Rinnai RINV70R-A Guía de instalación descargar pdf (Pagina 15)

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 fifth 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 connection parts.

You must test the leakage, generally,

it can be tested by soap water.

● 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 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 Lo of the manifold valve.

4.Operate the vacuum pump to evacuate. After starting evacuation, slightly loose

the flare 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 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 compound meter

indicates -76cmHg(-1×10 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 suer 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.

8.Fully open the packed valve stems B

and A.

9.Securely tighten the cap of the packed

valve.

If the A/C is filled with R410a, make sure to

Outdoor unit

To indoor unit

Liquid side

Gas side

Stop valve(open)

Cover

T-branch valve(open)

Hexagon wrench

Auxiliary cover

- 13 -

Vapor side

Packed valve

Half union

Refrigerant

Outdoor

unit

Indoor

unit

Gas side

Liquid side

Manifold valve

Compound meter

Pressure gauge

-76cmHg

Handle Lo

Charge hose

Low pressure valve

Vacuum pump

Charge hose

Handle Hi

1 2 ... 10 11 12 13 14 15 16 17 18 19

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Rinnai RINV70R-A Guía de instalación Pagina 15

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