Nortek GKU18USV4DH Installation Instructions & Owner'S Manual Download Page 1

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Nortek Global HVAC, LLC

Installation Instructions / Owner's Manual

Heat Pump

Please read this owner’s manual carefully before operation and retain it for future reference

Specifications & illustrations subject to change without notice or incurring obligations

Indoor Unit

Outdoor Unit

GKU18(5.3)USV4DH

GXH18(5.3)USV4DH

GKU24(7.0)USV4DH
GKU30(8.8)USV4DH

GXH24(7.0)USV4DH
GXH30(8.8)USV4DH

GKU36(10.6)USV4DH GXH36(10.6)USV4DH
GKU42(12.3)USV4DH
GKU48(14.1)USV4DH

GXH42(12.3)USV4DH
GXH48(14.1)USV4DH

DC Inverter U-Match Series
Cassette Type Unit

Summary of Contents for GKU18USV4DH

Page 1: ...Specifications illustrations subject to change without notice or incurring obligations Indoor Unit Outdoor Unit GKU18 5 3 USV4DH GXH18 5 3 USV4DH GKU24 7 0 USV4DH GKU30 8 8 USV4DH GXH24 7 0 USV4DH GXH...

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Page 3: ...nit 9 4 1 Installation of the Indoor Unit 9 4 2 Installation of the Outdoor Unit 13 4 3 Installation of the Connection Pipe 14 4 4 Vacuum and Gas Leakage Inspection 18 4 5 Installation of the Drain Ho...

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Page 5: ...work may cause electrical shock or fire 8 Be sure to use a dedicated power circuit Never use a power supply shared by another appliance 9 For wiring use a single length of cable with no connections Do...

Page 6: ...fire A high surge current from lightning or other sources may cause damage to the air conditioner 18 Be sure to install ground fault interrupter Failure to install a ground fault interrupterr may res...

Page 7: ...C Inverter U match Series Cassette Type Unit 3 2 Outline of the Unit and Main Parts Fig 2 1 The connection pipe drain pipe power cord and duct for this unit should be prepared by a qualified technicia...

Page 8: ...et of the unit for 24k 48k units 3 Washer 10 To be used together with the hanger bolt for installing the unit for 24k 48k units 4 installation template 1 Used for ceiling drilling 5 Gasket mounting bo...

Page 9: ...an installation site where the following conditions are fulfilled and that meets your customer s approval 1 No obstruction should block the air inlet or outlet vents 2 Make sure that the installation...

Page 10: ...withstand high wind If possible do not install the unit where it will be exposed to direct sunlight If necessary install a blind that does not interfere with the air flow 1 Install the outdoor unit in...

Page 11: ...ipe Requirement The maximum length of the connection pipe is listed in the Table below Table 3 4 Item Model Size of Fitting Pipe mm inch Max Pipe Length m feet Max Height Difference between Indoor Uni...

Page 12: ...08 230V 60Hz 5 1 15 GKU24 7 0 USV4DH 208 230V 60Hz 5 1 15 GKU30 8 8 USV4DH 208 230V 60Hz 5 1 5 15 GKU36 10 6 USV4DH 208 230V 60Hz 5 1 5 15 GKU42 12 3 USV4DH 208 230V 60Hz 5 1 5 15 GKU48 14 1 USV4DH 20...

Page 13: ...power cord of 0 75mm2 AWG18 as the communication lines between the wired controller and the indoor unit with their longest lengths of 30m 98 feet Please select the appropriate line length as per the...

Page 14: ...2 Unit mm inch Item Model A B C D E F G H I GKU24 7 0 USV4DH 950 37 3 8 840 33 1 8 780 30 3 4 680 26 3 4 160 6 1 4 240 9 1 2 915 36 215 8 1 2 993 39 1 8 GKU30 8 8 USV4DH 950 37 3 8 840 33 1 8 780 30 3...

Page 15: ...842 33 1 8 788 31 170 6 3 4 290 11 3 8 4 1 2 Installing the Main Body Unit Fig 4 2 1 Install the hoisting stand on the hoisting screw by using nuts and gaskets at both the upper and lower sides of th...

Page 16: ...Using the installation template drill holes for bolts four holes Fig 4 3 2 Install the bolts to the ceiling at a place strong enough to hang the unit Mark the bolt positions from the installation temp...

Page 17: ...790 31 1 8 610 24 395 15 1 2 GXH30 8 8 USV4DH GXH36 10 6 USV4DH 1105 43 5 8 440 17 3 8 1100 43 1 4 630 24 7 8 400 15 3 4 GXH42 12 3 USV4DH 960 37 3 4 410 16 1 4 1350 53 1 8 570 22 1 2 375 14 3 4 GXH48...

Page 18: ...emove the burrs 2 Hold the pipe downward to prevent cuttings from entering the pipe 3 Remove the flare nut from the stop valve on the outdoor unit Get another flare nut from the accessory bag for the...

