Carrier ClassiCOOL 53KDHT60N-518 Instruction Manual page 34

CONNECTING REFRIGERANT PIPING LINES
USE OF REFRIGERANT PIPING LINES
The following data refers to the use of refrigerant piping lines of diameters equivalent to that use in
units where : L = Maximum length of refrigerant piping lines between outdoor and indoor units.
H = Maximum vertical distance between outdoor and indoor units.
(A) OUTDOOR UNIT BELOW INDOOR UNIT :
Slop tubing towards the outdoor unit with a fall of at least (6mm) to (305mm).
Suction
Meters
line
L H
diameter
7/8"
40 15
( 22 mm )
(B) OUTDOOR UNIT ABOVE INDOOR UNIT :
 If height is less than or equal 4 meters, one oil trap must be at the suction line at the base of
suction riser near the Indoor unit to facilitate oil return to the compressor to ensure efficiency
of compressor mechanical parts.
If height is more than 4 meters, more than one oil trap must exist at the suction line, the first

one will be at the suction line near to the indoor unit and the following one will be 4 meters
from the first one and so on.
Suction
Meters
line
L H
diameter
7/8"
40 15
( 22 mm )
(C) OUTDOOR UNIT ON THE SAME LEVEL AS INDOOR UNIT:
An oil trap is preferred to be at the suction line at the base of suction riser near the Indoor unit
to facilitate oil return to the compressor to ensure efficiency of compressor mechanical parts.
Suction
Meters
line
L
diameter
7/8"
40
( 22 mm )
Liquid
line
diameter
1/2"
Indoor Unit
(12.7 mm)
Liquid
line
diameter
1/2"
(12.7 mm)
Indoor Unit
Liquid
line
diameter
1/2"
(12.7 mm)
Liquid
Line
Suction
Line
L
Indoor Unit
Oil trap
32
L
Suction
Line Outdoor Unit
Outdoor Unit
Liquid
Line
L
Liquid
Line
Suction
Line Outdoor Unit