SP Scientific Freezemobile Series, Operator'S Manual, Page: 44 / 54

General Maintenance VirTis Freezemobile 25L and 35L
34 Rev 005, 02/12
© SP Scientific 2012
Refrigeration System
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. Always maintain at least 24 inches of clearance on all sides of the unit.
2. Maintain room temperature at approximately 20 °C. Higher temperatures may
result in reduced performance and shorten compressor life.
3. Remove the vent panel below the ice condenser to access and clean the
unit’s fins. Dust buildup and other obstructions to airflow may cause the unit to
malfunction.
Condenser Chamber
The condenser chamber is fabricated from stainless steel. Under normal use, it can
be rinsed and kept clean with a mild detergent.
If corrosive materials are being freeze-dried, thoroughly clean and rinse all parts of the
freeze dryer that come in contact with product moisture. This prevents residual build-
up of corrosive and contaminating materials on interior surfaces, protecting the freeze
dryer and the next product to be processed. Add baking soda or any mild buffering
agent to the rinse water to help neutralize acidic residue. A siphon type squeeze bottle
can be used to direct rinse spray into difficult to reach areas.
For more information, refer to Appendix B: Stainless Steel Cleaners.
Keep these fins clean
Detachable vent panel