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

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YDS None Modular Digital scroll

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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

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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

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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

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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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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.

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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

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Indoor Units
Capacity
YDS Product Refrigerant
2.2
kW
2.8
kW
3.6
kW
4.5
kW
5.6
kW
7.1
kW
8.0
kW
9.0
kW
11.2
kW
14.0
kW
28.0
kW
Four-way Cassette (Compact)
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Four-way Cassette
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Wall mount
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Wall mount (EXV Integrated)
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Floor ceiling
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Medium static Duct
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Expose Floor standing
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Conceal Floor standing
R-410A 50 Hz
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Remark: This capacity table shows different refrigerant and different indoor units that are
available now.

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(3) High efficiency
EER is up to 3.2.
(4) Long & single piping system
Digital scroll system is the only system that is free of oil separator and oil recycling
equipment. In the loading state, the speed of the refrigerant is enough to move oil back to the
compressor.
For 28Kw system, the maximum Pipe length between indoor unit and outdoor unit is
150m, the max. Height difference between indoor unit and outdoor unit is 50m, the max. Height
difference between indoor units is 15m.
For 10kw, 14kw system, the maximum Pipe length between indoor unit and outdoor unit
is 70m, the max. Height difference between indoor unit and outdoor unit is 20m, the max.
Height difference between indoor units is 8m.

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(5) Advanced oil return technology.
Combining the electronic control and the mechanical control, the oil level controller
keeps appropriate oil level in the compressor crankcase. Equipped with oil balance pipe and
low-pressure accumulator, it is applicable to both low-pressure & high-pressure oil cycling
system. Besides, with the innovative design of one-way valve and capillary, the system can
meet the continual oil level change of digital compressor and protect the compressor in whole
hog. The digital Scroll Compressor is in the state of loading or unloading. In the loading state,
the full speed operation of the compressor motor ensures the refrigerant has enough power to
bring the oil back to the compressor. In the unloading state, there is no oil moving out of since
there is no refrigerant output, the inertia of the refrigerant can also bring some oil back to the
compressor.
(6) Space saving

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(7) Simple installation and easy maintenance.
Easy installation
The structure of the YDS system and the piping work are simple, thus the installation is
easy.
Indoor units installation: Whole series indoor units have the same gas/liquid connection
size for R-410A ,and by flare nut connection, it is easy to connect and decrease your installation
cost up to 30%.
Independent system
The YDS system can be installed by stages and the owners can install their system at
their convenient time. Thus the system has less installation time limit.
- Installation by stages can avoid the non installment for the new project.
- Convenient installation is realized for the rebuilt project.
No need special maintenance work
Simple refrigerant piping system without any complicated maintenance work
Compared with the water-cooled system:
Without water-cooled system, there is no need to clean the water pipe
No full-time person is needed to do the maintenance work
Module construction enables the system to be free from large-scale repair regularly.

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(8) Flexible control system
Wireless remote control
Wired remote control
Individual indoor unit control
Individual indoor unit control & group indoor units control
Central control monitor Realize group control of multi-indoor units (Max:64 indoor units)
Intelligent Net-work Air-conditioner control& monitor System Realize intelligent network
control via
PC monitoring system (Max: 16 CCM, 1024 indoor units)

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(9) No electromagnetic disturbance.
YDS Digital Scroll II System causes no electromagnetic disturbance, since the loading and
unloading of compressor are merely mechanical movement. This special feature makes the
Digital Scroll System applicable to telecommunication companies, power stations, and all kinds
of precise science labs.

