Refrigerant Piping Connection; Evacuating; Wiring Connection - Toshiba Ras-107 Installationsanleitung

Refrigerant Piping Connection

Flaring
1. Cut the pipe with a pipe cutter.
2. Insert a fl are nut into the pipe and fl are the pipe.
• Projection margin in fl aring : A (Unit : mm)
Rigid (clutch type)
Outer dia.
of copper pipe
6.35
9.52
12.70
Die
Tightening connection
Align the centers of the connecting pipes and tighten the fl are nut as far as pos-
sible with your fi ngers. Then tighten the nut with a spanner and torque wrench
as shown in the fi gure.
Use a wrench to secure.
CAUTION
Do not apply excess torque. Otherwise, the nut may crack depending on
the conditions.
Outer dia. of copper pipe
• Tightening torque of fl are pipe connections
The operating pressure of R410A
is higher than that of R22 (approx.
1.6 times). It is therefore necessary
to fi rmly tighten the fl are pipe
connecting sections (which connect
the indoor and outdoor units) up to the
specifi ed tightening torque. Incorrect
connections may cause not only a
gas leakage, but also damage to the
refrigeration cycle.
Shaping pipes
1. How to shape the pipes
Shape the pipes along the incused line on
the outdoor unit.
2. How to fi t position of the pipes
Put the edges of the pipes to the place with
a distance of 85 mm from the incused line.
After the piping has been connected to the indoor unit, you can perform the
air purge together at once.
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Obliquity Roughness
90
R410A tool used
0 to 0.5
0 to 0.5
0 to 0.5
Imperial (wing nut type)
A
Outer dia. of copper pipe
6.35
9.52
Pipe
12.70
Half union Flare nut
Externally Internally
threaded side threaded side
Use a torque wrench to tighten.
Tightening torque
Ø6.35 mm 16 to 18 (1.6 to 1.8 kgf·m)
Ø9.52 mm 30 to 42 (3.0 to 4.2 kgf·m)
Ø12.70 mm 50 to 62 (5.0 to 6.2 kgf·m)

Evacuating

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AIR PURGE
Evacuate the air in the connecting pipes and in the indoor unit using a
vacuum pump. Do not use the refrigerant in the outdoor unit. For details,
see the manual of the vacuum pump.
Using a vacuum pump
Be sure to use a vacuum pump with counter-fl ow prevention function so that
Warp
inside oil of the pump does not fl ow backward into pipes of the air conditioner
when the pump stops.
(If oil inside of the vacuum pump enters the air conditioner, which use R410A,
refrigeration cycle trouble may result.)
1. Connect the charge hose from the manifold valve to the service port of the
packed valve at gas side.
2. Connect the charge hose to the port of the vacuum pump.
3. Open fully the low pressure side handle of the gauge manifold valve.
Conventional tool
4. Operate the vacuum pump to start evacuating. Perform evacuating for
used
about 15 minutes if the piping length is 20 meters. (15 minutes for 20 meters)
1.0 to 1.5
(assuming a pump capacity of 27 liters per minute) Then confi rm that the
1.0 to 1.5
compound pressure gauge reading is –101 kPa (–76 cmHg).
1.0 to 1.5 5. Close the low pressure side valve handle of the gauge manifold valve.
6. Open fully the valve stem of the packed valves (both gas and liquid sides).
7. Remove the charging hose from the service port.
8. Securely tighten the caps on the packed valves.
R410A
1.5 to 2.0
1.5 to 2.0
2.0 to 2.5
CAUTION
(Unit : N·m)
• KEEP IMPORTANT 5 POINTS FOR PIPING WORK.
(1) Take away dust and moisture (inside of the connecting pipes).
(2) Tighten the connections (between pipes and unit).
(3) Evacuate the air in the connecting pipes using a VACUUM PUMP.
(4) Check gas leak (connected points).
(5) Be sure to fully open the packed valves before operation.
Packed valve handling precautions
Flare at
indoor unit side
• Open the valve stem all the way out, but do not try to open it beyond the
stopper.
• Securely tighten the valve stem cap with torque in the following table:
Gas side
(Ø12.70 mm)
Gas side
Flare at
(Ø9.52 mm)
outdoor unit side
Liquid side
(Ø6.35 mm)
Service port
Incused line
1. Remove the valve cover from the outdoor unit.
2. Connect the connecting cable to the terminals as identifi ed with their
respective matched numbers on the terminal block of indoor and outdoor
unit.
3. When connecting the connecting cable to the outdoor unit terminals, make
a loop as shown in the installation diagram of indoor and outdoor unit to
prevent water coming in the outdoor unit.
4. Insulate the unused cords (conductors) from any water coming in the
outdoor unit. Proceed them so that they do not touch any electrical or metal
parts.
6
Pressure gauge
Compound pressure gauge
–101 kPa
(–76 cmHg)
Manifold valve
Handle Hi
Handle Lo
(Keep full closed)
Charge hose
(For R410A only)
Charge hose
(For R410A only)
Connecting pipe
Vacuum pump adapter for
counter-fl ow prevention
(For R410A only)
Vacuum
pump
Packed valve at gas side
Service port (Valve core (Setting pin))
Packed valve at liquid side
50 to 62 N·m
(5.0 to 6.2 kgf·m)
30 to 42 N·m
(3.0 to 4.2 kgf·m)
16 to 18 N·m
(1.6 to 1.8 kgf·m)
9 to 10 N·m
(0.9 to 1.0 kgf·m)

Wiring Connection

EN
ES
FR
IT
DE
PT
PL
CZ
RU
CR
HU
TR
NL
GR
SV
FI
NO
The hexagon wrench
is required.
DK
RO
BG
EE
LV
SK
SI
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