J&M CellarPlus 70-S1/S3, Техническое руководство

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Issue: 01.06.2023 Page 7
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 0 long radius and 1pcs 180 0 std radius.
Read equivalent length from
Table 7 .
•
Elbow 90
0
long radius; 5 x 0.4 = 2.0m
•
Elbow 180 0 std radius; 1 x 1.0 = 1.0m
•
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)
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.
•
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.
No
Reduction
Reduced
25%
Reduced
50%
3/8 0.4 0.3 0.2 0.7 0.8 0.3 0.4 0.4 5.2 0.2
1/2 0.4 0.3 0.2 0.7 0.8 0.3 0.4 0.4 5.2 0.2
5/8 0.5 0.3 0.2 0.8 0.9 0.3 0.4 0.5 5.5 0.2
3/4 0.5 0.3 0.2 0.8 0.9 0.3 0.4 0.5 5.5 0.2
7/8 0.6 0.4 0.3 1.0 1.2 0.4 0.6 0.6 6.7 0.3
1 1/8 0.8 0.5 0.4 1.2 1.5 0.5 0.7 0.8 8.8 0.3
1 3/8 1.0 0.7 0.5 1.7 2.1 0.7 0.9 1.0 12 0.5
Straight Through Flow
Smooth Bend Tee Connections
Nominal
Pipe or
Tube Size
(inch)
Globe or
Solenoid
Valve
Gate
Valve
Smooth Elbows
90
0
Std
90
0
Long
Radius
45
0
Std 180
0
Std
Flow
Through
Branch