Friedrich MR24DYF, M36QYF Installation Manual

SPLIT TYPE ROOM AIR CONDITIONER

INSTALLATION INSTRUCTION SHEET

(PART NO. 9374747030)

For authorized service personnel only.

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

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.

DANGER

Never touch electrical components immediately after the power supply has been turned off. Electrical shock may occur. After turning off the power, always wait 5 minutes or more before touching electrical components.

WARNING

1 For the room air conditioner to operate satisfactorily, install it as outlined in this installation instruction sheet.

2 Connect the indoor unit and outdoor unit with the room air conditioner piping and cords available standards parts. This

installation instruction sheet describes the correct connections using the installation set available from our standard parts.

3 Installation work must be performed in accordance with national wiring standards by authorized personnel only.

4 Also, do not use an extension cord.

5 Do not turn on the power until all installation work is complete.

6 Do not purge the air with refrigerants but use a vacuum pump to vacuum the installation.

7 There is not extra refrigerant in the outdoor unit for air purging.

8 Use a vacuum pump for R410A exclusively.

9 Using the same vacuum pump for different refrigerants may damage the vacuum pump or the unit.

0 Use a clean gauge manifold and charging hose for R410A exclusively.

A If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with a flame,

it produces a toxic gas.

••

• Be careful not to scratch the room air conditioner when handling it.

••

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

••

• Let the customer keep this installation instruction sheet because it is used when the room air conditioner is serviced or moved.

Use

For outdoor unit drain piping work

Q’ty

Name and Shape

Drain pipe

Drain cap

STANDARD PARTS

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

Use

For use when connecting models 9–12 to outdoor port A

Q’ty

Name and Shape

Adapter assy

12.7 mm / 9.52 mm (1/2 in.) (3/8 in.)

36 type only

OPERATING RANGE

Temperature Indoor air intake Outdoor air intake

Cooling

Maximum 90 °F DB 115 °F DB

Minimum 65 °F DB 32 °F DB

Heating

Maximum 86 °F DB or less 75 °F DB

Minimum — 14 °F DB

Indoor humidity about 80% or less

Special tools for R410A

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

installation 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 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 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.

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.

Pipe outside diameter

6.35 mm (1/4 in.)

9.52 mm (3/8 in.)

12.70 mm (1/2 in.)

15.88 mm (5/8 in.)

19.05 mm (3/4 in.)

Thickness

0.80 mm (1/32 in.)

1.00 mm (5/128 in.)

1.20 mm (3/64 in.)

Thicknesses of Annealed Copper Pipes (R410A)

If the space is larger than that is stated, the condition will be the

same as that there are no obstacles.

250 mm (10")

or more

(Service space)

SELECTING THE MOUNTING POSITION

WARNING

Select installation locations that can properly support the weight of the indoor and outdoor units. Install the units securely so that they do not topple or fall.

CAUTION

1 Do not install where there is the danger of combustible gas leakage.

2 Do not install the unit near heat source of heat, steam, or flammable gas.

3 If children under 10 years old may approach the unit, take preventive measures so that they cannot reach the unit.

WARNING

1 Install the unit where it will not be tilted by more than 3˚. However, do not install the unit with it tilted towards the side

containing the compressor.

2 When installing the outdoor unit where it may exposed to strong wind, fasten it securely.

Decide the mounting position with the customer as follows: (1) Install the outdoor unit in a location which can withstand the weight of the unit and vibration, and which can install horizontally. (2) Provide the indicated space to ensure good airflow. (3) If possible, do not install the unit where it will be exposed to direct sunlight.

(If necessary, install a blind that does not interfere with the airflow.) (4) Do not install the unit near a source of heat, steam, or flammable gas. (5) During heating operation, drain water flows from the outdoor unit.

Therefore, install the outdoor unit in a place where the drain water flow will not be obstructed. (Reverse cycle model only) (6) Do not install the unit where strong wind blows or where it is very dusty. (7) Do not install the unit where people pass. (8) Install the outdoor unit in a place where it will be free from being dirty or getting wet by rain as much as possible. (9) Install the unit where connection to the indoor unit is easy.

••

• When there are obstacles at the back side.

••

• When there are obstacles at the back and front sides.

••

• When there are obstacles at the back side with the installation of

more than one unit.

AIR

100 mm (4")

or more

250 mm (10")

or more

250 mm (10")

or more

100-300 mm*

(4"-12")

300 mm (12")

or more

600-1000 mm*

(24"-40")

••

• When there are obstacles at the back, side(s), and top.

600 mm (24")

or more

100 mm (4")

or more

300 mm (12")

or more

SYSTEM LAYOUT

Layout example for the indoor units and outdoor unit

UNIT D 9-12

UNIT C 9-12

UNIT B 9-12

UNIT A 9-18

Circuit breaker

OUTDOOR UNIT

Power source 208/230 V ~ 60 Hz

Power cord

Connection cord

Refrigerant pipe

36 type

INDOOR UNITS

Connectable model name

9 – 12

/18

D 6.35/9.52

C 6.35/9.52

B 6.35/9.52

A 6.35/12.7

1. CONNECTABLE INDOOR UNIT CAPACITY TYPE

CAUTION

• The total capacity of the indoor units connected must be between 27,000 and 36,000 BTU. (Refer to the Table.) Ex. Maximum connection of four indoor units: 9,000+9,000+9,000+9,000=36,000

• If the total capacity of the connected indoor units exceeds 36,000 BTU, an error will be displayed and the units will not operate. (For information on error displays, refer to the installation instruction sheets included with the indoor units.)

• To install an indoor unit, refer to the installation instruction sheet included with the indoor unit.

• At least three indoor units must be connected to the outdoor unit.

*1 When connecting models 9–12 to the outdoor unit, the included adapter is necessary. (For

more information, refer to “2-4 HOW TO USE ADAPTER”.)

Outdoor port

Standard port size

UNIT D ø6.35, ø9.52 UNIT C ø6.35, ø9.52 UNIT B ø6.35, ø9.52 UNIT A ø6.35, ø12.7

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