Operator`s manual

VirTis BenchTop 2K, 4K and 6K General Maintenance

Revision 004, 12/09 37

Quickseal Valves

VirTis BenchTop units come equipped with Quickseal valves. These valves should be

serviced at least once a year.

To service the Quickseal valves:

1. Remove the valves from their ports.

2. Twist and pull the white selector until it is dislodged from the black rubber

body.

3. Clean the valves thoroughly with isopropyl alcohol to remove grease and dirt.

4. Inspect each cleaned selector carefully for damage.

Note: Do not use broken flask adaptors, as they can damage the white selector.

5. If scratches or cracks are found, the selector part(s) should be replaced.

6. Apply a thin film of high vacuum grease to acceptable selector(s) and

reassemble.

Refrigeration System

The Air-Cooled Condenser

It is very important to keep the air-cooled condenser clean. This is where high-

pressure vapor from the compressor is converted to liquid refrigerant by rejecting the

heat gained from the vapor condenser into the ambient air. Reduced airflow over the

condenser can result in severely reduced performance and may shorten the life of the

compressor.

To maintain the air-cooled condenser and compressor:

1. Do not allow any paper products (e.g., paper towels, Kimwipes®) or cloth to

slip underneath the unit. These items will obstruct the airflow.

2. Always maintain at least four inches of clearance on all sides of the unit.

3. Maintain the room temperature at approximately 20 °C. Higher temperatures

may result in reduced performance and shortened compressor life.

4. Clean the fins on the bottom of the unit. Dust buildup may cause the unit to

malfunction.

Keep these fins

clean.