Manitowoc Ice QF0400, QF2300, QF0800, QC0700 Refrigeration System, Section, 7-16, Connections

Refrigeration System Section 7

Important

Replace the liquid line drier before evacuating and recharging. Use only a Manitowoc (OEM) liquid line filter drier to prevent voiding the warranty.

Connections

Manifold gauge sets must utilize low loss fittings to comply with U.S. Government rules and regulations. Make these connections:

•Suction side of the compressor through the suction shut-off valve.

•Discharge side of the compressor through the liquid line shut-off valve.

•Receiver service valve, which evacuates the area between the check valve in the liquid line and the liquid line solenoid valve.

!Warning

Recovery/Evacuation requires connections at three points for complete system recovery/evacuation. A check valve is located in the ice machine head section between the liquid line shut-off valve and the receiver. The check valve prevents refrigerant migration from the receiver to the condensing unit in the off cycle. Connections must be made at three points (receiver service valve, suction line and liquid line) to allow recovery and evacuation of the entire system.

Recovery/Evacuation (QF2200/QF2300)

1.Place the toggle switch in the OFF position and disconnect all power to the ice machine and condensing unit.

2.Install the manifold gauges, charging scale and recovery unit or two-stage vacuum pump.

3.Open the receiver service valve halfway.

4.Open high and low side on the manifold gauge set.

5.Perform recovery or evacuation:

A.Recovery: Operate the recovery unit as directed by the manufacturer’s instructions.

B.Evacuation prior to recharging: Evacuate to 500 microns. Then allow the pump to run for an additional hour. Turn off the pump and perform a standing vacuum leak check.

6.Refer to Charging Procedures.

CONNECTIONS MUST BE
MADE AT 3 POINTS FOR
COMPLETE REFRIGERANT	SV3016
RECOVERY OR EVACUATION

!Warning

The receiver service valve (located in the ice machine head section) must be accessed during refrigerant recovery to allow complete removal of the refrigerant charge.

7-16 Revised 8/2003 Part No. 80-1214-3