18/61
ESI Outdoor Unit Installation Instruction
05.2018
Manufacturer reserves the right to change at any time for specifications or designs without notice and incurring obligations.
13.3 Sub-cooling charge
Refer to the following step to charge refrigerant by sub-cooling in cooling mode.
Model
2436
4860
Designed sub-
cooling degree
10
º
F(
±
2
º
F)
8
º
F(
±
2
º
F)
STEP1 Calculate superheat value on suction valve.
Measured suction pipe temperature = ___________
º
F
Measured suction pipe pressure = ___________PSIG
Calculate superheat value = ___________
º
F
STEP2 Calculate sub-cooling value on liquid valve.
Measured liquid pipe temperature = ____________
º
F
Measured liquid pipe pressure = ____________PSIG
Calculate sub-cooling value = ____________
º
F
Add refrigerant if calculated sub-cooling value is lower
than the designed one. Repeat the steps above.
Suction pipe
TEMP (ºF)
Final Superheat (ºF)
8
10
12
14
16
18
20
22
Suction Gage Pressure (PSIG)
40
101 97
93
89
86
82
78
75
42
105 101 97
93
89
86
82
78
44
110 105 101 97
93
89
86
82
46
114 110 105 101 97
93
89
86
48
118 114 110 105 101 97
93
89
50
123 118 114 110 105 101 97
93
52
128 123 118 114 110 105 101 97
54
133 128 123 118 114 110 105 101
56
138 133 128 123 118 114 110 105
58
143 138 133 128 123 118 114 110
60
148 143 138 133 128 123 118 114
62
153 148 143 138 133 128 123 118
64
159 153 148 143 138 133 128 123
66
164 159 153 148 143 138 133 128
68
170 164 159 153 148 143 138 133
70
176 170 164 159 153 148 143 138
72
182 176 170 164 159 153 148 143
Liquid pipe
TEMP (ºF)
Final Sub-cooling (ºF)
6
7
8
9
10
11
12
13
Liquid Gage Pressure (PSIG)
55
173 176 179 182 185 188 191 195
60
188 191 195 198 201 204 208 211
65
204 208 211 215 218 221 225 229
70
221 225 229 232 236 239 243 247
75
239 243 247 251 255 259 262 266
80
259 262 266 270 275 279 283 287
85
279 283 287 291 295 300 304 309
90
300 304 309 313 318 322 327 331
95
322 327 331 336 341 346 351 355
100
346 351 355 360 365 370 376 381
105
370 376 381 386 391 397 402 407
110
397 402 407 413 418 424 430 435
115
424 430 435 441 447 453 459 465
120
453 459 465 471 477 483 489 496
125
483 489 496 502 508 515 521 528
Figure 13-3 Measure the superheat or sub-cooling
Table 13-2 Superheat calculation on suction service valve
Table 13-4 Designed sub-cooling degree
Table 13-3 Sub-cooling calculation on liquid service valve