Nortek Flex Match Series Bedienungsanleitung

Nortek Global HVAC, LLC

Flex Match Series

(For North America)

Heat Pump

Owner's Manual

Models:

GKH24(77.0)FMK4DH

Cassette Type Indoor Unit

●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

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 specications. 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. The breaker (or fuse) on each indoor unit prevents short circuit and overload. The

main switch controls the power supply of all the indoor units. Before cleaning and maintaining the

indoor units, it is very important to turn off the main power supply switch.

◆Main power to compressor must be turned on 8 hours before air conditioner can be

operated.

◆ After receiving the turn off signal, indoor units will continue to run for 20-70 seconds. This

clears the unit of conditioned (heated or cooled) air.

◆ When the selected operating mode of the indoor unit conicts with the operating mode of the

outdoor unit, the malfunction light will blink after 5s on the wired controller. The air conditioner will

turn off. To restart, the operating modes must be reconciled: The HEAT mode conicts with of the

COOL mode, DRY mode and FAN mode; while the COOL mode, DRY mode and FAN mode are

compatible between each other. If there is a power outage when the unit is running, three minutes

after power recovery, the indoor unit will send the “start” signal to the outdoor unit.

◆The appliance shall not be installed in the laundry.

◆ An all-pole disconnection switch having a contact separation of at least 3mm (1/8 in) in all

poles should be connected in xed wiring.

◆ Main switch provided by end user: it can be locked in “OFF” position with padlock.

◆ The main disconnect device should be as detailed in disconnect user manual at a

recommended of 0.6-1.7m (2-5 ft). over current protection is required(UL 1995,CSA C22.2).

◆ The cooling range of the unit is the outdoor environment temp.-5~48°C (23~118°F) DB,

the heating range of the unit (only for the heat pump type unit) is the outdoor environment temp.

-15~27°C (5~80°F) WB.

◆ This appliance is not intended for use by persons (including children) with reduced physical,

sensory or mental capabilities, or lack of experience and knowledge. Children should not play with

the appliance.

This product must not be disposed with the domestic waste. Please dispose or recycle

responsibly.

Please keep this manual for future reference.

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 ................................................................... 4

2.6 Connection of the Refrigerant Pipe........................................................................ 5

2.7 Drain Hose ............................................................................................................. 5

2.8 Electrical wiring ...................................................................................................... 8

2.9 Install the Panel ...................................................................................................10

3 Parts and Components of Cassette Type Indoor Unit ................................. 13

4 Working Temperature Range......................................................................... 14

5 Trouble Shooting ........................................................................................... 15

6 Maintenance Method..................................................................................... 16

6.1 Cleaning Air Filter................................................................................................. 16

6.2 Clean Air Inlet Grille ............................................................................................. 18

6.3 Install and Change of Air Purier ......................................................................... 18

6.4 Clean Outlet Vent and Surface Panel ..................................................................

6.5 Maintenance before or after Seasonal Use .........................................................

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:

◆ Select a circuit breaker or fuse with approved capacity, or malfunction or re may occur.

◆ If you notice a burning smell or other foul odor, turn off the main power supply immediately.

◆ All room should be sufciently ventilated for better indoor air quality.

◆ Don’t insert nger or other objects into the air inlet/outlet grille.

◆ Check the support structure to verify that it has sufcient load-carrying capacity to support

the weight of the unit, and it can be securely mounted.

◆ Don’t apply or spray paint, insecticide or other flammable liquids on the surface of unit,

otherwise, re may occur.

◆ Once air conditioner is installed, it should not be removed and installed in a different location.

An all-pole disconnection switch having a contact separation of at least 3mm (1/8 in) in

all poles should be connected in xed wiring.

Note:

◆ Before using the unit, please check if the piping and wiring are properly installed to avoid

water leakage, refrigerant leakage, electric shock, or re.

◆ The main power supply must be grounded to avoid electric shock. Do not connect the

ground wire to the gas pipe, running water pipe, lightening rod or phone cable.

◆ Do not turn off the unit after it runs at least ve minutes; otherwise its service life will be

shortened.

◆Don’t allow children operate the air conditioner.

◆Do not operate this unit with wet hands.

◆

Turn off the main power supply before cleaning of the unit or replacing the air lter.

◆ If the unit is not to be used for a long time, turn off the main power supply.

Flex Match

2 Installation of the Cassette Type Indoor Unit

2.1 Clearances

unit:mm

Wall

surface

Wall

surface

Wall

surface

Ground

surface

260mm

(10-1/4 in)

Model GKH24(7.0)FMK4DH

>20mm

(3/4 in)

≥1800mm

(6 ft)

≥1500mm

(5 ft)

≥1500mm

(5 ft)

Fig. 1

2.2 Selecting a Location for the Indoor Unit

(1). Unit should be placed so that air ow throughout the room is not obstructed.

(2). Unit should be installed with sufcient clearances. See illustration above.

(3). Select a location that can bear 4 times the weight of the indoor unit. Unit should be able to

be mounted securely to avoid vibration noise.

(4). The unit should be level when mounted.

(5). Select location where connections to outdoor unit and condensate drain are convenient.

(6). Be sure to leave sufcient space around unit for service and maintenance. Unit should be

mounted 1.8M (6 ft) above the oor.

(7). When installing the expansion bolt, check if the location can withstand the 4 times the

weight of the unit. If not, reinforce before installation (Refer to the cardboard mounting

template included with this unit).

Note!

