YMGI VRFO-72VP-U2C(55)5, Инструкции по установке и Руководство пользователя

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Your Modern Green Idea
37
Air Purging and Refrigerant Charge
Air purging
Confirm outdoor liquid and gas valves are closed. Air purge from the nozzle located on liquid and gas
valves by vacuum pump. See Fig.36.
When there are more than 2 outdoor units, air purging from the nozzle located on the oil balance valve.
Confirm outdoor oil balance valves are closed. See Fig.37.
Fig. 36 Fig. 37
Additional refrigerant charging
Outdoor unit has been charged with refrigerant before delivery.
Charge additional refrigerant for field-installed connecting pipe. If the pipeline is longer than 1m (39-3/8in.), please refer
to the following table for charging amount of refrigerant. (Liquid pipe prevails)
How much additional refrigerant should be charged.
Total refrigerant charging amount R= Pipeline charging amount A + Σcharging amount B of every module.
1. Pipeline charging amount
Added refrigerant quantity A for piping = ΣLiquid pipe length × Added refrigerant quantity for each meter (in.) of
liquid pipe.
Diameter of liquid pipe mm(in.)
28.6
(1-1/8)
25.4
(1)
22.2
(7/8)
19.05
(3/4)
15.9
(5/8)
12.7
(1/2)
9.52
(3/8)
6.35
(1/4)
kg/m 0.680 0.520 0.350 0.250 0.170 0.110 0.054 0.022
OZ/in. 0.61 0.47 0.31 0.22 0.15 0.10 0.05 0.02
2.
ΣRefrigerant charging amount B of every module.
Refrigerant charging amount B of every
module kg(Pounds)
Rated Capacity(1000Btu/h)
IDU/ODU rated
capacity collocation
ratio C
Quantity of included
IDUs(N)
72 96 120
50%≤C≤90%
N
＜
4 0 0 0
N
≥4
0.5(1.1) 0.5(1.1) 0.5(1.1)
90%
＜
C≤105%
N
＜
4
1(2.2) 1(2.2) 1.5(3.3)
8
＞
N≥4
2(4.4) 2(4.4) 3(6.6)
N
≥8
4(8.8) 3.5(7.7) 4(8.8)
105%
＜
C≤135%
N
＜
4 2(4.4) 2(4.4) 2.5(5.5)
8
＞
N≥4
4(8.8) 3.5(7.7) 4(8.8)
N
≥8
4.5(9.9) 4.5(9.9) 5(11.0)