Panasonic U-120ME2U9, Руководство по установке

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1-7. Straight Equivalent Length of Joints
Design the tubing system by referring to the following table for the straight equivalent length of joints.
Table 1-8 Straight Equivalent Length of Joints
Unit: ft. (m)
Gas tubing size (in. (mm))
1/2"
(12.7)
5/8"
(15.88)
3/4"
(19.05)
7/8"
(22.22)
1-1/8"
(28.58)
1-3/8"
(34.92)
1-5/8"
(41.28)
90° elbow
1
(0.30)
1.1
(0.35)
1.4
(0.42)
1.6
(0.48)
1.9
(0.57)
2.5
(0.76)
2.8
(0.85)
45° elbow
0.8
(0.23)
0.9
(0.26)
1
(0.32)
1.2
(0.36)
1.4
(0.43)
1.8
(0.55)
2.0
(0.61)
U-shape tube bent (R2-3/8" – 4" (60 – 100mm))
3
(0.90)
3.4
(1.05)
4.1
(1.26)
4.7
(1.44)
5.6
(1.71)
7.4
(2.26)
8.4
(2.56)
Trap bend
7.5
(2.30)
9.2
(2.80)
10.5
(3.20)
12.5
(3.80)
15.4
(4.70)
19.2
(5.85)
22.3
(6.80)
Y-branch distribution joint Equivalent length conversion not needed.
Ball valve for service Equivalent length conversion not needed.
Table 1-9 Refrigerant tubing (Existing tubing can be used.)
Tubing size (in. (mm))
* When bending the tubes, use a
bending radius that is at least 4 times
the outer diameter of the tubes.
In addition, take sufficient care to
avoid crushing or damaging the tubes
when bending them.
Material: O Material: O Material: O
Outer diameter Wall thickness Outer diameter Wall thickness Outer diameter Wall thickness
1/4" (6.35) 0.025 (0.635) 5/8" (15.88) 0.040 (1.016) 1-1/8" (28.58) 0.050 (1.27)
3/8" (9.52) 0.030 (0.762) 3/4" (19.05) 0.042 (1.0668) 1-3/8" (34.92) 0.055 (1.397)
1/2" (12.7) 0.035 (0.889) 7/8" (22.22) 0.045 (1.143) 1-5/8" (41.28) 0.060 (1.524)
1-8. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated from the liquid tubing total length, combination number of outdoor unit and
refrigerant amount according to all indoor unit cooling capacity.
Required amount of additional refrigerant charge
= [(Necessary amount of additional refrigerant charge per ft. (m) of each size of liquid tube x its tube length) + (...) + (...)]
+ [Necessary amount of additional refrigerant charge per outdoor unit]
+ [Necessary amount of additional refrigerant charge for all indoor unit cooling capacity]
* Always charge accurately using a scale for weighing.
Table 1-10-1 Necessary Amount of Additional Refrigerant Charge Per ft. (or per meter), According to Liquid Tubing Size
Liquid tubing size
inch ø1/4" ø3/8" ø1/2" ø5/8" ø3/4" ø7/8"
(mm) (ø6.35) (ø9.52) (ø12.7) (ø15.88) (ø19.05) (ø22.22)
Additional amount
oz/ft. 0.279 0.602 1.38 1.99 2.78 3.93
(
g
/m) (26) (56) (128) (185) (259) (366)
Table 1-10-2 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit
Further charge a certain amount listed below in addition to the amount of refrigerant charge.
Combination number of outdoor unit 1 2 3
Additional amount oz (
g
) 70.5 (2,000) 141.0 (4,000) 212 (6,000)
Necessary Amount of Additional Refrigerant Charge for All Indoor Unit Cooling Capacity
Charge a refrigerant amount calculated in the following formula according to the total amount of indoor unit cooling capacity.
Additional refrigerant amount when cooling capacity is BTU/h = Cooling capacity (BTU/h) x 1.034 x 0.001 + 10.6 (oz)
or Additional refrigerant amount when cooling capacity is kW = Cooling capacity (kW) x 1000 x 0.1 + 300 (
g
)
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