Hitachi RAK-35RPB Installation Manual page 2

2 PIPING FROM THE LEFT SIDE (BACKWARD, DOWNWARD, HORIZONTAL)
Preparation
Changed of Drain Hose and Installation Procedures.
• Exchange the location of drain hose and drain cap while installing the pipe from the left side as
shown in below. Be sure to plug in the drain hose until the insulating material folds upon itself.
• Please use pliers to pull out the drain cap.
(This is an easier way to remove the drain
cap).
Drain cap
Drain Hose
• Remove low cover
• Insert drain cap up to the
location securely till the
cap stops.
Drain cap
CAUTION
• The rubber strap used for fixing the insulator should not
be tied with great force. Otherwise,this will damage heat
insulation and causes water condensation.
• Please pull the lower part of the Indoor unit outwards to
check if the unit is hooked onto the hanger. Improper
installation may cause vibration and noise.
• Transform the piping while holding down the lower portion
of pipe-support by hand.
INSTALLATION AFTER CONNECTION OF REFRIGERATING PIPES
• The refrigerating pipe should be adjusted to fit into
the hole on the wall and then ready for further
connection.
• The terminals of 2 connected pipes must be covered
with insulator used for terminal connection. Then the
pipes are wrapped with insulation pipe.
• Connect the connecting cord after removing low
cover.
(Refer to "CONNECTION OF POWER CORD")
• After adjustment, fit the connecting cord and pipes
into the space available under the unit. Use holder to
hold them tight.
• Holder can be attached at the either of 2 places.
Please select the easier position.
THE CONNECTION OF REFRIGERATING PIPE DURING
THE INSTALLATION OF INDOOR UNIT
Preparation To Install Refrigerating Pipes
• The refrigerating pipes and connecting cord
transform and are attached.
Please bend at a small
Installation
radius to form an arc
Hang the indoor unit onto the hanger. Use the temporary stand
at the back of the Indoor unit to push its lower part 15cm
forwards.
• Place the drain hose through the hole on the wall.
• Wrap the refrigerating pipes with insulation pipe after
connecting refrigerating pipe.
• Connect the connecting cord after removing low cover.
(Refer to "Connection of Power Cord")
• After adjustment, the connecting cord and refrigerating pipes
are placed into the space available under the Indoor unit.
• The projection of Indoor unit must hook to the hanger.
Wall hole
Refrigerating
Pipe
pipe
Drain Pull this to the front during the
Cable
hose Heat
connection of refrigerating
Drain layout of
insulation pipe
pipe to ease task.
Connecting
backward piping
cord
from left
3 Heat Insulation and Finish of the Piping
• The connected terminals should be completed sealed
with heat insulator and then tied up with rubber strap.
• Do not tie the terminals with the tape too tight.
If any clearance or over-tightening may cause
condensation.
• Please tie the pipe and power line together with vinyl
tape as shown in the figure showing the installation of
Indoor and Outdoor units.
• To enhance the heat insulation and to prevent water
condensation, please cover the outdoor part of the
drain hose and pipe with insulation pipe.
• Completely seal any gap with putty.
4 Installation of Drain Hose
Ditch
Condensed water
pond
Bending upwards Condensed water
pond
You are free to choose the side (left or right) for the installation of drain
hose. Please ensure the smooth flow of condensed water of the Indoor
CAUTION
unit during installation. (Careless may result in water leakage.)
HOW TO REMOVE INDOOR UNIT
• Push up the [PUSH] sections at the bottom of the indoor unit
and pull the bottom plate towards you. Then the claws are
released from the stationary plate.
(The [PUSH] sections are indicated by 2 arrows in the right
figure)
RAK-35_50RPB_IM_English 2
CAUTION
Insufficient insert may
result in water leakage.
• Push the pipe deeply until the insulating
section of the drain hose end gets over the
rib at the indoor unit side.
Pipe
Rubber strap tied
with great force
Pipe
support
Transform after
bending downward.
Drain hose
Connecting
Pipe
cord
Insulation pipe (must be wrapped with
vinyl tape at every 120 mm)
Detail of Cutting the Connecting Cord
The end of the refrigerating pipes are at
locations marked with " " symbol.
below
5mm
Projection
Hook
Wiring of The Indoor Unit
about 15cm
Protection
pipe
Drain hose
Connected
Connecting cord
section
Insulation material for pipe
connection
Sleeve of
protection pipe
Putty
Putty
CAUTION
Be sure that the drain hose is
not loosely connected bend or
proper condition like left figure.
[PUSH] mark positions
INSTALLATION OF REFRIGERATING PIPES AND AIR REMOVAL
1 Preparation of Pipe
• Use a pipe cutter to cut the copper pipe and remove burr.
