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Gree A Series Service Manual

Modular-type air-cooled (heat pump) chiller
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A Series Modular-type Air-cooled (Heat Pump) Chiller

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Summary of Contents for Gree A Series

  • Page 1 A Series Modular-type Air-cooled (Heat Pump) Chiller...

  • Page 2: Table Of Contents

    Contents 1 Safety Notice ......................1 2 Preface ........................1 3 Product Information ....................1 3.1 Instroduction ......................1 3.1.1 Lineup ......................1 3.1.2 Model Number Nomenclature..............2 3.1.3 Product Features ..................2 3.1.4 Nominal Operating Conditions..............3 3.1.5 Operation Range..................3 3.2 Unit Performance Curves ..................
  • Page 3 4.4.1 Homepage ....................20 4.4.2 Menu Page....................21 4.4.3 Introduction to the Pop-up Windows............22 4.4.4 Backlight....................23 4.5 Operation Instructions ..................23 4.5.1 On/Off......................23 4.5.2 Functions....................24 4.5.3 Parameter ....................34 4.5.4 Information ....................35 4.5.5 E-Clear ...................... 46 4.5.6 General .....................
  • Page 4 5.5.3 Installation of the Expansion Tank ............84 5.5.4 Installation of Condensate Pipes .............. 86 5.6 Electric Wiring....................88 5.6.1 Safety Precautions..................88 5.6.2 Control Concept ..................88 5.6.3 Specification of Power Cord and Air Switch ..........90 5.6.4 Wiring of the Electric Control Cabinet............90 5.6.5 Filed Wiring ....................
  • Page 5 8.2.1 Routine Maintenance Items ..............130 8.2.2 Periodic Maintenance Items ..............130 8.3 Freeze Protection in Winter ................132...

  • Page 6: Safety Notice

    Preface Thank you for selecting Gree’s A Series Inverter Modular Air-cooled Chiller (Heat Pump). Please read this instruction manual carefully before installing and using the product and achieve operating effect, we hereby instruct as below:...

  • Page 7: Model Number Nomenclature

    A Series Modular-type Air-cooled (Heat Pump) Chiller 3.1.2 Model Number Nomenclature — Code description Options Unit LS:chiller Compressor type QW: hermetic scroll/rotor type Default:cooling only Unit function R:heat pump Cooling method of condenser F:air-cooled Rated cooling capacity Rated cooling capacity = number (kW)

  • Page 8: Nominal Operating Conditions

    A Series Modular-type Air-cooled (Heat Pump) Chiller It is equipped with the top-end microcomputer control system which is capable of providing well-rounded protection and self-diagnosis. ■ High reliability： It is constructed of well-designed refrigeration parts and well-designed system, structure and electric control, adequately guaranteeing reliable operation ■...
  • Page 9 A Series Modular-type Air-cooled (Heat Pump) Chiller...

  • Page 10: Working Principle

    A Series Modular-type Air-cooled (Heat Pump) Chiller Working Principle 3.3.1 Principle Diagrams Techinical Parameters List 3.4.1 Electrical Parameters Electrical parameters table Compressor Power Unit supply Quantity Quantity LSQWR- 380V~41- 5VAC 3Ph F35VM/ 17.5 NaA-M 50Hz LSQWR- 380V～ 415VAC F60VM/ 17.5 1.28...

  • Page 11: Performance Parameters Table

    A Series Modular-type Air-cooled (Heat Pump) Chiller 3.4.2 Performance Parameters Table LSQWRF35V- LSQWRF60V- LSQWRF65V- Model M/NaA-M M/NaA-M M/NaA-M Cooling capacity Heating capacity Rated cooling power 12.4 21.9 24.8 Rated heating power 10.8 20.2 21.9 dB(A） Noise Power supply 380–415V 3N ～ 50Hz...

  • Page 12: Scope Of Supply

    A Series Modular-type Air-cooled (Heat Pump) Chiller Rated power 750×2 750×2 750×2 of fan Airflow volume 1.26×10 2.4×10 2.4×10 Width 1340 2200 2200 Outline Depth dimension Height 1605 1675 1675 Wet weight Operating weight Scope of Supply Heat pump Item...
  • Page 13 A Series Modular-type Air-cooled (Heat Pump) Chiller Average ward Pub, cafe 80～120 70～110 Rooms for diagnosis, West 100～160 75～140 treatment and, restaurant injection Chinese X-ray, CT and restaurant, 150～250 90～120 MRT Room banquet hall operation and Store 80～110 100～150 delivery room...
  • Page 14 A Series Modular-type Air-cooled (Heat Pump) Chiller Lounge (no Rest room 80～100 160～250 smoking area) Lounge for Business hall 120～160 judges, coaches 100～140 and athletes Bank Office 70～120 Deluxe office 120～160 Machine Average office 120～160 90～120 room Office Exhibition hall 150～200...
  • Page 15 A Series Modular-type Air-cooled (Heat Pump) Chiller Reception Room First Floor/ ground floor Depart- ment Specialty store store Mall Food zone Super- market Clothing zone Banquet hall Fac- South 0.12 West 0.12 direc- North 0.12 tion Hotel guest room East 0.12...
  • Page 16 A Series Modular-type Air-cooled (Heat Pump) Chiller Estimated Cooling Load per Unit Building Area Table 3.6.3 Construction type Cooling load（W/m ） Cooling load (W/m ） Hotel 35～45 70～81 Large auditorium 56～72 Office building 42～54 84～98 Library, museum 18～32 35～41 56～65 (only service hall) Store 25～59...
  • Page 17 (2)Calculate the heating load By the estimated heating load: 12000×70=840000W=840kW (3)Select the desired model and quantity Look up the GREE Technical Guide Manual and it is concluded that 29 SQWRF60VM/ NaA-M meet the design requirement (cooling load: 1740kW,, heating load: 1885kW).

