Refrigerant Piping - Toshiba RAV-M242A-E Service Manual

5-1. Refrigerant Piping

5-1-1. Permissible Piping Length and Head
The minimum inter-unit refrigerant piping length shall
be 2m.
Limit the number of bends in the refrigerant piping to
10 or less.
Model
RAS-13SK-E
(or RAS-13SKX)
5-1-2. Piping Material and Sizes
Table 5-2
Piping material
Phosphate deoxi-
dized copper
seamless pipes for
air conditioners
5-1-3. Air Purging
• Subject the refrigerant tube of outdoor and indoor
units to air purge with a vacuum pump.
• Do not carry out this air purge by using the refrig-
erant filled in the outdoor unit.
• To handle valves, a 5mm hexagon wrench is
needed.
Connectable indoor
unit number
2
Piping size (mm)
Model
Larger
RAS-
13SK-E
12,7
(or RAS-
13SKX)
Table 5-1
Permissible piping
length ( 1, 2)
15m
5-1-4. Refrigerant Pipe Connecting Position
Smaller
6,4
5-1-5. Additional Refrigerant Quantities
RAV-M242A-E
(or RAV-M242A)
– 8 –
Unit A
RAS-13SK-E
(or RAS-13SKX)
2
Fig. 5-1
Permissible piping
head (H)
5m
Fig. 5-2
Table 5-3
Model Addition per meter
Unit B
RAS-13SK-E
(or RAS-13SKX)
Remarks
Fig. 5-1
Unit B
Unit A
No need