12
■ Table 6 Indoor Unit Tubing Connection Size
Indoor unit type 22 28 36 45 56 60 73 90 106 112 140 160 180
*1
224
*1
280
*1
Distribution joint –
solenoid valve kit tubing
Suction tube ø15.88
ø19.05 ø22.22
Discharge tube ø12.70
ø15.88 ø19.05
Liquid tube ø9.52
Solenoid valve kit –
Indoor unit tubing
connection
Gas tube ø12.70 ø15.88
ø19.05 ø22.22
Liquid tube ø6.35 ø9.52
*1: For the solenoid valve kits, use CZ-P160HR3 with parallel specications. Branch the tubing before and after the solenoid valve kits.
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 7 Straight Equivalent Length of Joints
Gas tubing size (mm) 12.7 15.88 19.05 22.22 25.4 28.58 31.75 38.1 41.28
90° elbow 0.30 0.35 0.42 0.48 0.52 0.57 0.70 0.79 0.85
45° elbow 0.23 0.26 0.32 0.36 0.39 0.43 0.53 0.59 0.64
U-shape tube bent (R60-100 mm) 0.90 1.05 1.26 1.44 1.56 1.71 2.10 2.37 2.55
Trap bend 2.30 2.80 3.20 3.80 4.30 4.70 5.00 5.80 6.80
Y-branch distribution joint Equivalent length conversion not needed.
Ball valve for service Equivalent length conversion not needed.
Table 8 Refrigerant Tubing
Tubing size (mm)
Material Temper - O Material Temper - 1/2 H • H
ø6.35 t0.8 ø22.22 t1.0
ø9.52 t0.8 ø25.4 t1.0
ø12.7 t0.8 ø28.58 t1.0
ø15.88 t1.0 ø31.75 t1.1
ø19.05 t1.2 ø38.1 over t1.35
ø41.28 over t1.45
1-8. Additional Refrigerant Charge
Additional refrigerant charge amount is calculated below.
Required amount of additional refrigerant charge
= [ (Amount of additional refrigerant charge per meter of each size of liquid tube × its tube length) + (...) + (...)]
+ [(Necessary amount of additional refrigerant charge per outdoor unit) + (...) + (...)]
+ [(Necessary amount of additional refrigerant charge per meter of each size of discharge tube × its tube length) + (...) + (...)]
*Always charge accurately using a scale for weighing.
* If the existing tubing is used and the amount of on-site refrigerant charge exceeds the value listed below, change the size of the tubing
to reduce the amount of refrigerant.
Total amount of refrigerant for the system with 1 outdoor unit: 50 kg
Total amount of refrigerant for the system with 2 outdoor units: 80 kg
Total amount of refrigerant for the system with 3 outdoor units: 105 kg
Table 9 Necessary Amount of Additional Refrigerant Charge Per Meter, According to Liquid Tubing Size
Liquid tubing size (mm) 6.35 9.52 12.7 15.88 19.05 22.22
Amount of additional
refrigerant charge/m (g/m)
26 56 128 185 259 366
Table 10 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit
U-8MF3R7 U-10MF3R7 U-12MF3R7 U-14MF3R7 U-16MF3R7
1.0 kg 1.0 kg 3.9 kg 3.9 kg 3.9 kg
Table 11 Refrigerant Charge Amount at Shipment (for Outdoor Unit)
U-8MF3R7 U-10MF3R7 U-12MF3R7 U-14MF3R7 U-16MF3R7
9.8 kg 9.8 kg 11.8 kg 11.8 kg 11.8 kg
* 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.
Unit: mm
00_341136_2WAY_Eng.indb 12 2022/9/19 9:27:13
To Next Page
Loading...
