Friedrich M24YF Installation Manual

SPLIT TYPE ROOM AIR CONDITIONER

This air conditioner uses new refrigerant HFC (R410A).

5 cm or over

The basic installation work procedures are the same as conventional refrigerant (R22) models.

However, pay careful attention to the following points:

INSTALLATION MANUAL

(PART NO. 9315342119) ENGLISH

IMPORTANT! Please Read Before Starting

This air conditioning system meets strict safety and operating standards. As the installer or service person, it is an important part of your job to install or service the system so it operates safely and efficiently.

For safe installation and trouble-free operation, you must:

• Carefully read this instruction booklet before beginning.

• Follow each installation or repair step exactly as shown.

• Observe all local, state, and national electrical codes.

• Pay close attention to all danger, warning, and caution notices given in

this manual.

WARNING:

CAUTION:

• Hazel alerting symbols

This symbol refers to a hazard or unsafe practice which can result in severe personal injury or death.

This symbol refers to a hazard or unsafe practice which can result in personal injury and the potential for product or property damage.

Electrical

• Connect all wiring tightly. Loose wiring may cause overheating at connection points and a possible fire hazard.

When Transporting

Be careful when picking up and moving the indoor and outdoor units. Get a partner to help, and bend your knees when lifting to reduce strain on your back. Sharp edges or thin aluminum fins on the air conditioner can cut your fingers.

When Installing...

...In a Ceiling or Wall

Make sure the ceiling/wall is strong enough to hold the unit’s weight. It may be necessary to construct a strong wood or metal frame to provide added support.

...In a Room

Properly insulate any tubing run inside a room to prevent “sweating” that can cause dripping and water damage to walls and floors.

...In Moist or Uneven Locations

Use a raised concrete pad or concrete blocks to provide a solid, level foundation for the outdoor unit. This prevents water damage and abnormal vibration.

...In an Area with High Winds

Securely anchor the outdoor unit down with bolts and a metal frame. Provide a suitable air baffle.

(1) Since the working pressure is 1.6 times higher than that of conventional refrigerant(R22) mod-

els, some of the piping and installation and service tools are special.(See the table below.)

Especially, when replacing a conventional refrigerant(R22) model with a new refrigerant R410A model, always replace the conventional piping and flare nuts with the R410A piping and flare nuts.

(2) Models that use refrigerant R410A have a different charging port thread diameter to prevent

erroneous charging with conventional refrigerant(R22) and for safety. Therefore, check beforehand.[The charging port thread diameter for R410A is 1/2 threads per inch.]

(3) Be more careful that foreign matter (oil, water, etc.) does not enter the piping than with

refrigerant(R22) models. Also, when storing the piping ,securely seal the opening by pinching, taping, etc.

(4) When charging the refrigerant, take into account the slight change in the composition of the

gas and liquid phases, and always charge from the liquid phase side whose composition is stable.

Special tools for R410A

Tool name

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

Pressure is high and cannot be measured with a conventional gauge. To prevent erroneous mixing of other refrigerants, the diameter of each port has been changed.

It is recommended the gauge with seals-0.1 to 5.3 MPa (-1 to 53 bar) for high pressure.

-0.1 to 3.8 MPa (-1 to 38 bar) for low pressure.

To increase pressure resistance, the hose material and base size were changed.

A conventional vacuum pump can be used by installing a vacuum pump adapter.

Special gas leakage detector for HFC refrigerant R410A.

Contents of change

Safety / alert

If Necessary, Get Help

These instructions are all you need for most installation sites and maintenance conditions. If you require help for a special problem, contact our sales/service outlet or your certified dealer for additional instructions.

In Case of Improper Installation

The manufacturer shall in no way be responsible for improper installation or maintenance service, including failure to follow the instructions in this document.

SPECIAL PRECAUTIONS

When Wiring

ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH. ONLY A QUALIFIED, EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM.

• Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked.

• Highly dangerous electrical voltages are used in this system. Carefully refer to the wiring diagram and these instructions when wiring. Improper connections and inadequate grounding can cause accidental injury or death.

• Ground the unit following local electrical codes.

...In a Snowy Area (for Heat Pump-type Systems)

Install the outdoor unit on a raised platform that is higher than drifting snow. Provide snow vents.

When Connecting Refrigerant Tubing

• Keep all tubing runs as short as possible.

• Use the flare method for connecting tubing.

• Apply refrigerant lubricant to the matching surfaces of the flare and

union tubes before connecting them, then tighten the nut with a torque wrench for a leak-free connection.

