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Installation procedures
b)Take below steps to test
1.For gas pipe and liquid pipe system,add pressure step by step(must charge
test
)
I the first step: apply pressure3.0kg/cm
II the second step:apply the pressure15.0kg/cm
leakage point;
III the third step:apply pressure28.0kg/cm
Notes:even if add pressure to 28.0kg/cm
found,so the third step,leave it at 28.0kg/cm
2.comfirm if pressure goes down
if pressure doesn't go down,
Meanwhile, when the temp. changes for 1degree, pressure will change 0.01MPa
point.
as well. Correct the pressure.
Vacuum dry
vacuum dry is utilize vacuum pump expelling
steamed gas which changed from water(liquid)
,to acheive pipe dry's purpose.at the same
time,inconcrete gas in system also be
expelled,easy for refrigerant charge.
(for example)when ambient temp.is 7.2
pressure low
-752mmHg can process
vacuum dry.please refer to right figure.
refrigerant charging
According to liquid pipe length to calculate refrigerant amount.adding refrigerant.
a)refrigerant fill amount when outdoor unit out of factory(5m is standard)
b)refrigerant refill amount is decided by liquid pipe's diameter and length.(liquid pipe is standard)
liquid pipe diameter(mm)
refrigerant recharge amount(g/m)
c)important:
1. calculate result must be listed(make a figure)
2. refrigerant pipe between indoor and outdoor unit excesses 5m,need recharge refrigerant additional.
3. after liquid pipe is dried,charge liquid refrigerant from close valve of liquid pipe side.
4.when refrigerant can't be charged completely,could utilize compressor's running to charge gas refrigerant
from gas pipe.
5. refrigerant charge quantity must use electronic weigh etc.
2
for more than 3 minites,it is possible to find leakage point;
2
for more than 3 minitues,it is possible to find
2
for about 24 hours;
2
,if the time is too short,little leakage point won't be
2
for 24h.(Attention:pressure mustn't over 28.0kg/cm
the test is passed.
.if pressure goes down,it need to find leakage
-60
-160
-260
-360
-460
-560
,
-700
-710
-720
-730
-740
-755
-760
6.35
9.52
30
65
28
0
-20
-10 0
10
20
Temperature( )
12.7
15.88
115
190
nitrogen to take a
760
700
600
500
400
300
200
60
50
40
necessary vacuum
degree
30
20
ambient temp. range
10
5
OmmHG
30
40
50
60 70
19.05
22.22
290
420
2
)
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