Mitsubishi PLFY-NLMD Installation Manual

Air-Conditioners For Building Application INDOOR UNIT

PLFY-NLMD

FOR INSTALLER

据付工事者へ

INSTALLATION MANU AL

For safe and correct use, please read this installation manual thoroughly before installing the air-conditioner unit. How to install an optionally available panel is also described in the panel installation manual. How to install outdoor units and items about the multi-unit system are described in the outdoor unit installation manual. ∗ Remote controller (PAR-F25M or PAR-F26M) is available as an optional remote controller.

ENGLISH

日本語

据付説明書

据付の前に正しく安全にお使いいただくためこの取扱説明書を必ずお読みください。室外側ユニットの据付方法およびマルチシステム関連の項目は、室外側ユニットの据付説明書に記載されております。また、別売部品のパネルの据付はパネルの据付説明書に記載されております。 ∗ リモコン(PAR-F25M又は、PAR-F26M)は別売品です。

Contents

1. Safety precautions ...................................................................... 3

1.1. Before installation and electric work................................3

1.2. Before getting installed.................................................... 3

1.3. Before getting installed (moved) - electrical work .......... 4

1.4. Before starting the test run.............................................. 4

2. Indoor unit accessories ............................................................... 5

3. Selecting an installation site ........................................................ 5

3.1. Securing installation and service space ..........................5

3.2. Split flow duct end connection - fresh air intake ............. 5

3.3. Combining indoor units with outdoor units ..................... 6

4. Fixing hanging bolts .................................................................... 6

4.1. Fixing hanging bolts ........................................................6

4.2. Ceiling hole and hanging bolt positions...........................6

5. Installing the unit ......................................................................... 7

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5.1. Hanging the unit body .....................................................7

5.2. Confirming the unit’s position and fixing hanging bolts .. 8

6. Refrigerant pipe and drain pipe specifications ............................8

6.1. Refrigerant pipe and drain pipe specifications ............... 8

6.2. Refrigerant pipe , drain pipe and filling port ................... 8

6.3. Request for refrigerant piping connection ...................... 9

7. Connecting refrigerant pipes and drain pipes ............................ 10

7.1. Refrigerant piping work .................................................10

7.2. Drain piping work .......................................................... 10

7.3. Confirming drain discharge ........................................... 11

8. Electrical wiring ......................................................................... 11

8.1. Power supply wiring ......................................................12

8.2. Connecting remote controller, indoor and outdoor

transmission cables ...................................................... 12

8.3. Connecting electrical connections................................. 13

8.4. Setting addresses ......................................................... 14

8.5. Sensing room temperature with the built-in sensor in a

remote controller ...........................................................14

9. Test run ..................................................................................... 15

1. Safety precautions

1.1. Before installation and electric work

s Before installing the unit, make sure you read all the

“Safety precautions”.

s The “Safety precautions” provide very important

points regarding safety. Make sure you follow them.

Symbols used in the text

Warning: Describes precautions that should be observed to prevent danger of injury or death to the user.

Caution: Describes precautions that should be observed to prevent damage to the unit.

Symbols used in the illustrations

: Indicates an action that must be avoided.

: Indicates that important instructions must be followed.

: Indicates a part which must be grounded.

: Indicates that caution should be taken with rotating parts. (This

symbol is displayed on the main unit label.) <Color: Yellow>

: Indicates that the main switch must be turned off before servic-

ing. (This symbol is displayed on the main unit label.) <Color:

Blue>

: Beware of electric shock. (This symbol is displayed on the main

unit label.) <Color: Yellow>

Warning:

Carefully read the labels affixed to the main unit.

Warning:

• The unit must be securely installed on a structure that can sus-

tain its weight. If the unit is mounted on an unstable structure, it

may fall down causing injuries.

• Use only specified cables for wiring. The connections must be

made securely without pulling on the terminals. Improper con-

nections or installation may generate heat or cause a fire.