  • Page 18: Unit Control

    A Series Modular-type Air-cooled (Heat Pump) Chiller Unit Control Schematic Diagram Description: (1)A water flow cutout is used to judge the water flow rate. When the flow rate is too low, it will trip off, and the control board will send this signal to the display and the water pump.
  • Page 19 A Series Modular-type Air-cooled (Heat Pump) Chiller (5)An entering water temperature sensor is used to detect the temperature of the entering water which will determine whether to start or stop the compressor and the auxiliary elec- tric heater. When this sensor fails, all compressors of the unit will stop.

  • Page 20: Operation Flowchart

    A Series Modular-type Air-cooled (Heat Pump) Chiller Operation Flowchart 4.2.1 Cooling...

  • Page 21: Heating

    A Series Modular-type Air-cooled (Heat Pump) Chiller 4.2.2 Heating...

  • Page 22: Key Control Logics

    A Series Modular-type Air-cooled (Heat Pump) Chiller Key Control Logics 4.3.1 Cooling Control 4.3.1.1 Freeze-up Protection For each single unit, when the anti-freezing temperature or the leaving water temperature is lower than the limit value, freeze protection will work; when the anti-freezing temperature and the leaving water temperature go higher than the normal value, freeze protection will quit.

  • Page 23: Automatic Anti-Freezing Operation

    A Series Modular-type Air-cooled (Heat Pump) Chiller 4.3.2.3 Shutdown Manual or timing shutdown: compressor stops firstly, and the auxiliary electric heater second, and then the fan and water pump. Shutdown upon the temperature set point: the compressor and the fan stop firstly, while the water pump keeps running.

  • Page 24: General Introduction

    A Series Modular-type Air-cooled (Heat Pump) Chiller 4.3.9.2 Irrecoverable Protection (1)Protection against High Pressure for the Compressor 1/2 When it is detected that the high pressure cutoff of the compressor 1/2 is tripped off, com- pressor 1/2 will stop immediately. If both compressors are closed, their fans will be delayed to stop.

  • Page 25: Homepage

    A Series Modular-type Air-cooled (Heat Pump) Chiller Note: the function for the press button at the upper right corner is reserved and there will no response to this operation.This picture as shown above is just for reference 4.4.1 Homepage Fig 4-1 Homepage...

  • Page 26: Menu Page

    A Series Modular-type Air-cooled (Heat Pump) Chiller [Notes] When there is no any operation in ten minutes at any page, except the warming pages as shown in the figure below, it will automatically back to the homepage. 4.4.2 Menu Page...

  • Page 27: Introduction To The Pop-Up Windows

    A Series Modular-type Air-cooled (Heat Pump) Chiller Interpretation Item It is used to access to the error clearing and “Unlock discharge E-CLEAR failure” page. It is used to access to the general setting pages. GENERAL Homepage icon It is used to go back to the homepage.

  • Page 28: Backlight

    A Series Modular-type Air-cooled (Heat Pump) Chiller 4.4.4 Backlight When it is deactivated, the control panel will automatically light off 5 minutes later after there is no any operation to the control panel. Any touching to the effective area will again light on the control panel.

  • Page 29: Functions

    A Series Modular-type Air-cooled (Heat Pump) Chiller (2)Press “OK” and then the control panel will access to the following “ON” page. (3)At the homepage and menu page when the unit is “ON”, by touching “ON/OFF”, the control panel will access to the following page.
  • Page 30 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)At the menu page, it will go to the parameter setting page by touching“FUNCION”, as shown in the figure below. Fig 4-3 Function Page 1 Fig 4-4 Function Page 2 Fig 4-5 Function Page 3 (2)At the function setting page, the last page or next page icon allows the control panel accessing to the last or next function page;...
  • Page 31 A Series Modular-type Air-cooled (Heat Pump) Chiller (4)At the desired function setting page, touching“OK” will save the setting and touching“Cancel” will exit this setting. Meanwhile the control panel will back to the function setting page under both conditions. [Notes] 1)When there is submenu for the desired function option, by touching it, the control panel will access to the sub-menu setting page.
  • Page 32 A Series Modular-type Air-cooled (Heat Pump) Chiller touching “OK”, this setting will be saved and the control panel will go back to the function setting page; or by touching “Cancel” this setting will not be saved and directly go back to the function setting page.
  • Page 33 A Series Modular-type Air-cooled (Heat Pump) Chiller (5)Timer ON/OFF Operation Instructions At the function setting page, by touching “Timer ON/OFF”, the control panel will go to the corresponding setting page. Then, select the desired option. After that, by touching “OK”, this setting will be saved and the control panel will go back to the function setting page;...
  • Page 34 A Series Modular-type Air-cooled (Heat Pump) Chiller 4) Touch the desired time point and input the hour and minute (as shown in the figure below). 5) Then, touch “□” under “Select” to make it turn to “√”, which then indicates the corresponding period has been invalidated.
  • Page 35 A Series Modular-type Air-cooled (Heat Pump) Chiller 2) Select the unit in need of defrosting. Once “□” turns green, it indicates this unit has been selected. Two or more units cannot be selected at the same time. 3) Enable the defrosting function of the selected unit. When “□”turns to √”, it indicates manual defrosting function for this unit has started as shown in the figure below.
  • Page 36 A Series Modular-type Air-cooled (Heat Pump) Chiller 2) At the unit selection page, the on-line units are in white color and those off-line are in grey. 3) This function setting is unavailable to the off-line units. 4) Do not activate this function for two or more units.
  • Page 37 A Series Modular-type Air-cooled (Heat Pump) Chiller panel will go back to the function setting page; or by touching “Cancel” this setting will not be saved and directly go back to the function setting page. (10)Quiet Mode Operation Instructions 1) At the function setting page, by touching “Quiet mode”, the control panel will go to the corresponding setting page, where it can be set to be “On’...
  • Page 38 A Series Modular-type Air-cooled (Heat Pump) Chiller will be put into use; or by touching “No” / “Cancel”, the control panel will go back to the function setting page. [Notes] 1) After this setting, all parameters at the user parameter setting page will go back to the default setting.

