Service manual

REFRIGERATION SERVICE: R-404A
THIS ICE MACHINE USES R-404A (HP62)
REFRIGERANT AND POLYOLESTER
COMPRESSOR OIL.
DO NOT USE MINERAL OIL IN THIS
REFRIGERATION SYSTEM.
••HP62 is a "Near Azeotrope", and therefore
liquid charging is preferred.
••When the system is serviced, a special liquid
line dryer is required.
••Polyolester oil absorbs water very easily, and
therefore when the system 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 Halogenated
refrigerant or HFC-134A will work. Check with
the leak detector manufacturer if in doubt.
••As with any other refrigerant, do NOT mix HP62
with pressurized air when leak testing.
Pressure-Temperature Chart for HP62
VAPOR VAPOR
TEMP. PRESSURE TEMP. PRESSURE
(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
FME800R
August 1993
Page 35