• Check carefully for leaks before starting the test run.

NOTE:

Depending on the system type, liquid and gas lines may be either narrow or wide. Therefore, to avoid confusion the refrigerant tubing for your particular model is specified as either “small” or “large” rather than as “liquid” or “gas”.

When Servicing

• Turn the power OFF at the main circuit breaker panel before opening the unit to check or repair electrical parts and wiring.

• Keep your fingers and clothing away from any moving parts.

• Clean up the site after you finish, remembering to check that no metal

scraps or bits of wiring have been left inside the unit being serviced.

• After installation, explain correct operation to the customer, using the operating manual.

Copper pipes

It is necessary to use seamless copper pipes and it is desirable that the amount of residual oil is less than 40 mg/10m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface). Otherwise, the expansion value or capillary tube may become blocked with contaminants. As an air conditioner using R410A incurs pressure higher than

CONNECTION PIPE REQUIREMENT

Nominal diameter

1/4in

5/8in

Outer

diameter

6.35mm

15.88mm

Thickness

0.8mm

1.0mm

Maximum

length

30m(99ft)

Maximum height

(between indoor and

outdoor)

20m(66ft)

when using R22, it is necessary to choose adequate materials. Thicknesses of copper pipes used with R410A are as shown in the table. Never use copper pipes thinner than that in the table even when it is available on the market.

WARNING

(1) Do not use the existing (for R22) piping and flare nuts.

• If the existing materials are used, the pressure inside the refrigerant cycle will rise and cause breakage, injury, etc.(Use the special R410A materials.)

(2) When installing and relocating the air conditioner, do not mix gases other than the specified refrigerant(R410A) to

enter the refrigerant cycle.

• If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high value and cause breakage, injury, etc.

CAUTION

When installing pipes shorter than 10 ft (3m), sound of the outdoor unit will be transferred to the indoor unit, which will cause large operating sound or some abnormal sound.

OUTDOOR UNIT

208/230V

(L)

(N)

OUTDOOR UNIT INSTALLATION

● Set the unit on a strong stand, such as one made of concrete blocks to

minimize shock and vibration.

● Do not set the unit directly on the ground because it will cause trouble.

Connector cover removal

● Remove the tapping screws.

Installing the connector cover

(1) After inserting the two front hooks, then insert the rear hook. (2) Tighten the tapping screws.

WARNING

(1) Install the unit where it will not be tilted by more

than 5°.

(2) When installing the outdoor unit where it may

exposed to strong wind, fasten it securely.

AIR PURGE

Always use a vacuum pump to purge the air. Refrigerant for purging the air is not charged in the outdoor unit at the factory.

Close the high pressure side valve of the gauge manifold fully and do not operate it during the following work.

Tapping screw

Front hooks

Rear hooks

Connector cover

CAUTION

(1) Refrigerant must not be discharged into atmos-

phere.

(2) After connecting the piping , check the joints for

gas leakage with gas leak detector.

ELECTRICAL WIRING (OUTDOOR UNIT)

1. Remove the screws, then remove the control box cover.

2. Fasten the Inter unit wire harness and power supply to the conduit holder using the lock nut.

3. Connect inter-unit wire harness and power supply to the terminal. Refer to the wiring diagram

4. Use the screws to install the control box cover.

WARNING

Be sure to comply with local codes while running the wire from the indoor unit to the outdoor unit (size of wire and wiring method, etc. ).

Every wire must be connected firmly.

No wire should be allowed to touch refrigerant tubing, the compressor or any moving part.

Loose wiring may cause the terminal to overheat or result in unit malfunction. A fire hazard may also exist. Therefore, be sure all wiring is tightly connected.

Connect wires to the matching numbers of terminals.

NOTE:

• Connector trade size for this unit is 1/2” (12.7 mm). The connector

can be bought at a hardware store. Refer to “How to connect wir- ing to the terminals” for instructions on connecting depending on the wire type you are using.

• The fuse located in the outdoor unit provides power supply protection and may blow when power is applied if the system has been incorrectly wired.

Lock nut

1. Check if the piping connections are secure.

2. Check that the stems of 2-way valve and 3-way valve are closed fully.

3. Connect the gauge manifold charge hose to the charging port of the 3-way valve (side with the projection for pushing in the valve core).

4. Open the low pressure side valve of the gauge manifold fully.

5. Operate the vacuum pump and start pump down.

6. Slowly loosen the flare nut of the 3-way valve and check if air enters, then retighten the flare nut. (When the flare nut is loosened the operating sound of the vacuum pump changes and the reading of the compound pressure gauge goes from minus to zero.)

