Toshiba RAS-M10YKV-E Service Manual page 46

9-3-4. Optional Installation Parts
(Local Supply)
Parts name Q'ty
Refrigerant piping
Each
A Liquid side : ø6,35 mm
one
Gas side : ø9,52 mm or ø12,7 mm
Pipe insulating material
B
(polyethylene foam, 6 mm thick)
Each
C Putty, PVC tapes
one
9-3-5. Optional Installation Parts
(Separate Sold)
Parts name
Reducer (Ø12,7 → Ø9,52)
RB-M43RE
Expander (Ø9,52 → Ø12,7)
RB-M34EE
9-3-6. Refrigerant Piping Connection
CAUTION
KEEP IMPORTANT 4 POINTS FOR PIPING
WORK
1. Take away dust and moisture.
(Inside of the connecting pipes)
2. Tight connection (between pipes and unit)
3. Evacuate the air in the connecting pipes
using VACUUM PUMP.
4. Check gas leak. (connected points)
Flaring
1. Cut the pipe with a pipe cutter.
90˚
Obliquity Roughness Warp
Fig. 9-3-2
2. Insert a flare nut into the pipe, and flare the
pipe.
As the flaring sizes of R410A differ from those
of refrigerant R22, the flare tools newly
manufactured for R410A are recommended.
However, the
conventional tools can
be used by adjusting
projection margin of
the copper pipe.
Fig. 9-3-3
• Projection margin in flaring : B (Unit : mm)
Rigid (Clutch type)
Outer dia. R410A tool used Conventional tool used
of copper
R410A R22 R410A
pipe
~ ~
6,35 0 0,5 (Same as left) 1,0
~ ~
9,52 0 0,5 (Same as left) 1,0
1
~ ~
12,7 0 0,5 (Same as left) 1,0
Imperial (Wing nut type)
Outer dia. of
R410A
copper pipe
~
6,35 1,5 2,0
~
9,52 1,5 2,0
~
12,7 2,0 2,5
• Flaring size : A (Unit : mm)
+ 0
A
Outer dia. of – 0,4
copper pipe
R410A
6,35 9,1
9,52 13,2
12,7 16,6
In the case of flaring for R410A
*
with the conventional flare tool,
pull out it approx. 0,5 mm more
than that for R22 to adjust to the
specified flare size.
The copper pipe gauge is
useful for adjusting projection
margin size.
9-3-7. Installation
NOTE : For installation, at least 3 dimensions
should be kept free from obstacles (walls).
B
As shown in the figure, hang power cord
and connecting cable downward, and
take out it along piping connection port.
Fig. 9-3-5
Fixing bolt arrangement of outdoor unit
600
Suction side
R22 115
~
1,5 0,5 1,0
~
1,5 0,5 1,0
~
1,5 0,5 1,0
Diffuser
Fig. 9-3-6
• Secure the outdoor unit with the fixing bolts
R22
and nuts if the unit is likely to be exposed
~
to a strong wind.
1,0 1,5
~ • Use ø8 mm or ø10 mm anchor bolts and
1,0 1,5
nuts.
~
1,5 2,0
Drainage
R22
ø25
9,0
13,0
Bottom plate
16,2
Drain nipple
Fig. 9-3-7
• Install the provided drain nipple in the hole
of the bottom plate.
• Perform proper drainage processing using
a drain hose sold separately or one on the
Fig. 9-3-4
market. (Inner diameter : 16 mm)
• Do not use an ordinary hose on the market,
because it tends to get flat and as a result,
it prevents water from draining.
1. Piping connections to the outdoor unit should
be arranged in the sequence A, B, starting
from the bottom.
(For each piping connection, the gas pipe is
on the bottom and the liquid pipe is on the
top.)
2. When multiple indoor units are to be
connected to the outdoor unit, make the ends
of the pipes and wires from each indoor unit
to ensure that they will be connected to the
outdoor unit correctly.
(Problems caused by indoor units being
connected to the outdoor unit incorrectly are
very common in multiple-unit installations.)
3. The length and height difference of the
connecting pipes between the indoor and
outdoor units must be within the ranges
indicated below.
• Total piping length : Two room Multi (A + B)
= 30 m or less
• Minimum piping length : A or B
= 2 m or more
• Maximum indoor piping length :
A or B = 20 m or less
• Maximum piping height difference :
A or B = 10 m or less
• Maximum piping / height difference
Drain hole
between two rooms = 10 m or less
10 m
or less
Fig. 9-3-8
4. If the outdoor unit is to be mounred on a wall,
Drain hose sold
make sure that the platform supporting it is
separately or one
sufficiently strong.
on the market.
The platform should be designed and
manufactured to maintain its strength over a
long period of time, and sufficient consider-
ation should be given to ensuring that the
outdoor unit will not fall.
5. When the outdoor unit is to be mounted high
on a wall, take particular care to ensure that
parts do not fall installer is protected.
6. When doing installation work on level ground,
it is usual to wiring and piping connections to
the indoor units. And/then make to the outdoor
unit.
However if outdoor work is difficult it is
possible instead to make changes to the
procedure.
For example by making adjustments to the
wiring and piping length on the inside (rather
than the outside).
How to remove the valve cover
1. Remove a screw of the valve cover.
2. Pull the valve cover downward.
Fig. 9-3-9
A
Outdoor
unit
B
Valve
cover