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2. Nomenclature
1 Configuration 2 Capacity 3 Type 4Fluid 5Power phase
YDS YORK Digital Scroll - XX x 100 W W Outdoor AR22 1220-240V-1-50Hz / 208-230V-1-60Hz
YDV YORK AC/DC
Inverter - E High wall Everest BR407C 2220-240V-3-50Hz / 200-230V-3-60Hz
H High wall EXV Integrated CR410A 3380-415V-3-50Hz / 460V-3-60Hz
F Floor Ceiling 4115V-1-60Hz
G 4-Way Cassette Compact
K 4-Way Cassette
Q 1-Way Cassette
R Conceal Floor standing
S Expose Floor standing
T Hi ESP Ducted
U Me ESP Ducted
V Low ESP Ducted
W Slim Me ESP Ducted
6 Power Hz 7 Expansion device (ID) 7 Generation 8 Optional
5 50 Hz E Not fixed on unit A First generation - - 2-Pipe system
6 60 Hz I Fixed on unit B Second generation 3 3-Pipe system
7 50/60 Hz C Third generation A Front intake
D Forth generation B Below intake
F Fifth generation
Example
YDS-280WC35A - York Digital Scroll Outdoor unit 28 kW, R-410A, 3 Ph 50 Hz, 1st generation
YDS-22KC15IA - York Digital Scroll Cassette type 2.2 kW, R-410A, 1 Ph 50 Hz, EXV. fixed on
unit, 1st generation

Unit selection base on cooling load
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Part 2 Unit selection base on cooling load

Unit selection base on cooling load
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Contents
1. Introduction ……………………………………………………………………………………….……………………18
2. Unit Selection (with cooling load)……………………………………………………………………….………18

Unit selection base on cooling load
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1. Introduction
Refrigerant Power supply Model Capacity (kW)
YDS-100WC15A 10
YDS-140WC35A 14
1 Ph-220-240V-50Hz
YDS-100WC35A 10
YDS-140WC35A 14
R-410A
3 Ph-380-415V-50Hz YDS-280WC35A 28
2. Unit selection (Based on Cooling Load)
2.1) Indoor unit selection
1. After calculated the heat load of rooms, according to the local weather parameter and
area, cubage, structure of rooms, selecting the nearest load capacity indoor units with given
load.
2. Selecting the proper indoor units should include the type of indoor units (Such as the
four-way cassette, duct and so on).
3. Pay attention to the requirements of customers and local corresponding design
standards.
CAUTION: The described capacity may be different from each indoor unit according to
combination. So the real capacity should be calculated with outdoor unit capacity table.
2.2) Outdoor unit selection
The allowable combination is described on the indoor combination total capacity index
table.
For the standard of the indoor unit and outdoor unit combination, select the nearest
value that the total indoor unit capacity index is less than 130% outdoor unit capacity index.
Indoor unit combination total capacity index.
Outdoor Units
Indoor unit combination
Outdoor Unit 130% 100% 90% 80% 70% 60% 50%
YDS-100WC15A 13 10(ISO) 9 8 7 6 5
YDS-140WA15A 18.2 14(ISO) 12.6 11.2 9.8 8.4 7
YDS-100WC35A 13 10(ISO) 9 8 7 6 5
YDS-140WC15A 18.2 14(ISO) 12.6 11.2 9.8 8.4 7
YDS-280WC35A 36.4 28(ISO) 25.2 22.4 19.6 16.8 14
Indoor units
Unit size 22 28 36 45 56 71 80 90 112 140 280
Capacity index (kW) 2.2 2.8 3.6 4.5 5.6 7.1 8.0 9.0 11.2 14.0 28.0

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2.3) Real function data
(1) Select the exact table according to outdoor unit model and combination rate using
outdoor unit capacity table. According to given indoor and outdoor temperature, find outdoor
unit capacity and power input using the table. Each indoor unit capacity (Power input) is
calculated as follows.
IUC=OUC × INX/TNX
IUC: Each indoor unit capacity
OUC: Outdoors unit capacity
INX: Each indoor unit capacity index
TNX: Total capacity index
(2) According to different pipe lengths and height difference, the indoor unit capacity will
change accordingly. If the changed capacity is smaller than load, replace it with a larger capacity
indoor unit and repeat the selecting progress.
2.4) Variation in capacity in accordance with the length of refrigerant piping.
(1) Cooling capacity modification
Effectual cooling capacity = Rated cooling capacity × Modification coefficient
= ([1] x [2] x [3] x [4])
[1] Modification coefficient of indoor W.B. temperature.
[2] Modification coefficient of outdoor D.B. temperature.