KStar FocusAir FS012 Series User manual

425684432205D
User Manual
Precision Air Conditioner

Preface-About the product and manual
[To users]
Dear users! Thank you for purchasing our precision air conditioner! To ensure better use, please
read this manual carefully before using it and ensure correct use and operation in order to achieve a
lasting and reliable operation effect.
[Warranty]
This product is covered by our maintenance service with the purchase contract or relevant
approved procedures.
[Exception clauses]
1. Free warranty period expires;
2. Disassembly or modification of the product without authorization;
3. Violation of product operation or use specifications;
4. Man-made failures;
5. Losses caused by force majeure or other external factors at client site.
[Note: Any of the above exemption clauses will not be covered by the warranty.]
[Customer service]
Shenzhen Kstar Science & Technology Co., Ltd. provides customers with a full range of technical
support. You can contact local Kstar office, customer service center or technical department.
[Related description]
1. This manual is provided with the product. Please keep it properly for future reference. If this
manual is lost or damaged, please request it directly from the manufacturer;
2. This manual is written for direct expansion air-cooled series products. The content may not be
applicable to other models;
3. The copyright of this manual belongs to Shenzhen Kstar Science & Technology Co., Ltd. All
rights are reserved. The content is subject to change without notice.

Contents
Chapter 1 Product Overview.................................................................................................................................................... 1
1.1 Introduction.............................................................................................................................................................. 1
1.2 Model Description ................................................................................................................................................... 2
1.3 Main Components.................................................................................................................................................... 2
1.4 Environmental Requirements................................................................................................................................... 5
Chapter 2 Mechanical Installation............................................................................................................................................ 7
2.1 Transportation Inspection ......................................................................................................................................... 7
2.2 Installation Precautions ............................................................................................................................................ 8
2.3 System Installation Layout....................................................................................................................................... 9
2.4 Installing Indoor Unit............................................................................................................................................. 14
2.5 Installing Unit Pipeline........................................................................................................................................... 20
2.6 Inspection Items for Installation............................................................................................................................. 29
Chapter 3 Electrical Installation............................................................................................................................................. 30
3.1 Wiring Content ...................................................................................................................................................... 30
3.2 Indoor Unit Wiring.................................................................................................................................................. 30
3.3 Outdoor Unit Wiring............................................................................................................................................... 35
3.4 Installation Check ................................................................................................................................................... 37
Chapter 4 Commissioning...................................................................................................................................................... 38
4.1 Electrical Layout.................................................................................................................................................... 38
4.2 Commissioning....................................................................................................................................................... 38
Chapter 5 Basic Operation ..................................................................................................................................................... 41
5.1 Overview................................................................................................................................................................. 41
5.2 Introduction to the Touch Screen............................................................................................................................ 41
5.3 Touch Screen Navigation........................................................................................................................................ 42
5.4 Basic Operation....................................................................................................................................................... 43
Chapter 6 Operation and Maintenance................................................................................................................................... 50
6.1 System Diagnosis and Test ..................................................................................................................................... 50
6.2 Maintenance of Fan Components............................................................................................................................ 51
6.3 Filter maintenance................................................................................................................................................... 54
6.4 Maintenance of Differential Pressure Switch.......................................................................................................... 55
6.5 Maintenance of Condensate Drain Pump (Optional) .............................................................................................. 55
6.6 Maintenance of Electric Heater (Optional) ............................................................................................................. 56
6.7 Wet Film Humidification Maintenance (Optional)................................................................................................. 59
6.8 Maintenance of Electrode Humidifier..................................................................................................................... 60
6.9 Refrigeration System Maintenance......................................................................................................................... 64
Chapter 7 Troubleshooting..................................................................................................................................................... 68
Attached Table 1 Maintenance and Inspection Items (Monthly)............................................................................................ 71
Attached Table 2 Maintenance and Inspection Items (Semi-annual)..................................................................................... 72
Appendix 1 Identification of Toxic and Hazardous Substances or Elements......................................................................... 73

