Cornelius CR1200, IAC 322, IAC227, CR800, CR1400, IWC530, IWC330 Remote System Evacuation/Re-Charge

REMOTE SYSTEM EVACUATION/RE-CHARGE

All field repairs to the sealed system must start with a total discharge of the system following the requirements of the Clean Air Act of July, 1992.

Proper evacuation of the total remote system will require a three (3) point hook-up of your manifold and hose set, (see drawing):

Point #1 - Cuber receiver outlet valve

Point #2 - Cuber high side service valve

Point #3 - Cuber low side service valve

Evacuation:

1.With cuber power supply turned “OFF” disconnect and insulate all 3 compressor leads at the compressor. Turn power supply on, place power switch in the “on” position. This will energize (open) the Liquid Line so- lenoid allowing evacuation of the Liquid Line between the solenoid and the expansion valve(s).

2.Evacuate system to 200/250 microns or less. At this point, there should be a holding test of five(5) minutes. You may expect a slight loss of vacuum as normal. A rapid rise to normal atmospheric pressure indicates moisture still present in the system. On a “wet” system, it will prove beneficial to use heat lamps to warm the compressor dome and evaporator surface during evacuation.

3.Turn cuber power switch OFF. Reconnect compressor leads.

4.*After proper evacuation hold test has been performed, the refrigerant charge should be “dumped” into the receiver until the pressure equalizes, stopping the flow. Do not try to throttle the refrigerant flow. Doing so will allow system pressure to balance too soon. The high-side service valve should be closed and the bal- ance of the charge fed slowly through the suction side service valve with the compressor operational. Con- trol the feed rate at no faster than four (4) ounces [113.g] per minute to ensure the compressor oil does not become too saturated with refrigerant resulting in a loss of compressor lubrication.

5.All refrigerant re-charging must be weighed into the system, utilizing an electronic charging scale. DO NOT attempt to recharge the system by sight glass, system pressure, amperage, frost line or sweat patterns.

6.Always leak check entire system after recharge.

CAUTION: Before programming the electronic scales to “dump” the charge, de-energize the liquid line solenoid, close the shut-off valve on vacuum pump and low side of the manifold set.

EVACUATION

	MANIFOLD SET
OPEN	OPEN
	OPEN
RECEIVER	HIGH SIDE
	SERVICE
	VALVE
OPEN	LOW
	SIDE
	SERVICE
	VALVE

RECEIVER

OUTLET

VALVECLOSED

1ST STAGE CHARGING

	MANIFOLD SET
OPEN	CLOSED
	CLOSED
RECEIVER	HIGH SIDE
	SERVICE
	VALVE
OPEN	LOW
	SIDE
	SERVICE
	VALVE

RECEIVER

OUTLET

VALVEOPEN

2ND STAGE CHARGING

COMPRESSOR OPERATING

CLOSED	MANIFOLD SET
	OPEN
	CLOSED
RECEIVER	HIGH SIDE
	SERVICE
	VALVE

CLOSED

LOW SIDE

SERVICE

VALVE

RECEIVER

OUTLET

VALVEOPEN

CHARGING

OPEN CYLINDER

VACUUM

CLOSED

VACUUM

CHARGING CYLINDER

CHARGING

CYLINDER

CLOSED

VACUUM

PUMP CLOSED

ELECTRONIC

SCALE

PUMP

OPEN ELECTRONIC

SCALE

PUMPOPEN

ELECTRONIC

SCALE

166240004

78	12/1/94
	Rev 3/4/96