Amana RCC Manual de instrucciones descargar pdf (Pagina 8)

If pressures and amp draw are too high, remove charge.

If you are not using the “Matched Combination” which is

listed on the unit "Specification Sheet", check subcooling

(TEV coils) or superheat (flowrator coils) as detailed below.

AMANA-Approved Mix-Matched System Combinations

Use Amana expanded performance multiplier tables in

addition to the following procedures.

INDOOR COIL WITH EXPANSION VALVE

At stabilized cooling conditions and with an outdoor tem-

perature of 60°F or higher, the subcooling at the outdoor

unit liquid line service valve should be as specified in the

specification sheet. Add or remove charge as required.

INDOOR COIL WITH ORIFICE

For a proper superheat reading, measure the refrigerant

pressure and temperature at the outdoor unit vapor line

service valve. The superheat should be within 3°F of that

shown on the

Desired Superheat vs Outdoor Temperature

chart (

page 9)

. If the superheat is higher, add charge. If the

superheat is lower, remove charge.

EXAMPLE: The low side pressure is 84 psi. The low side

temperature is 80°F. The outdoor temperature is 95°F. The

indoor temperature is 85°F. By referring to a pressure

temperature chart, you will see that 84 psi equals a satu-

rated temperature of 50°F. The superheat is 80 - 50 = 30°F.

The chart shows a superheat of 20°F is ideal for these

conditions. Since our superheat is 30 - 20 = 10°F higher

than ideal, charge must be added.

If the system is performing properly, reinstall the service

port caps and the valve bonnets. With the valve opened, the

valve bonnet is the primary seal against refrigerant leaks.

See the table below for the torque required for an effective

seal on the valve bonnet (1/6 turn past finger tight).

Tubing Size Torque (Foot-Pounds)

3/8 10

1/2, 5/8, 3/4 14

7/8, 1 1/8 16

After closing the valve bonnet, perform a final refrigerant

leak test on the valves and sweat connections. Return the

room thermostat to the desired settings.

Troubleshooting

(QUALIFIED SERVICER ONLY)

When troubleshooting, the first step should always be to

check for clean coils, clean filter(s), and proper airflow.

Indoor airflow should be 350 to 450 CFM per ton of cooling,

based on the size of the outdoor unit.

If further information is needed, see the Remote Cooling

Service Manual.

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Amana RCC Manual de instrucciones Pagina 8

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