Friedrich M18CFKIT Installation Manual download pdf

SPLIT TYPE ROOM AIR CONDITIONER

INSTALLATION MANUAL

(P/N 9315140104-01) ENGLISH

(MODEL: MW18Y3F/MR18Y3F, MW18C3F/MR18C3F)

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:

This symbol refers to a hazard or unsafe practice which

can result in severe personal injury or death.

CAUTION:

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 mainte-

nance 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 con-

nection points and a possible fire hazard.

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:

(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.

This air conditioner uses new refrigerant HFC (R410A).

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 abnor-

mal 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 nar-

row 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.

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 (-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.

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/10m. Do not

use copper pipes having a collapsed, deformed or discolored

portion (especially on the interior surface). Otherwise, the ex-

pansion value or capillary tube may become blocked with con-

taminants.

As an air conditioner using R410A incurs pressure higher than

when using R22, it is necessary to choose adequate materials.

Thicknesses of copper pipes used with R410A are as shown in Table1.Never use copper pipes thinner than 0.8mm even

when it is available on the market.

Table 1 Thicknesses of Annealed Copper Pipes

Thickness (mm)

Nominal

diameter

1/4

1/2

Outer diameter

(mm)

6.35

12.7

R410A

0.80

[ref.] R22

0.80

(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.

WARNING

CAUTION

When installing pipes shorter than 3m, sound of the outdoor unit will be transferred to the indoor unit, which will

cause large operating sound or some abnormal sound.

1 2 3 4 5 6 7

Summary of Contents

Page 1 - INSTALLATION MANUAL

SPLIT TYPE ROOM AIR CONDITIONERINSTALLATION MANUAL(P/N 9315140104-01) ENGLISH(MODEL: MW18Y3F/MR18Y

Page 2 - INDOOR UNIT

(1) Cut a 3-2/16’’(80 mm) diameter hole in the wall at the position shownin (Fig.1).(2) When cutting the wall hole at the inside of the wall hook brac

Page 3 - ELECTRICAL REQUIREMENT

SELECTING THE MOUNTINGPOSITIONINSTALLATION DIAGRAM OFINDOOR AND OUTDOOR UNITSDecide the mounting position with the customer as follows:1. INDOOR UNIT(

Page 4 - OUTDOOR UNIT

123412345GG1. Check if the piping connections are secure.2. Check that the stems of 2-way valve and 3-way valve are closedfully.3. Connect the gauge m

Page 5 - FINISHING

WaveFINISHING(1) Insulate between pipes.● For rear, right, and bottom piping, overlap the connection pipeheat insulation and indoor unit pipe heat ins

Page 6 - TEST RUNNING

CUSTOMER GUIDANCE WARNING(1) The rated voltage of this product is 208/230 V AC60 Hz.(2) Before turning on the power, check if the voltageis within the

Page 7 - CAUTION

REMOTE CONTROL UNIT INSTALLATION CAUTION(1) Check that the indoor unit correctly receives thesignal from the remote control unit, then installthe remo