Mitsubishi SRK20ZSX-W Technical Manual page 56

6. FORMING PIPING AND DRAIN HOSE
1. Forming piping
Piping is possible in the right, rear, downward, left, left rear or left downward direction.
NOTE
the panels when connecting pipes.
Right
Rear
Left
Downward
rear
Left downward
Left hand side piping
Piping in the left rear direction
Piping in the left direction
7. DRAINAGE WORK
• Arrange the drain hose in a downward angle.
• Avoid the following drain piping.
The drain hose
Higher than
tip is in water.
specified
8. INSTALLING INDOOR UNIT
Installing the indoor unit to installation board
(1) Pass the pipe through the hole
in the wall, and hook the upper
part of the indoor unit to the
installation board.
(2) Gently push the lower part to
fix the indoor unit base lower
latch to installation board.
(3) Install the latches of the bottom panel
(7 locations).
Secure the bottom panel with the 3 screws
(in the cap).
9. CONNECTING PIPING WORK
1. Preparation of connecting pipe
1.1. Selecting connecting pipe
Select connecting pipe according to the following table.
Model SRK20/25/35
Gas pipe ø9.52
Liquid pipe ø6.35
• Pipe wall thickness must be greater than or equal to 0.8 mm.
• Pipe material must be O-type (Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS
77.150.30).
1.2. Cutting connecting pipe
(1) Cut the connecting pipe to the required length with pipe cutter.
(2) Hold the pipe downward and remove the burrs. Make sure that no foreign material enters the pipe.
(3) Cover the connecting pipe ends with the tape.
2. Piping work
2.1. Flaring pipe
(1)
(2)
Flare dimensions for R32 are different from those for conventional refrigerant.
ment gauge.
A
Copper pipe
0
A
outer diameter
–0.4
ø6.35 9.1
ø9.52 13.2
ø12.7 16.6
2.2 Connecting pipes
(1) Connect pipes on both liquid and gas sides.
Service valve size (mm) Tightening torque (N·m)
ø6.35 (1/4")
ø9.52 (3/8")
ø12.7 (1/2")
CAUTION
•
•
leakage.
RLF012A202B_cc.indd 2
Cut out the panel smoothly along the
line in case of side or bottom piping.
Left
Right hand side piping
Piping in the right rear direction
Piping in the right direction
Odor from
the gutter
The gap to the ground The drain hose tip
Wavy
is 5 cm or less. is in the gutter.
Installation board
Indoor unit base latch
Wall
(2 locations)
Latch (7 locations)
Model SRK50/60
ø12.7
ø6.35
Rigid (clutch) type
Copper pipe
outer diameter
R32 or R410A Conventional
ø6.35
ø9.52 0-0.5
ø12.7
Liquid side
Gas side
14-18
34-42
(Do not turn)
49-61
can cause refrigerant leakage.
Forming of pipings
• Hold the bottom of the
before stretching it
and shaping it.
2. Drain change procedures
(1) Remove the screw and drain hose.
(2) Remove the drain cap by hand or pliers.
(3) Insert the drain cap which was removed at procedure (2) securely using a hexagonal wrench etc.
(4) Install the drain hose and screw securely.
(1 )
Screw
CAUTION
Incorrect installation of drain hose and cap can cause water leakage.
• Pour water to the drain pan located under the heat exchanger, and ensure that the water is discharged outdoor.
• When extended drain hose is present inside the room, insulate it securely with heat insulator available in the market.
Since this air-conditioner is designed to collect dew drops on the rear surface to the
drain pan, do not install the connecting wire above the gutter.
CAUTION
Incorrect drainage work can cause water leakage.
Indoor unit
Installation board
Bottom panel
3. Heating and condensation prevention
(1) Dress the connecting pipes (both liquid and gas pipes) with insulation to prevent it from heating and
dew condensation.
Use the heat insulating material which can withstand 120°C or higher temperature. Make sure that insu-
lation is wrapped tightly around the pipes and no gap is left between them.
(2) Wrap the refrigerant pipings of indoor unit with indoor unit heat insulation using tape.
(3)
sulation pad (standard accessory provided with indoor unit).
(4) Wrap the connecting pipes, connecting cable and drain hose with the tape.
(2)
Tape
NOTE
Locations where relative humidity exceeds 70%, both liquid and gas pipes need to be dressed with 20mm or
thicker heat insulation materials.
CAUTION
-
-
• Improper insulation can cause condensate(water) formation during cooling operation.
Condensate can leak or drip causing damage to household property.
• Poor heat insulating capacity can cause pipe outer surface to reach high temperature during heating
operation. It can cause cable deterioration and personal injury.
4. Finishing work
(1) Make sure that the exterior portion of connecting pipes, connecting cable and
1.0-1.5
drain hose is wrapped properly with tape. Shape the connecting pipes to match
with the contours of the pipe assembly route.
(2) Fix the pipe assembly with the wall using clamps and screws. Pipe assembly
should be anchored every 1.5m or less to isolate the vibration.
(3) Install the service cover securely. Water may enter the unit if service cover is
not installed properly, resulting in unit malfunction and failure.
WARNING
(only for R32)
•
must/shall be installed outdoors.
•
allowed indoors.
CAUTION
Make sure that the connecting pipes do not touch the components within the unit. If pipes touch the
internal components, it may generate abnormal sounds and/or vibrations.
54
- -
Pipings
Taping of the exterior
• Tape only the portion that
goes through the wall.
• Always tape the wiring
with the piping.
( 2) (3 )
Drain cap
Removing the indoor unit from installation board
(1) Remove the bottom panel. (Refer to 5.2)
(2) Pull the indoor unit base latch downward. (both right and left
hand sides). (The indoor unit base latch can be removed from the
installation board.)
(3) Push up the indoor unit upward so that it can be removed from
installation board.
Installation board
Indoor unit base latch
Wall
(2 locations)
(3) (4)
Connecting cable
Insulation pad
Liquid pipe
Position it so that the slit area faces upward.
Drain hose
Indoor
unit
Wall
'18 • SRK-T-234
( 4)
Gutter
Wall
Pipe space
Bottom panel
-
Gas pipe
Tape
Insulation
Pipe
assembly
(h)Screw
(h)Clamp
Wall hole cover
Seal hole with putty
Flared joint outside
for indoor unit
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