Installation Manual
Model : D4PBB
ENGLISH
FRANÇAIS
ESPAÑOL
960-911-10
FLEX MULTI SPLIT INSTALLATION
INSTRUCTIONS
Safety Precautions
Installation Manual 3
ENGLISH
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness
is classified by the following indications.
n Be sure to observe the cautions specified here as they include important items related to safety.
n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
n Meanings of symbols used in this manual are as shown below.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
Be sure not to do.
Be sure to follow the instruction.
Be sure to establish an earth connection.
Safety Precautions
WARNING
For electrical work, contact the
dealer, seller, a qualified
electrician, or an Authorized
Service Center.
• Do not disassemble or repair the
product. There is risk of fire or
electric shock.
Be cautious when unpacking and
installing the product.
• Sharp edges could cause injury. Be
especially careful of the case edges
and the fins on the condenser and
evaporator.
Install the panel and the cover of
control box securely.
• There is risk of fire or electric shock.
4 Branch Distributor
Safety Precautions
Do not place anything on the
power cable.
• There is risk of fire or electric shock.
Take care to ensure that power
cable could not be pulled out or
damaged during operation.
• There is risk of fire or electric shock.
Do not place a heater or other
appliances near the power cable.
• There is risk of fire and electric
shock.
Always ground the product.
There is risk of fire or electric shock
Do not install, remove, or re-install
the unit by yourself (customer).
• There is risk of fire, electric shock,
explosion, or injury.
Do not allow water to run into
electric parts.
• It may cause there is risk of fire,
failure of the product, or electric
shock.
For installation, always contact the
dealer or an Authorized Service
Center.
• There is risk of fire, electric shock,
explosion, or injury
Do not modify or extend the power
cable.
• There is risk of fire or electric shock.
Do not install the product on a
defective installation stand.
• It may cause injury, accident, or
damage to the product.
Installation Manual 5
ENGLISH
CAUTION
Parts
1. INSTALLATION MANUAL
2. HANGER METAL
3. SCREWS
4. INSULATION PE
1 pc
4 pcs
8 pcs
2 pcs
Items to be prepared in the field
• Connecting wires
(AWG 18-4, AWG 16-4)
• Installation parts
(Hanging bolts: 4 x M10 or M8, Nuts: 12, flat
washers:8)
• Screws for wall-mounting : 6 x M5
• Insulation
• Brass cap
• Aluminum tape
If strange sound, or smell or smoke comes from
product.
• Turn the breaker off or disconnect the power supply
cable. There is risk of electric shock or fire
Do not let the air conditioner run for a long time when
the humidity is very high and a door or a window is
left open.
• Moisture may condense and wet or damage furniture.
Keep level even when installing
the product.
• To avoid vibration or water leakage.
Always check for gas (refrigerant)
leakage after installation or repair
of product.
• Low refrigerant levels may cause
failure of product.
Do not step on or put anyting on
the product. (outdoor units)
• There is risk of personal injury and
failure of product.
sj"
Safety Precautions
6 Branch Distributor
Parts
PRECAUTIONS FOR SELECTING THE LOCATION
The BD unit is for indoor use. Install in a location such as above a ceiling or behind a wall in
accordance with the following conditions:
• That the unit is fully supported, and is in a location with little or no vibration.
• That the refrigerant pipes for the indoor and outdoor units can be repaired with ease, and that
the units are placed well within the distance from each other allowed by the pipe length.
• That there is nothing nearby that produces heat or steam(gas).
• When installing, that there is enough carity for servicing the unit.
• Do not install in location that is hot or humid for long periods of time.
• A well-ventilated area.
• Do not install near bedrooms. The sound of refrigerant flowing through the piping may
sometimes be audible. For restrictions on installation, refer to "INSTALLATION".
System Layout
For installation of the indoor units. Follow the instructions in the installation manual for each unit.
Do not connect more than 8 indoor units together choose the distributor unit type
(2rooms,3rooms or 4rooms) according to the installation pattern
Distributor Unit
h1
A
Branch Pipe
Main Pipe
Distributor
Distributor
B
h2
R410A
4 D4PBB
Rooms
Refrigerant
Installation Manual 7
ENGLISH
Installation
• This unit may be installed suspended from the ceiling or mounted on the wall.
• This unit may only be installed horizontally , as shown in the diagram below.(Side B is facing up)
However, it may be freely installed in any direction forward or back, and to the sides.
• Be sure to leave a 2ft square opening for service and inspection as shown in the diagram below,
for both ceiling - suspended installation and wall-mounted installation.
• This unit "does not require drain treatment" as it uses internal foam treatment as low-pressure
piping insulation.
• Service direction is the side B and C
• The piping for the indoor unit may be led around in direction A
• The inclination of side B must be within ±5 degrees forward or back or to the sides.
Min 15 3/4
Min 1 3/16
Min 3 15/16
Min 15 3/4
Branch Pipe
17
6 5/16
Cover Control
Main Pipe
(Servicing space)
B
C
Inspection opening
Min 11 13/16
Min 11 13/16
11 23/32
9 27/32
Ø3/4
Ø3/8
Suspension bolt pitch.
