6 S4179705
1-7. Tubing Length
● Refrigerant tubing between the indoor and outdoor
units should be kept as short as possible.
● Select and decide the installation location so that
the length of the refrigerant tubing will be within the
limits given in Table 1-6.
Tubing length (L)
INDOOR
UNIT
OUTDOOR
UNIT
Elevation difference (H)
0711_M_I
Fig. 1-1
Table 1-6
Limit of elevation
difference between
the 2 units
Models
CH2432 CH3632
Tubing Data
Tubing size
Narrow tube in. (mm) 1/4 (6.35) 3/8 (9.52)
outer dia.
Wide tube in. (mm) 3/4 (19.05) 3/4 (19.05)
Limit of tubing length (ft.) 165 165
Outdoor unit is higher
165 165
than indoor unit (ft.)
Outdoor unit is lower
100 100
than indoor unit (ft.)
Max. allowable tubing length at shipment (ft.) 100 100
Required additional refrigerant (oz./ft.) 0.48
*1
0.53
*2
No additional charge of compressor oil is necessary.
*
1
If total tubing length becomes 100 to 165 ft., charge additional refrigerant (R22) by 0.48 oz./ft..
*
2
If total tubing length becomes 100 to 165 ft., charge additional refrigerant (R22) by 0.53 oz./ft..
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