Amana RHF Manual de Instruções descarregar pdf (Página 8)

System Startup

PRELIMINARY CHARGE ADJUSTMENT

CAUTION

If this unit has a crankcase heater (see

Specification Sheet or wiring diagram) con-

nect electrical power to the unit for four

hours before operating the compressor.

Failure to do so could result in compressor

damage.

IMPORTANT!

During all installation and service work,

follow all regulations of the Environmental

Protection Agency (EPA). This system uses

refrigerant R-22. R-22 is an HCFC

(HydroChloro-FluoroCarbon). It is a

violation of EPA regulations to discharge

HCFC into the atmosphere and doing so

may result in fines or other penalties.

After completing the system piping, tests for leaks, system

evacuation, and electrical wiring, open the suction and

liquid valves on the unit using an Allen wrench.

The outdoor unit is factory-charged with enough R-22 for

the matching indoor blower coil or matching A-coil plus 25

feet of 3/8 liquid line. For liquid line lengths greater than 25

feet, add 0.55 oz. of R-22 per additional foot up to 50 feet.

For line sets over 50 feet consult an Amana distributor. For

liquid line lengths less than 25 feet, subtract 0.55 oz. of R-

22 per deviating foot.

CAUTION

Using refrigerant that does not meet ARI

Standard 700 may cause compressor dam-

age and void the warranty.

IMPORTANT: If adding refrigerant to a system, add only

refrigerant vapor (not liquid) through the suction valve (low

side) on the outdoor unit. Any other practice may cause

compressor damage.

FINAL CHARGE ADJUSTMENT

If the outdoor temperature is 60°F or higher, set the room

thermostat to COOL, fan switch to AUTO, and set the

temperature control well below room temperature.

If the outdoor temperature is below 60°F and you are

installing a matching system, set the room thermostat to

HEAT, fan switch to AUTO, and set the temperature control

well above room temperature.

Measure the low side pressure and temperature from the

pressure tap provided. See Figure 4. Measure the high

side pressure and temperature from the liquid line service

valve.

VAPOR LINE

SERVICE VALVE

LOW SIDE

PRESSURE TAP

LIQUID LINE

SERVICE VALVE

Figure 4

Turn the electrical power on, and let the system run for

several minutes. It will take some time for the refrigerant

pressures to stabilize.

Compare the operating pressures and outdoor unit amp

draw to the numbers listed in the outdoor unit Specification

Sheet. If pressures and amp draw are too low, add charge.

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.

ID 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.

ID COIL WITH ORIFICE (RHE MODELS ONLY)

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 (see page 9). If the superheat is higher, add charge.

If the superheat is lower, remove charge.

NOTE: RHF models are only rated with TXV on the indoor

coil.

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; to get 20°F, 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 following table for the torque required for an

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

1 2 3 4 5 6 7 8 9 10 11 12 13 14

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