Kentatsu KSGRE26HZAN1 Manual De Instalación Y Funcionamiento página 13

Expelling the air in the pipes and the indoor unit
Expelling the air: humid air in the refrigerating system might cause
trouble of compressor.
 Take off the cover from the stop valve and T-branch valve.
 Take off the auxiliary cover from the T-branch valve.
 Turn the stop valve rod anti-clock wise to an angle of 90 degree,
keep it open for 8 seconds and close the valve.
 Check whether there is air leakage at all connection parts of
pipes.
 Push the top rod of T-branch valve by hexagon wrench to expel
air.
 Repeat the third and fi fth steps.
 Open the stop and T-branch valve with a hexagon wrench to
make the unit operate.
 There is no leakage allowed, please check all the piping connec-
tion parts. You must test the leakage, generally, it can be tested
by soap water.
 If the A/C is fi lled with R410a, make sure to discharge air and
moisture remaining in the refrigerant system with a vacuum
pump.
(For method of using a manifold valve, refer to its operation
manual.)
1. completely tighten the fl are 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 Lo of the manifold valve.
4. Operate the vacuum pump to evacuate. After starting evacua-
tion, slightly loose the fl are mut of the Lo 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 in-
stead 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 com-
pound meter indicates -76cmHg(-1 × 105Pa).
6. turn the stem of the packed valve B about 45° counterclockwise
for 6~7 seconds after the gas coming out, then tighten the fl are
nut again. Make suer the pressure display in the pressure indica-
tor is a little 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.
Outdoor unit
Vapor side
T-branch valve (open)
Hexagon wrench
Auxiliary cover
Refrigerant
Outdoor
unit
Gas side
Liquid side
Packed
valve
Manifold valve
Compound meter
Handle Lo
Charge hose
Low pressure valve
13
To indoor unit
Liquid side
Gas side
Stop valve(open)
Cover
Indoor
unit
Half union
Pressure gauge
HandIe Hi
Charge hose
Vacuum pump