  • Page 39: Parameter

    A Series Modular-type Air-cooled (Heat Pump) Chiller 4.5.3 Parameter Operation Instructions (1)At the menu page, by touching “PARAMTER”, the controller will access to the parameter setting page, as shown in the figure below. Fig 4-6 Parameter Setting Page 1 (2)At the parameter setting page, by touching the last page and next page icons, the desired setting page can be selected.

  • Page 40: Information

    A Series Modular-type Air-cooled (Heat Pump) Chiller and the controller will back to the parameter setting page; while by touching “Cancel”, this setting will not be saved but the controller will back to the parameter setting page. [Notes] 1)For the parameters with different defaults under different conditions, when the constraint (like, unit type) changes, the parameter will back to the default value under the corresponding condition.
  • Page 41 A Series Modular-type Air-cooled (Heat Pump) Chiller (2)At the above page, by selecting the desired unit, the control panel will go to the following page. Notes 1)It is only available for the on-line units, namely those in white. 2)When there is some error, the corresponding unit will be in red and there will a red point at its upper right corner.
  • Page 42 A Series Modular-type Air-cooled (Heat Pump) Chiller Fig 4-9 Unit with a Red Point (1)Status Operation Instructions By touching“Status”, the control panel will go to the stats pages, where it is able to check the running status of the unit.
  • Page 43 A Series Modular-type Air-cooled (Heat Pump) Chiller Fig 4-12 Status Page 3 Name Status Name Status Off; Cooling; Heating; Four-way valve 1 System status On; Off Defrosting; Automatic antifreeze Four-way valve 2 Compressor 1 On; Off On; Off Compressor 2 On;...
  • Page 44 A Series Modular-type Air-cooled (Heat Pump) Chiller Fig 4-13 Paramater Page 1 Fig 4-14 Parameter Page 2 Fig 4-15 Parameter Page 3...
  • Page 45 A Series Modular-type Air-cooled (Heat Pump) Chiller Fig 4-16 Parameter Page 4 Name Name Entering water-T Suction temperature 1 Leaving water-T Suction temperature 2 Defrosting temperature 1 Shell-and-tube inlet-T 1 Defrosting temperature 2 Shell-and-tube inlet-T 2 Discharge temperature 1 Shell-and-tube outlet-T 1...
  • Page 46 A Series Modular-type Air-cooled (Heat Pump) Chiller [Notes] The controller can display real-time errors and all real-time errors can be displayed there. When the quantity of error exceeds 5, by touching the last or next page icon, the desired error can be checked.
  • Page 47 A Series Modular-type Air-cooled (Heat Pump) Chiller Short Name Full Name Sys2 low pressure Protection against low pressure of system 2 Entering water TSE Entering water temperature sensor error Leaving water TSE Leaving water temperature sensor error Anti-freeze/anti-over-heating temperature sensor...
  • Page 48 A Series Modular-type Air-cooled (Heat Pump) Chiller Short Name Full Name Failure of pump2 Protection against failure of pump 2 Fan1 error Fan 1 error Fan2 error Fan 2 error DC busbar under-voltage or voltage drop error of DC under-voltageC1...
  • Page 49 A Series Modular-type Air-cooled (Heat Pump) Chiller Short Name Full Name Heat sink or IPM or PFC over-temperature of HS-IPM-PFC over-TC2 compressor 2 Heat sink or IPM or PFC temperature sensor error HS-IPM-PFC SEC2 of compressor 2 Charging circuit-EC2 Charging circuit error of compressor 2...
  • Page 50 A Series Modular-type Air-cooled (Heat Pump) Chiller Short Name Full Name Fan-Dri-Comm-EF2 Communication error to the drive of fan 2 Heat sink or IPM or PFC over-temperature of fan HS-IPM-PFC over-TF2 Heat sink or IPM or PFC temperature sensor error...

  • Page 51: E-Clear

    A Series Modular-type Air-cooled (Heat Pump) Chiller 4.5.5 E-Clear Operation Instructions At the menu page, touching “E-clear”, it will access to the error clear page. At this page, it is able to operate error clearing and discharge failure unlocking. (1)Clear Unit Errors Operation Instructions At the “ERROR CLEAR“...