• The unit should be installed according to the instructions in or-

der to minimize the risk of damage from earthquakes, typhoons

or strong winds. An improperly installed unit may fall down and

cause damage or injuries.

• When installing an optional air cleaner or humidifier, be sure to

use only products specified by Mitsubishi.

All accessories must be installed by an authorized technician.

The user must not try to install accessories. Improperly installed

accessories can cause water leakage, electric shock or fire.

• Do not turn on the power until installation has been completed.

Failure to do so may cause an electric shock or fire.

• The unit should not be installed by the user. Ask the dealer or

an authorized technician to install the unit. If the unit is installed

improperly, water leakage, electric shock or fire may result.

• Use only accessories authorized by Mitsubishi Electric and ask

the dealer or an authorized technician to install them. If acces-

sories are installed improperly, water leakage, electric shock or

fire may result.

• The Installation Manual details the suggested installation method. Any structural alteration necessary for installation must comply with local building code requirements.

• The user should never attempt to repair the unit or transfer it to another site. If the unit is repaired improperly, water leakage, electric shock or fire may result. If the air conditioner must be repaired or moved, consult the dealer.

• All electric work must be performed by a licensed technician, according to local regulations and the instructions given in this manual. The units should be powered by dedicated power lines. Power lines with insufficient capacity or improper electrical work may result in electric shock or fire.

• The terminal bed cover of the outdoor unit must be firmly attached to prevent entry of dust and moisture. Improper mounting of the cover can cause electric shock or fire.

• Use only the specified refrigerant (R-22) to charge the refrigerant circuit. Do not mix it with any other refrigerant and do not allow air to remain in the circuit. Air enclosed in the circuit can cause pressure peaks resulting in a rupture and other hazards.

• If the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant concentration in the room from exceeding the safety limit in the event of refrigerant leakage. Consult the dealer regarding the appropriate measures to prevent the allowable concentration from being exceeded. Should the refrigerant leak and cause the concentration limit to be exceeded, hazards due to lack of oxygen in the room could result.

• Ventilate the room if refrigerant leaks during operation. If the refrigerant comes in contact with a flame, poisonous gases will be released.

1.2. Before getting installed

Caution:

• Do not install the equipment where combustible gas may leak and accumulate resulting in fire.

• Do not keep food, plants, caged pets, artwork or precision instruments in the indoor unit’s direct airflow or too close to the unit, as these items can be damaged by temperature changes or dripping water.

• When the room humidity exceeds 80% or when the drain pipe is clogged, water may drip from the indoor unit. Do not install the indoor unit where such dripping could cause damage. The outdoor unit produces condensation during the heating operation. Make sure to provide drainage around the outdoor unit if such condensation is likely to cause damage.

• This air conditioner should not be installed in areas exposed to thick steam, volatile oil (including machine oil) or sulphuric smoke, as this could significantly reduce its performance and damage the internal parts.

• When installing the unit in a hospital, communication station, etc., provide sufficient protection against noise. The air-conditioner may operate erroneously or fail to operate because it is affected by inverter equipment, private power generator, high-frequency medical equipment or radio-used communications equipment. Conversely, it may affect such equipment, creating noise to disturb medical treatment or image broadcasting.

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1.3. Before getting installed (moved) electrical work

Caution:

• When installing the power lines, do not apply tension to the ca-

bles, as this could loosen the connections, generate heat and cause a fire.

• Use only a fuse of specified capacity. A fuse of larger capacity

or a steel or copper wire could cause a general unit failure or fire.

• Make sure to install an earth leakage breaker as this device helps

reduce the risk of electric shocks. Installation of an earth leakage breaker is mandatory in some areas.

• For the power lines, use standard cables of sufficient current

capacity. Otherwise, current leakage, overheating or fire may occur.

• Be very careful about product transportation. Only one person should not carry the product if it is more than 20 kg. Some products use PP bands for packaging. Do not use any PP band for a means of transportation. Do not touch the heat exchanger fins with your bear hands. Doing so may cut your hands. Tear off and discard plastic packaging bags so that children will not play any of them. If children play a plastic bag which was not torn off, it may cause a risk of suffocation .

