Toshiba RAS-10YKV-E Service Manual page 39

9-3. Outdoor Unit
9-3-1. Installation Place
• A place which provides the spaces around the
outdoor unit as shown in the left diagram.
• A place which can bear the weight of the
outdoor unit and does not allow an increase in
noise level and vibration.
• A place where the operation noise and
discharged air do not disturb your neighbors.
• A place which is not exposed to a strong wind.
• A place free of a leakage of combustible gases.
• A place which does not block a passage.
• When the outdoor unit is to be installed in an
elevated position, be sure to secure its feet.
• An allowable length of the connecting pipe is up 15m.
• An allowable height level is up to 10 m.
• A place where the drain water does not raise
any problem.
CAUTION
1. Install the outdoor unit without anything
blocking the air discharging.
2. When the outdoor unit is installed in a place
exposed always to a strong wind like a coast or
on a high story of a building, secure the normal
fan operation using a duct or a wind shield.
3. Specially in windy area, install the unit to
prevent the admission of wind.
4. Installation in the following places may result
trouble. Do not install the unit such places.
• A place full of machine oil.
• A saline-place such as coast.
• A place full of sulfide gas.
• A place where high-frequency waves are
likely to be generated
as from audio
equipment,
welders, and
medical
equipment.
9-3-2. Refrigerant Piping Connection
Flaring 1. Cut the pipe with a pipe cutter.
90˚
Obliquity Roughness
2. Insert a flare nut into the pipe, and flare the pipe.
• Projection margin in flaring : A (Unit : mm)
Rigid (Clutch type)
Outer dia. of R410A
copper pipe tool used
6,35 0 to 0,5
9,52 0 to 0,5
12,7 0 to 0,5
Imperial (Wing nut type)
A
Outer dia. of
copper pipe
6,35
Die Pipe
9,52
12,7
Fig. 9-3-3
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Tightening Connection
Align the centers of the connecting pipes and tighten the
flare nut as far as possible with your fingers Then
tighten the nut with a spanner and torque wrench as
shown in the figure.
CAUTION
• Do not apply excess torque. Otherwise, the nut
may crack depending on the conditions.
Outer dia. of copper pipe
ø6,35 mm
ø9,52 mm
ø12,7 mm
• Tightening torque of flare pipe connections
Pressure of R410A becomes higher than that of R22.
(Approx. 1,6 times) Therefore, using a torque wrench,
tighten firmly the flare pipe connecting sections which
connect the indoor and outdoor units
up to the specified tightening torque.
Incorrect connections may cause not
only a gas leakage, but also a trouble
of the refrigeration cycle.
Half union Flare nut
Externally
threaded side
Use a wrench Use a torque wrench
to secure. to secure.
9-3-3. Evacuating
After the piping has been connected to all indoor unit(s),
you can perform the air purge together at once.
AIR PURGE
Evacuate the air in the connecting pipes and in the
indoor unit using vacuum pump. Do not use the
refrigerant in the outdoor unit. For details, see the
manual of vacuum pump.
Use a vacuum pump
Strong Be sure to use a vacuum pump with counter-flow
wind
prevention function so that inside oil of the pump does not
flow backward into pipes of the air conditioner when the
Fig. 9-3-1
pump stops. (If inside oil of the vacuum pump enters into
the air conditioner which adopts R410A, a trouble of the
refrigeration cycle may be caused.)
1. Connect the charge hose from the manifold valve to the
service port of the gas side packed valve.
2. Connect the charge hose to the port of vacuum pump.
3. Open fully the low pressure side handle of the gauge
Warp
manifold valve.
4. Operate the vacuum pump to start for evacuating.
Fig. 9-3-2
Perform evacuating for about 15 minutes if the piping
length is 20 meters. (15 minutes for 20 meters)
(assuming a pump capacity of 27 liters per minute.)
Then confirm that the compound pressure gauge
reading is –101 kPa ( –76 cmHg).
Conventional
5. Close the low pressure side
tool used
valve handle of gauge manifold.
1,0 to 1,5
6. Open fully the valve stem of
1,0 to 1,5
the packed valves (both side
1,0 to 1,5 of Gas and Liquid).
