York R-410A Operating manual

TECHNICAL SERVICE MANUAL

VARIABLE REFRIGERANT FLOW A/C SYSTEM

NONE MODULAR DIGITAL SCROLL R-410A 50 HZ

Read this manual before installation and operation

Make sure that it is well kept for later reference

Contents

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YDS None Modular Digital scroll

Contents

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Contents

Part 1 General Information……………………………………………….…………………………………..………4

1. YDS system series…………………………………………………………………….…….…………….……..…….6

What is YDS………………………………………………………………………………….…………….….…………6

Features of YDS ……………………………………………………………………….………….………........…….6

2. Nomenclatures…………………………………………………………………………..……………………………..15

Part 2 Units selection base on cooling load……………………………………………………………………..16

Part 3 Outdoor Units……………………………………………………………………………………………………26

1. Specifications……………………………………………………………………………………………………………28

2. Capacity table……….…………………………………………………………………….………………….……..…29

3. Dimensions and required installation space…………………..……………………….…………………….49

4. Piping diagram………………………………………………………………………………………………………….53

5. Noise level………………………………………………………………………………………………………………..57

6. Outdoor wiring diagram……………………………………………………………………………………………..59

7. Trouble shooting ………………………………………………………………...………….………….….…………61

8. Explode view and spare part list………………………………………………………………………………….64

Part 4 Indoor Units…………………………………………….………………………………………………………..78

1. Introduction………………………………………………………………………….…………………….…………….70

2. Four-way cassette type………………………………………………………………………………….………….71

3. Wall mounted type…………………………………………………………………………………………………..102

4. Ceiling &Floor type…………………………………………………………………………………………………..125

5. Medium static pressure type………………………………………………………..……………………...…....151

6. Expose and conceal floor standing………………………………………………………..………………......183

7. Hi ESP duct………………………..……………………………………………………..….………………………….220

Part 5 Installation……………………………………………………………………………………..…………………239

1. Summarize of Installation……………………………………………………………………………………………241

2. Installation of outdoor unit ……………………………………………………………………………………..…245

3. Installation of indoor unit …………………………………………………………………………………………..246

4. Installation of refrigerant pipe ……………………………………………………………………..…………….247

5. Processing & installation of drainage pipe……………………………………………………………………268

6. Insulation work…………….………...………..………………………….………………….………………………..271

7. Pipeline installation…………..………………………………………….……………………………………………274

8. Electric installation…………..………………………………………………….………….….….…………………278

Contents

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Part 6 Control System ………………………………………………………………………………………………...288

1. Control system………….….………….……...…………….……………………………………………..……….. ..290

2. Indoor unit central control monitor system …………..…………………………………………….………..301

3. Outdoor unit central monitor system…………………………………………………………………..………..319

4. 3rd intelligent network control & monitor system…………..…………………………………..…...…….325

5. Remote controller…………………………………………………………………………………………………......364

6. Receiver display………………………………………………………..…………………………….………………...381

General information

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Part I General Information

General information

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Contents

1. YDS system series………………………………………………………………………………………….….….…….6

What is YDS…………………………………………………………………………………………………….…………6

Features of YDS …………………………………………………………………………………….………....……….6

2. Nomenclatures…………………………………………………………………………………………………………..15

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)

General information

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c. This process controls the On/Off time of the valve and the rotating refrigerants in the

circle thus adjusting the capacity.

d. The cooling capacity of the outdoor units is adjusted automatically, according to the

number of operating indoor unit(s).

[3] PWM (Pulse Width Modulation) Valve

PWM valve is the valve to take away the fixed scroll by lifting up through the difference

of pressure after the digital scroll compressor being connected to the outlet and inlet of suction.

Therefore, the capacity of compressor is controlled automatically according to the operation

status such as loading when the valve is closed or unloading when the valve is opened. PWM

means the ON/OFF signal to the valve for loading /unloading.

General information

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(2) Multi matching with several indoor units

Outdoor units

Appearance Power supply Capacity(kW) Refrigerant Max. connectible

indoor units

1 Ph-220-240V-50Hz 10/14

3 Ph-380-415V-50Hz 10/14

R-410A 6/8

3 Ph-380-415V-50Hz 28 R-410A 16

General information

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Indoor Units

Capacity

YDS Product Refrigerant

2.2

2.8

3.6

4.5

5.6

7.1

8.0

9.0

11.2

14.0

28.0

Four-way Cassette (Compact)







Four-way Cassette



Wall mount



Wall mount (EXV Integrated)



Floor ceiling



Medium static Duct



Expose Floor standing



Conceal Floor standing

R-410A 50 Hz



Remark: This capacity table shows different refrigerant and different indoor units that are

available now.

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