7. Pump down the system for at least 15 minutes, then check if the compound pressure gauge reads -0.1 MPa (-76 cmHg, -1 bar).

10. Fully open the valve stems of the 2-way valve and 3-way valve using a hexagon wrench. (After the valve stem begins to turn, turn it with a torque of less than 2.14 ft•lbs (30 kgf•cm) until it stops turning.)

11. Firmly tighten the 2-way valve and 3-way valve blank cap and the charging port cap.

Gauge manifold

-0.1 MPa (-76 cmHg

-1 bar)

Low pressure side valve

Charge hose

Pressure gauge

High pressure side valve (closed)

Charge hose

Vacuum pump

3-way valve

Charging port cap

Compound pressure gauge

2-way valve

Flare nut

Valve stem

Blank cap

Charging port

Indoor unit

Terminal

DISCONNECT SWITCH (FIELD SUPPLY)

Indoor unit terminal block

Grounding line

Control line

208/230V

(Inter Unit) Power line

Outdoor unit

Terminal

(N)

(L)

POWER SUPPLY

1 phase, 208/230V

Outdoor unit terminal block

Cord Clamp

Conduit connector

Power supply Inter-unit wire harness

8. At the end of pump down, close the low pressure side gauge of the gauge manifold fully and stop the vacuum pump.

9. Slowly loosen the valve stem of the 3-way valve. When the compound pressure gauge reading reaches 0.1-0.2 MPa, retighten the valve stem and disconnect the charge hose from the 3-way valve charging port. (If the stem of the 3-way valve is opened fully before the charge hose is disconnected, it may be difficult to disconnect the charge hose.)

Tightening torque

Blank cap (2-way valve) 14.75 to 18.44 ft•lbs (200 to 250 kgf•cm)

Blank cap (3-way valve) 22.12 to 25.81 ft•lbs (300 to 350 kgf•cm)

Charging port cap 7.37 to 8.85 ft•lbs (100 to 120 kgf•cm)

Earth screw

Disconnect switch

Power supply line

Earth screw

GENERAL

This INSTALLATION MANUAL briefly outlines where and how to install the air conditioning system. Please read over the entire set of instructions for the indoor and outdoor units and make sure all accessory parts listed are with the system before beginning.

TYPE OF COPPER PIPE AND INSULATION MATERIAL

Copper tubing for connectin the outdoor unit to the indoor unit and insulation material is available for purchase locally. When you purchase them, please specify the following.

Deoxidized annealed copper pipe for refrigerant piping as:

Small pipe Large pipe

Outer diameter Thickness Outer diameter Thickness

1/4”(6.35 mm)

0.031496 in (0.8 mm) (1.0 mm)

5/8”(15.88 mm)

Cut each pipe to the appropriate length +12” (30 cm) to16” (40 cm) to dampen vibration between units.

B. Foamed polyethylene insulation for copper pipes as

required to precise length of piping. Wall thickness of the insulation should not be less than 5/16” (8 mm).

C. Use insulated copper wire for field wiring.

CAUTION

Check local electrical codes and regulations before obtaining wire. Also, check any specified instructions or limitations.

2. ADDITIONAL MATERIALS REQUIRED FOR INSTALLATION

A. Refrigeration (armored) tape B. Insulated staples or clamps for connecting wire

(See your local electrical codes.) C. Putty D. Refrigeration lubricant E. Clamps or saddles to secure refrigerant piping

3. OPERATING RANGE

Cooling/Dry Mode

Outdoor temperature

Indoor temperature

Indoor humidity

About 14 to 115 °F

About 64 to 90 °F

About 80% or less

ADDITIONAL CHARGE

Refrigerant suitable for a piping length of 49 ft (15 m) is charged in the outdoor unit at the factory. When the piping is longer than 49 ft (15 m), additional charging is necessary. For the additional amount, see the table below.

Pipe length

Additional

refrigerant

Between 49 ft (15 m) and 99 ft (30 m), when using a connection pipe other than that in the table, charge additional refrigerant with 0.21 oz/ ft (20g/1 m) as the criteria.

66 ft (20 m)

3.5 oz (100 g)

83 ft (25 m)

9.0 oz (200 g)

CAUTION

(1) When adding refrigerant, add the refrigerant from

the charging port at the completion of work.

(2) The maximum length of the piping is 99 ft (30

m). If the units are further apart than this, correct operation can not be guaranteed.

