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Contents
1. Safety precautions ..................................................................................... 18
1.1. Before installation and electric work .......................................... 18
1.2. Precautions for devices that use R410A refrigerant .................. 19
1.3. Before installation ...................................................................... 19
1.5. Before starting the test run ........................................................ 19
2. About the product ....................................................................................... 20
3. Combination of heat source units .............................................................. 20
............................................................................................. 21
5. Parts list ..................................................................................................... 23
6. Transporting the unit .................................................................................. 23
7. Installation .................................................................................................. 24
7.1. Installation ................................................................................. 24
7.2. Service space ............................................................................ 24
8. Water pipe installation ................................................................................ 24
8.1. Precautions during installation .................................................. 24
8.2. Insulation installation ................................................................. 24
8.3. Water processing and water quality control .............................. 24
8.4. Pump interlock .......................................................................... 25
1. Safety precautions
1.1. Before installation and electric work
Before installing the unit, make sure you read all the
"Safety precautions".
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.
: Beware of electric shock. (This symbol is displayed on the main unit
Warning:
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,
voltage (inverter main circuit) has dropped to DC20V or less.
(It takes about 10 minutes to discharge electricity after the power
supply is turned off.)
Control box houses high temperature parts. Be well careful even after
turning off the power source.
Warning:
Do not use refrigerant other than the type indicated in the manuals
provided with the unit and on the nameplate.
during use, during repair, or at the time of disposal of the unit.
- It may also be in violation of applicable laws.
- MITSUBISHI ELECTRIC CORPORATION cannot be held responsible
for malfunctions or accidents resulting from the use of the wrong type of
refrigerant.
The water circuit should be a closed circuit.
Ask the dealer or an authorized technician to install the air conditioner.
- Improper installation by the user may result in water leakage, electric
Install the unit at a place that can withstand its weight.
damage to the unit.
that the outside force of the cable is not applied to the terminals.
18
9. Refrigerant piping installation ..................................................................... 25
9.1. Caution ...................................................................................... 25
9.2. Refrigerant piping system ........................................................ 26
10. Additional refrigerant charge ...................................................................... 27
......................... 19
10.1. Calculation of additional refrigerant charge ............................... 27
10.3. Airtight test, evacuation, and refrigerant charging ..................... 29
10.4. Thermal insulation of refrigerant piping ..................................... 30
10.5. Installing the water stopper ....................................................... 30
10.6. Installing the sealing material for base leg ................................ 30
11. Wiring (For details, refer to the installation manual of each unit and
11.1. Caution ...................................................................................... 30
11.2. Control box and connecting position of wiring ........................... 31
11.3. Wiring transmission cables ....................................................... 31
11.4. Wiring of main power supply and equipment capacity .............. 33
12. Test run ...................................................................................................... 34
12.1. The following phenomena do not represent faults. ................... 34
13. Information on rating plate ......................................................................... 35
Prepare for strong winds and earthquakes and install the unit at the
damage to the unit.
- Ask an authorized technician to install the accessories. Improper
Never repair the unit. If the air conditioner must be repaired, consult
the dealer.
result.
If refrigerant gas leaks during installation work, ventilate the room.
be released.
Install the air conditioner according to this Installation Manual.
result.
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
Keep the electric parts away from water (washing water etc.).
Securely install the heat source unit terminal cover (panel).
When installing and moving the air conditioner to another site, do not
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,
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.
Do not reconstruct or change the settings of the protection devices.
- If the pressure switch, thermal switch, or other protection device is shorted
To dispose of this product, consult your dealer.
The installer and system specialist shall secure safety against leakage
according to local regulation or standards.
- Choose the appropriate wire size and the switch capacities for the main
power supply described in this manual if local regulations are not available.
Pay special attention to the place of installation, such as a basement,
etc. where refrigeration gas can accumulate, since refrigerant is
heavier than the air.
operation ................................................................................... 28
.................................................................................................. 30
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