Friedrich C24YF Installation Manual

Refrigerant

R410A Cassette Type

STANDARD PARTS

The following installation parts are furnished. Use them as required.

INDOOR UNIT ACCESSORIES

Name and Shape

Coupler heat insulation

Special nut A (large flange)

Special nut B (small flange)

Template

Blower cover insulation

Hook wire

Binder (small)

Remote controller

Tapping screw (flush heads)

Remote controller cord

Q’ty

Application

For indoor side pipe joint

For installing indoor unit

For ceiling hole cutting

For discharged air

For installing intake grille.

For fixing the remote controller cord

For installing the remote controller

For connecting the remote controller

INSTALLATION PROCEDURE

Install the air conditioner as follows:

INDOOR UNIT INSTALLATION

WARNING

● Install the air conditioner in a location which can withstand a load do at least five times the weight of the main unit and which will not amplify sound or vibration. If the installation location is not strong enough, the indoor unit may fall and cause injuries.

● If the job is done with the panel frame only, there is a risk that the unit will come loose. Please take care.

REMOVING THE INTAKE GRILLE

(1) Push the intake grille pushbuttons (two places). (2) Open the intake grille.

OPEN

PUSH

(3) Remove the grille hinge wire.

SPLIT TYPE AIR CONDITIONER

INSTALLATION INSTRUCTION SHEET

(PART NO. 9370937022)

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.

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.

•

Hazel alerting symbols

Electrical

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.

•

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

WARNING:

CAUTION:

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.

...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.

• Pull up while pressing the B section.

Part A detail view Part A section view

(4) Remove the intake grille.

REMOVING THE PANEL FRAME

• Pull up the corner sections (A) of the panel frame as shown in figure (4 locations).

Part A detail view

Grille hinge wire

• Pull up in the direction of the arrow while holding down the C section of figure (4 locations).

Part B detail view

Panel base

Panel frame

CAUTION

Always remove the panel frame after removing the intake grille.

1. POSITION THE CEILING HOLE AND HANGING BOLTS

940 mm ( 37")

890 mm ( 35-3/64")

750 mm (29-17/32")

Hanging bolt M10

(A) Standard setting

Hole-in anchor Hole-in plug

Concrete Insert

Drain pipe (I.D. 32 mm)

60 mm

(2-3/8")

305.5 mm (12")

298.5 mm (11-3/4")

(2-3/4")

248.5 mm (9-25/32")

70 mm

(3-15/16")

(5")

100 mm

127 mm

235 mm (9-1/4") [18 to 24 type]

285 mm (11-7/32") [30 to 54 type]

(B) Slender setting

Drain pipe (I.D. 32 mm)

60 mm

(2-3/8")

305.5 mm (12")

298.5 mm (11-3/4")

248.5 mm (9-25/32")

70 mm

(2-3/4")

(3-15/16")

(3-5/8")

100 mm

92 mm

200 mm (7-7/8") [18 to 24 type]

250 mm (9-27/32") [30 to 54 type]

3. BODY INSTALLATION

As for the dimension of the ceiling rear hight is above figure or more. (1) Install special nut A, then special nut B onto the hanging bolt.

(2) Raise the body and mount its hooks onto the hanging bolt between

the special nuts. (3) Turn special nut B to adjust the height of the body. (4) Leveling

Using a level, or vinyl hose filled with water, fine adjust so that the

body is level.

WARNING

Perform final tightening by tightening the double nut firmly.

* Must fit tightly against ceiling

without any gap.

Special nut B

Hanging bolt

Special nut A

30 mm (1-3/16") or more

Hook

Ceiling

After installing the body, tighten the nuts.

* Allowable space between the unit and the ceiling 5 mm (3/16") or less

INSTALLING THE PANEL FRAME

Vinyl hose

* With slender setting, turn the panel frame 90° as shown in the dia-

gram above.

Grille setting method has been changed at the marked positions on the panel frame and panel base.

(A) Standard setting (B) Slender setting

(Example)

Panel base

Panel frame

*90° Turn

Mark

Panel frame

No mark

2. HANGING PREPARATIONS

• Firmly fasten the hanging bolts as shown in figure or by another method.

• Install the hanging bolts at a place where they would be capable of

holding a weight of at least 50 kgf per bolt.

(Hanging bolt position)

(Grille measurement)

(Hanging bolt position)

(Ceiling opening measurement)

* Appearance of slender setting

Pipe

Especially, the installation place is very important for the split type air conditioner because it is very difficult to move from place to place after the first installation. Decide the mounting position together with the customer as follows: The discharge direction can be selected as shown below.