7. Remove the charging hose
from the service port.
8. Securely tighten the caps
R410A
on the packed valves.
1,5 to 2,0
1,5 to 2,0
2,0 to 2,5
Fig. 9-3-6
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)
(Unit : N·m)
Packed Valve Handling Precautions
Tightening torque
• Open the valve stem all the way out; but do not try
14 to 18 (1,4 to 1,8 kgf•m)
to open it beyond the stopper.
33 to 42 (3,3 to 4,2 kgf•m)
• Securely tighten the valve stem cap with torque in
50 to 62 (5,0 to 6,2 kgf•m)
the following table :
Gas side 50 to 62 N•m
(ø12,7 mm) (5,0 to 6,2 kgf•m)
Gas side 33 to 42 N•m
(ø9,52 mm) (3,3 to 4,2 kgf•m)
Flare at
Liquid side 14 to 18 N•m
indoor
unit side
(ø6,35 mm) (1,4 to 1,8 kgf•m)
14 to 18 N•m
Service port
(1,4 to 1,8 kgf•m)
9-3-4. Wiring Connection
Internally Flare at
outdoor
threaded side 1. Remove the electric parts cover from the outdoor
unit side
unit.
Fig. 9-3-4
2. Connect the connecting cable to the terminal as
Fig. 9-3-5
identified with their respective matched numbers
on the terminal block of indoor and outdoor unit.
3. When connecting the connecting cable to the
outdoor unit terminal, make a loop as shown
installation diagram of indoor and outdoor unit, to
prevent water coming in the outdoor unit.
4. Insulate the unused cords (conductors) with water
coming in the outdoor unit. Process them so that
they do not touch any electrical or metal parts.
Stripping length of connecting cable
Terminal block (Connecting cable)
Connecting
cable
Model
Power source
Maximum running current
Plug socket & fuse rating
Power cord
Compound
CAUTION
Pressure gauge
pressure
gauge
-101kPa
• Wrong wiring connection may cause some
Manifold valve
(-76cmHg)
Handle Hi electrical parts burn out.
Handle Lo
(Keep full closed)
Charge hose Charge hose • Be sure to comply with local codes on running
(For R410A only) (For R410A only)
the wire from outdoor unit to indoor unit (size of
Vacuum pump
adapter for
wire and wiring method etc.)
counter-flow
Connecting
prevention
pipe
(For R410A only)
• Every wire must be connected firmly.
Vacuum
pump NOTE : Connecting cable
Packed valve at liquid side
• Wire type : More than H07RN-F or 245IEC66
Packed valve at gas side
Service port
(2,0mm² or more)
(Valve core (Setting pin))
9-3-5. Gas Leak Test
• Check the flare nut connections, valve
stem cap connections and service port cap
Hexagonal
connections for gas leak with a leak
wrench is
required. detector or soap water.
9-3-6. Test Operation
To switch the TEST RUN (COOL) mode,
press TEMPORARY button for 10 sec.
(The beeper will make a short beep.)
Fig. 9-3-7
9-3-7. Auto Restart Setting
L N 10 1 2 3 10
10 10
This product is designed so that, after a
power failure, it can restart automatically in
40 40
30 30
the same operating mode as before the
power failure,
Earth line
Power Power
cord cord
Connecting cable
Fig. 9-3-8
Information
RAS-10YKV-E/RAS-13YKV-E
The product was shipped with Auto
50/60 Hz, 220 – 240 V Single phase
Restart function in the off position.
8,5A
Turn it on as required.
10A
H07RN-F or 245IEC66 (2,0mm² or more)
How to Set the Auto Restart
• Press and hold down the TEMPORARY
button for about 3 seconds. After 3
seconds, the electronic beeper makes
three short beeps to tell you the Auto
Restart has been selected.
• To cancel the Auto Restart, follow the
steps described in the section Auto Restart
Function of the Owner's Manual.
Flare nut connections
(Indoor unit)
• Flare nut connections
(Outdoor unit)
• Valve stem cap connection
• Service port cap connection
Fig. 9-3-9
TEMPORARY
button
TEMPORARY
Fig. 9-3-10