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SM830082
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1. Specifications
● 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 1-10.
Tubing length (L)
INDOOR
UNIT
OUTDOOR
UNIT
Elevation difference (H)
0711_M_I
Fig. 1-1
Table 1-10
Models
CH2442
CH3642,
CH4242
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..
Limit of elevation
difference between
the 2 units
1-13 Installation Instructions