Functions To Be Implemented Locally - Toshiba rav-sm1103at-e Installation Manual

12

FUNCTIONS TO BE IMPLEMENTED LOCALLY

Handling Existing Pipe
When using the existing pipe, carefully check for the following:
• Wall thickness (within the specified range)
• Scratches and dents
• Water, oil, dirt, or dust in the pipe
• Flare looseness and leakage from welds
• Deterioration of copper pipe and heat insulator
Cautions for using existing pipe
• Do not reuse a flare nut to prevent gas leaks.
Replace it with the supplied flare nut and then process it to a flare.
• Blow nitrogen gas or use an appropriate means to keep the inside of the pipe clean. If discolored oil or much
residue is discharged, wash the pipe.
• Check welds, if any, on the pipe for gas leaks.
When the pipe corresponds to any of the following, do not use it. Install a new pipe instead.
• The pipe has been opened (disconnected from indoor unit or outdoor unit) for a long period.
• The pipe has been connected to an outdoor unit that does not use refrigerant R22, R410A or R407C.
• The existing pipe must have a wall thickness equal to or larger than the following thicknesses.
Reference outside
Wall thickness (mm)
diameter (mm)
Ø9.5 0.8
Ø15.9 1.0
Ø19.0 1.0
• Do not use any pipe with a wall thickness less than these thicknesses due to insufficient pressure capacity.
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Refrigerant Recovery
• When recovering refrigerant during reinstallation of the indoor or outdoor unit, etc., use the refrigerant recovery
switch SW802 on the cycle control P.C. board of the outdoor unit.
Work procedure
1. Turn on the power supply.
2. Using the remote controller, set the indoor unit to FAN operation.
3. Push the refrigerant recovery switch SW802 on the cycle control P.C. board of the outdoor unit, after which the
forced cooling operation will begin (Max. 10 minutes). Recover refrigerant by handling the valve.
4. After recovering the refrigerant, push the refrigerant recovery switch SW802 while closing the valve.
The operation will stop.
5. Turn off the power supply.
Existing pipe switch SW801
Only when the existing Ø19 mm gas pipe is used
on an RAV-SM1403AT-E model unit, change the
setting of SW801 No. 5.
Refrigerant recovery switch SW802
L
N
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
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