Chapter 1 Product Overview 01
FocusAir Precision Air Conditioner User´s Manual
Chapter 1 Product Overview
FocusAir series precision air conditioners are professional equipment suitable for places that are not easily
accessible by the general public.
This chapter introduces the product model, main components, transportation and storage environment
requirements of the FocusAir series precision air conditioners.
1.1 Introduction
FocusAir series precision air conditioner is a control system for precision environment. It is suitable for
environmental control of small and medium-sized machine rooms, modular machine rooms, data centers using
micro-modules, cold/hot aisles, and machine rooms that require energy saving and high heat density.
Integrating the industry’s most advanced energy-saving and environmental protection technology and
combined with well-designed refrigeration system and powerful and reliable automatic control system, it
guarantees the uninterrupted, efficient and reliable operation of key equipment throughout the year.
The cooling capacity range of FocusAir series precision air conditioners: 25~70kW.
The FocusAir series precision air conditioning unit consists of an indoor unit and an outdoor unit. For long
connecting pipes, extended components are available; for low-temperature outdoor conditions in winter,
cryogenic components are available; for northern areas, fluorine pump energy-saving modules are available.
Cooling capacity characteristics of FocusAir series precision air conditioners:
(1) Multiple air supply methods, multiple refrigeration types;
(2) Installation is possible with or without raised floor;
(3) Suitable for both newly built and reconstructed machine rooms;
(4) Allow installation in the middle or both sides of the cabinet row;
(5) Support upper and lower pipe connection and wiring;
(6) Front and rear maintenance;
(7) Adapt to the size of mainstream cabinets;
(8) Unit height is adjustable;
(9) Advanced smart controller;
(10) Multiple sets of cabinet temperature sensors;
(11) DC inverter compressor, automatic speed regulating fan;
(12) High return air temperature design;

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FocusAir Precision Air Conditioner User´s Manual
1.2 Model Description
The model description of FocusAir series air conditioner is shown in Table 1-2-1.
Table 1-2-1 Air conditioner model description
1
2
3
4
5
6
7
F
S
0
4
0
F
A
1~7 digits, describing common product configuration
Naming instructions:
1~2
digits
-
Product series name
FS
-
FocusAir row-level precision air conditioner series
3~5
digits
-
Total cooling capacity -kW
×××
-
Total cooling capacity: 25kW~70kW
6
digit
-
Wind out type
F
-
Front air supply
S
-
Air supply on both sides
L
-
Left air supply
R
-
Right air supply
7
digit
-
Refrigeration system configuration
A
-
Compressor system, air-cooled
W
-
Compressor system, water-cooled
C
-
Chilled water
G
-
Glycol dynamic natural cooling system
R
-
Air cooling + fluorine pump refrigeration system
1.3 Main Components
1.3.1 Indoor Unit
The indoor unit of FocusAir series air conditioner consists of the compressor, the evaporator, EC fan, the
controller, the expansion valve, the dryfilter, the humidifier, the heater, the liquid solenoid valve and other
components.
Compressor
It adopts high efficiency and energy saving DC inverter compressor, featuring high reliability, low
noise, long life, easy installation, etc.
Evaporator
The fin-and-tube heat exchanger adopts high-efficiency internally threaded copper pipes and
aluminum fins coated with hydrophilic layer, and the application of CFD flow field analysis and
optimization matching has greatly improved the heat exchange efficiency.