  • Page 52: General

    A Series Modular-type Air-cooled (Heat Pump) Chiller 2) When touching “No” or “Cancel”, this operation will quit and the unit will do not do any operation. 3) After this operation, all recovered errors for all on-line units will be cleared; for those unrecovered, there will still be alerts.
  • Page 53 A Series Modular-type Air-cooled (Heat Pump) Chiller Range Function Default Remarks Key tone On/Off “On” indicates the controller will always light on. Back light “Off” indicates that when it is detected On/Off that there is no any operation in five minutes the controller will light off.
  • Page 54 A Series Modular-type Air-cooled (Heat Pump) Chiller Fig 4-19 General Page with Deactivated Key Tone (2)Backlight Operation Instructions Refer to Section 2.6.1 (3)System Lock Operation Instructions 1) At the function setting page, by touching “GENERAL”, the control panel will go to the corresponding setting page.
  • Page 55 A Series Modular-type Air-cooled (Heat Pump) Chiller 2) The setting value for the system clock can be changed by the sliding the blue digits. Then, by touching the saving icon, this setting will be saved and rightly take effective. While, by touching the back icon, this setting will not be saved and the controller will back to the general setting page.

  • Page 56: Setup Of Toggle Switches On The Motherboard

    A Series Modular-type Air-cooled (Heat Pump) Chiller corresponding setting page. Then, by touching “Program information”, the controller will access to the program checking page, as shown in the figure below. [Notes] “Version” indicates the program version for the control panel.

  • Page 57: Smart Management System

    A Series Modular-type Air-cooled (Heat Pump) Chiller Note: the black block represents where the projecting lever of the toggle switch is. Smart Management System 4.6.1 Long-distance Monitoring/BMS Interface This long-distance monitoring system allows users through a computer to remotely monitor...

  • Page 58: Network Of The Long-Distance Monitoring System

    A Series Modular-type Air-cooled (Heat Pump) Chiller 4.6.2 Network of the Long-distance Monitoring System 4.6.2.1 Net Topological Diagram Note: the system as shown in the figure above consists of 1~16 single units depending on the actual demand of the project.

  • Page 59: Hardware

    A Series Modular-type Air-cooled (Heat Pump) Chiller not required and RS485 signal lines from BMS can be directly connected to the BMS port of the control panel. When there are multiple units, signal lines from BMS are required to connected to the BMS port through the patching board.

  • Page 60: Model Selection Instructions

    A Series Modular-type Air-cooled (Heat Pump) Chiller It is for remote monitoring other than BMS. Remote Other main parts: FG30-00/A(M) MC200027 monitoring kit monitoring software disc, optoelectronic isolated converter It is required when several units forms a network. It is...
  • Page 61 A Series Modular-type Air-cooled (Heat Pump) Chiller It is for remote monitoring other than BMS. Remote monitoring FG30-00/A(M) Other main parts: monitoring software disc, optoelectronic isolated converter It is required when Communication ZTSJ0 several units forms a patching board network.
  • Page 62 A Series Modular-type Air-cooled (Heat Pump) Chiller 4.6.4.1.2 Selection of Part Quantity Communication Optoelectronic Remote monitoring Model patching board repeater 1)one set of remote monitoring kit FG30- A repeater is 00/A(M) is required every 800m required； communication A series modular...

  • Page 63: Unit Installation

    A Series Modular-type Air-cooled (Heat Pump) Chiller 4.6.4.2.3 Example 3 This project consists of 35 air conditioning systems including 103 LSQWRF60VM/NaA-M units. Among then, there are 34 air conditioning systems which consists of 3 LSQWRF60VM/ NaA-M. The remaining consists of 1 LSQWF65M/NaE-M. Totally 35 control panels are required.

  • Page 64: Preparations Before Installation

    Precautions for Installation WARNING (1)Installation should be performed by GREE appointed servicemen, or improper installation would lead to unusual operation, water leakage, electric shock or fire hazard. (2)The unit should be installed on the foundation which is capable of supporting the unit, or the unit would fall off or even lead to personal injury.

  • Page 65: Importance Of Installation

    A Series Modular-type Air-cooled (Heat Pump) Chiller CAUTION (1)Always use safety outfits at the construction site. (2)No smoking and no drunken operation are allowed at the construction site. (3)Wear no gloves and tighten the cuff when operating the machinery and electrical equipment.

