Mitsubishi Electric FDT125VNVF Technical Manual page 226

DUCT CONNECTED HIGH STATIC PRESSURE TYPE
AIR CONDITIONING UNIT INSTALLATION MANUAL
(b) Models FDU200, 250
This manual is for the installation of an indoor unit.
For electrical wiring work (Indoor), refer to page 248. For remote controller installation, refer to
page 259. For wireless kit installation, refer to page 486. For electrical wiring work (Outdoor) and
refrigerant pipe work installation for outdoor unit, refer to page 273.
SAFETY PRECAUTIONS
● Read the "SAFETY PRECAUTIONS" carefully first of all and then strictly follow it during the installation work
in order to protect yourself.
● The precautionary items mentioned below are distinguished into two levels,
: Wrong installation would cause serious consequences such as injuries or death.
: Wrong installation might cause serious consequences depending on circumstances.
CAUTION
Both mentions the important items to protect your health and safety so strictly follow them by any means.
●The meanings of "Marks" used here are as shown on the right:
Never do it under any circumstances. Always do it according to the instruction.
●After completing the installation, do commissioning to confirm there are no abnormalities, and explain to the
customers about "SAFETY PRECAUTIONS", correct operation method and maintenance method (air filter
cleaning, operation method and temperature setting method) with user's manual of this unit.
Ask your customers to keep this installation manual together with the user's manual. Also, ask them to hand
over the user's manual to the new user when the owner is changed.
WARNING
●Installation should be performed by the specialist.
If you install the unit by yourself, it may lead to serious trouble such as water leakage, electric shock, fire, and injury due to overturn
of the unit.
●Install the system correctly according to these installation manuals.
Improper installation may cause explosion, injury, water leakage, electric shock, and fire.
●Check the density refered by the foumula (accordance with ISO5149).
If the density exceeds the limit density, please consult the dealer and installate the ventilation system.
●Use the genuine accessories and the specified parts for installation.
If parts unspecified by our company are used it could cause water leakage, electric shock, fire, and injury due to overturn of the unit.
●Ventilate the working area well in case the refrigerant leaks during installation.
If the refrigerant contacts the fire, toxic gas is produced.
●Install the unit in a location that can hold heavy weight.
Improper installation may cause the unit to fall leading to accidents.
●Install the unit properly in order to be able to withstand strong winds such as typhoons, and earthquakes.
Improper installation may cause the unit to fall leading to accidents.
●Do not mix air in to the cooling cycle on installation or removal of the air conditioner.
If air is mixed in, the pressure in the cooling cycle will rise abnormally and may cause explosion and injuries.
●Be sure to have the electrical wiring work done by qualified electrical installer, and use exclusive circuit.
Power source with insufficient capacity and improper work can cause electric shock and fire.
●Use specified wire for electrical wiring, fasten the wiring to the terminal securely, and hold the cable securely in
order not to apply unexpected stress on the terminal.
Loose connections or hold could result in abnormal heat generation or fire.
●Arrange the electrical wires in the control box properly to prevent them from rising. Fit the lid of the services
panel property.
Improper fitting may cause abnormal heat and fire.
●Check for refrigerant gas leakage after installation is completed.
If the refrigerant gas leaks into the house and comes in contact with a fan heater, a stove, or an oven, toxic gas is produced.
●Use the specified pipe, flare nut, and tools for R410A.
Using existing parts (R22) could cause the unit failure and serious accident due to explosion of the cooling cycle.
●Tighten the flare nut according to the specified method by with torque wrench.
If the flare nut were tightened with excess torque, it could cause burst and refrigerant leakage after a long period.
●Do not put the drainage pipe directly into drainage channels where poisonous gases such as sulfide gas can
occur.
Poisonous gases will flow into the room through drainage pipe and seriously affect the user's health and safety. This can also
cause the corrosion of the indoor unit and a resultant unit failure or refrigerant leak.
●Connect the pipes for refrigeration circuit securely in installation work before compressor is operated.
If the compressor is operated when the service valve is open without connecting the pipe, it could cause explosion and injuries due
to abnormal high pressure in the system.
●Stop the compressor before removing the pipe after shutting the service valve on pump down work.
If the pipe is removed when the compressor is in operation with the service valve open, air would be mixed in the refrigeration circuit
and it could cause explosion and injuries due to abnormal high pressure in the cooling cycle.
●Only use prescribed optional parts. The installation must be carried out by the qualified installer.
If you install the system by yourself, it can cause serious trouble such as water leaks, electric shocks, fire.
●Do not repair by yourself. And consult with the dealer about repair.
Improper repair may cause water leakage, electric shock or fire.
●Consult the dealer or a specialist about removal of the air conditioner.
Improper installation may cause water leakage, electric shock or fire.
●Turn off the power source during servicing or inspection work.
If the power is supplied during servicing or inspection work, it could cause electric shock and injury by the operating fan.
●Do not run the unit when the panel or protection guard are taken off.
Touching the rotating equipment, hot surface, or high voltage section could cause an injury to be caught in the machine, to get
burned, or electric shock.
●Shut off the power before electrical wiring work.
It could cause electric shock, unit failure and improper running.
● Perform earth wiring surely.
Do not connect the earth wiring to the gas pipe, water pipe, lightning rod and telephone earth wiring. Improper earth could
cause unit failure and electric shock due to a short circuit.
● Earth leakage breaker must be installed.
If the earth leakage breaker is not installed, it can cause electric shocks.
● Use the circuit breaker of correct capacity. Circuit breaker should be the one that disconnect all
poles under over current.
