Amana RCC Instruction Manual download pdf (Page 5)

WARNING

To avoid possible explosion:

• Never apply flame or steam to a refrigerant

cylinder. If you must heat a cylinder for

faster charging, partially immerse it in

warm water.

• Never fill a cylinder more than 80% full of

liquid refrigerant.

• Never add anything other than R-22 to an

R-22 cylinder.

• Store cylinders in a cool, dry place. Never

use a cylinder as a platform or a roller.

WARNING

To avoid possible explosion, use only

returnable (not disposable) service

cylinders when removing refrigerant from

a system.

• Ensure the cylinder is free of damage

which could lead to a leak or explosion.

• Ensure the hydrostatic test date does not

exceed 5 years.

• Ensure the pressure rating does not

exceed 400 lbs.

LEAK TESTING

WARNING

To avoid the risk of fire or explosion, never

use oxygen, high pressure air or flammable

gasses for leak testing of a refrigeration

system.

1. Before testing, ensure both hand valves on the gauge

manifold are closed relative to the center port (i.e.,

turned IN all the way.)

2. Attach the gauge manifold to the service valves on the

unit (see Figure 2).

Do not open the unit service valves.

Do not use refrigerant from the unit for leak testing. The

refrigerant in your unit has been precisely measured at

the factory for optimum performance.

3. Connect a cylinder of dry nitrogen to the center port on

the gauge manifold.

WARNING

To avoid possible explosion, the line from

the nitrogen cylinder must include a

pressure regulator and a pressure relief

valve. The pressure relief valve must be

set to open at no more than 150 psig.

4. Open the hand valve a minimal amount on the line

coming from the nitrogen cylinder.

5. Open the high pressure valve on the manifold gauge.

Pressurize the refrigerant lines and the indoor coil to

150 psig (1034 kPA). To reach 150 psig, you may need

to further open the hand valve on the nitrogen cylinder.

WARNING

To avoid possible explosion or equipment

damage, do not exceed 150 psig when

pressure testing.

6. Close the valve on the nitrogen cylinder and disconnect

it from the gauge manifold.

7. Check for leaks. Apply a soap solution on all connec-

tions and joints. If you see bubbles, you have a leak.

Mark these locations.

NOTE: If you use an electronic leak detector to test for

leaks, add a trace of R-22 to the system (if permitted by

current EPA regulations) before testing.

8. Using the gauge manifold, carefully release the nitro-

gen from the system. If leaks are found, repair them.

After repair, repeat the above pressure test. If no leaks

exist, proceed to

ID Coil and Line Sets Evacuation

ID COIL AND LINE SETS EVACUATION

A. LOW SIDE VALVE

B. HIGH SIDE VALVE

C. VACUUM PUMP

D. THERMOCOUPLE GAUGE

E. MANIFOLD GAUGE

F. CHARGING CYLINDER

HIGH VACUUM PUMP

LARGE DIAMETER

BRAIDED VACUUM

HOSES

GAUGE

PORTS OF

COND. UNIT

HIGH VACUUM

MANIFOLD

LOW SIDE

GAUGE

HIGH SIDE

GAUGE

DIAL-A-CHARGE

CHARGING CYLINDER

THERMOCOUPLE

VACUUM

GAUGE

Figure 2

Step 1. Confirm Proper Pump And Gauge Operation

a. Connect vacuum pump, gauge manifold set, vacuum

gauge and charging cylinder to unit service valves as

shown in Figure 2. Ensure all manifold valves are fully

closed.

b. Open the shutoff valve leading to the vacuum pump

(Figure 2) (C), start the pump, and watch the gauge

manifold. The readings in the gauge manifold should

drop to approximately 29 inches Hg. If this does not

happen, there is probably a leak in the pump and gauge

system. Repair the leak and test again.

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Amana RCC Instruction Manual Page 5

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