Hisense 2AMW35U4RGC Instrucciones De Instalación página 18

Installation instructions
5. Air Tight Test
Do use Nitrogen.
Connect the gauge manifold using charging hoses with a nitrogen
cylinder to check joints of the liquid line and the gas line stop
valves
.
Perform the air tight test
-
Don t open the gas line stop valves
'
Apply nitrogen gas pressure of 4.15MPa
Check any gas leakage at the flare nut connections
parts by gas leak detector or foaming agent
Gas pressure doesn't decrease is OK.
After the air tight test
6. Vacuum pumping and charge refrigerant
Vacuum Pumping
(1) Remove the service port cap of the stop valve on the gas pipe
side of the outdoor unit.
(2) Connect the manifold gauge and vacuum pump to the service port
of the stop valve on the gas pipe side of the outdoor unit.
(3) Run the vacuum pump. (Work for more than 15 minutes)
(4) Check the vacuum with the gauge manifold valve, then close the
gauge manifold valve and stop the vacuum pump.
(5) Leave it as is for one or two minutes. Make sure the pointer of the
manifold gauge remains in the same position. Confirm that the
pressure gauge shows -0.101MPa (or -760mHg).
(6) Remove the manifold gauge quickly from the service port of the
stop valve.
(7) After refrigerant pipes are connected and evacuated, fully open
all stop valves on both sides of gas pipe and liquid pipe.
(8) Open adjusted valve to add refrigerant (must be refrigerant is liquid).
(9) Tighten the cap to the service port.
(10) Retighten the cap.
(11) Leak test foam with halogen leak detector to check the flare nut
and brazing Carolina Department leaks. Use foam that not
generates ammonia (NH3) in the reaction.
(1) Each pipelines needs to be evacuated individually.
(2) An excess or a shortage of refrigerant is the main cause of trouble to the unit. Charge the correct refrigerant
quantity according to the description of label at the inside of the manual.
(3) Check refrigerant leakage in detail. If a large refrigerant leakage occurs, it will cause difficulty with breathing or
harmful gases will occur if a fire is being used in the room.
Additional refrigerant charge
The unit has been filled with refrigerant.
Please according "Piping Requirement" to calculate additional charge.
After vacuum pump procedure has been finished, first exhaust air from charge hose, then open valves, charge
refrigerant as "liquid" type through Liquid stop valve.
At the end, please close valves and record the refrigerant charging quantity.
.
.
.
.
release nitrogen gas.
,
！
or brazed
,
CAUTION
危 险
15
Procedure
Completion Applying
of Ref. Nitrogen
Piping Gas
Repairing
of Leakage
Part
Air tight procedure
manifold gauge
-0.101MPa
(-760 mmHg)
Check of
Pressure Pass
Decrease
Charge hose
(for R32)
Vacuum pump