Tectro TS 133 Manual De Instalación Y Servicio página 64

When Using the Vacuum Pump
(For method of using a manifold valve, refer to its operation manual.)
1. Completely tighten the flare nuts, A, B, C, D, connect the manifold valve charge hose to a charge port
of the low-pressure valve on the gas pipe side.
2. Connect the charge hose connection to the vacuum pump.
3. Fully open the handle low of the manifold valve.
4. Operate the vacuum pump to evacuate. After starting evacuation, slightly loose the flare nut of the
low valve on the gas pipe 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 low of the manifold valve and stop the
operation of the vacuum pump. Make evacuation for 15 minutes or more and check that the com-
pound meter indicates -76cmHg (-1x105 Pa).
6. Turn the stem of the packed valve B about 45 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 litt-
le higher than the atmosphere pressure.
7. Remove the charge hose from the low pressure charge hose.
8. Fully open the packed valve stems B and A.
9. Securely tighten the cap of the packed valve.
Compound meter
-76cmHg
Handle Lo
Charge hose
ELECTRICAL SAFETY AND GAS LEAK CHECK
• Electrical safety check
Perform the electric safe check after completing installation:
1. Insulated resistance
The insulated resistance must be more than 2M
2. Grounding work
After finishing grounding work, measure the grounding resistance by visual detection and groun-
ding 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, use an 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.
• Gas leak check
1. Soap water method:
Apply a soap water or a liquid neutral detergent on the indoor unit connection or outdoor unit con-
4
64
Manifold valve
Pressure gauge
Handle Hi
Charge hose
Vacuum pump
Low pressure valve
Fig. 24
.