Amana CKF60 Instrucciones de operaciones descargar pdf (Pagina 5)

1. 3/8" valve to 5 - 10 in-lbs (0.56-1.30 Nm)

2. 5/8" valve to 5 - 20 in-lbs (0.56-2.26 Nm)

3. 3/4" valve to 5 - 20 in-lbs (0.56-2.26 Nm)

4. 7/8" valve to 5 - 20 in-lbs (0.56-2.26 Nm)

Do not introduce liquid refrigerant from the cylinder into the

crankcase of the compressor as this may damage the com-

pressor.

1. Purge gauge lines after attaching to the service valves.

2. Determine the proper charge from the serial data plate.

Charge includes the evaporator coil and 7.6 m of line set.

Systems having more than 7.6 m of interconnecting tubing

require an additional charge allowance of 6 oz.

3. Break the vacuum by opening the suction and liquid

valves on the gauge set and weighing in the calculated

charge.

4. Set thermostat to call for cooling. Check indoor and

outdoor fan operation and allow system to stabilize for 10

minutes for fixed orifices.

FINAL CHARGE ADJUSTMENT

The outdoor temperature must be 60°F (16°C) or higher.

Set the room thermostat to COOL, fan switch to AUTO,

and set the temperature control well below room tempera-

ture. After system has stabilized per startup instructions,

check superheat as detailed in the following section.

GENERAL:

The following information has been developed to assist the

service technician in determining the proper charge for

Goodman

Heat Pump Systems.

It must be noted that many field variations exist that may

effect the operating temperature and pressure readings of a

heat pump system.

It should also be noted that all Goodman

Heat Pump

Systems utilize fixed orifice refrigerant control devices. As such,

the following procedures have been developed for this type of

refrigerant control device.

I. DETERMINATION OF INDOOR AIR FLOW (L/S) AND

HEATING CAPACITY (KW)

Prior to using the methods described below to check the

system’s charge it is important to verify that the system is

delivering sufficient air across the indoor coil (L/s, liters per

second), as well as, the operating capacity of the system. The

following procedures are suggested methods for determin-

ing the system air flow (L/s) and its operating capacity (kW).

Airflow Test Instruments - There are a number of readily

available instruments which can be used in the field for airflow

determination such as Barometers, Volume-Aire Air Balanc-

ers, Anemometers, and Velometers. When using these de-

vices it is important to follow the manufacture’s instructions

provided with them.

Airflow Determination - Indoor Coil

The heat pump system has been designed for optimum perfor-

mance with the airflow across the indoor coil equaling

approximately 190 L/s per TON.

e.g.

A 2 TON system should have 2 x 190 = 380 L/s.

Temperature Rise Method - Although not as accurate as the

use of test equipment, a method of determining the indoor

airflow in a system employing electric resistance heat as the

backup heat source is by the temperature rise method and is

calculated using the following formula:

828.3 x Input Power (kW)

Air Flow (L/s) =

Temperature Rise (°C)

where

measured input voltage (Volt) x current (Amp)

kW =

1000

e.g.

input voltage = 230 Volt, measured current 35 amps

temperature rise = 12°C

air flow = 828.3 * 230 * 35 / 1000 / 12

= 556 (L/s)

NOTE: The compressor circuit (outdoor unit) must be off

to insure that the Temperature Rise measured across

the indoor unit is due only to the electric heat.

The following procedure should be followed in determining

the temperature rise across the indoor section:

1. Use the same thermometer for the measuring the return

and supply air temperatures to avoid thermometer error.

2. Measure the temperatures within 1.8 meters of the indoor

section and downstream from any mixed air source mak-

ing sure that the thermometer is not exposed to any

radiant heat areas.

3. Make sure that the air temperature is stable before making

measurement.

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