temperature.

13. Compare results with table to the left.

If value is MORE

than shown, then

ADD refrigerant.

If value is LESS than

shown, then REMOVE

refrigerant.

If refrigerant is

REMOVED, retest to

confirm that unit is

properly charged.

MORE or

LESS

If refrigerant is

ADDED, retest to

confirm that unit is

properly charged.

ABOVE or

BELOW

39ºF and

BELOW

40ºF

and

ABOVE

Figure 24. Using HFC−410A Superheat (Fixed Orifice) Charge Method

Table 3. HFC−410A Temperature (°F) − Pressure (Psig)

°F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig

32 100.8 48 137.1 63 178.5 79 231.6 94 290.8 110 365.0

125 445.9

141 545.6

33 102.9 49 139.6 64 181.6 80 235.3 95 295.1 111 370.0 126 451.8 142 552.3

34 105.0 50 142.2 65 184.3 81 239.0 96 299.4 112 375.1 127 457.6 143 559.1

35 107.1 51 144.8 66 187.7 82 242.7 97 303.8 113 380.2 128 463.5 144 565.9

36 109.2 52 147.4 67 190.9 83 246.5 98 308.2 114 385.4 129 469.5 145 572.8

37 111.4 53 150.1 68 194.1 84 250.3 99 312.7 115 390.7 130 475.6 146 579.8

38 113.6 54 152.8 69 197.3 85 254.1 100 317.2 116 396.0 131 481.6 147 586.8

39 115.8 55 155.5 70 200.6 86 258.0 101 321.8 117 401.3 132 487.8 148 593.8

40 118.0 56 158.2 71 203.9 87 262.0 102 326.4 118 406.7 133 494.0 149 601.0

41 120.3 57 161.0 72 207.2 88 266.0 103 331.0 119 412.2 134 500.2 150 608.1

42 122.6 58 163.9 73 210.6 89 270.0 104 335.7 120 417.7 135 506.5 151 615.4

43 125.0 59 166.7 74 214.0 90 274.1 105 340.5 121 423.2 136 512.9 152 622.7

44 127.3 60 169.6 75 217.4 91 278.2 106 345.3 122 428.8 137 519.3 153 630.1

45 129.7 61 172.6 76 220.9 92 282.3 107 350.1 123 434.5 138 525.8 154 637.5

46 132.2 62 175.4 77 224.4 93 286.5 108 355.0 124 440.2 139 532.4 155 645.0

47 134.6 78 228.0 109 360.0 140 539.0

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Lenox Air Conditioner Elite Series Manual do Utilizador Página 27

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