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FocusAir Precision Air Conditioner User´s Manual
Expansion valve
The electronic expansion valve can improve the control accuracy and response speed, realize
accurate cooling and stable system, accurately match the load, and have good energy-saving effect.
Fan
It adopts high-efficiency and high-reliability direct-connected fans, with large air volume, long air
supply distance, and easy maintenance.
Dry filter
The dry filter can effectively remove the moisture present in the system within a period of time and
also filter the impurities generated in the long-term operation to ensure normal operation of the
system.
Liquid circuit solenoid valve
The liquid pipelines on the high and low pressure sides can be shut off during shutdown, which can
effectively prevent refrigerant migration during shutdown and reduce the risk of start-up liquid
shock of compressor.
Condensate drain pump
Compact structure, large flow and high lift ensure that the unit can overcome the height difference
and drain water.
Oil separator
It can improve the oil return efficiency of the system’s refrigerating oil, especially suitable for the
application scenarios where the indoor and outdoor unit connection pipelines are extremely long.
Sight glass (optional)
The window of the system circulation allows observing the state of the refrigerant and is mainly
used to observe the moisture content of the system.
Wet film humidifier (optional)
It adopts a wet film core with strong water absorption, non-toxicity, acid and alkali resistance,
mildew resistance, and good flame retardancy, featuring zero power consumption, large
humidification capacity, water saving, and easy maintenance.
Electrode humidifier (optional)
Automatic control, energy saving and water saving, automatic drainage, automatic cleaning, and

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FocusAir Precision Air Conditioner User´s Manual
convenient maintenance.
Heater (optional)
PTC electric heating features compact structure, large heating capacity, uniform heat and little
influence on the internal wind resistance of the unit, the electric heating surface is not charged, and
the safety is high.
Extension assembly (optional)
When the length of the connecting pipe exceeds 30m, an extension assembly should be added to
ensure the normal start-up and operation of the unit and improve the reliability.
Cryogenic components (optional)
When the outdoor environment temperature is lower than -20℃, increase the assembly of cryogenic
components to ensure the reliable operation of the unit above -35℃.
Fluorine pump energy saving module (optional)
In northern areas, when the outdoor environment temperature is lower than 5℃in winter, the
fluorine pump function is activated, and the outdoor natural cold source is used for cooling, which
improves the energy-saving effect.
1.3.2 Outdoor Unit
The outdoor unit of our machine room air conditioner consists of an external fan, condenser, and
inverter.
External fan
It adopts high-efficiency and high-reliability axial flow fan with large air volume and easy
maintenance.
Condenser
The condenser adopts high-efficiency internally threaded copper pipes and punched-slit fins, which
greatly improves the heat exchange efficiency.
Inverter
According to the condensing pressure signal, the inverter makes stepless adjustments to the outdoor
fan.
1.3.3 Controller
The microprocessor controller of the FocusAir series air conditioner is equipped with a 4.3-inch (FS012) or
7-inch (FS025～FS070) touch display, with simple user interface. Multi-level password protection can

Chapter 1 Product Overview 05
FocusAir Precision Air Conditioner User´s Manual
effectively prevent illegal operations. The controller has functions such as power-down self-recovery and
fault alarm reminder. Through the menu operation, you can accurately understand the running time of each
main component. The expert fault diagnosis system can automatically display the current fault content,
which is convenient for the personnel to perform equipment maintenance. It is equipped with external
interfaces such as RS485 interface and USB supporting safety protection mechanism. The communication
protocol adopts the standard communication protocol of the Ministry of Information Industry. The panel of
the microprocessor controller is shown in Fig. 1-3-1.
Fig. 1-3-1 Micro-processing controller panel
1.3.4 Remote monitoring software
FocusAir series air conditioners adopt the standard agreement of the Ministry of Information Industry.
Front-end smart device protocol. Through the equipped RS485 interface, the FocusAir series air-conditioner
system can communicate with the background computer and accept the control of the background software.
1.4 Environmental Requirements
1.4.1 Operating
The operating environment of FocusAir series air conditioners should meet the requirements of GB4798.3-
2007. See Table 1-4-1 for details.
Table 1-4-1 Operating environment requirements
Item
Requirements
Ambient temperature
Indoor: 18℃~45℃, 20%RH~85%RH
Outdoor: -20℃~＋45℃(normal type)
-35℃~+45℃(cryogenic type)
Protection (outdoor
unit)
IP54