  • Page 66: Selection Of Installation Materials

    A Series Modular-type Air-cooled (Heat Pump) Chiller Typical Problems Caused Influences It would damage the electric element Mis-wiring of power lines and lead to safety hazards. It would lead to abnormal Mis-wiring of communication lines communication. Improper protection to the...
  • Page 67 A Series Modular-type Air-cooled (Heat Pump) Chiller Welded steel, seamless steel, galvanized steel, nodular cast iron, composited aluminum and plastic (PAP1, Water (t≤95℃) lines XPAP2, RPAP5), PB, PE-X Welded steel, seamless steel, galvanized steel, PP-R, Water (t≤60℃) lines composited aluminum and plastic (PAP1, XPAP2,...
  • Page 68 A Series Modular-type Air-cooled (Heat Pump) Chiller Zones in China are classified by the degree of humidity. Zone I: Beijing, Tianjin, Chongqing, Xi’an, Hangzhou, Zhengzhou, Changsha, Nanchang, Shenyang, Changchun, Herbing, Jinan, Shijiazhuang, Guiyang, Taipei. Zone Ⅱ: Shanghai, Nanjing, Wuhan, Dalian, Fuzhou, Xiamen, Gumming, Chengdu, Nanning, Hong Kong, Macao, Guangzhou, and other coastal cities.
  • Page 69 A Series Modular-type Air-cooled (Heat Pump) Chiller (3)Ball Valve: it is mainly used to cut off or distribute the tube flow or change its direction. (4)Butterfly Valve: it is widely applicable to all kinds of fluids under 2.0Mpa and 200℃.
  • Page 70 A Series Modular-type Air-cooled (Heat Pump) Chiller Selection Principle Item Butterfly valves for the inlet or return water tubes. Butterfly valves for the horizontal main tubes. Gate valves, filters, electric 2-way valves or electric 3-way valves for the air handling units.
  • Page 71 A Series Modular-type Air-cooled (Heat Pump) Chiller Selection Principle Item Spring-type check valves are good choices when there is high requirement on the sealing performance. Quick-closing check valves or slow-shut check valves with damping devices are good choices when the water hammer is required to be reduced.

  • Page 72: Tools

    A Series Modular-type Air-cooled (Heat Pump) Chiller Tools 5.3.1 Cutting and Finishing Tools It mainly includes: abrasive-disc cutter, hand abrasive wheel, chain blocks, electric drill, threading machine, pressure test device, handsaw, pipe wrench, box wrench, monkey wrench, hammer, and electric welder etc.
  • Page 73 A Series Modular-type Air-cooled (Heat Pump) Chiller Image Usage Name Hand Mill to install tubes Hand Electric to drill holes Drill to measure Steel Band Tape length to judge the Level Bar levelness to pressurize Booster Pump tubes to cut steel...

  • Page 74: Installation Instructions

    A Series Modular-type Air-cooled (Heat Pump) Chiller Installation Instructions 5.4.1 Outline Dimensions (1)LSQWRF35VM/NaA-M(unit:mm）...

  • Page 75: Precautions For Installation

    A Series Modular-type Air-cooled (Heat Pump) Chiller (2)LSQWRF60VM/NaA-M, LSQWRF65VM/NaA-M (unit:mm) 5.4.2 Precautions for Installation (1)Pipelines and electric lines should be correctly connected. (2)Rubber pads and rubber flexible connectors should be used during installation for noise and vibration reduction. (3)Under subzero climate, when the heat pump runs for cooling, anti-freeze liquid is required.

  • Page 76: Installation And Service Space

    A Series Modular-type Air-cooled (Heat Pump) Chiller 5.4.4 Installation and Service Space The interval between each single unit should be larger than 0.5m so that there is enough space for entering air and maintenance. The distance between the unit and any barrier should be or larger than 1m so as to keep good ventilation around the unit.

  • Page 77: Handling And Lifting

    During lifting, the main unit should be kept stable both horizontally and vertically. 5.4.6.1 Handling and Lifting Each unit will undergo a series of strict factory inspections and tests to guarantee the expected performance and quality. However, special attention should be paid during handling and shipping to prevent the control system and the piping system from being damaged.

  • Page 78: Piping And Insulation

    A Series Modular-type Air-cooled (Heat Pump) Chiller 5.4.6.2 Placement of the Main Unit (1)Place the unit on the foundation. (2)There should be no clearance between the foundation and the baseboard of the unit. (3)Lift the unit, put the rubber pad on the foundation and then place the unit on the rubber pad.
  • Page 79 A Series Modular-type Air-cooled (Heat Pump) Chiller 6 of total rated flow rate per hour of each module (for instance, for some project with four modularized LSQWRF60VM/Na-M units, if the rated water flow of each unit is 10.3m then the required capacity of the whole project should be larger than 10.3*4*1/6=6.87m h).
  • Page 80 A Series Modular-type Air-cooled (Heat Pump) Chiller ■ How to drain the water system： (1)Loosen screws around the panel and then take down it. (2)Remove anticlockwise the blind plug located at the bottom of the heat exchanger to let the chilled water flow out, after that, tighten the blind plug and reinstall the panel. (- Note: place the drainage equipment beneath the drain pipe to prevent pollution caused by the drain water.

