835964-UIM-A-0112

TABLE 2: R-410A Saturation Properties

TEMP. °F

PRESSURE

TEMP. °F

PRESSURE

TEMP. °F

PRESSURE

TEMP. °F

PRESSURE

TEMP. °F

PRESSURE

PSIG

PSIG

PSIG

PSIG

PSIG

 

 

 

 

 

45

130

60

170

75

217

90

274

105

341

46

132

61

173

76

221

91

278

106

345

47

135

62

176

77

224

92

282

107

350

48

137

63

179

78

228

93

287

108

355

49

140

64

182

79

232

94

291

109

360

50

142

65

185

80

235

95

295

110

365

51

145

66

188

81

239

96

299

111

370

52

147

67

191

82

243

97

304

112

375

53

150

68

194

83

247

98

308

113

380

54

153

69

197

84

250

99

313

114

385

55

156

70

201

85

254

100

317

115

391

56

158

71

204

86

258

101

322

116

396

57

161

72

207

87

262

102

326.

117

401

58

164

73

211

88

266

103

331

118

407

59

167

74

214

89

270

104

336

119

412

SECTION VIII: ELECTRICAL

CONNECTIONS

GENERAL INFORMATION & GROUNDING

Check the electrical supply to be sure that it meets the values specified on the unit nameplate and wiring label.

Power wiring, control (low voltage) wiring, disconnect switches and over current protection must be supplied by the installer. Wire size should be sized per NEC requirements.

All field wiring must USE COPPER CONDUCTORS ONLY and be in accordance with Local, National, Fire, Safety & Electrical Codes. This unit must be grounded with a separate ground wire in accor- dance with the above codes.

The complete connection diagram and schematic wiring label is located on the inside surface of the unit service access panel.

FIELD CONNECTIONS POWER WIRING

1.Install the proper size weatherproof disconnect switch outdoors and within sight of the unit.

2.Remove the screws at the top and sides of the corner cover. Slide corner cover down and remove from unit.

3.Run power wiring from the disconnect switch to the unit.

4.Route wires from disconnect through power wiring opening pro- vided and into the unit control box as shown in Figures 6 & 7.

5.Install the proper size time-delay fuses or circuit breaker, and make the power supply connections.

Contactor

Ground

 

 

Lug

 

 

Low

 

 

Voltage

 

 

Box

 

Dual

“Fingered”

Reversible High

Run/Fan

Capacitor

Bushing

Voltage Conduit Plate

 

 

 

FIGURE 6: Outdoor Unit Control Box (Single Phase)

 

Contactor

Ground

 

Lug

 

Low

 

Voltage

Fan

Box

Capacitor

“Fingered”

Reversible High

Bushing

Voltage Conduit Plate

FIGURE 7: Outdoor Unit Control Box (Three Phase)

Johnson Controls Unitary Products

7

Page 7
Image 7
Johnson Controls R-410A installation manual Section Viii Electrical Connections, General Information & Grounding

R-410A specifications

Johnson Controls R-410A is a widely recognized refrigerant in the HVAC industry, primarily used in air conditioning and heat pump applications. Known for its environmental benefits and efficiency, R-410A has risen to prominence as a reliable replacement for older refrigerants such as R-22, which are being phased out due to their harmful impact on the ozone layer.

One of the standout features of R-410A is its low impact on global warming potential, making it an environmentally-friendly choice. It is composed of a mixture of hydrofluorocarbons (HFCs), specifically difluoromethane (R-32) and pentafluoroethane (R-125). This blend allows for efficient heat transfer while minimizing harmful emissions, addressing the growing concerns over climate change.

Johnson Controls emphasizes the efficiency of R-410A systems, which can provide a highly effective cooling performance. They are designed to operate at higher pressures compared to R-22, allowing for more efficient heat exchange and better overall system performance. This results in greater energy efficiency ratings, contributing to lower electricity bills for consumers.

In terms of technology, R-410A systems often feature advanced compressor designs and enhanced coil configurations, which optimize the system’s performance. Johnson Controls integrates state-of-the-art variable speed technologies and smart controls that enhance responsiveness and adaptability to changing environmental conditions. These innovations not only improve thermal comfort but also reduce energy consumption, leading to a smaller carbon footprint.

Another significant characteristic of R-410A is its compatibility with various lubricants, which is crucial for maintaining system performance and longevity. Johnson Controls often utilizes specially formulated lubricants that work optimally with R-410A, ensuring reliable operation and reducing the risk of issues related to lubrication.

In summary, Johnson Controls R-410A is an important refrigerant characterized by its efficient, environmentally friendly properties and advanced technologies. Its application in modern HVAC systems provides users with excellent performance, substantial energy savings, and an effective solution for climate-conscious cooling. As the industry continues to evolve, R-410A remains a central player in the push toward more sustainable and efficient heating and cooling solutions.