Tabla De Contenido; Safety Precautions; Selecting A Location For Installation - Mitsubishi Electric PAC-AK50BC Para El Instalador

Contents
1. Safety precautions ................................................................................... 2
2. Selecting a location for installation ........................................................... 2
3. Confirming Supplied Accessories ............................................................ 3
4. Dimensions and required Servicing space of Branch Box ....................... 3
5. Refrigerant piping .................................................................................... 4
This installation manual is only for the branch box installation. In installing the indoor units and outdoor units, refer to the installation manual attached to each
unit.

1. Safety precautions

s Before installing the unit, make sure you read all the "Safety precau-
tions".
s Please report to your supply authority or obtain their consent before
connecting this equipment to the power supply system.
Warning:
Describes precautions that must be observed to prevent danger of injury or
death to the user.
Caution:
Describes precautions that must be observed to prevent damage to the unit.
Warning:
• Ask a dealer or an authorized technician to install the unit.
• For installation work, follow the instructions in the Installation Manual and
use tools and pipe components specifically made for use with refrigerant
specified in the outdoor unit installation manual.
• The unit must be installed according to the instructions in order to minimize
the risk of damage from earthquakes, typhoons, or strong winds. An incor-
rectly installed unit may fall down and cause damage or injuries.
• The unit must be securely installed on a structure that can sustain its weight.
• 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. Should the refrigerant leak and cause
the concentration limit to be exceeded, hazards due to lack of oxygen in the
room may result.
• Ventilate the room if refrigerant leaks during operation. If refrigerant comes
into contact with a flame, poisonous gases will be released.
• All electric work must be performed by a qualified technician according to
local regulations and the instructions given in this manual.
• Use only specified cables for wiring.
• The terminal block cover panel of the unit must be firmly attached.
• Use only accessories authorized by Mitsubishi Electric and ask a dealer or
an authorized technician to install them.
• The user should never attempt to repair the unit or transfer it to another loca-
tion.

2. Selecting a location for installation

* The branch box is only for indoor use.
Please attach the special optional cover (PAC-AK350CVR-E) to install the branch
box in the outdoors.
• Ensure that the branch box is installed in a location which facilitates servicing and
maintenance. (ensure that the required maintenance hole or service space is
available).
• Do not install near bedrooms. The sound of refrigerant flowing through the
piping may sometimes be audible.
• Ensure that it is located where noise in operation will not be a problem.
After power is supplied or after an operation stop for a while, a small clicking
noise may be heard from the inside of the branch box. The electronic expan-
sion valve is opening and closing. The unit is not faulty.
• Determine the route of refrigerant piping, drain piping, and electrical wiring be-
forehand.
2
6. Mounting the branch box ......................................................................... 5
7. Installing refrigerant piping ....................................................................... 5
8. Installing Drain piping .............................................................................. 6
9. Electrical work .......................................................................................... 7
10. Test run .................................................................................................... 9
After installation work has been completed, explain the "Safety Precautions," use,
and maintenance of the unit to the customer according to the information in the Op-
eration Manual and perform the test run to ensure normal operation. Both the Instal-
lation Manual and Operation Manual must be given to the user for keeping. These
manuals must be passed on to subsequent users.
: Indicates a part which must be grounded.
Warning:
Carefully read the labels affixed to the main unit.
• After installation has been completed, check for refrigerant leaks. If refriger-
ant leaks into the room and comes into contact with the flame of a heater or
portable cooking range, poisonous gases will be released.
• Be sure to connect the power supply cords and the connecting wires for the
indoor units, outdoor units, and branch boxes directly to the units (no inter-
mediate connections).
Intermediate connections can lead to communication errors if water enters
the cords or wires and causes insufficient insulation to ground or a poor
electrical contact at the intermediate connection point.
(If an intermediate connection is necessary, be sure to take measures to pre-
vent water from entering the cords and wires.)
Caution:
• Make sure that the refrigerant pipes are well insulated to prevent condensa-
tion.
Incomplete insulation may cause condensation on the surface of pipes, wet-
ting of the ceiling, floor and other important properties.
• Make sure that the drainage pipe is carried out correctly following this manual
and that it is insulated in order to prevent condensation.
Any deficiency caused by piping may result in water leakage, wetting of the
ceiling, floor and other personal properties.
• Ensure that the location of the installation is such that the length of refrigerant
piping is within the specified limits.
• Ensure that the unit is out of reach of children at least 1.8 m above the floor.
• Do not install in location that is hot or humid for long periods of time.
• Ensure that the branch box is installed above the ceiling of corridor, bath room,
etc., where persons are not regularly there (Avoid installing at around center of
the room.) for maintenance.
• Ensure that the location of the installation is such that the down-gradient of the
drain piping is greater than 1/100.
* Ensure that the unit is installed in a location able to support its weight.
Warning:
Ensure that the unit is installed firmly in a location able to support its weight.
If the installation is of insufficient strength the unit may fall, resulting in injury.