York Floor Ceiling R-410A 50Hz Service Manual download pdf (Page 262)

Installation

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♦Do the vacuum drying procedure (see the YDS refrigerant pipes vacuum drying in detail)

7) Close the nitrogen main valve.

8) Repeat the above operations.

9) After finishing flushing the liquid pipes, then flushing the gas pipes.

4.6.6 Refrigerant pipe Pressure Test

1. Adding pressure operation

(1) During pressure test, the valves on gas side and liquid side should be full-closed.

Because nitrogen may enter into the outdoor circulation system, strengthening the valves before

adding pressure operation.

(2) For every refrigerant system, add pressure slowly and orderly from gas and liquid side.

(3) And the gas used must be nitrogen. Carbon Dioxide will probably condense. And Oxygen

will probably cause explosion.

(4) The time must be over 24h in the third-phase of adding pressure.

(5) Sketch map of adding pressure.

2. Control diagram for adding pressure by stages0.

No. Phase (add pressure by stages) Standard

1 Add pressure 3.0kgf/cm

G for more than 3 minutes to check big leakage.

2 Add pressure 15.0kgf/cm

G for more than 3 minutes to check big leakage.

3 Add pressure 28.0kgf/cm

G for more than 24 hours to check small leakage.

No pressure

falling

1 2 ... 257 258 259 260 261 262 263 264 265 266 267 ... 384 385

TECHNICAL SERVICE MANUAL 1
Part I General Information 5
Contents 18
Part 3 Outdoor 27
YDS-100WC15/35 50
YDS-140WC15/35 50
A 624 1030 52
B 55 52
C 1030 52
Part 4.1 Four-way cassette 72
Piping: 8m (horizontal) 79
Notes: 80
YDS-28-80KC 230 170 89
YDS-90-140KC 300 190 89
Indoor unit H(mm) 90
YDS-28-80KC ≥260 90
YDS-90-140KC ≥300 90
YDS-22-56GC ≥280 90
- 100 101
- 101 102
Part 4.2 Wall Mounted 103
- 103 104
- 104 105
- 105 106
- 106 107
- 107 108
3. Capacity table 109
- 109 110
- 110 111
- 111 112
- 112 113
- 114 115
- 115 116
- 116 117
- 117 118
YDS-45-56EC/HC 119
- 119 120
- 120 121
- 121 122
- 122 123
- 123 124
- 124 125
- 125 126
- 126 127
- 127 128
- 128 129
- 129 130
- 130 131
- 131 132
- 132 133
- 133 134
- 134 135
- 135 136
- 136 137
- 137 138
- 138 139
- 139 140
- 140 141
- 141 142
- 142 143
- 143 144
- 144 145
- 145 146
- 146 147
- 147 148
- 148 149
- 149 150
- 150 151
Part 4.4 Medium ESP Duct 152
- 152 153
- 153 154
- 154 155
- 155 156
- 156 157
- 157 158
- 158 159
- 159 160
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- 162 163
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- 238 239
Part 5 Installation 240
- 240 241
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- 255 256
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- 263 264
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- 268 269
- 269 270
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- 271 272
- 272 273
- 273 274
- 275 276
- 276 277
- 277 278
- 278 279
- 279 280
Gr ounded wi r e 281
- 281 282
- 282 283
- 283 284
- 284 285
- 285 286
- 286 287
- 287 288
Part 6 Control System 289
- 289 290
- 290 291
- 292 293
- 293 294
- 295 296
- 298 299
- 299 300
- 300 301
- 301 302
- 302 303
- 303 304
- 304 305
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- 383 384
Form No. 035M00457-000 385
2009 Johnson Controls, Inc 385

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York Floor Ceiling R-410A 50Hz Service Manual Page 262

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