  • Page 81: Requirements On Piping

    A Series Modular-type Air-cooled (Heat Pump) Chiller NOTE Keep the purge valve of the water system open in order to drain the evaporator and condenser completely. 5.5.2 Requirements on Piping (1)The piping slope should meet design and construction regulations and the flexible pipe is not allowed to be longer than 150mm.
  • Page 82 A Series Modular-type Air-cooled (Heat Pump) Chiller Piping Flowchart 5.5.2.1 Check for Documents and Drawings (1)Check the process flow, construction procedures and quality requirements in accordance with drawings and technical data. (2)Check the installation location, installation height, arrangement, and installation space of pipes in accordance with equipment drawings and building drawings.
  • Page 83 A Series Modular-type Air-cooled (Heat Pump) Chiller 5.5.2.4 Installation of Pipe Brackets (1)The supporting beam should be fastened to the wall, pillar or other building structure. It should be placed horizontal horizontally with the top surface parallel with the center line of the pipe.
  • Page 84 A Series Modular-type Air-cooled (Heat Pump) Chiller 1) Threads should be processed by the threading machine. 2) Use marnen as stuffing material and remove those outside of the threads after pipes have been installed. 3) Threads should be clean and at least 90% threads should be intact. Exposed threads at the connection joint after installation should be 2-3 without any exposed stuffing.
  • Page 85 A Series Modular-type Air-cooled (Heat Pump) Chiller 5) The welding height can’t be lower than the surface of the parent metal. There should be no crack and poor welding at the welding seam and the heat-affected zone. There should be no slag inclusion, crater and pore at the welding zone.
  • Page 86 A Series Modular-type Air-cooled (Heat Pump) Chiller 4) When a flange is connected with another, they should match each other naturally to avoid pipes or equipment from producing extra stress. 5) The flange at the branch should keep a distance of at least 100mm from the main pipe, and the flange at the thru-wall pipe should keep a net distance of at least 200mm with the wall.
  • Page 87 A Series Modular-type Air-cooled (Heat Pump) Chiller when all main pipe and riser pipes have been installed. The pressure test should be taken prior to the insulating procedure and done in accordance with the following statement. (1)The pressure test should be done one section by another. The manometer should be in- stalled at the lowest point of the testing pipes.
  • Page 88 A Series Modular-type Air-cooled (Heat Pump) Chiller (2)Insulating: PEF (δ=30mm) is taken as the insulating material. 1) The insulation should be arranged evenly and smoothly. 2) Flanges should be insulated separately. 3) Seams of the insulation should be airproof. 4) Insulation for the stainless iron sheet should be smoothly and the seams should be airproof.

  • Page 89: Installation Of The Expansion Tank

    A Series Modular-type Air-cooled (Heat Pump) Chiller 1) The typeface on the label matches with the diameter of the pipes. 2) The label indicates the name and direction of the fluid. 3) The label is eye-catching and struck reliably. 5.5.2.9 Cleaning of Pipes...
  • Page 90 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)After the full water test, surface of the water tank should be de-rusted, finished and treated with ant-corrosion measure. The artificial anti-rust class should be st3. (2)After that, when water tank temperature is below 30℃, it should be painted with red lead rust-proof paint twice.

  • Page 91: Installation Of Condensate Pipes

    A Series Modular-type Air-cooled (Heat Pump) Chiller 5.5.4 Installation of Condensate Pipes Setup-Insulating-Fastening NOTE (1)Adverse slope is not allowed for the slope larger than 1%. (2)It can’t connect with the rain water pipe, sewage pipe or other pipes. (3)The elbow ventilator should be installed at the highest point of the condensate pipe to prevent foreign matters coming into the drain pipe.
  • Page 92 A Series Modular-type Air-cooled (Heat Pump) Chiller Fig 5-2 Tee Joint When there are several indoor units at the same floor, their condensate is usually drained out through one main pipe. In this case, the branches pipe for each unit should be located higher than the main pipe.

  • Page 93: Electric Wiring

    A Series Modular-type Air-cooled (Heat Pump) Chiller Insulation should be thickened at humid areas. 5.5.4.3 Fastening The insulating tube is just required to be bundled and fastened at the supporting bracket. Electric Wiring 5.6.1 Safety Precautions DANGER (1)The electricians should be licensed.
  • Page 94 A Series Modular-type Air-cooled (Heat Pump) Chiller Note: the output control lines of the AC contactors for the running indicator, water pump 1, water pump 2, auxiliary electric heater 1, auxiliary electric heater 2 can be wired to the corresponding wiring board of any one unit, while those for the error indicator and external passive contact switch should be wired to the corresponding wiring board of all units as shown in the figure below.

  • Page 95: Specification Of Power Cord And Air Switch

    A Series Modular-type Air-cooled (Heat Pump) Chiller 5.6.3 Specification of Power Cord and Air Switch See the table below for selection of the power lines and the air switches. Min. sectional area of the Capability of the power cable（mm ）...

  • Page 96: Filed Wiring

    A Series Modular-type Air-cooled (Heat Pump) Chiller 5.6.5 Filed Wiring ■ Safety Codes (1)All wiring shall comply with applicable codes and engineering requirements. (2)All field wiring shall be performed by the qualified electrician. (3)Never perform wiring before the power supply is cut off.
  • Page 97 A Series Modular-type Air-cooled (Heat Pump) Chiller with a suitable cord anchorage against cord loosing.See the wiring diagrams below for ex- ternal wiring. LSQWRF35VM/NaA-M LSQWRF60VM/NaA-M,LSQWRF65VM/NaA-M (4)The unit shall be grounded reliably and never connect the ground wire with the gas fuel pipe, water pipe, lightening rod or telephone line.
  • Page 98 A Series Modular-type Air-cooled (Heat Pump) Chiller (2)The electric box will send the control signal (220 AC, 5A) to control the chilled water pump and auxiliary electric heater, however, never do not drive them directly through the control signal but through their AC contactors.

