Carrier 53QPCT18H-708F Installation Manual page 29

CONNECTING REFRIGERANT PIPING LINES (Cont.)
16.3 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).
Meters
Model
L H
53QPCT18 20 10
53QPCT24 20 10
Outdoor Unit
18K
(B)
OUTDOOR UNIT ABOVE INDOOR UNIT :
• If height is less than or equal 4 meters, one oil trap must be at the gas line at the base of gas
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 gas line, the first one
•
will be at the gas line near to the indoor unit and the following one will be 4 meters from the
first one and so on.
Outdoor Unit
Meters
Model
L H
53QPCT18 20 10
53QPCT24 20 10
(C)
OUTDOOR UNIT ON THE SAME LEVEL AS INDOOR UNIT:
An oil trap is preferred to be at the gas line at the base of gas riser near the Indoor unit to
facilitate oil return to the compressor to ensure efficiency of compressor mechanical parts.
Meters
Model
L
53QPCT18 20
53QPCT24 20
Indoor Unit
18K
18K
Outdoor Unit
18K
Indoor Unit
24K
Indoor Unit
24K
Indoor Unit
Indoor Unit
24K
18K
Liquid
Gas
Oil trap
Liquid
L
Gas
Oil Trap
27
Outdoor Unit
24K
Outdoor Unit
24K
Indoor Unit
18K
Outdoor Unit
24K