8
en
Contents
1.
Safety precautions ............................................................................................8
1.1.
Before installation and electric work ................................................8
1.2.
Precautions for devices that use R32 refrigerant ............................9
1.3.
Before installation ............................................................................9
1.4.
Before installation (relocation) - electrical work ...............................9
1.5.
Before starting the test run ..............................................................9
2.
Selecting an installation site ...........................................................................10
2.1.
About the product ..........................................................................10
2.2.
Installation site ...............................................................................10
2.3.
Securing installation and service space ........................................10
2.4.
Checking the installation site .........................................................10
3.
Installing the hydro unit ...................................................................................11
3.1.
Checking the accessories with the hydro unit ...............................11
3.2.
Installing hydro units ......................................................................11
4.
Connecting refrigerant pipes and drain pipes .................................................11
4.1.
Connecting refrigerant pipes .........................................................11
4.2.
Refrigerant piping work .................................................................12
4.3.
Insulating pipes .............................................................................12
4.4.
Drain piping work ...........................................................................12
5.
Connecting water pipework ............................................................................13
5.1.
Important notes on water pipework installation .............................13
5.2.
Water pipe insulation .....................................................................13
5.3.
Water treatment and quality control ..............................................15
6.
Electrical work .................................................................................................15
7.
Setting addresses and operating units ...........................................................15
8.
Test run ...........................................................................................................15
1. Safety precautions
1.1. Before installation and electric work
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
HIGH VOLTAGE WARNING:
•
Control box houses high-voltage parts.
•
When opening or closing the front panel of the control box, do not let it
come into contact with any of the internal components.
•
Before inspecting the inside of the control box, turn off the power, keep the
unit off for at least 10 minutes.
Warning:
•
Ask the dealer or an authorized technician to install the air conditioner.
- Improper installation by the user may result in water leakage, electric shock, or
fire.
•
Install the unit at a place that can withstand its weight.
- Failure to do so may cause the unit to fall down, resulting in injuries and
damage to the unit.
•
Use the specified cables for wiring. Make the connections securely so that
the outside force of the cable is not applied to the terminals.
- Inadequate connection and fastening may generate heat and cause a fire.
•
Prepare for earthquakes and install the unit at the specified place.
- Improper installation may cause the unit to fall down and result in injury and
damage to the unit.
•
Always use accessories specified by Mitsubishi Electric.
- Ask an authorized technician to install the accessories. Improper installation by
the user may result in water leakage, electric shock, or fire.
•
Never repair the unit. If the air conditioner must be repaired, consult the
dealer.
- If the unit is repaired improperly, water leakage, electric shock, or fire may
result.
•
If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent or similarly qualified persons in order to avoid a hazard.
•
If refrigerant gas leaks during installation work or service, ventilate the room.
- If the refrigerant gas comes into contact with a flame, poisonous gases will be
released.
•
Install the air conditioner according to this Installation Manual.
- If the unit is installed improperly, water leakage, electric shock, or fire may
result.
•
Do not modify or adjust safety protection devices.
- Shorting of pressure or temperature switches to force operation may lead to
damage, fire, explosions etc...
- Do not change the set values as this may lead to damage, fire, explosions etc...
- Use of any product except that specified by this company may lead to damage,
fire, explosions etc...
•
Do not spray water on electrical parts.
- This could lead to shorting, fire, smoke, electrical shock, unit failure etc...
•
Do not create a situation where the refrigeration circuit is sealed yet
incomplete with oil or refrigerant in the system.
- This may result in an explosion.
•
Do not touch electrical components during or directly after operation.
- This may lead to burns.
•
Put covers on control and terminal boxes.
- Shock due to ingress of dust, water, smoke, fire etc. may result.
- During refrigerant recovery or purge, fire may result.
•
Do not operate with guards or panels removed.
- Injury due to rotating parts, electric shock due to high voltage or burns due to
high temperatures may result.
•
Do no sit, ride or place objects on the unit.
- Injury due to the unit falling may result.
•
Use the appropriate safety gear.
- High voltages may result in electric shock.
- Hot parts may result in burns.
•
Recover the refrigerant in the unit.
- Reuse the refrigerant or have it disposed of by a specialist.
- Release of refrigerant may damage the environment.
•
Clear the pipework of remnant gas and oil.
- Failure to do so could lead to an eruption of flames and burns if the pipework is
heated.
•
Vacuum dry the refrigerant pipework. Do not replace with a refrigerant that
has not been specified.
- This could lead to explosions, fire.
•
Do not touch the onsite pipework ends.
- This could damage the pipework leading to refrigerant leaks and oxygen
deficiency.
•
Have all electric work done by a licensed electrician according to “Electric
Facility Engineering Standard” and “Interior Wire Regulations” and the
instructions given in this manual and always use a dedicated power
supply.
- If the power source capacity is inadequate or electric work is performed
improperly, electric shock and fire may result.
•
Securely install the cover of control box.
- If the cover is not installed properly, dust or water may enter the outdoor unit
and fire or electric shock may result.
•
When installing and moving the air conditioner to another site, do not
charge it with a refrigerant different from the refrigerant specified on the
unit.
- If a different refrigerant or air is mixed with the original refrigerant, the
refrigerant cycle may malfunction and the unit may be damaged.
•
If the air conditioner is installed in a small room, measures must be taken
to prevent the refrigerant concentration from exceeding the safety limit if
the refrigerant should leak.
- Consult the dealer regarding the appropriate measures to prevent the safety
limit from being exceeded. Should the refrigerant leak and cause the safety
limit to be exceeded, hazards due to lack of oxygen in the room could result.
•
When moving and reinstalling the air conditioner, consult the dealer or an
authorized technician.
- If the air conditioner is installed improperly, water leakage, electric shock, or fire
may result.
•
After completing installation work, make sure that refrigerant gas is not
leaking.
- If the refrigerant gas leaks and is exposed to a fan heater, stove, oven, or other
heat source, it may generate noxious gases.
Before installing the unit, make sure you read all the “Safety
precautions”.
The “Safety precautions” provide very important points regard-
ing safety. Make sure you follow them.
: Indicates an action that must be avoided.
: Indicates that important instructions must be followed.
: Indicates a part which must be grounded.
: 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.
WT09052X01_en.book 8 ページ ２０１９年１月１７日 木曜日 午前１０時４９分