  • Page 99: Networking And Wiring Between Units

    A Series Modular-type Air-cooled (Heat Pump) Chiller 5.6.6 Networking and Wiring between Units Notes (1)As shown in the diagram above, CN33 and CN25 of all modules are connected by a three-core four-pin shielded communication line whose ground wire will be linked to the...
  • Page 100 (4)There are two solutions for remote monitoring. 1) Install the remote monitoring software at the PC. 2) Based on GREE provided Modbus protocol, the user can do second development to this protocol. Note: those enclosed by the dotted lines indicate the remote monitoring equipment. When the quantity of the display panel exceeds 30 or length of the communication line exceeds 800m, extra photoelectric relay is required.

  • Page 101: Electric Wiring Digram

    A Series Modular-type Air-cooled (Heat Pump) Chiller 5.6.7 Electric Wiring Digram ■ LSQWRF35VM/NaA-M ■ LSQWRF60VM/NaA-M, LSQWRF65VM/NaA-M...
  • Page 102 A Series Modular-type Air-cooled (Heat Pump) Chiller The electric wiring diagram stuck to the main body of the unit always prevail.

  • Page 103: Jumpers

    A Series Modular-type Air-cooled (Heat Pump) Chiller 5.6.8 Jumpers When it is required to replace the main board, be sure the main board can match with the applicable jumpers. Jumpers List Table 5.6.1 Matched Jumper No Model Code Compressor QXAS-...

  • Page 104: Safety Precautions For Commissioning

    A Series Modular-type Air-cooled (Heat Pump) Chiller Safety Precautions for Commissioning WARNING (1)Safety measures should be taken during indoor operation. Any commissioning and service men should grasp and observe safety regulations of construction work. (2)Refrigeration mechanic, electricians, welders and other technicians of other special work all should be licensed.

  • Page 105: Check Before Commissioning

    A Series Modular-type Air-cooled (Heat Pump) Chiller 6.3.3 Check before Commissioning 6.3.3.1 Completeness Check to the Main Unit Is the surface of the unit in good condition? Is there leak at any pipe connector? Is any part damaged? 6.3.3.2 Check to Installation of the Unit...

  • Page 106: Initial Run

    A Series Modular-type Air-cooled (Heat Pump) Chiller 6.3.3.5 Check to the Electric System WARNING (1)Do not check the power supply without any proper detection device and preventive measures, or it would lead to severe injuries or even death. (2)Each single unit should be supplied with dedicated power lines. After wiring, check the following items one by one.
  • Page 107 A Series Modular-type Air-cooled (Heat Pump) Chiller at the outlet and inlet pipes. Also, adjust the flow control valves or shutoff valves to make the flow meet application requirements. When the environmental temperature is available, let the unit perform cooling (>15℃).

  • Page 108: Repair

    A Series Modular-type Air-cooled (Heat Pump) Chiller Repair Error List Protection Logic Error Name Error Source When the pressure is too high or the current exceeds the set point, the corresponding compressor will stop and the indicating LED on the control panel will...
  • Page 109 A Series Modular-type Air-cooled (Heat Pump) Chiller Protection Logic Error Name Error Source When the entering water temperature fails, all compressors and fans of the corresponding single unit will stop. When the discharge temperature sensor fails, the display panels will tell “Discharge temperature...
  • Page 110 A Series Modular-type Air-cooled (Heat Pump) Chiller Protection Logic Error Name Error Source When it is detected that the entering water temperature is 4℃ higher than the leaving water temperature and the Entering and leaving water Protection for the four-way...

  • Page 111: Flow Chart Of Troubleshooting

    A Series Modular-type Air-cooled (Heat Pump) Chiller Flow Chart of Troubleshooting (1)High pressure protection...
  • Page 112 A Series Modular-type Air-cooled (Heat Pump) Chiller (2)Low pressure protection...
  • Page 113 A Series Modular-type Air-cooled (Heat Pump) Chiller (3)High discharge protection...
  • Page 114 A Series Modular-type Air-cooled (Heat Pump) Chiller (4)Phase protection...
  • Page 115 A Series Modular-type Air-cooled (Heat Pump) Chiller (5)Water flow switch protection (6)Temperature sensor error...

  • Page 116: Power Distribution

    A Series Modular-type Air-cooled (Heat Pump) Chiller (7)Protection for the four-way valve Power Distribution 7.3.1 Power Distribution Logic Phase protector Protection conditions: phase loss or reversal of the power input for the phase protector. Action result: No power for the controller and ON/OFF operation is failed.

  • Page 117: Introduction To The Main Electric Element

    A Series Modular-type Air-cooled (Heat Pump) Chiller 7.3.2 Introduction to the Main Electric Element It is used to check if the Phase loss/reversal phase sequence of the protector power supply is correct or if there is power loss. It is used for the running and Intermediate relay fault indicators.