• The base and attachments of the outdoor unit should be periodically checked for looseness, cracks or other damage. If such defects are left uncorrected, the unit may fall and cause personal injury or property damage.

• Be sure to safely dispose of the packaging materials. Packaging materials, such as catches and other metal or wooden parts, may cause stabs or other injuries.

Earth connection

Caution:

Make sure to install a grounding line. Do not connect the ground-

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ing line to gas or water pipes, lightning conductors or telephone grounding lines. Improper grounding may cause an electric shock.

Drain piping

Caution:

• Install drain piping according to this Installation Manual to ensure proper drainage. Place thermal insulation on the pipes to prevent condensation. Improper drain piping may cause water leakage and damage to furniture or other possessions.

• Thermal insulation of the drain pipes is necessary to prevent dew condensation. If the drain pipes are not properly insulated, condensation will result and drip on the ceiling, floor or other possessions.

Other

Caution:

• Do not wash the air conditioner units. Washing them may cause an electric shock.

1.4. Before starting the test run

Caution:

• After completing installation work, make sure that refrigerant gas is not leaked. If refrigerant gas is leaked and exposed to fan heater, stove, oven and so on, it may generate noxious gases.

• Before starting operation, check that all panels, guards and other protective parts are correctly installed. Rotating, hot or high voltage parts can cause injuries.

• Do not touch the refrigerant pipes with bare hands during operation. The refrigerant pipes are sometimes hot and sometimes cold depending on the condition of the flowing refrigerant. Your hands may suffer burns or frostbite if you touch the pipes.

• Turn on the main power switch more than twelve hours before starting operation. Starting operation just after turning the main power switch on can result in severe damage to internal parts. Keep the main power switch turned on during the operation season.

• Keep the outlets and inlets free of obstacles. Otherwise, the performance may be reduced or operation may stop.

• Do not touch any switch with wet fingers, as this can cause an electric shock.

• Do not operate the air conditioner without the air filter set in place. Dust may accumulate, and cause a failure.

• After stopping operation, be sure to wait for five minutes before turning off the main power switch. Otherwise, water leakage or unit failure may occur.

2. Indoor unit accessories

The unit is provided with the following accessories:

Part No.

1 Insulated pipe (small) 1 2 Insulating cover 1 3 Tie band (large) 6 4 Drain hose 1 5 Washer 8

Accessories Qty Place to Set

On the body frame casing

3. Selecting an installation site

• Select a location so that air can be blown into all corners of the room.

• Avoid locations exposed to outside air.

• Select a location free of obstructions to the airflow in and out of the

unit.

• Avoid locations exposed to steam or oil vapour.

• Avoid locations where combustible gas may leak, settle or be gener-

ated.

• Avoid installation near machines emitting high-frequency waves (highfrequency welders, etc.)

• Avoid locations where the airflow is directed at a fire alarm sensor. (Hot air could trigger the alarm during the heating operation.)

• Avoid places where acidic solutions are frequently handled.

• Avoid places where sulphur-based or other sprays are frequently used.

Warning:

Install the indoor unit on a ceiling strong enough to sustain its weight. If the ceiling lacks strength, it may cause the unit to fall down, resulting in an injury.

3.1. Securing installation and service

space

Part No.

6 Tie band (small) 2 7 Insulated pipe (large) 1 8 Piping manual 1 9 Tape 1

Model name 20 · 25 · 32 40 · 50 63 · 80 100 · 125

A 1060 1300 1650 2000 B More than 1000 C More than 500 D Lap: 20 E 360

Accessories Qty Place to Set

Connector for drain pump test

On the body frame casing

3.2. Split flow duct end connection - fresh air intake

45°

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• Select a blowout direction suited for room shape, installation site and so on.

• Piping, wiring and maintenance are all done on the bottom and the side. So, secure the space given above for such work. Also, taking into consideration serviceability and safety in hanging, secure as large space as possible.

670

181

90˚

90°

ø172

145

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