26
L
CONNECTING REFRIGERANT PIPING LINES (Cont.)
15.2 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 unit.
H = Maximum vertical distance between outdoor and indoor units.
(A)
OUTDOOR UNIT BELOW INDOOR UNIT:
a. Suction line should rise above height of Indoor unit to shape a liquid trap in an inverted
loop before descending to outdoor unit to prevent liquid refrigerant from draining into
compressor during shutdown.
b. Slop tubing towards the outdoor unit with a fall of at least (6mm) to (305mm).
(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.
(C)
OUTDOOR UNIT ON THE SAME LEVEL AS INDOOR UNIT:
An oil trap shall 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.
Meters
System
Model
L
H
53QG18
20 10
53QG24
20 10
Liquid Trap
Suction Line
Outdoor
Unit
Meters
System
Model
L
H
53QG18
20 10
53QG24
20 10
Meters
System
Model
L
53QG18
20
53QG24
20
Outdoor
Unit
Indoor Unit
Slop
Oil Trap
Liquid
Suction
Indoor
Unit
H
Max.
4m
Liquid Line
Slop
H
Outdoor
Unit
Indoor Unit
Oil Trap
Liquid
Suction
Summary of Contents for 42QG18-C
Page 1: ...0 2009 ...
