Nortek Flex Match Series Owner's Manual

Cassette type indoor unit

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Nortek Global HVAC, LLC

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

Flex Match Series

Cassette Type Indoor Unit

(For North America)

Owner's Manual

Heat Pump

Models:

GKH24(7 7 .0)FMK4DH

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Page 1 Nortek Global HVAC, LLC Flex Match Series Cassette Type Indoor Unit (For North America) Owner's Manual Heat Pump Models: GKH24(7 7 .0)FMK4DH 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...
Page 2 User Notice ◆ The total capacity of the indoor units connected can not exceed 150% of that of the outdoor units. ◆ A breaker (or fuse) needs to be installed for each indoor unit, and the capacity should match indoor unit’s electrical specifications. All the indoor units are required to have a dedicated power supply and disconnect switch so that electric power supply can be turned off to all units in case of an emergency.
Page 3: Table Of Contents
Contents 1 Safety Precautions ..................19 2 Installation of the Cassette Type Indoor Unit ........... 2 2.1 Schematic Diagram of Installation Spaces ............2 2.2 Installation Location of the Indoor Unit ..............2 2.3 Important Notice: ....................3 2.4 Dimension of Ceiling Opening and Location of the Hoisting Screw (M10) .... 3 2.5 Main Body of Hoisting Air Conditioner ..............
Page 4: Safety Precautions
Flex Match 1 Safety Precautions Please read this manual carefully before using and operating correctly as instructed in this manual. Please note the following indicators.: Warning!: Failure to comply could result in property damage, serious personal injury or death. Caution! Failure to comply could result in property damage or personal injury. Warning: ◆...
Page 5: Installation Of The Cassette Type Indoor Unit
Flex Match 2 Installation of the Cassette Type Indoor Unit 2.1 Clearances Wall surface Wall Wall surface surface ≥1500mm (5 ft) ≥1500mm (5 ft) unit:mm Model GKH24(7.0)FMK4DH Ground surface Fig. 1 2.2 Selecting a Location for the Indoor Unit (1). Unit should be placed so that air flow throughout the room is not obstructed. (2).
Page 6: Important Notice
Flex Match 2.3 Important Notice: ◆ To guarantee the good performance, the unit must be installed by professional personnel according with this manual. ◆ To the installer: Contact the manufacturer’s representatives if you have any question about installing this equipment. 2.4 Dimension of Ceiling Opening and Location of the Hoisting Screw (M10) Refrigerant pipe Hoisting screw (X4)
Page 7: Main Body Of Hoisting Air Conditioner
Flex Match 2.5 Hoisting Air Conditioner (1). The primary step for installing the indoor unit. ◆ When attaching the hoisting stand on hoisting screw, do use nut and gasket individually at the upper and lower of the hoisting stand. The use of gasket anchor board can prevent gasket break.
Page 8: Connection Of The Refrigerant Pipe
Flex Match 2.6 Connection of the Refrigerant Pipe ◆ When connecting the pipe to the unit use a wrench and torque wrench as shown in Fig. 5. ◆ Spread refrigerant oil lubricant to inside and outside of flare nut. Begin turning flare nut by hand, then tighten with a wrench.
Page 9 Flex Match ◆ Drain hose should be as short as possible with sloping gradient should at least 1/100 to prevent the formation of air bubble. ◆ If drain hose cannot have sufficient slope, a drain raising pipe should be added. ◆...
Page 10 Flex Match Instruction ◆ The slope gradient of the attached drain hose should be within 75mm (3 in) so that the drain hole doesn’t isn’t exposed unnecessary stress. Fig. 9 ◆ If drain hoses from several units are being installed together, please install according to the following diagram.
Page 11: Electrical Wiring
Flex Match 2.8 Electrical wiring Note: The supply power for all indoor unit must be connected to outdoor unit. ◆ Please see the wiring diagram included with the unit. ◆ All the installation of electrical wiring must be done by professional personnel. ◆...
Page 12 Flex Match RXH36(10.6)FMV4DH POWER INDOOR UNIT B INDOOR UNIT D INDOOR UNIT C INDOOR UNIT A OUTDOOR UNIT...
Page 13: Install The Panel
Flex Match RXH42(12.3)FMV4DH POWER 2.9 Install the Panel 1. Set the panel to the indoor unit body by matching the position of the swing flap motor of the panel to the piping position of the panel to the piping position of the indoor unit as shown by Fig. 2.
Page 14 Flex Match (2). Hang the remaining 2 latches to the hooks on the sides of the indoor unit. (Be careful not to let the swing motor lead wire get caught in the sealing material.) (3). Screw the 4 hexagon head screws under the latches in about 15mm (1/2 in). (The panel will rise) (4).
Page 15 Flex Match Notes: ① . I mproper installation of the screws may cause condensate dripping as shown in Fig. 14. Air leak Air leak from ceiling Water condensatation, water drop Fig. 14 If gap still exist between ceiling and decoration panel after tightening the screws, readjust ①...
Page 16: Parts And Components Of Cassette Type Indoor Unit
Flex Match At body At pane At body At pane Fig. 16 3 Identification of Parts of Cassette Type Indoor Unit Drainage equipment (inside type) Discharge cindensate water from indoor unit when cooling Drainage hose Guide louver (placed in air outlet vent) Air outlet vent Connecting pipe...
Page 17: Working Temperature Range
Flex Match 4 Working Temperature Range Working Temperature Range Indoor side state ℉（℃） Outdoor side state ℉（℃） Dry bulb Wet bulb Dry bulb Wet bulb temp. ℉（℃） temp. ℉ （℃） temp. ℉ （℃） temp. ℉ （℃） Rated. Cooling 80.0(26.7) 67.0(19.4) 95.0(35.0) 75.0(23.9) Max.
Page 18: Troubleshooting
Flex Match 5 Troubleshooting Warning! ◆ Turn off main power immediately if malfunction is detected, or if you smell a burning odor coming from the air conditioner. Failure to shut down unit could result in further equipment damage, electrical shock or fire. ◆...
Page 19: Maintenance Method
Flex Match ★ Instruction If problem still cannot be solved after above checking, please contact service center. ★ The following circumstances are not malfunctions “Malfunction” Reason Doesn't start up unit immediately The overload protects switch after turned off requires a 3 minutes delay. Air conditioner doesn’t run Doesn't start immediately when 1 minute delay after startup...
Page 20 Flex Match (1). Open air inlet grille Pull the 2 handles on air inlet grille at the same time with the direction showed by arrow in Fig. 18, pull it down slowly. (Reverse when closing) (2). Disassemble air filter As shown in Fig. 19, pull the handle behind air inlet grille, raise it and disassemble. Then remove the 3 purifiers on the filter.
Page 21: Clean Air Inlet Grille
Flex Match 6.2 Clean Air Inlet Grille (1). Open air inlet grille (the same with the 1st step of Clean Air Filter) (2). Take out air filter (the same with the 2nd step of Clean Air Filter) (3). Take out air inlet grille Open air inlet grille for an angle of 45°, as shown in Fig.
Page 22: Clean Outlet Vent And Surface Panel
Flex Match 6.4 Clean Outlet Vent and Surface Panel ◆ Clean the surface panel with soft dry cloth or damp cloth with mild detergent. ◆ Do not clean surface panel with gasoline, benzene, cleansing powder, etc. ◆ If the guide louver is too dirty, it may be removed to be cleaned. (As described below) Disassembly and installation of guide louver (1).

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Flex match gkh24(77.0)fmk4dh

Nortek Flex Match Series Owner's Manual

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