Bedienungsanleitung Maxicool AE series Luna (Seite 30 von 35) (Englisch)

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 Page 30 

3. Open the Low Pressure side of the manifold

gauge. Keep the High Pressure side closed.

4. Turn on the vacuum pump to evacuate the

system.

5. Run the vacuum for at least 15 minutes, or

until the Compound Meter reads -76cmHG

(-10 Pa).

6. Close the Low Pressure side of the manifold

gauge, and turn off the vacuum pump.

7. Wait for 5 minutes, then check that there

has been no change in system pressure.

8. If there is a change in system pressure, refer

to Gas Leak Check section for information

on how to check for leaks. If there is no

change in system pressure, unscrew the cap

from the packed valve (high pressure valve).

9. Insert hexagonal wrench into the packed valve

(high pressure valve) and open the valve by

turning the wrench in a 1/4 counterclockwise

turn. Listen for gas to exit the system, then

close the valve after 5 seconds.

10. Watch the Pressure Gauge for one minute

to make sure that there is no change in

pressure. The Pressure Gauge should read

slightly higher than atmospheric pressure.

Flare nut

Cap

alve body

Valve stem

11. Remove the charge hose from the service port.

12. Using hexagonal wrench, fully open both the

high pressure and low pressure valves.

13. Tighten valve caps on all three valves (service

port, high pressure, low pressure) by hand.

You may tighten it further using a torque

wrench if needed.

OPEN VALVE STEMS GENTLY

When opening valve stems, turn the hexagonal

wrench until it hits against the stopper. Do not

try to force the valve to open further.

Note on Adding Refrigerant

ADDITIONAL REFRIGERANT PER PIPE LENGTH

Connective Pipe

Length (m)

Air Purging

Method

Additional Refrigerant

< Standard pipe length Vacuum Pump N/A

> Standard pipe

length

Vacuum Pump

Liquid Side: Ø 6.35 (ø 0.25”)

R22:

(Pipe length – standard length) x 30g/m

(Pipe length – standard length) x 0.32oZ/ft

Inverter R410A:

Fixed-frequency R410A:

Inverter R410A:

Fixed-frequency R410A:

(Pipe length – standard length) x 15g/m

(Pipe length – standard length) x 0.16oZ/ft

(Pipe length – standard length) x 20g/m

(Pipe length – standard length) x 0.21oZ/ft

(Pipe length – standard length) x 40g/m

(Pipe length – standard length) x 0.42oZ/ft

Liquid Side: Ø 9.52 (ø 0.375”)

R22:

(Pipe length – standard length) x 60g/m

(Pipe length – standard length) x 0.64oZ/ft

(Pipe length – standard length) x 30g/m

(Pipe length – standard length) x 0.32oZ/ft

CAUTION

DO NOT mix refrigerant types.

Fig. 7.2

Air Evacuation

Some systems require additional charging depending on pipe lengths. The standard pipe length varies

according to local regulations. For example, in North America, the standard pipe length is 7.5m (25’).

In other areas, the standard pipe length is 5m (16‘). The additional refrigerant to be charged can be

calculated using the following formula:

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