0.03937 in

Heating Mode

About 5 to 75 °F

88 °F or less

99 ft (30 m)

10.5 oz (300 g)

STANDARD ACCESSORIES

The following installation accessories are supplied. Use them as required.

Name and Shape Q’ty Name and Shape Q’ty

Wall hook bracket

Remote control unit

Cloth tape

Tapping screw (big)

Tapping screw (small)

Battery

Insulation (Drain hose)

Remote control unit holder

Drain pipe

(Reverse cycle model only)

The following items are necessary to install this air conditioner. (The items are not included with the air conditioner and must be purchased separately.)

Name

Connection pipe assembly

Connection cord

Wall pipe

Decorative tape

Vinyl tape

Wall cap

Saddle

Drain hose

Tapping screws

Sealant

Q’ty

1 set

ELECTRICAL REQUIREMENT

Always make the air conditioner power supply a special branch circuit and provide a special switch and receptacle. Do not extend the power cord.

CAUTION

MINIMUM CIRCUIT AMPACITY 21 A

MAXIMUM OVERCURRENT PROTECTION (TIME DELAY FUSE OR HACR TYPE CIRCUIT BREAKER)

25 A

SELECTING THE MOUNTING POSITION

Decide the mounting position with the customer as follows:

1. INDOOR UNIT

(1) Install the indoor unit level on a strong wall which is not subject

to vibration.

(2) The inlet and outlet ports should not be obstructed : the air should

be able to blow all over the room. (3) Install the unit near an electric outlet or special branch circuit. (4) Do not install the unit where it will be exposed to direct sunlight. (5) Install the unit where connection to the outdoor unit is easy. (6) Install the unit where the drain pipe can be easily installed. (7) Take servicing, etc. into consideration and leave the spaces shown

in the figure. Also install the unit where the filter can be removed.

2. OUTDOOR UNIT

(1) If possible, do not install the unit where it will be exposed to di-

rect sunlight. (If necessary, install a blind that does not interfere

with the air flow.) (2) Do not install the unit where a strong wind blows or where it is

very dusty. (3) Do not install the unit where people pass. (4) Take your neighbors into consideration so that they are not dis-

turbed by air blowing into their windows or by noise. (5)

Provide the space shown in the figure so that the air flow is not blocked.

Also for efficient operation, leave open three of the four direc-

tions front, rear, and both sides.

WARNING

Install at a place that can withstand the weight of the indoor and outdoor units and install positively so that the units will not topple or fall.

CAUTION

(1) Do not install where there is the danger of com-

bustible gas leakage. (2) Do not install near heat sources. (3) If children under 10 years old may approach the

unit, take preventive measures so that they can-

not reach the unit.

(4) Install the indoor unit on the wall where the height

from the floors more than 240 cm.

[Indoor unit piping direction]

The piping can be connected in the 7 directions in the figure. When the piping is connected in direction 2, 3, 4 or 5, cut along the

piping groove in the side of the front panel with a hacksaw.

(Rear)

5 Left

outlet

2 Right

outlet

3 Bottom outlet

1 Rear

outlet

6 Center outlet

4 Left bottom

7 Left rear

outlet

INSTALLATION DIAGRAM OF INDOOR AND OUTDOOR UNITS

[INDOOR UNIT]

2-1/2”(6 cm)

2”(5 cm) or over

60”(150 cm) or over

or over

95”(240 cm) or over

Remote

control unit

[OUTDOOR UNIT]

24”(60 cm) or over

4”(10 cm) or over

12”(30 cm) or over

• Do not directly install it on the ground, otherwise it will cause failure.

• To obtain better operation

21-1/4”(54 cm)

efficiency, when the outdoor unit is installed, be sure to open the front and left side.

2”(5 cm) or over

(32 cm)

12-9/16”

CAUTION

(1) When the outdoor temperature is 32 °F or less, do not use the accessory

drain pipe and drain cap. If the drain pipe and drain cap are used, the drain water in the pipe may freeze in extremety cold weather.(Reverse cycle model only)

(2) In the area with heavy snowfall, if the intake and outlet of outdoor unit

is blocked with snow, it is likely to cause of the breakdown. Please construct a canopy and a pedestal or place the unit on a high stand (local configured).

Wall hook bracket

2”(5 cm) or over

(Wall cap)

Remote

control unit

holder

Tapping

screw(small)

4”(10 cm) or over

12” (30 cm) or over

Outdoor unit bottom

Drain hose

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