  • Page 118: Replacement Instructions

    A Series Modular-type Air-cooled (Heat Pump) Chiller Image Name Function It is used to control the flow Four-way valve direction of refrigerant for either heating or cooling. It is intended conduct heat Shell-and-tube heat exchange between the exchanger refrigerant and the second refrigerant.
  • Page 119 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Remove screws at the front panel; (2)Loosened screws should be put together to avoid loss; (3)Pull the front panel upwards and then 1. Remove remove it; the front (4)Properly keep the panels. removed front panel to avoid from being damaged.
  • Page 120 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Loosen screws at feet of the compressor with 4. Loosen a adjustable or box screws at feet spanner. of the (2)Loosened screws compressor. should be put together to avoid loss. (1)During replacement, care must be taken to not damage rubber pads;...
  • Page 121 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Reconnect and resolder the suction and discharge lines. 6. Reconnect Do charge nitrogen the suction during soldering; line, the discharge (2)After soldering, line, other charge high-pressure nitrogen for the leak pipes and electric lines.
  • Page 122 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Remove screws at the front panel; (2)Loosened screws should be put together to avoid loss; (3)Pull the front panel upwards and then 1. Remove remove it; the front (4)Properly keep the panel. removed front panel to avoid from being damaged.
  • Page 123 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Do use the one with the same model for replacement. The one with different model can be used after being approved by 4. Replace it relative technicians; with a new (2)Wrap it with wet cloth;...
  • Page 124 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Take out coils; (2)Loosen screws and take out 2. Take out pipe clamps and rubber pads; the coils, pipe (3)Wrap the valve with wet cloth clamps and to prevent the sliding block from rubber pads.
  • Page 125 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Solder pipes; (2)Do charge nitrogen during soldering; 5. Replace it with a new (3)Protection measures should be taken during soldering to one. prevent surrounding objects from being burnt out. (1)The bulge of the coil should match with the recess of the 6.
  • Page 126 A Series Modular-type Air-cooled (Heat Pump) Chiller 2. De-solder De-solder connection pipes with a connection soldering gun. pipes. 3. Take out the Loosen fixed screws and take out vapor-liquid the vapor-liquid separator. separator. (1)Connect a nitrogen line. When its size is quite large, 4.
  • Page 127 A Series Modular-type Air-cooled (Heat Pump) Chiller 6.When it is required to add lubricating oil, charge it from Charge lubrication oil from the inlet the inlet of the of the vapor-liquid separator and vapor-liquid then do soldering. separator before soldering.
  • Page 128 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Remove the insulation of the compressor; (2)Loosen screws of power lines 2. Remove with a screwdriver; power lines and (3)Draw out power lines; the electric (4)Draw out the electric heater. heater. Note: power lines and their terminals should be numbered to avoid incorrect rewiring.
  • Page 129 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Reconnect and resolder the suction and discharge lines. 6. Reconnect Do charge nitrogen during the suction line, soldering; the discharge (2)After soldering, charge high- line, other pipes pressure nitrogen for the leak and electric test.
  • Page 130 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Remove screws at the front panel; (2)Loosened screws should be put together to avoid loss; (3)Pull the front panel upwards 1. Remove the and then remove it; front panel. (4)Properly keep the removed front panel to avoid from being damaged.
  • Page 131 A Series Modular-type Air-cooled (Heat Pump) Chiller 3. Record the (1)Remember installation direction of the direction before replacement; 4–way valve before de- (2)Remove coils; soldering. The (3)Wrap it with wet cloth to keep multi-system its completeness for further unit cannot take analysis;...
  • Page 132 A Series Modular-type Air-cooled (Heat Pump) Chiller (1)Desolder connection pipes and then disconnect them with the main body of the valve; 3. Desolder (2)Do charge nitrogen during de- connection soldering; pipes. (3)Protection measures should be taken during soldering to prevent surrounding objects from being burnt out.

  • Page 133: Routine Repair

    A Series Modular-type Air-cooled (Heat Pump) Chiller Routine Repair 7.5.1 Repairs to Refrigerant Leakage When soapsuds often used to detect leakage of a refrigeration system is applied to possible leakage points. If there are bubbles, leaks occur and need repairs by brazing. If soapsuds does not work, an electronic leak detector is an alternative.

  • Page 134: Air Removal

    A Series Modular-type Air-cooled (Heat Pump) Chiller (2)Recharge refrigerant Fig 7-2 Charging process Excessive or deficient refrigerant may cause abnormal operation, malfunction or damage to a compressor, so charge volume must comply with the requirements on the unit name- plate which have been decided in strict tests; The figure may serve as a reference; a...

  • Page 135: Exploded Views And Part Lists

    Maintenance Significant of Maintenance The unit has undergone a series of strict tests prior to delivery to ensure qualified performance, however, in order to keep reliable performance and extend its service life, the unit should be maintained routinely and periodically by the qualified servicemen.
  • Page 136 A Series Modular-type Air-cooled (Heat Pump) Chiller Requirements on Water Quality Chilled/Hot water side Trend Item Circulat- Supply Corro- Scalelike ing water water sion sediment PH(25℃) 6.8-8.0 6.8-8.0 6.8-8.0 Conductivity (25℃) μs/cm <400 <300 mg(Cl <50 <50 　 Basic items...
  • Page 137 A Series Modular-type Air-cooled (Heat Pump) Chiller 1) let the water pump run for another 1-2 hours. 2) 1-2 hours later, change the cleaning solution to anti-rusting agent. Then, drain the water system and check the water quality. If water is cloudy, then it indicates the cleaning ef- fect is satisfactory.
  • Page 138 A Series Modular-type Air-cooled (Heat Pump) Chiller frozen up. Instead, the other way is adding some antifreeze into water to keep the water temperature no less than 0℃. See the following steps for how to drain water out. (1)Loosen screws on the front panel and then remove the front panel (2)Draw out the blind plug counter clockwise to let the chilled water flow out freely until no water stays in.

This manual is also suitable for:

Lsqwrf35vm/naa-mLsqwrf60vm/naa-mLsqwrf65vm/naa-m

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