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Related Manuals for Gree GMV-N12U/A-T(U)
Summary of Contents for Gree GMV-N12U/A-T(U)
- Page 1 Owner's Manual Original Instructions Commercial Air Conditioners AHU-KIT Models： GMV-N12U/A-T(U) GMV-N24U/A-T(U) GMV-N48U/A-T(U) GMV-N96U/A-T(U) GMV-N192U/A-T(U)
- Page 2 Preface For correct installation and operation, please read all instructions carefully. Before reading the instructions, please be aware of the following items: This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death. This mark indicates procedures which, if improperly performed, might lead to the death or serious injury of the user.
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Page 3: Table Of Contents
Contents 1 Safety Precautions ....................1 2 Product Introduction ....................3 2.1 Names of Key Components ....................3 2.2 Overall System Connection Diagram .................. 3 2.3 Standard Fittings ......................... 5 2.4 Specifications ........................5 2.5 Selecting the Air Handling Unit ................... 7 3 Preparations for Installation .................. -
Page 4: Safety Precautions
(18) User is not allowed to repair the unit. Fault service may cause electric shock or fire accidents. Please contact Gree appointed service center for help. (19) Before installation, please check if the power supply is in accordance with the requirements specified on the nameplate. - Page 5 (27) If anything abnormal happens (such as burning smell), please power off the unit and cut off the main power supply, and then immediately contact Gree appointed service center .If abnormality keeps going, the unit might be damaged and lead to electric shock or fire.
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Page 6: Product Introduction
AHU-KIT 2 Product Introduction 2.1 Names of Key Components Fig.2.1 ① ② Name Control Box EXV Box 2.2 Overall System Connection Diagram When one AHU-KIT is connected to one AHU, the connection diagram is as follows: Fig.2.2.1... - Page 7 AHU-KIT When several AHU-KITs (n≤2) are in parallel connection with one AHU, the connection diagram is as follows: Fig.2.2.2...
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Page 8: Standard Fittings
AHU-KIT 2.3 Standard Fittings Please use the supplied standard fittings listed below as instructed. Name Appearance Quantity Magnetic ring 1 or 2 Swell screw Self-tapping screw Operating Instruction Manual Wired controller Insulator aluminum tape rubber belt Fastener Reducer pipe（Only for 24, 96, 192 type） 2.4 Specifications Model GMV-N12U/A-T(U) - Page 9 AHU-KIT 1-Ph 208/230V Power Supply Ph /V /Hz 1-Ph 208/230V 60Hz 1-Ph 208/230V 60Hz 60Hz AHU-KIT Φ6.35 Φ6.35 Φ9.52 Φ9.52 Φ9.52 Φ9.52 Φ9.52 Φ9.52 (ex-factory pipe size) Size of Φ6.35 Φ6.35 Φ6.35 Φ9.52 Φ9.52 Φ9.52 Φ9.52 Φ9.52 Liquid pipe connecti on pipe handlin Φ9.52...
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Page 10: Selecting The Air Handling Unit
AHU-KIT Model(Combined) GMV-N48U/A-T(U)+GMV-N192U/A-T(U) Capacity 48+288 Cooling 98.48 Cooling kBtu/h Heating 110.79 Heating kBtu/h Power input 5.0+5.0 Power supply Ph /V/Hz 1-Ph 208/230V 60Hz Φ19.05 Liquid pipe Size of connection Air handling Φ34.9 pipe unit Gas pipe 1-3/8 (203×326×85)+(246×500×120) Electronic expansion valve (8×12-7/8×3-3/8)+(9-5/8×19-5/8×4-3/4) Outline dimension （W×D×H）... - Page 11 AHU-KIT Allowed Heat Allowed Heat Exchanger Suggested Air Capacity(kBtu/h) Capacity Exchanger Model(Combined) Flow(CFM) (kBtu/h) Volume(dm Cooling Heating 0.67 0.74 10.5 GMV-N12U/A-T(U) 0.78 0.94 10.5 13.5 0.94 1.17 13.5 GMV-N24U/A-T(U) 1.17 1.41 1.41 1.88 1.88 2.35 GMV-N48U/A-T(U) 2.35 2.82 1120 2.82 3.76 1490 3.76...