Dust in the air and oils from cooking can clog the heat exchanger. This will reduce the operating

capacity of the system and could lead to early equipment failure. Please observe the following:

1. Be sure to have an adequately sized vent hood when cooking to remove oils from the air.

2. Do not install air conditioner too close to kitchen or cooking area.

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)

950mm (37-3/8 in) Decorated surface boards

890mm (35-1/16 in) Ceiling opening

840mm (33-1/16 in) Indoor unit

680mm (26-3/4 in) Hoisting screws

950mm (37-3/8 in) Decorated surface boards

890*mm (35-1/16 in) Ceiling opening

840mm (33-1/16 in) Indoor unit

780mm (30-11/16 in) Hoisting screws

Fig. 2 Install Dimension of Model GKH24(7.0)FMK4DH

◆ The drilling of holes in the ceiling must be done by professional personnel.

Ceiling

Installation stands for main body of the unit

160mm

(6-5/16 in)

>20mm

(7/8 in)

Fig.3

Notes: The dimension for the ceiling openings with * marks can be as large as 910mm (35-

13/16 in). But the overlapping sections of the ceiling and the decorated surface boards should be

maintained at no less than 20mm (7/8 in).

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.

(2). Use cardboard installation template

◆ Please refer to the installation cardboard about the dimension of ceiling opening.

◆ The central mark of the ceiling opening is indicated on the cardboard template.

◆ Install the cardboard template on the unit with bolt (3 piece), and fix the angle of the

drainage pipe at the outlet vent with bolt.

(3). Place unit in installation location. (Refer to the Fig. 4)

(4). Check if the unit is level.

◆ Inner drainage pump and bobber switch are included in the indoor unit. Check if unit is level.

(If the unit is slanted away from the condensate drain, there may be a malfunction of the bobber

switch and water leakage.)

(5). Back-out the gasket anchor board used to prevent gasket from breaking off and tighten the

nut on it.

(6). Back-out the cardboard template.

Nut(supplied at scene)

Gasket(attachment)

Gasket anchor board(attachment)

Bolt of one of the angle of outlet pipe is

fix on the angle of the drainage solt

Bolt(attachment)

Water lever

Polyethylene pipe

Center of the ceiling

opening

Insert

Install cardboard

Hoisting stand

Tighten(double nuts)

[Fix the hoisting stand firmly] [Fix the gasket firmly]

[Fix the install cardboard]

Fig. 4

Note!

● Please tighten the nuts and bolts.

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 are nut. Begin turning are nut by

hand, then tighten with a wrench.

◆ Refer to Table 1 to check for required torque (Note: over-tightening can cause damage to the

nut or pipe and cause refrigerant leakage).

◆ Examine the connection pipe for leaks. Apply heat insulation, as shown in the Fig. 5.

◆Wrap tubes and heat preservation sheath with PTFE tape as shown

Smear freeze motoroil

here

Spanner

Thread fasten(X4)

Median sponge (attachment)

(entwine the wiring interface

with seal mat)

Gas collection tube

Liquid inlet tube

Heat preservation

sheath of liquid inlet

tube (attachment) (for

liquid tube)

Heat preservation

sheath of gas collection

tube (attachment)(for

gas tube)

Flare nut

Wiring interface

Torque wrench

Fig. 5

Table 1: The moment of torque for tightening nut

Diameter（Inch）Surface thickness（mm）Moment of torque (N·m)

φ1/4’’≥0.5 15-30 (N·m)

φ3/8’’ ≥0.71 30-40 (N·m)

φ1/2’’ ≥145-50 (N··m)

φ5/8’’ ≥160-65 (N·m)

φ3/4’’ ≥170-75 (N··m)

If the diameter of the outdoor unit pipe joint does not match the indoor unit, the joint

specication of the outlet pipe of the indoor unit takes precedence. A reducing nipple should be

installed at the joint of the outdoor unit to make the joint of the outdoor unit compatible with the

indoor unit.

2.7 Drain Hose

(1). Install the drain hose

◆ The diameter of the drain hose should be larger than or equal to the connection pipe

diameter. (The diameter of polythene pipe: Outer diameter 25mm (1 in) Surface thickness

≥1.5mm)

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 sufcient slope, a drain raising pipe should be added.

◆To prevent drooping of the drain hose, the distance between hoisting stand should be 1 to

1.5m (3 to 5 ft).

1-1.5M

(3-5 ft)

Fig. 6

◆Use the drain hose and clamp included. Insert the drain hose to the drain vent, and then

tighten the clamp.

◆ Wrap the big sponge on the clamp of drain hose to insulate heat.

◆Heat insulation should be applied to indoor drain hose.

Sponge(attachment)

Clamp(attachment)

Clamp

Drain hose

Sponge (gray)

<4mm

(1/8 in)

Fig. 7

Drain Setup Pipe Note

◆The installation height of the drain raising pipe should less than 280mm (11 in).

◆The drain raising pipe should form a right angle with the unit, and distance to unit should not

beyond 300mm (12 in).

<300mm (12 in) 1-1.5M

(3-5 ft) <280mm (11 in)

220mm (8-11/16 in)

<500mm

(20 in)

Fig. 8

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.

<500mm

(20 in)

<75mm (3 in)

Fig. 9

◆ If drain hoses from several units are being installed together, please install according to the

following diagram.

>100mm (4 in)

Fig. 10

(2). Check the smoothness of drain after installation.

◆ Check the drain by adding 600ml (20 oz) water slowly into the outlet vent or test hole.

◆ Check the drain in cooling mode after providing power to the unit.

>100mm (4 in)

Fig. 11

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