Lenox Elite Series, XC14 installation instructions 40ºF, SHº Superheat Values +/−5ºF

Page 27

START: Measure outdoor ambient temperature

40ºF

and

 

 

 

USE WEIGH-IN METHOD

 

 

ABOVE

 

 

 

Weigh-in or remove refrigerant

 

ABOVE or

 

based upon line length

39ºF and

BELOW

 

 

 

 

BELOW

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.

If refrigerant is REMOVED, retest to confirm that unit is properly charged.

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

4015 18 20 23 26 29 32 34 38 41 43 46 48 51

4513 16 18 21 24 27 30 33 36 39 41 44 46 49

5011 14 16 19 22 25 28 31 34 37 39 42 44 47

559 12 14 17 20 23 27 30 33 36 38 40 42 44

607 10 12 15 18 21 24 27 30 33 35 38 40 43

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

70

 

-

-

7

10

13

16

19

21

24

27

30

33

36

39

75

 

-

-

-

6

9

12

15

18

21

24

28

31

34

37

80

 

-

-

-

-

5

8

12

15

18

21

25

28

31

35

85

 

-

-

-

-

-

-

8

11

15

19

22

26

30

33

90

 

-

-

-

-

-

-

5

9

13

16

20

24

27

31

95

 

-

-

-

-

-

-

-

6

10

14

18

22

25

29

100

-

-

-

-

-

-

-

-

8

12

16

21

24

28

105

-

-

-

-

-

-

-

-

5

9

13

17

22

26

110

-

-

-

-

-

-

-

-

-

6

11

15

20

25

115

-

-

-

-

-

-

-

-

-

-

8

14

18

24

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

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.

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.

If value is LESS than shown, then REMOVE refrigerant.

MORE or

LESS

If value is MORE than shown, then ADD refrigerant.

If refrigerant is ADDED, retest to confirm that unit is properly charged.

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 27

XC14 SERIES

Image 27
Contents AIR Conditioner Table of ContentsGeneral Shipping and Packing ListUnit Dimensions − Inches mm Model Number Identification230 Plumbing and Switches Components Typical Unit Parts ArrangementControl Panel Torque Requirements Operating Gauge Set and Service ValvesUsing Manifold Gauge SET Operating Service ValvesReinstall Stem Cap Operating Angle Type Service ValveOperating Ball Type Service Valve To Access Service Port2CONNECT Manifold Gauge SET Recovering Refrigerant from Existing System1DISCONNECT Power Recovering RefrigerantPlacing Unit on Slab Unit PlacementClearance on ALL Sides Positioning ConsiderationsDetail E Deck Top Mounting Detail a Outside Unit PlacementDetail C Elevated Slab Mounting using Feet Extenders Detail D Slab Side MountingLouvered Panel Removal Removing and Installing PanelsLouvered Panel Installation Roof MountingNew or Replacement Line Set Refrigerant Line SETRefrigerant Line Set Refrigerant Line SET Alling Horizontal Runs Refrigerant Line SET From Vertical to HorizontalBrazing Connections 1CUT and Debur Brazing Procedures7PREPARATION for Next Step Wrap Service ValvesFlow Nitrogen 6BRAZE Line SETFlushing Line Set and Indoor Coil Installing Indoor Expansion ValveEqualizer Line Installation Installing Indoor Metering DeviceIndoor Expansion Valve Installation Sensing Bulb InstallationLeak Test Leak Test Line Set and Indoor CoilEvacuating System Evacuating Line Set and Indoor Coil24VAC Transformer Size Circuit and Install Disconnect2INSTALL Thermostat ElectricalVAC Control Wiring Diagrams Field Installed Typical Factory Wiring Diagram Interlink Compressor Typical Unit Wiring Diagram System Refrigerant Connections for Testing and ChargingServicing Units Delivered Void of Charge Unit Start−UpDevice? Determining Charge MethodWhich indoor MeteringCalculating System Charge for Outdoor Unit Void of Charge Checking AIR Flow AT Indoor CoilBelow AboveSHº Superheat Values +/−5ºF 40ºFSystem Operation Normal Operating Pressures Liquid +10 and Suction +5 psigUnit Components Unit Nameplate Actual MaintenanceIndoor Unit Indoor CoilState Start−Up and Performance ChecklistInstaller City Job Name Job no Date Job Location City

Elite Series, XC14 specifications

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