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Example for Suction Pipe Selection:
Cellar Plus 70-S3, outdoor unit mounted above indoor unit with vertical riser 4.5m and horizontal pipe run 7.4m, the suction line
¾" OD is composed of 5pcs elbow 90
Read equivalent length from Table 7.
•
Elbow 90
long radius; 5 x 0.4 = 2.0m
0
•
Elbow 180
std radius; 1 x 1.0 = 1.0m
0
•
Total pipe run = 7.4 + 4.5 = 11.9m
Total equivalent length = 2.0 +1.0 +11.9 = 14.9m
Read from Table 6,
With total equivalent length 14.9m, the horizontal suction pipe selected based on column 20m, which is 7/8" OD to minimize the
capacity drop.
In this example, if the outdoor unit is installed above the indoor (this is the most severe condition for oil return especially at low
ambient and low room temperature). Suction riser must be selected based on column 10m, which is ¾" OD to ensure sufficient
gas velocity to return oil to compressor.
Note: If the outdoor unit installed below the indoor unit, the vertical pipe size follows the size of the horizontal pipe.
Table 7: Equivalent Length for Fittings and Valve (in meter)
Smooth Elbows
90
0
90
Std
Nominal
Radius
Pipe or
Tube Size
(inch)
3/8
0.4
1/2
0.4
5/8
0.5
3/4
0.5
7/8
0.6
1 1/8
0.8
1 3/8
1.0
Expansion Valve
•
All evaporator models are pre-fitted with expansion
valve TE2-02 in the piping, except JCC2-80EV which is
supplied with two sizes of orifice as standard. Orifice
size -03 is installed in the piping, and the orifice size -
04 was supplied loose (packed in a polybag tagged
to the expansion valve body).
•
The capillary tube label, which is in green color
fastened around the capillary of expansion valve
indicates the pre-fit orifice size (Example: Figure 8
indicates orifice size (04).
Figure 8: Capillary Tube Label
•
Refer Table 6 to change the orifice size in JCC2-80EV
to match the coupled condensing unit. Follow Figure 9
to install the orifice.
•
Installer is recommended to change the capillary tube
label accordingly if orifice had been changed.
Issue: 01.06.2023
0
long radius and 1pcs 180
0
Long
0
0
45
Std
180
Std
0.3
0.2
0.7
0.3
0.2
0.7
0.3
0.2
0.8
0.3
0.2
0.8
0.4
0.3
1.0
0.5
0.4
1.2
0.7
0.5
1.7
0
std radius.
Smooth Bend Tee Connections
Flow
Straight Through Flow
Through
No
Reduced
Branch
Reduction
0.8
0.3
0.8
0.3
0.9
0.3
0.9
0.3
1.2
0.4
1.5
0.5
2.1
0.7
•
Incorrect positioning of the sensing bulb will lead to the
malfunctioning of the expansion valve. Refer Figure 10
for the correct sensing bulb orientation to suit different
pipe diameters.
•
Never mount the sensing bulb on the bottom side of
the horizontal piping due to oil returning to the
compressor may give false signal to the expansion
valve.
•
It is recommended to mount the sensing bulb on the
horizontal pipe. If mount the sensing bulb at vertical
pipe, the capillary tube must be pointing upwards to
avoid malfunctioning of the expansion valve.
•
Make sure the sensing bulb is far from the brazing or
remove the sensing bulb before brazing.
Reduced
Globe or
25%
50%
Solenoid
Valve
0.4
0.4
0.4
0.4
0.4
0.5
0.4
0.5
0.6
0.6
0.7
0.8
0.9
1.0
Gate
Valve
5.2
0.2
5.2
0.2
5.5
0.2
5.5
0.2
6.7
0.3
8.8
0.3
12
0.5
Page 7
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