- Page 12 AHU-KIT Model(Combined) Capacity in application (kBtu/h) Capacity DIP GMV-N24U/A-T(U) GMV-N48U/A-T(U) GMV-N96U/A-T(U) GMV-N192U/A-T(U) GMV-N48U/A-T(U)+GMV-N192U/A-T(U) 48+288 (2) Connection method 2: one-to-more The AHU-KIT as below can adopt one-to-more connection method with VRF outdoor unit. Total capacity of AHU-KIT should be 50%~110% of that of outdoor unit. Model Capacity in application (kBtu/h) Capacity DIP...
- Page 13 AHU-KIT Model Capacity in application (kBtu/h) Capacity DIP GMV-N12U/A-T(U) GMV-N24U/A-T(U) GMV-N48U/A-T(U) GMV-N96U/A-T(U) NOTICE! When connecting AHU-KIT with general VRF indoor unit, capacity requirement shall be followed strictly. Otherwise, it may affect the operation, or even damage the unit. Fig.2.5.1 AHU-KIT one-to-one (single unit) connection diagram...
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Page 14: Preparations For Installation
AHU-KIT Fig.2.5.2 AHU-KIT one-to-one (combination outdoor unit) connection diagram Fig.2.5.3 AHU-KIT one-to-more (hybrid connection) connection diagram 3 Preparations for Installation 3.1 Before Installation NOTICE! Product graphics are only for reference. Please refer to actual products. Unspecified measure unit is mm(in.). (1) This equipment is designed for R410A system, and the designed working pressure is 3.8 MPa or 38 bar. -
Page 15: Location For Installation
AHU-KIT (2) Working Ambient Temp. Tmax=109℉(45 ° C) (3) Precautions for R410A: (4) a).The refrigerant requires strict cautions for keeping the system clean, dry and tight. (5) —Clean and dry：Foreign materials (including mineral oils or moisture) should be prevented from getting mixed into the system. (6) —Tight：Read this manual carefully and follow these procedures correctly. -
Page 16: Requirements For Communication Wire
AHU-KIT temperature inside the option boxes and may reduce its lifetime and influence its operation. (4) Choose a flat and strong mounting surface. (5) Make sure there is enough free space in front and in the side of the AHU-KIT unit for future maintenance. - Page 17 AHU-KIT 3.3.1 Selecting communication wire for AHU-KIT and wired controller Total length of communication wire Wire type Wire diameter (AWG) Remark between indoor unit and wired controller (m/ft.) 1. Total length of communication cable can't exceed 250m (850ft.). 2. The cord shall be Circular Light/Ordinary polyvinyl cord (the cores shall be twisted together).
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Page 18: Wiring Requirements
AHU-KIT 3.3.2 Select Communication wire for AHU-KIT and Outdoor Unit Fig.3.3.3 Total length of communication wire Wire Wire type between indoor unit and indoor unit diameter Remark (outdoor unit) (m/ft.) (AWG) 1. If the wire diameter is enlarged to 18AWG, the total communication cable length can reach 1500m (4920 ft.). -
Page 19: Piping Requirements
AHU-KIT Use copper wire only as unit’s power cord. Operating temperature should be within its rated value ① Above selection requirements: Power cord size is based on BV single-core wire (2~4pc) at 40° C(104 ℉)ambient temperature when laying across plastic pipe. Air switch is D type and used at 40° C(104℉). If actual installation condition varies, please lower the capacity appropriately according to the specifications of power cord and air switch provided by manufacturer. - Page 20 AHU-KIT When several AHU-KITs are connected to one AHU, the piping diagram is as follows: Fig.3.5.2 Several AHU-KITs to one AHU 3.5.2.1Selection of Branch Pipe (1) Branch pipes (a, b) between outdoor units shall be selected according to the total capacity of outdoor unit ,as follows: Model Selection of branch pipe between ODU modules...
- Page 21 AHU-KIT 3.5.2.2 Selection of Piping Dimension Piping dimension can be selected according to the total rated capacity of upstream or downstream modules. Detailed requirements are as below: (1) Piping (A, B, C) from ODU to branch pipe shall be selected according to the rated capacity of ODU;...
