Buiit-In Installation; Pipe Connection - Hitachi Raf-25Nh5 Montageanleitung

3. Fixing the indoor unit
Fixing the top of indoor unit
ø9 rear fixing hole for anchor
bolt or screw of accessory.
WARNING
420mm 165mm
Even if there is space between the
indoor unit and the back wall,
make sure to securely attach the
indoor unit to the wall, ceiling or
floor using wire to prevent it from
falling.
65mm
Drain hose make lower
than center of the hole.
Fixing the base of indoor unit
• Fix the base of indoor unit on the floor with 4.1 × 32mm screws. (Right and left)
3 Screw 3 Screw
• To drill holes, either Case 1 or 2 may be used.
Case 1
1. Drill holes on floor. 2. Push plug into the holes.
3 Screw
Indoor unit
ø4.8mm
Floor
Plug
(Procure locally)

BUIIT-IN INSTALLATION

1 If upper or lower air outlet is covered with the lattice door, room temperature may not be controlled properly. Therefore, air
outlet must be open as much as possible.
2 If air deflector of upper air outlet is adjusted too much upward, room temperature may not be controlled properly due to the
heat inside the lattice door. Therefore, the deflector must be adjusted to nearly horizontal angle.
3 If signal receiver is covered with the lattice door, signal receiving distance or range (angle) becomes smaller. Therefore,
signal receiver must not be covered with the lattice door.
4 Only the vertical lattice door may be used. Be sure to use a lattice door with an open area ratio of 75% or more. If another
lattice door or one with an open area ratio of less than 75% is used, maximum performance may not be obtained.
5 With a built-in installation, it may take more time to reach the set temperature after the unit is switched on.
Upper air outlet
Above 150
Above 100
(Unit: mm)
Lower air outlet
4. Installation of refrigerating pipes and air removal
4.1
Preparation of pipe
• Use a pipe cutter to cut the copper pipe.
Trimming tool
Copper pipe
• Before flaring, please put on the flare nut.
Die
Outer Diameter (ø)
For R410A tool
6.35 (1/4")
9.52 (3/8")
12.7 (1/2")
4.2