Page 19: ...o attach the pipe on the indoor unit correctly Center the flare nut on the fitting before tightening Do not force the nut to turn or the threads will be damaged and the system will leak Do not remove...

Page 20: ...inch 60 65N m 44 48ft lb Be sure to connect the gas pipe after connecting the liquid pipe completely 4 3 4 Connecting the Pipe at the Outdoor Side Unit Tighten the flare nut of the connection pipe at...

Page 21: ...ig 4 14 4 3 7 Liquid Pipe and Drain Pipe 1 If the outdoor unit is installed lower than the indoor unit See Fig 4 15 1 A drain pipe should terminate above ground level without being submersed into wate...

Page 22: ...alves should be kept closed in case of refrigerant leak 3 Connect the hose used for evacuation to the vacuum pump 4 Open the switch at the lower pressure side of the manifold valve assembly and start...

Page 23: ...as valve and service port Fig 4 17 Note For the large sized unit it has the service port for both the gas valve and the liquid valve During evacuation it is possible to connect two hoses of the manifo...

Page 24: ...sible and slope it downwards at a gradient of at least 1 100 so that air may not remain trapped inside the pipe 2 Keep pipe size equal to or greater than that of the connecting pipe 3 Install the drai...

Page 25: ...e Metal clamp Drain hose accessory Grey tape accessory Indoor Unit A GKU18 5 3 USV4DH 10 2mm 3 8 1 16inch GKU24 7 0 USV4DH 15 3mm 9 16 2 16inch GKU30 8 8 USV4DH GKU36 10 6 USV4DH GKU42 12 3 USV4DH GKU...

Page 26: ...of drainage main pipe The horizontal pipe cannot be connected to the vertical pipe at a same height It must be connected in a manner as shown below NO 1 Attach the 3 way connection of the drainage pip...

Page 27: ...pipe To accomplish this mount supporting brackets at an interval of 1 1 5m 3 5feet Fig 4 28 4 5 4 Testing of Drain Piping After piping work is finished check if drainage flows smoothly Shown in the F...

Page 28: ...24 Fig 4 30 4 6 The Panel Installation 4 6 1 Precautions 1 See the Figure below for the relationship of the front panel and the connecting pipe Fig 4 31 2 Panel must be securely fastened or condensate...

Page 29: ...lap motor and lamps to the main body according to the size of Terminals and the connection cord color as shown in Fig 4 34 Fig 4 34 4 6 2 Installing the Panel 1 Place the panel at the unit and latch t...

Page 30: ...fy that the voltage is within the 187 252V range for single phrase units Always use a dedicated branch circuit and install a dedicated receptacle to supply power to the air conditioner Use a dedicated...

Page 31: ...about 25mm 1inch 2 Using a screwdriver remove the terminal screw s on the terminal board 3 Using pliers bend the solid wire to form a loop suitable for the terminal screw 4 Shape the loop wire properl...

Page 32: ...and outdoor unit Match the terminal block numbers and connection cord colors with those of the indoor unit side Improper wiring may damage the electric parts Connect the connection cords firmly to the...

Page 33: ...DC Inverter U match Series Cassette Type Unit 29 Single phase units 36k 42k...

Page 34: ...verter U match Series Cassette Type Unit 30 Single phase units 48k Fig 4 39 5 Electric wiring of indoor unit Remove the cover from the electric box sub assy and then connect the wire For the units 18k...

Page 35: ...DC Inverter U match Series Cassette Type Unit 31 For the units 48k Fig 4 40...

Page 36: ...indoor outdoor connection cord and power cord respectively on the terminal boards with screws Faulty connection may cause a fire If the indoor unit connection cord to the outdoor unit and power supply...

Page 37: ...or high discharge temperature protection 5 E6 Communication error 6 E8 Indoor fan motor error 7 E9 Full water protection 8 F0 Indoor ambient temperature sensor error 9 F1 Evaporator temperature sensor...

Page 38: ...error 33 P8 Drive module over temperature protection 34 P9 Zero passage protection 35 PA AC current protection 36 Pc Drive current error 37 Pd Sensor connecting protection 38 PE Temperature drift pro...

Page 39: ...the nearby Test button simultaneously for five seconds when the unit is Off 6 2 Working Temperature Range Table 6 2 Test Condition Indoor Side Outdoor Side DB C WB C DB C WB C Nominal Cooling 26 7 80...

Page 40: ...y or blocked There is heat source or too many people inside the room The door or window is open There is obstacle at the air intake or outlet The set temperature is too high There is refrigerant leaka...

Page 41: ...the risk of electrical shock or fire Increase the frequency of cleaning if the unit is installed in a room where the air is extremely dirty You can begin by cleaning the filter every six months then i...

Page 42: ...purifier Remove the air purifier after removing the fixed screws on it 5 Clean the filer screen Clean the filer screen with a vacuum cleaner or wash it with cool water Clean the filter using warm wat...

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