Remington REM-05-240-GH Service Manual download pdf (Page 23)

3. Install a process tube to sealed system.

4. Make necessary repairs to system.

5. Evacuate system to 200 microns or less.

6. Weigh in refrigerant with the property quantity of R-410A

refrigerant.

7. Start unit, and verify performance.

8. Crimp the process tube and solder the end shut.

Proper safety procedures must be followed,

and proper protective clothing must be worn

when working with a torch.

Failure to follow these procedures could

result in moderate or serious injury.

Proper safety procedures must be followed,

and proper protective clothing must be worn

when working with liquid refrigerant.

Failure to follow these procedures could

result in minor to moderate injury.

WARNING

CAUTION

BURN HAZARD

FREEZE HAZARD

Proper safety procedures must be followed,

and proper protective clothing must be worn

when working with a torch.

Failure to follow these procedures could

result in moderate or serious injury.

WARNING

BURN HAZARD

Method Of Charging / Repairs

The acceptable method for charging the RAC system is the

Weighed in Charge Method. The weighed in charge method is

applicable to all units. It is the preferred method to use, as it is

the most accurate.

The weighed in method should always be used whenever

a charge is removed from a unit such as for a leak repair,

compressor replacement, or when there is no refrigerant

charge left in the unit. To charge by this method, requires the

following steps:

1. Install a piercing valve to remove refrigerant from the

sealedsystem. (Piercing valve must be removed from the

system before recharging.)

2. Recover Refrigerant in accordance with EPA regulations.

ELECTRIC SHOCK HAZARD

WARNING

Turn off electric power before service or

installation.

Extreme care must be used, if it becomes

necessary to work on equipment with power

applied.

Failure to do so could result in serious injury or

death.

Sealed Refrigeration System contains refrigerant

and oil under high pressure.

Proper safety procedures must be followed,

and proper protective clothing must be worn

when working with refrigerants.

Failure to follow these procedures could

result in serious injury or death.

WARNING

HIGH PRESSURE HAZARD

Undercharged Refrigerant Systems

An undercharged system will result in poor performance

(low pressures, etc.) in both the heating and cooling

cycle.

Whenever you service a unit with an undercharge of

refrigerant, always suspect a leak. The leak must be

repaired before charging the unit.

To check for an undercharged system, turn the unit on,

allow the compressor to run long enough to establish

working pressures in the system (15 to 20 minutes).

During the cooling cycle you can listen carefully at the exit

of the metering device into the evaporator; an intermittent

hissing and gurgling sound indicates a low refrigerant

charge. Intermittent frosting and thawing of the evaporator

is another indication of a low charge, however, frosting

and thawing can also be caused by insufcient air over

the evaporator.

Checks for an undercharged system can be made at

the compressor. If the compressor seems quieter than

normal, it is an indication of a low refrigerant charge.

A check of the amperage drawn by the compressor

motor should show a lower reading. (Check the Unit

Specication.)

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Remington REM-05-240-GH Service Manual Page 23

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