27 electrolux electrical work
When using the vacuum pump
For method of using a manifold valve, refer to its operation manual.
electrical safety electrolux 28
Electrical safety
Perform the electric safe check after completing installation:
1. Insulated resistance: The insulated resistance must be more than 2M . |
1. | Completely tighten the flare nuts, |
| A, B, C, D, connect the manifold |
| valve charge hose to a charge port |
| of the |
| gas pipe side. |
2. | Connect the charge hose |
| connection to the vacuum pump. |
3. | Fully open the handle Lo of the |
| manifold valve. |
4. | Operate the vacuum pump to |
| evacuate. After starting |
| evacuation, slightly loose the flare |
| nut of the Lo valve on the gas pipe |
8.Fully open the packed valve stems B and A.
9.Securely tighten the cap of the packed valve.
Indoor unit
2. | Grounding work: After finishing grounding work, measure the grounding |
| resistance by visual detection and grounding resistance tester. Make sure the |
| grounding resistance is less than 4 . |
3. | Electrical leakage check (performing during test running): During test |
| operation after finishing installation, the serviceman can use the electroprobe |
| and multimeter to perform the electrical leakage check. Turn off the unit |
| immediately if leakage happens. Check and find out the solution ways till the |
| unit operate properly. |
side and check that the air is |
entering (Operation noise of the |
vacuum pump changes and a |
compound meter indicates 0 |
instead of minus) |
5. After the evacuation is complete, |
fully close the handle Lo of the |
manifold valve and stop the |
operation of the vacuum pump. |
Make evacuation for 15 minutes or |
more and check that the |
compound meter indicates - |
76cmHg |
6. Turn the stem of the packed valve |
B about 45o counterclockwise for |
6~7 seconds after the gas coming |
out, then tighten the flare nut |
again. Make sure the pressure |
display in the pressure indicator is |
a little higher than the atmosphere |
pressure. |
7. Remove the charge hose from the |
Low pressure charge hose. |
Outdoor unit
Manifold valve |
|
| Charge |
hose | |
|
Handle Lo | Handle Hi |
Charge hose
Vacuum pump
Gas leak check
Soap water method
Apply a soap water or a liquid neutral detergent on the indoor unit connection or outdoor unit connections by a soft brush to check for leakage of the connecting points of th piping. If bubbles come out, the pipes have leakage.
Leak detector
Use the leak detector to check for leakage.
Caution
A:Lo packed valve, B: Hi packed valve C and D are ends of indoor unit connection.
indoor unit check point
Cover
Outdoor unit check point