York Floor Ceiling R-410A 50Hz Service Manual download pdf (Page 7)

General information

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1. YDS system series

1.1 What is YDS

The YDS (YORK Digital Scroll Air Conditioner) air conditioning system is operated by a

variable-capacity compressor and is accommodated by multiple evaporators (indoor units). It is

considered as the next-generation modular system with high efficiency air conditioning in the

world.

It has undoubtedly changed the face of cooling associated with high-storied buildings. It

provides a broad range of different applications for settings such as offices, hotels and schools.

With the advantage of easy installation and simple controlling system and so on, the YDS system

can meet the demands of the air conditioning market better.

1.2 Features of YDS

(1) Variable compressor

The world’s first PWM (Pulse Width Modulation) compressor controls the cooling and

heating capacity automatically according to the load.

Principle of the digital scroll compressor:

[1] Composition

The solenoid valve is installed for the compressor’s loading/ unloading between the upper

part of the fixed scroll and the suction pipe.

[2] Mechanism

a. When the solenoid valve is turned off, the fixed scroll is close to the orbiting (Loading).

b. When the solenoid valve is turned on, the fixed scroll is separated from the orbiting

scroll. (Unloading)

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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
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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
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- 154 155
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Part 5 Installation 240
- 240 241
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- 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 7

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