When we have connected the refrigerant pipe as follows diagram
,
we should do airtight test to
check whether the system is leakage.
Caution
:
● Pressured nitrogen [ 4.3MPa (44kg/cm2 ) for R410A] should be used in the airtight test.
● Tighten high pressure/low pressure valves before applying pressured nitrogen.
● Apply pressure from air vent mouth on the high pressure/low pressure valves.
● The high pressure/low pressure valves are closed when applying pressured nitrogen.
● The airtight test should never use any oxygen, flammable gas or poisonous gas.
1.10 Air Purge With Vacuum Pump
After the airtight test, we should remove the air in the refrigerant connecting pipes.
1) Using vacuum pump to do the vacuum, never using refrigerant to expel the air.
2) Vacuuming should be done from both liquid side and gas side simultaneously.
3) The system should be vacuumized until the vacuum pump indicates the pressure of the pipes
less than 10pa.
1.11 Refrigerant Amount To Be Added
Calculate the added refrigerant according to the diameter and the length of the liquid side pipe
of the outdoor unit/indoor unit connection. If the length of the liquid side pipe is less than 5
meters it is no need to add more refrigerant, so than calculating the added refrigerant the length
of the liquid side pipe must subtract 5 meters.
Содержание CSD80GN1
Страница 27: ...1 4 Dimensions of the outdoor unit 1 5 Installation space 1 Single unit installation...
Страница 28: ...2 Parallel connect the two units or above 3 Parallel connect the front with rear sides...
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Страница 56: ...The connection is described in the following figure The wiring terminal diagram as following figure...
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Страница 70: ...M thermal technical manual part 3 3 4 Field setting table...