Nortek GFU18USV4DH 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

If you have lost the owner’s manual, please visit www.NortekHVAC.com for electronic

version

Indoor Unit

Outdoor Unit

GFU18(5.3)USV4DH GXH18(5.3)USV4DH
GFU24(7.0)USV4DH
GFU30(8.8)USV4DH

GXH24(7.0)USV4DH
GXH30(8.8)USV4DH

GFU36(10.6)USV4DH GXH36(10.6)USV4DH
GFU42(12.3)USV4DH
GFU48(14.1)USV4DH

GXH42(12.3)USV4DH
GXH48(14.1)USV4DH

DC Inverter U-match Series
Floor Ceiling Type Unit

Summary of Contents for GFU18USV4DH

Page 1: ...ithout notice or incurring obligations If you have lost the owner s manual please visit www NortekHVAC com for electronic version Indoor Unit Outdoor Unit GFU18 5 3 USV4DH GXH18 5 3 USV4DH GFU24 7 0 U...

Page 2: ......

Page 3: ...ement 6 4 Unit Installation 7 4 1 Indoor Unit Installation 7 4 2 Outdoor Unit Installation 11 4 3 Connection Pipe Installation 12 4 4 Vacuum and Gas Leakage Inspection 16 4 5 Drain Pipe Installation 1...

Page 4: ...til all installation work is complete 8 During installation make sure that the refrigerant pipe is securely attached before you run the compressor z Do not operate the compressor with 2 way or 3 way v...

Page 5: ...DC Inverter U match Series Floor Ceiling Type Unit 2 Fig 2 1 Installer must properly connect refrigeration pipe drain pipe power cord and ductwork 3 Pre Installation Check List...

Page 6: ...cure the hook on the cabinet of the unit 2 Wireless Controller Battery 1 2 To control the indoor unit 3 Insulation 1 To insulate the gas pipe 4 Insulation 1 To insulate the liquid pipe 5 Fastener 4 To...

Page 7: ...ust not operate the unit Decide the installation location with the customer as follows 3 2 1 Indoor Unit 1 Check the support structure to verify that it has sufficient load carrying capacity to suppor...

Page 8: ...where the condensate water can be drained out freely during heating operation 4 Do not place animals and plants in the path of the warm air 5 Select a location where sound and vibration will have lit...

Page 9: ...V4DH 9 5 3 8 16 5 8 50 164 15 49 17X1 75 5 8 X 1 16 GFU48 14 1 USV4DH GXH48 14 1 USV4DH 9 5 3 8 16 5 8 70 230 15 49 17X1 75 5 8 X 1 16 Notes The connecting pipe should be thermally insulated The pipe...

Page 10: ...G18 as the communication lines between indoor and outdoor unit with their longest lengths of 50m 164feet Please select the appropriate line length per the actual installation conditions The communicat...

Page 11: ...ig 4 1 Table 4 1 Unit mm inch Model A B C D H GFU18 5 3 USV4DH GFU24 7 0 USV4DH 1220 48 225 8 7 8 1160 45 5 8 280 11 700 27 1 2 GFU30 8 8 USV4DH GFU36 10 6 USV4DH GFU42 12 3 USV4DH 1420 55 7 8 245 9 5...

Page 12: ...template Fig 4 2 2 Insert the anchor bolts into the drilled holes and drive the pins completely into the anchor bolts with a hammer 3 Remove the right and left side panels 4 Put the hanger bolt into t...

Page 13: ...ig 4 4 6 Adjust the height of the unit to make the drain pipe slant slightly downward so that the drainage will become much smoother 4 1 4 Leveling The water level test must be done after installing t...

Page 14: ...5 16 3 4 790 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...

Page 15: ...ownward 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 indoor unit Insert pipe through f...

Page 16: ...or 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 the flare nut until the conne...

Page 17: ...5mm 3 8inch 35 40N m 26 29ft 1b 12 7mm 1 2inch 45 50N m 33 37ft 1b 16mm 5 8inch 60 65N m 44 48ft 1b Be sure to connect the gas pipe after connecting the liquid pipe completely 4 3 4 Connecting the Pip...

Page 18: ...ler heat insulation large and small to the pipe connections Fig 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 t...

Page 19: ...of the unit s gas valve The gas and liquid valves 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 si...

Page 20: ...8 Replace the caps of the liquid valve gas 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 pos...

Page 21: ...ipe Installation 1 4 5 1 Precautions 1 Keep piping as short as possible 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...

Page 22: ...ipe clamp and the drain hose using heat insulation sponge Fig 4 23 Metal clamp Insulation sponge Note Step 1 to Step 3 have been finished by the manufacturer 4 If drain hose requires extension obtain...

Page 23: ...6 Electrical Wiring 4 6 1 Wiring Precautions Before obtaining access to terminals all supply circuits must be disconnected The rated voltage of the unit is as shown as Table 3 4 and Table 3 5 Before t...

Page 24: ...will need to be adjusted 4 6 2 Electrical Wiring 1 For solid core wiring Fig 4 26 1 Cut the wire end with a wire cutter or wire cutting pliers then strip the insulation about 25mm 1inch 2 Using a scre...

Page 25: ...rk check that power is not being supplied to the indoor unit and outdoor unit Match the terminal block numbers and connection cord colors with those of the indoor unit side Faulty wiring may damage th...

Page 26: ...e indoor and outdoor units Single phase units 18k 30k Single phase units 36k 48k Fig 4 29 5 Electric wiring of indoor unit side Remove the left cover plate and the electric box cover then insert the e...

Page 27: ...e 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 supp...

Page 28: ...3 E3 Compressor low pressure protection refrigerant lack protection and refrigerant colleting mode 4 E4 Compressor high discharge temperature protection 5 E6 Communication error 6 E8 Indoor fan motor...

Page 29: ...rol and drive 32 P7 Drive module sensor 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...

Page 30: ...ominal Heating 21 1 70 0 15 6 60 0 8 33 47 0 6 11 43 0 Rated Cooling 26 7 80 0 19 4 67 0 46 1 115 0 23 9 75 0 Low Temp Cooling 19 4 67 0 13 9 57 0 18 0 0 Rated Heating 26 7 80 0 23 9 75 0 18 3 65 0 Lo...

Page 31: ...C 115 F Poor cooling performance The air filter is dirty 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 Th...

Page 32: ...rille Unfasten two tabs on the grille as shown on the picture Remove the screws under the tabs with a screwdriver and open the inlet grille 2 Clean the filer screen Clean the filer screen by a vacuum...

Page 33: ...s controller need replacing 4 Check if the air filter is properly installed If the unit has not been used for an extended period of time the power supply must be turned on for 8 hours to heat up the O...

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