Pipe connection

In case of removing flare nut of a indoor unit, first remove a nut of small diameter
CAUTION side, or a seal cap of big diameter side will fly out. Free from water into the piping
when working.
• 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.
Flare nut
Small diameter side
Wrench
Large diameter side
Torque
wrench
Valve head
cap
Gas leakage inspection
Please use gas leakage detector to check if leakage occurs at
connection of flare nut as shown on the right.
If gas leakage occurs, further tighten the connection to stop leakage.
(Use the detector provided for R410A.)
< S672 : A >
In the case of fixing by the anchor bolt
Bury the ø6 anchor bolt into the wall as shown in below.
Lift up the indoor unit slightly and hang.
In the case of fixing by the screw of accessory
Bury the plug into the wall as shown in below to attach
the screw 9. Lift up the indoor unit slightly and hang.
9 Screw
Wall 32mm
• When fixing the indoor
WARNING
unit above the ground,
Be sure to attach screw
be sure to fix an L-angle
3 to prevent the indoor
at the bottom to support
unit from overturn.
it.
Case 2
1. Drill holes on floor. 2. Push plug into the holes.
Indoor unit
Floor
(The plug can be secured diagonally with a screw as shown above.)
Signal receiver
Lattice door
Above 200
Air conditioner
Below 20
CAUTION
• Jagged edge will cause leakage.
• Point the side to be trimmed downwards during trimming to
prevent copper chips from entering the pipe.
Die
• Please use exclusive tool.
A
Copper pipe
A (mm) Rigid Flaring Tool
For R22 tool
0 – 0.5 1.0
0 – 0.5 1.0
0 – 0.5 1.0
Outer diameter Torque N·m
of pipe (ø) (kgf·cm)
6.35 (1/4") 13.7 – 18.6 (140 – 190)
9.52 (3/8") 34.3 – 44.1 (350 – 450)
12.7 (1/2") 44.1 – 53.9 (450 – 550)
Small diameter side 6.35 (1/4") 19.6 – 24.5 (200 – 250)
9.52 (3/8") 19.6 – 24.5 (200 – 250)
Large diameter side
12.7 (1/2") 29.4 – 34.3 (300 – 350)
Valve core cap 12.3 – 15.7 (125 – 160)
5. Connection of the connecting cord
(1) Remove the cover of the electric box.
(2) Connect the connecting cords.
(3) Assemble the cover of electric box.
50mm
10mm
10mm
25mm
Connecting cord
Detail of cutting the connecting cord
Plug • THIS APPLIANCE MUST
(Procure locally)
Wall
WARNING
6. Checking of drawing drain hose
(1) Connect the separate drain hose to the drain hose that is attached to the indoor unit.
(2) For keeping the smooth flowing of condensed water the drain hose should be inclined as shown in figure below.
Bad
3 Screw
Bending
upwards
Plug
(Procure locally) CAUTION
7. Installation of remote controller
• The remote controller can be placed in its holder which
is fixed on wall or beam.
• To operate the remote controller at its holder, please
ensure that the unit can receive signal transmitted from
the controller at the place where the holder is to be
fixed. The unit will beep when signal is received from
the remote controller. The signal transmission is weaken
by the fluorescent light. Therefore, during the installation
of the remote control holder, please switch on the light,
even during day time, to determine the mounting location
of the holder.
8. Final stage of installation
8.1
Insulation and maintenance of pipe connection
• The connected terminals should be completed sealed with heat insulator
and then tied up with rubber strap.
• Please tie the pipe and power line together with vinyl tape as shown in
the figure showing the installation of Indoor and Outdoor units. Then fix
their position with holders.
• 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.
8.2
Operation test
• Please ensure that the air conditioner is in normal operating condition during the operation test.
• Explain to your customer the proper operation procedures as described in the user's manual.
• If the indoor unit does not operate, check to see that the connections are correct.
CAUTION
• Be sure to use both hands to grasp the front panel when removing it or attaching it.
• The front panel may be installed up or down to suit user preference.
Removing
1 Press the hook found at the tip of the resin band installed
inside the front panel's right section to remove the resin
band.
Attaching
1 Attach three front panel bearings to the axis of the front
cover.
Connect the
earth cord
Green-and-yellow
After remove the screw
(ground)
and cover, and put the
connecting cords and fix
the cover with screw.
BE EARTHED.
Bad Bad Bad
Condensed
water pond
Condensed
Ditch
water pond
Please ensure the smooth flow of condensed water of the Indoor unit during installation.
(Carelessness may result in water leakage.)
The controller must be
hooked onto the hook at
the lower par t of the
holder. Push in the
remote controller in the
direction as shown in
figure below.
Trial run should be conducted on one unit at a time to check for incorrect wiring of
connecting cord.
How to install and remove the front panel
2 Pull the front panel down toward you and once fully open,
pull it to remove.
Front cover
Resin band
Hook
Front panel
2 Insert the tip of the resin band into the hole of the
protrusion inside the right section of the front panel.
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
C
along the coated part of the
D
wire using the cord band. Do
not exert pressure on the wire
as this may cause overheating
or fire.
Connection of the connecting cord
Securely screw in the
connecting cord so that it will not
get loose or disconnect.
Tightening torque reference
value: 1.2 to 1.6 N·m (12 to
16 kgf·cm)
Connecting
Excessive tightening may
cord
damage the interior of the cord
requiring replacement.
WARNING
Be sure that the hose is
not loosely connected
or bent.
Screw (2 pieces)
Holder for Remote
Controller
Remote controller
OUTSIDE INSIDE
Sleeve of
protection pipe
Putty
Putty
Resin band