22
6.4 Installation for the first time
Air and moisture in the refrigerant system have undesirable effects as below:
●
Pressure in the system rises.
●
Operating current rises.
●
Cooling or heating efficiency drops.
●
Moisture in the refrigerant circuit may freeze and block capillary tubing.
●
Water may lead to corrosion of parts in the refrigerant system.
Therefore, the indoor units and the pipes between indoor and outdoor units must be leak tested
and evacuated to remove gas and moisture from the system.
Gas leak check (Soap water method):
Apply soap water or a liquid neutral detergent on the indoor unit connections or outdoor unit
connections by a soft brush to check for leakage of the connecting points of the piping. If bubbles
come out, the pipes have leakage.
1. Air purging with vacuum pump
1) Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the
2-way and
3-way valves are set to the closed position.
2) Connect the charge hose with the push pin of handle lo to the 3-way valves gas service port.
3) Connect the charge hose of handle hi connection to the vacuum pump.
4) Fully open the handle Lo of the manifold valve.
5) Operate the vacuum pump to evacuate.
6) Make evacuation for 30 minutes and check whether the compound meter indicates -0.1Mpa. If
the meter does not indicate -0.1Mpa after pumping 30 minutes, it should be pumped 20 minutes more. If
(Indoor unit)
(Liquid side)
(Gas side)
Vacuum
pump
Vacuum
pump
Lo
Hi
Handle Hi
Two-way valve
Close
Manifold valve
Compound meter
Pressure
gauge
20Pa
Handle Lo
Charge hose
Charge hose
(Outdoor unit)
Close
Three-way valve
Содержание MOA-07HN1-QC2
Страница 1: ...XSEU A 1202 SERVICE MANUAL MIDEA AIRCONDITIONER EUROPE MARKET SPLIT WALL MOUNTED TYPE X ON OFF SERIES...
Страница 11: ...9 3 Dimension 3 1 Indoor Units Figure 1 Figure 2...
Страница 15: ...13 5 Wiring Diagram 5 1 Indoor Units MSX 07HRN1 QC2 MSX 09HRN1 QC2 MSX 12HRN1 QC2 MSX 18HRN1 QC2...
Страница 16: ...14 MSX 21HRN1 QB8W MSX 24HRN1 QB8W...
Страница 17: ...15 5 2 Outdoor Units MOA 07HN1 QC2...
Страница 18: ...16 MOA1 09HN1 QC2 MOA 09HN1 QC2 MOB1 12HN1 QC2 MOB 12HN1 QC2...
Страница 19: ...17 MOF 18HN1 QC2...
Страница 20: ...18 MOF1 21HN1 QB8W MOF3 24HN1 QB8W...
Страница 32: ...30 Use torque wrench to tighten the service port cap to a torque of 18N m Be sure to check for gas leakage...
Страница 35: ...33 Ionizer Plasma function indicator This indicator illuminates when Ionizer Plasma function is on...