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Page 22: Capacity Setting
AHU-KIT 3.6 Capacity Setting Capacity ranges of different AHU-KIT unit are as follows: Model Acquiescent capacity (kBtu/h) Adjustable capacity(kBtu/h) GMV-N12U/A-T(U) 9/12 GMV-N24U/A-T(U) 15/18/24 GMV-N48U/A-T(U) 30/36/48 GMV-N96U/A-T(U) 72/96/120/144 GMV-N192U/A-T(U) 168/192/288 Different capacities of same model of AHU-KIT unit are achieved through dialing capacity code of mainboard (shown as "S1").Capacity code setting is shown as follows: Capacity (kBtu/h) -
Page 23: Installation Instructions
AHU-KIT ① The selected air handling unit must be designed for R410A ② Extraneous substances (including mineral oils or moisture) must be prevented from getting mixed into the system. 4 Installation Instructions 4.1 Unit Dimensions and Maintenance Space (1) Size of control box for GMV-N12U/A-T(U)、GMV-N24U/A-T(U) 、GMV-N48U/A-T(U)、 GMV-N96U/A-T(U) and GMV-N192U/A-T(U) (Unit: mm(in.)): Fig.4.1.1 (2) Size of EXV box for GMV-N12U/A-T(U)、... - Page 24 AHU-KIT Fig.4.1.2 (3) Size of EXV box for GMV-N192U/A-T(U) (Unit: mm(in.)): Fig.4.1.3...
- Page 25 AHU-KIT Maintenance space of control space (Unit: mm(in.)): Fig.4.1.4 Maintenance space of EXV box (Unit: mm(in.)): Fig.4.1.5...
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Page 26: Exv Installation
AHU-KIT 4.2 EXV Installation 4.2.1 Mechanical Installation (1) Remove the EXV box cover by unscrewing screws. (2) Drill 4 holes on correct position (measurements as indicated in figure below) and fix the valve kit box securely with 4 screws through the provided holes 12mm(1/2 in.). ①... - Page 27 AHU-KIT (1) Make sure there is nitrogen protection during welding. Brazing without carrying out nitrogen replacement or releasing nitrogen into the piping will create large quantities of oxidized film on the inside of the pipes, adversely affecting valves and compressors in the refrigerating system and preventing normal operation.
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Page 28: Installation Of The Exv Cable
AHU-KIT a corresponding slot(see circuit diagram). (2) Using bundles to fix the magnetic ring is required. It’s also need to insert the bundle into the reserved hole on the control box. (3) Fixing the cable with the wire clamp, and tightening the Cable-Cross Loop. (4) Fix the magnetic ring to the reserved hook fixing inside electrical box with high-temperature bonding tie. - Page 29 AHU-KIT Fig.4.4.1 When several AHU-KITs are connected to one AHU, the piping installation diagram is as follows: Fig.4.4.2 NOTICE! A: When the air handling unit is installed at the top of the EXV box, vertical distance between the bottom of the air handling unit to the EXV box is no more than 2 m; if the air handling unit is installed under the EXV box, vertical distance between the bottom of the air handling unit to the EXV box is no more than 2 m.
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Page 30: Installation Of The Control Box
AHU-KIT 4.5 Installation of the Control Box Fig.4.5.1 (1) Fix the control box with its hanger brackets to the mounting surface. (2) Open the lid of the control box. (3) For electrical wiring: refer to the following contents. (4) Install the screw nuts. (5) Close the unnecessary openings. - Page 31 AHU-KIT Precautions: ① Temperature sensor cable and remote controller wire should be kept away from power cable in a distance of at least 50(mm).Violating this rule may generate electric noise and lead to malfunctions. ② Use wires as specified and connect them tightly with wiring terminals. Keep the wires in order and do not obstruct other devices.