Trimming tool
Copper pipe
CAUTION
• Remove burr and jagged edge will cause leakage.
• Point the side to be trimmed downwards during
trimming to prevent copper chips from entering the pipe.
• Before flaring, please put on the flare nut.
Die
Die
• Please use
A
exclusive tool for
refrigerant R410A.
Copper pipe
Outer A (mm) Rigid Flaring Tool
Diameter (Ø) For R410A tool For R22 tool
6.35 (1/4") 0 - 0.5
9.52 (3/8") 0 - 0.5
12.7 (1/2") 0 - 0.5
2 Pipe Connection
CAUTION
• In case of removing flare nut of a indoor unit, first remove
a nut of small diameter side, or a seal cap of big diameter
side will fly out. Free from water into the piping when
working.
• Be sure to tighten the flare nut to the specified torque with
a torque wrench.
If the flare nut is overtightened, the nut may be split after a
long period has passed, and may cause a refrigerant leak.
• THIS APPLIANCE MUST BE EARTHED.
WARNING
Indoor Unit
70mm
Green + Yellow
10mm (ground)
Strip
1
wires
2
3
10mm
Connecting cord
45mm
WARNING
• Leave some space in the connecting cord for
maintenance purpose and be sure to secure
it with the cord band.
Secure the connecting cord along the coated part of the wire using
•
the cord band. Do not exert pressure on the wire as this may cause
overheating or fire.
• For wire connection of the Indoor unit, you need to remove the front
cover, the low cover under the body of the unit and terminal cover.
•
Remove the cover from the terminal base and screw the cable.
3
2
Connecting
1
cord
Earth
After remove the screw
and terminal cover, and
put the connecting cords
and fix the terminal cover
with screw.
How to remove the front cover
1 Remove the front panel
1
Push
2
Arm
Arm
Push the end of the right-side arm outward to
1
release the tab.
2
Move the left-side arm outward to release the
left tab, and then pull the panel towards you.
2 Remove the filters.
3 After removing three screws, pull the center of
the front cover towards you and release the claws.
4 Pull the side faces (lower sections) of the front
cover towards you as shown in the figure and
remove the cover.
• Please be careful when bending the copper pipe.
• Screw in manually while adjusting the center.
After that, use a torque wrench to tighten the
connection.
Wrench
Outer diameter
of pipe (ø)
Small diameter side 6.35 (1/4")
. 9 2 5
Large diameter side
2 1
Small diameter side . 6 5 3
Valve head
. 9 2 5
cap Large diameter side
2 1
Valve core cap
1.0
1.0
1.0
Gas leakage inspection
Please use gas leakage detector to check if
leakage occurs at connection of Flare nut
as shown in below. If gas leakage occurs,
further tighten the connection to stop leakage.
Method to remove the low cover
• Pull at the and in
1 2
the directions as shown
by arrows to remove the
cover.
2
How to connect the optional parts
(H-LINK RAC Adapter, Dry contact, Wired Remote
Controller)
• For cable connection to control P.W.B., you need to
remove front cover and electrical box cover.
Each connecting location is as below.
1 Dry contact: CN6
2 H-LINK RAC Adapter：CN7
Wired Remote Control ler : CN20
3
• Please check and confirm manuals attached to each
optional parts for more connection details.
• You can refer to this installation manual how to remove
and re-attach the front cover.
• Please be careful not to damage lead wires by edge of
plate when connecting the optional parts.
CN20
Cord band
CN7
CN6
How to Attach the Front Cover
1 Check that the drain pan is securely attached.
After installing the front cover onto the unit, hook three claws
2
at upper side of the cover securely. Then, push the center of
the front cover to lock the claws.
Tighten the three screws.
3
4 Install the filter.
5
Attaching the Front Panel
• Insert the shaft of the left arm along the step on the unit into
the hole.
• Securely insert the shaft of the right arm along the step on
the unit into the hole.
• Make sure that the front panel is securely attached, and then
close the front panel.
Arm
Step
Flare nut
Torque
wrench
Torque N·m
(kgf·cm)
13.7 – 18.6 (140 – 190)
/ 3 ( ) " 8 4 3 3 . – 4 4 1 . 3 ( 0 5 – 5 4 ) 0
7 . / 1 ( ) " 2 44.1 – 53.9 (450 – 550)
/ 1 ( ) " 4 9 1 6 . – 4 2 5 . 2 ( 0 0 – 5 2 ) 0
/ 3 ( ) " 8 9 1 6 . – 4 2 5 . 2 ( 0 0 – 5 2 ) 0
7 . / 1 ( ) " 2 9 2 4 . – 4 3 3 . 3 ( 0 0 – 5 3 ) 0
12.3 – 15.7 (125 – 160)
1
Arm
Step