Using the incorrect one could cause the system failure and fire.
● Do not use any materials other than a fuse of correct capacity where a fuse should be used.
and .
Connecting the circuit by wire or copper wire could cause unit failure and fire.
CAUTION
● Do not install the indoor unit near the location where there is possibility of flammable gas leakages.
If the gas leaks and gathers around the unit, it could cause fire.
● Do not install and use the unit where corrosive gas (such as sulfurous acid gas etc.) or flammable gas (such
as thinner, petroleum etc.) may be generated or accumulated, or volatile flammable substances are handled.
It could cause the corrosion of heat exchanger, breakage of plastic parts etc. And inflammable gas could cause fire.
● Secure a space for installation, inspection and maintenance specified in the manual.
Insufficient space can result in accident such as personal injury due to falling from the installation place.
● Do not use the indoor unit at the place where water splashes such as laundry.
Indoor unit is not waterproof. It could cause electric shock and fire.
● Do not use the indoor unit for a special purpose such as food storage, cooling for precision
instrument, preservation of animals, plants, and a work of art.
It could cause the damage of the items.
● Do not install nor use the system near equipments which generate electromagnetic wave or high harmonics.
Equipments like inverter equipment, private power generator, high-frequency medical equipment, or telecommunication
equipment might influence the air conditioner and cause a malfunction and breakdown. Or the air conditioner might
influence medical equipments or telecommunication equipments, and obstruct their medical activity or cause jamming.
● Do not install the remote controller at the direct sunlight.
It could cause breakdown or deformation of the remote controller.
● Do not install the indoor unit at the place listed below.
· Places where flammable gas could leak.
· Places where carbon fiber, metal powder or any powder is floated.
· Place where the substances which affect the air conditioner are generated
such as sulfide gas, chloride gas, acid, alkali or ammonic atmospheres.
· Places exposed to oil mist or steam directly.
· On vehicles and ships
· Places where machinery which generates high harmonics is used.
● Do not install the indoor unit in the locations listed below (Be sure to install the indoor unit
according to the installation manual for each model because each indoor unit has each limitation)
· Locations with any obstacles which can prevent inlet and outlet air of the unit
· Locations where vibration can be amplified due to insufficient strength of structure.
· Locations where the infrared receiver is exposed to the direct sunlight or the strong light beam. (in case of the
infrared specification unit)
· Locations where an equipment affected by high harmonics is placed. (TV set or radio receiver is placed within 5m)
· Locations where drainage cannot run off safely.
It can affect performance or function and etc..
● Do not put any valuables which will break down by getting wet under the air conditioner.
Condensation could drop when the relative humidity is higher than 80% or drain pipe is clogged, and it damages user's belongings.
● Do not use the base frame for the outdoor unit which is corroded or damaged after a long period of use.
It could cause the unit falling down and injury.
● Pay attention not to damage the drain pan by weld sputter when brazing work is done near the unit.
If sputter entered into the unit during brazing work, it could cause damage (pinhole) of drain pan and leakage of water.
To avoid damaging, keep the indoor unit packed or cover the indoor unit.
● Install the drain pipe to drain the water surely according to the installation manual.
Improper connection of the drain pipe may cause dropping water into room and damaging user's belongings.
● Do not share the drain pipe for indoor unit and GHP (Gas Heat Pump system) outdoor unit.
Toxic exhaust gas would flow into room and it might cause serious damage (some poisoning or deficiency of oxygen) to
user's health and safety.
● Be sure to perform air tightness test by pressurizing with nitrogen gas after completed refrigerant piping work.
If the density of refrigerant exceeds the limit in the event of refrigerant leakage in the small room, lack of oxygen can
occur, which can cause serious accidents.
● For drain pipe installation, be sure to make descending slope of greater than 1/100, not to make traps,
and not to make air-bleeding.
Check if the drainage is correctly done during commissioning and ensure the space for inspection and maintenance.
● Ensure the insulation on the pipes for refrigeration circuit so as not to condense water.
Incomplete insulation could cause condensation and it would wet ceiling, floor, and any other valuables.
● Do not install the outdoor unit where is likely to be a nest for insects and small animals.
Insects and small animals could come into the electronic components and cause breakdown and fire. Instruct the user to
keep the surroundings clean.
● Pay extra attention, carrying the unit by hand.
Carry the unit with 2 people if it is heavier than 20kg. Do not use the plastic straps but the grabbing place, moving the unit
by hand. Use protective gloves in order to avoid injury by the aluminum fin.
● Make sure to dispose of the packaging material.
Leaving the materials may cause injury as metals like nail and woods are used in the package.
● Do not operate the system without the air filter.
It may cause the breakdown of the system due to clogging of the heat exchanger.
● Do not touch any button with wet hands.
It could cause electric shock.
● Do not touch the refrigerant piping with bare hands when in operation.
The pipe during operation would become very hot or cold according to the operating condition, and it could cause a burn or frostbite.
● Do not clean up the air conditioner with water.
It could cause electric shock.
● Do not turn off the power source immediately after stopping the operation.
Be sure to wait for more than 5 minutes. Otherwise it could cause water leakage or breakdown.
● Do not control the operation with the circuit breaker.
It could cause fire or water leakage. In addition, the fan may start operation unexpectedly and it may cause injury.
225
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'12 • PAC-T-174
PJD012D053
PJD012D053
CAUTION
· Places where cosmetics or special sprays are
frequently used.
· Highly salted area such as beach.
· Heavy snow area
· Places where the system is affected by
smoke from a chimney.
· Altitude over 1000m
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250