Table of Contents
Advertisement
20
Header
Models
Gas pipe
360(14-5/32)
120(4-23/32)
ID12.7(1/2)
4 branch
ID12.7(1/2)
ID15.88(5/8)
ID15.88(5/8)
ARBL054
ID19.05(3/4)
ID15.88(5/8)
540(21-1/4)
120(4-23/32)
7 branch
ID12.7(1/2)
ID15.88(5/8)
ID15.88(5/8)
ARBL057
ID19.05(3/4)
ID12.7(1/2)
ID12.7(1/2)
400(15-23/32)
ID12.7(1/2)
ID12.7(1/2)
160(6-5/16)
ID12.7(1/2)
ID12.7(1/2)
ID15.88(5/8)
ID15.88(5/8)
ID12.7(1/2)
ID15.88(5/8)
ID12.7(1/2)
ID12.7(1/2)
ID12.7(1/2)
4 branch
ID15.88(5/8)
ID15.88(5/8)
ID12.7(1/2)
ID12.7(1/2)
ID15.88(5/8)
ID15.88(5/8)
120
ID19.05(3/4)
ID12.7(1/2)
ID12.7(1/2)
ID15.88(5/8)
ID15.88(5/8)
ID15.88(5/8)
ID15.88(5/8)
(4-23/32)
ARBL104
ID15.88(5/8)
ID15.88(5/8)
ID15.88(5/8)
ID15.88(5/8)
ID28.58(1-1/8) ID25.4(1)
ID22.2(7/8)
580(22-27/32)
160(6-5/16)
7 branch
ID12.7(1/2)
ID19.05(3/4)
ID15.88(5/8)
ARBL107
ID28.58(1-1/8) ID25.4(1)
760(29-28/32)
160(6-5/16)
10 branch
ID12.7(1/2)
ID19.05(3/4)
ID15.88(5/8)
ARBL1010
ID28.58(1-1/8) ID25.4(1)
775(30-17/32)
182(7-5/32)
10 branch
ID12.7(1/2)
ID19.05(3/4)
ID15.88(5/8)
ARBL2010
ID28.58(1-1/8) ID25.4(1)
Leak Test and Vacuum drying
Leak test
Leak test should be made by pressurizing nitrogen gas to 3.8
MPa(551.1psi). If the pressure does not drop for 24 hours, the system
passes the test. If the pressure drops, check where the nitrogen leaks.
For the test method, refer to the following figure. (Make a test with
the service valves closed. Be also sure to pressurize liquid pipe, gas
pipe and high/low pressure common pipe)
The test result can be judged good if the pressure has not be reduced
after leaving for about one day after completion of nitrogen gas pres-
surization.
Outdoor unit
Close
Nitrogen gas
Close
cylinder
Close
Nitrogen gas
cylinder
[Unit:mm(inch)]
Liquid pipe
360(14-5/32)
120(4-23/32)
ID6.35(1/4)
ID6.35(1/4)
150
120
ID9.52(3/8)
120
(5-29/32)
ID9.52(3/8)
(4-23/32)
(4-23/32)
ID12.7(1/2)
ID9.52(3/8)
540(21-1/4)
120(4-23/32)
ID12.7(1/2)
150
120
ID9.52(3/8)
(5-29/32)
(4-23/32)
ID12.7(1/2)
ID15.88(5/8)
ID6.35(1/4)
ID6.35(1/4)
360(14-5/32)
ID6.35(1/4)
ID6.35(1/4)
120(4-23/32)
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID9.52(3/8)
ID6.35(1/4)
ID6.35(1/4)
ID6.35(1/4)
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID9.52(3/8)
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID9.52(3/8)
150
ID9.52(3/8)
120
ID6.35(1/4)
ID6.35(1/4)
(5-29/32)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
(4-23/32)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID12.7(1/2)
ID9.52(3/8)
700(27-9/16)
ID6.35(1/4)
ID6.35(1/4)
120(4-23/32)
ID15.88(5/8)
ID6.35(1/4)
ID6.35(1/4)
ID6.35(1/4)
ID6.35(1/4)
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID9.52(3/8)
150
120
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
(5-29/32)
(4-23/32)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID9.52(3/8)
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID9.52(3/8)
ID22.2(7/8)
ID9.52(3/8)
ID9.52(3/8)
ID12.7(1/2)
ID9.52(3/8)
720(28-11/32)
120(4-23/32)
ID15.88(5/8)
ID6.35(1/4)
150
120
(5-29/32)
(4-23/32)
ID9.52(3/8)
ID22.2(7/8)
ID9.52(3/8)
ID12.7(1/2)
700(27-9/16)
60*9=540(21-1/2)
107(4-7/32)
ID15.88(5/8)
ID6.35(1/4)
ID6.35(1/4)
ID6.35(1/4)
ID6.35(1/4)
150
120
ID6.35(1/4)
ID6.35(1/4)
(5-29/32)
ID6.35(1/4)
ID6.35(1/4)
(4-23/32)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID9.52(3/8)
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID9.52(3/8)
ID6.35(1/4)
ID6.35(1/4)
ID9.52(3/8)
ID12.7(1/2)
ID9.52(3/8)
ID22.2(7/8)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
ID9.52(3/8)
Liquid side
HR unit
Gas side
!