9 21/32
13 9/32
A
Unit : inch
Installation
8 Branch Distributor
Installation of The Main Unit
Installation of The Main Unit
:
• This unit has two different installation types:
(1) Ceiling-suspended type and (2) wall-mounted type.
• Choose the proper installation pattern according to the
location of installation.
• The installation location for printed wiring board can be
changed.
Follow the procedure specified in the "CONNECTING
THE WIRING" section to change the location.
NOTICE
(1) Ceiling-suspended type
(2) Wall-mounted type
Screws(M5)
Screws(M5)
(locally procude)
(locally procude)
Screws(M5)
(locally procude)
BD unit
Six-sided Nut
Six-sided Nut
(M10 or M8)
(M10 or M8)
Six-sided Nut
(M10 or M8)
Hanger metal
Hanger metal
Hanger metal
Flat washer
Flat washer
Flat washer
Hanging bolt
Hanging bolt
Hanging bolt
(M10 or M8)
15.0(19/32)
Unit : mm(inch)
Procedure
(1) Fix the fumished hanger metal with two screws.(4 locations in
total).
(2) Using an insert-hole-in- anchor, hang the hanging bolt.
(3) Install a hexagon nut and a flat washer (locally-procured)to
the hanging bolt as shown in the figure in the left, and ift the
main unit to hang on the hanger metal.
(4) After checking with a level that the unit is level, tighten the
hexagon nut.
* The tilt of the unit should be within ±5° in front/back and
left/right.
Procedure
(1) Fix the fumished hanger metal with two screws.
(3 locations in total).
(2) After checking with a level that the unit is level, fix the
unit with the furnished wood screws.
* The tilt of the unit should be within ±5° in front/back and
left/right.
* Block up the parts of hanger holes (2 places) by using
insulation PE after installing the hanger.
CAUTIONS
• Once a screw-hole on the main unit has had a screw hammered in, make sure to either hammer it again
or cover it with alumium tape.(This is to prevent condensation)
• Be sure to install the unit with the ceiling-sie up.
• Do not install near bedrooms. the sound of refrigerant flowing through the piping may sometimes be
audible.
(1) Ceiling-suspended type (2) Wall-mounted type
Installation Manual 9
ENGLISH
Connection of Piping
• When connecting indoor units, make sure to connect refrigerant pipes and connection wires to the appropriate
connection ports maked with matching alphabets. (A, B, C, D)
:
• Be sure to mark all the local refrigerant piping(liquid
pipes, gas pipes, etc.) for each indoor unit designating
clearly which room it belongs in.(A, B, C, D)
NOTICE
:
For flaring work the piping, follow the instructions in the installation manual to each unit.
NOTICE
Connecting the pipings to the indoor
unit and drain hose to drain pipe
1. Align the center of the pipings and sufficiently
tighten the flare nut by hand.
2. Tighten the flare nut with a wrench.
Wrap the insulation material around
the connecting portion.
1. Overlap the connection pipe insulation
material and the indoor unit pipe insulation
material. Bind them together with vinyl tape
so that there is no gap.
2. Wrap the area which accommodates the rear
piping housing section with vinyl tape.
Close up a socket for unoccupied
room with a brass cap.
1. Align the center of the piping and sufficiently
tighten the brass cap by hand.
2. Tighten the brass cap with a wrench.
3. Wrap the joint part with insulation.
BD Unit Socket Flare nut Pipes
Wrench
BD Unit Socket
Open-end wrench (fixed)
Connection pipe
Flare nut
Vinyl tape(narrow)
BD Unit
Connecting cable
Vinyl tape (wide)
Wrap with vinyl tape
Indoor unit pipe
Pipe
BD Unit Socket Pipe sealed
or welded
Brass cap
DCBA
CAUTIONS
• Never use the plastic cap for sealing.
• Make sure to use brass cap with the end of
pipe sealed or welded tightly.
Connection of Piping
Outside diameter Torque
mm inch N. m kgf.m lbf.ft
Ø6.35 1/4 14~18 1.4~1.8 10~13
Ø9.52 3/8 34~42 3.5~4.3 25~31
Ø12.7 1/2 49~61 5.0~6.2 36~45
Ø15.88 5/8 69~82 7.0~8.4 51~60
Ø19.05 3/4 100~120 10.0~12.2 73~88
10 Branch Distributor
Connection of Wiring
Connection of Wiring
• Connect refrigerant pipes and connection wires to the appropriate ports maked with matching
alphabets (A, B and C) on this unit.
• Follow the instructions on the wiring nameplate to connect the connection wires of indoor/outdoor
units to terminal board numbers.(1, 2 and 3) Always fix each ground wire separately with a ground
screw.(See the figure below.)
• After completing the wiring, fix the outer coating of wires securely with wire clamps. The wire
clamp on indoor unit side is furnished. Follow the procedure below to install.
• Refer to the circuit diagram on the control cover inside outdoor unit.
:
The terminal board numbers are arranged from top to bottom in order of 1, 2 and 3.
NOTICE
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