York Floor Ceiling R-410A 50Hz Service Manual download pdf (Page 261)

Installation

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1) Install pressure modulation valve at the nitrogen cylinder. And the gas used must be

nitrogen. Carbon Dioxide will probably condense. And Oxygen will probably cause explosion.

2) Use charge pipe to connect pressure modulation valve and outdoor liquid pipe.

3) Jam well all the connection part in liquid side except indoor unit A.

4) Open the valve of nitrogen cylinder to 5kgf/cm2.

5) Check if there is nitrogen in liquid pipe of indoor unit A.

6) Flushing

♦Use the insulating material in hand to resist the nozzle of gas main pipe of the indoor

unit.

♦When the pressure can’t be resisted, release the insulating material quickly (flushing for

the first time), then use the insulating material to resist the nozzle again (flushing for the second

time).

♦The dunghill can be checked by putting a piece of cloth in the nozzle loosely. Occasionally,

some dampness can be found, please dry the pipe thoroughly. Do as follows:

♦ Scouring the inner part of the pipes with nitrogen until no dampness.

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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
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- 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
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- 238 239
Part 5 Installation 240
- 240 241
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- 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
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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 261

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