WARNING
Use a vacuum pump or Inert(nitrogen) gas when doing leakage test
or air purge. Do not compress air or Oxygen and do not use Flamma-
ble gases. Otherwise, it may cause fire or explosion.
- There is the risk of death, injury, fire or explosion.
150
(5-29/32)
!
NOTE
If the ambient temperature differs between the time when pressure is applied
and when the pressure drop is checked, apply the following correction factor
ID6.35(1/4)
There is a pressure change of approximately 0.01Mpa(1.5psi) for each 33.8°F
150
120
of temperature difference.
(5-29/32)
(4-23/32)
Correction = (Temp. at the time of pressurization – Temp. at the time of
ID9.52(3/8)
check) X 0.1
For example: Temperature at the time of pressurization
150
(5-29/32)
ID6.35(1/4)
150
120
!
CAUTION
(5-29/32)
(4-23/32)
To prevent the nitrogen from entering the refrigeration system in
the liquid state, the top of the cylinder must be at higher position
than the bottom when you pressurize the system.
Usually the cylinder is used in a vertical standing position.
ID6.35(1/4)
150
120
(5-29/32)
(4-23/32)
ID9.52(3/8)
Vacuum
Vacuum drying should be made from the service port provided on the outdoor
ID6.35(1/4)
150
unit's service valve to the vacuum pump commonly used for liquid pipe, gas
120
(5-29/32)
(4-23/32)
pipe and high/low pressure common pipe. (Make Vacuum from liquid pipe, gas
pipe and high/low pressure common pipe with the service valve closed.)
* Never perform air purging using refrigerant.
• Vacuum drying: Use a vacuum pump that can evacuate to -100.7kPa
(-14.6psi, 5Torr, -755mmHg).
- Evacuate the system from the liquid and gas pipes with a vacuum
pump for over 2 hrs and bring the system to -100.7kPa(-14.6psi).
After maintaining system under that condition for over 1 hr, confirm
the vacuum gauge rises. The system may contain moisture or leak.
- Following should be executed if there is a possibility of moisture re-
maining inside the pipe.
(Rainwater may enter the pipe during work in the rainy season or over
a long period of time)
After evacuating the system for 2 hrs, give pressure to the system to
0.05MPa(7.3psi)(vacuum break) with nitrogen gas and then evacuate
it again with the vacuum pump for 1hr to -100.7kPa(-14.6psi)(vacuum
drying). If the system cannot be evacuated to -100.7kPa(-14.6psi)
within 2 hrs, repeat the steps of vacuum break and its drying. Finally,
check if the vacuum gauge does not rise or not, after maintaining the
system in vacuum for 1 hr.
Vacuum
pump
Vacuum
pump
Indoor unit
Scale
Use a graviometer. (One that can measure
down to 0.1kg(0.22lbs)). If you are unable
to prepare such a high-precision
gravimeter you may use a charge cylinder.
3.8MPa(551psi) is 80.6°F
24 hour later : 3.73MPa(541psi), 68°F
In this case the pressure drop of 0.07MPa(10psi) is
because of temperature drop
And hence there is no leakage in pipe occurred.
Outdoor unit
Close
Close
Close
HR unit
Liquid side
Indoor unit
Gas side
Hide quick links:
Advertisement
Table of Contents