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Page 32: Installation Of The Temperature Sensors
AHU-KIT ① The H, M, L of fan gear lines and the 1, 2 of Lines of fault signal from external feedback are shorted by the factory default. ② Neutral line of fan connects to the N. It can be connected to any of them (H, M, L) when there is only one gear. Disconnect the short cable between H and M when there are two gears, then connect the high gear cable to H, and connect low gear cable to either M or L. - Page 33 AHU-KIT Fig.4.6.1 ① IN Temp. sensor (Liquid Temp. sensor) ② OUT Temp. sensor (Gas Temp. sensor) Installation of the temperature sensor cable： (1) The length of temperature sensor wire is 10 m. (2) Put the temperature sensor cable in an individual protective tube. (3) Apply stress release in the temperature sensor wire to prevent the temperature sensor wire from getting loose due to stress.
- Page 34 AHU-KIT ③ Fix the temperature sensor with insulating aluminum tape in order to ensure good heat transference. ④ Cover the temperature sensor with rubber belt to prevent looseness of temperature sensor. ⑤ Use two wire ties to bind the temperature sensor securely. ⑥...
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Page 35: Installation Of Wired Controller
AHU-KIT ① For connection to outdoor unit and to AHU-KIT unit: Pull the wires inside through the screw nut and close the nut firmly in order to ensure a good pull relieve and water protection. ② The cables require an additional pull relief. Fixing the cable with the wire clamp. ③... -
Page 36: Wire Connection
AHU-KIT 5 Wire Connection ① Units must be earthed securely, or it may cause electric shock. ② Please carefully read the wiring diagram before carry out the wiring work, incorrect wiring could cause malfunction or even damage the unit. ③ The capacity of power supply should be big enough. ④... -
Page 37: Power Cord Connection
AHU-KIT multiple twisted wires single banch wire wiring terminal insulation layer Fig.5.1.1 Fig.5.1.2 5.2 Power Cord Connection NOTICE! Each indoor unit must be installed with a independent circuit breaker for short-circuit protection and overload protection. In general, this circuit breaker is under close status. During operation process, all indoor units and outdoor units in one system must be energized. -
Page 38: Connection Of Communication Wire Between Indoor Unit And Outdoor Unit (Or Indoor Unit)
AHU-KIT (3) Connect the power cord to terminal “L1, L2, ”. (4) Fix the power card with wiring clamp. Power connection diagram for several AHU-KITs in parallel connection with one AHU: Fig.5.2.2 For units with single-phase power supply: (1) Detach the electric box lid. (2) Let the power cord pass through the wiring through-holes. -
Page 39: Connect Communication Wire Of Wired Controller
AHU-KIT Fig.5.3.1 Fig.5.3.2 5.4 Connect Communication Wire of Wired Controller (1) Open electric box cover of indoor unit. (2) Let the communication wire go through the rubber ring. (3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit wiring board. (4) Fix the communication wire with wire clip on the electric box. - Page 40 AHU-KIT in fig.5.5). (1) The type of indoor units must be the same if they are controlled by the same wired controller. (2) When the indoor unit is controlled by two wired controllers, the addresses of the two wired controllers should be different through address setting.
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Page 41: Statement On Linkage Function Setting
AHU-KIT 6 Statement on linkage function setting When several AHU-KITs are in parallel connection with one AHU, you must activate linkage function after installation for normal operation. Setting way is as below: Step 1: Set group control IDU quantity After making sure all AHU-KITs are energized, set AHU-KIT quantity through wired controller P14, detailed operation is as follows: Under on or off status, press “Function”... -
Page 42: Test Operation
AHU-KIT 7.2 Test Operation Before executing "test operation" as well as before operating the unit, you must check the following: (1) Refer to the section of "For the following items, take special care during construction and check after installation is finished". (2) Ensure the construction of refrigerant piping, drain piping and electric wiring are finished. -
Page 43: Disposal Requirements
AHU-KIT 7.3.2 Maintenance After the Seasonal Use (1) Set the unit in fan mode for half a day in a sunny day to dry the inner part of unit. (2) When the unit won’t be used for a long time, please cut off power supply for energy saving;... - Page 44 AHU-KIT 9 Troubleshooting If your air conditioner is not working well, please check the following table first before asking for service: Phenomenon Troubleshooting ① No power supply. ② Circuit breaker is tripped because of current leakage. The unit can’t start ③...
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