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R-404a information – Scotsman CME1202 User Manual

Page 38

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VAPOR VAPOR

TEMP. PRES. TEMP. PRESS.

(DEG F) (PSIG) DEG F) (PSIG)

-20

17

70

146

-18

18

72

150

-16

20

74

155

-14

21

76

161

-12

23

78

166

-10

24

80

171

-8

26

82

177

-6

28

84

182

-4

29

86

188

-2

31

88

194

0

33

90

200

2

35

92

206

4

37

94

212

6

39

96

219

8

41

98

225

10

43

100

232

12

46

102

239

14

48

104

246

16

50

106

253

18

53

108

260

20

55

110

268

22

58

112

275

24

60

114

283

26

63

116

291

28

66

118

299

30

69

120

307

32

72

122

316

34

75

124

324

36

78

126

333

38

81

128

342

40

85

130

351

42

88

132

360

44

91

134

370

46

95

136

379

48

99

138

389

50

102

140

399

52

106

142

409

54

110

144

420

56

114

146

430

58

118

148

441

60

123

150

452

62

127

152

464

64

132

154

475

66

136

156

487

68

141

158

499

Pressure-Temperature Chart for HP62

This ice machine uses R-404A refrigerant and polyolester oil. Do NOT
use mineral oil in this refrigeration system.

••

R-404A is a "Near Azeotrope" so liquid charging is required: See the
next page.

••

When the system is serviced, a special liquid line drier is required. It is
included with replacement compressors.

••

HP62 is not compatible with mineral oil, so these ice machines use
Polyolester oil. Polyolester oil absorbs water very easily. When one of
these refrigeration systems is opened for service, it must be re-sealed
as soon as possible (15 minutes maximum).

••

Special leak detection equipment is required to locate small refrigerant
leaks. Usually a leak detector capable of detecting a Halongenated
refrigerant or HFC-134a will work. Check with the leak detector
manufacturer if in doubt.

Access Valves: To use the access valves:

••

Remove the cap from the stem, use a 3/16" allen wrench to check
that the valve is CLOSED. The remove the core cap.

••

Close the valve and replace the caps when the job is finished.
The valve must be closed and the caps must be on or the valve
will leak.

R-404A INFORMATION

Torque Stem Cap to

8-12 ft. lb.

Torque Stem to

6-8 ft. lb.

Torque

Core Cap to

7-12 ft. lb.

Access Valves

Note: There are no valve

cores in this valve.

Allen

Wrench

CME1202 & CME1402

January 1995

Page 30

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