Toshiba RAS-3M23YACV-E, Service Manual

Page: 48 / 86

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9-3-10. Check and Test Operation
For R410A, use the leak detector exclusively
manufactured for HFC refrigerant (R410A,
R134a, etc.).
*
The conventional leak detector for HCFC refriger-
ant (R22, etc.) cannot be used because its sensi-
tivity for HFC refrigerant lowers to approx. 1/40.
• Pressure of R410A becomes approx. 1.6 times of
that of R22. If installation work is incompletely
finished, a gas leakage may occur in the cases
such as pressure
rise during operation. Therefore, be sure to test
the piping connections for leaking.
Fig. 9-3-15
Connecting
cable
Power cord
Earth line Earth line
10
10
L N
30
10
30
40
10
40
1 2 3
Fig. 9-3-16
• Check the flare nut connections, valve stem cap
connections and service port cap connections for
gas leak with a leak detector or soap water.
CAUTION
• Use a circuit breaker of a type that is not
tripped by shock waves.
• If incorrect/incomplete wiring is carried out, it
will cause an electrical fire or smoke.
• Prepare the power supply for exclusive use
with the air conditioner.
• This product can be connected to the mains.
Connection to fixed wiring :
A switch or circuit breaker which disconnects
all poles and has a contact separation of at
least 3 mm must be incorporate in the fixed
wiring.
An approved short circuit breaker or switches
must be used.
*
(A breaker having a sensitivity of approxi-
mately 0.1 second or less and a capacity of
approximately 30 mA is usually used.)
Three room (A + B + C) Multi
Fig. 9-3-14
CAUTION
• Wrong wiring connection may cause some
electrical parts burn out.
• Be sure to use the cord clamps specified
positions with attached to the product.
• Do not damage or scratch the conductive core
and inner insulator of power and inter-connect-
ing cables when peeling them.
• Be sure to comply with local cords on running
the wire from outdoor unit to indoor unit (size of
wire and wiring method etc.)
• Use the power cord and Inter-connecting cable
with specified thickness, specified type, and
protective devices specified.
Stripping length power cord and connecting cable
Terminal block
(Connecting cable)
Connecting cable
(A unit)
Connecting cable
(C unit)
Screw
Po wer cord Connecting cable
(B unit)
•
Flare nut connections
(Outdoor unit)
•
Valve stem cap connection
•
Service port cap connection
Flare nut connections
(Indoor unit)