CAUTION

Since 2-way outlet as shown below causes performance problems, do not set it.

(4 directions)

(3 directions)

100 mm (4") or more

Piping position

directions

)

100 mm (4") or more

directions

)

100 mm (4") or more

INDOOR UNIT

(1) Install the indoor unit on a place having a sufficient strength so that it

withstands against the weight of the indoor unit.

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

able to blow all over the room. (3) Leave the space required to service the air conditioner. (4) The ceiling rear height as shown in figure. (5) A place from where the air can be distributed evenly throughout the

room by the unit. (6) A place from where drainage can be extracted outdoors easily. (7) Install the unit where noise and vibrations are not amplified.

Obstruction

Strong and durable ceiling

2,400 mm (94")

or more

1,000 mm (39") or more

1,000 mm (39")

or more

Floor

SELECTING THE MOUNTING POSITION

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 combustible

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 cannot reach the unit.

(B) Slender setting(A) Standard setting

215 mm (8-15/32")

or more

250 mm (9-27/32")

or more

This mechanism enables the cassette body to move 35 mm (1-3/8") downward and realizes installation to the space of 215 or 265 mm (8-15/32" or 10-15/32"). No special works and option is needed.

You can select 2-way setting

[18 to 24 type]

(B) Slender setting(A) Standard setting

265 mm (10-15/32")

or more

300 mm (11-13/16")

or more

[30 to 54 type]

CONNECTION PIPE REQUIREMENT

CAUTION

Install heat insulation around both the gas and liquid pipes. Failure to do so may cause water leaks. Use heat insulation with heat resistance above 248 °F. (Reverse cycle model only) In addition, if the humidity level at the installation location of the refrigerant piping is expected to exceed 70%, install heat insulation around the refrigerant piping. If the expected humidity level is 70-80%, use heat insulation that is 15 mm (19/32") or thicker and if the expected humidity exceeds 80%, use heat insulation that is 20 mm (3/4") or thicker. If heat insulation is used that is not as thick as specified, condensation may form on the surface of the insulation. In addition, use heat insulation with heat conductivity of

0.045 W/(m·K) or less (at 68 °F).

ELECTRICAL REQUIREMENT

••

• Install all electrical works in accordance to the standard.

••

• Install the disconnect device with a contact gap of at least 3 mm (1/8")

in all poles nearby the units. (Both indoor unit and outdoor unit)

••

• Install the circuit breaker nearby the units.

••

• Use pipe with water-resistant heat insulation.

Connection cord (mm2)

MAX.

MIN.

2.5

1.5

••

• Electric wire size:

This air conditioner uses new refrigerant HFC (R410A).

The basic installation work procedures are the same as conventional refrigerant models. However, pay careful attention to the following points:

1 Since the working pressure is 1.6 times higher than that of conventional refrigerant models, some of the piping and instal-

lation and service tools are special. (See the table below.)

Especially, when replacing a conventional refrigerant model with a new refrigerant R410A model, always replace the con-

ventional 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 con-

ventional refrigerant and for safety. Therefore, check beforehand. [The charging port thread diameter for R410A is 1/2 UNF 20 threads per inch.]

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

storing the piping, securely seal the openings 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

Contents of change

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 (–76 cmHg to 53 kgf/cm

) for high pressure.

–0.1 to 3.8 MPa (–76 cmHg to 38 kgf/cm

) 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.

Tool name

Gauge manifold

Charge hose

Vacuum pump

Gas leakage detector

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/10 m. Do not use copper pipes having a collapsed, deformed or discolored portion (especially on the interior surface). Otherwise, the expansion valve or capillary tube may become blocked with contaminants. As an air conditioner using R410A incurs pressure higher than when using conventional refrigerant, 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.

6.35 mm (1/4 in.)

9.52 mm (3/8 in.)

12.70 mm (1/2 in.)

15.88 mm (5/8 in.)

0.80 mm (0.0315 in.)

1.00 mm (0.0394 in.)

Pipe outside diameter

Thickness

Thicknesses of Annealed Copper Pipes (R410A)

CAUTION

This installation instruction sheet describes how to install the indoor unit only. To install the outdoor unit, refer to the installation instruction sheet included with the outdoor unit.

GENERAL

This INSTALLATION INSTRUCTION SHEET 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.

14000, 18000 BTU/h 24000, 36000,

model 42000 BTU/h model

MODEL

Diameter

Liquid Gas

6.35 mm (1/4 in.) 9.52 mm (3/8 in.)

12.70 mm (1/2 in.) 15.88 mm (5/8 in.)

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