FTS LYOSTAR 3, Operator'S Manual

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FTS Systems LyoStar™ 3 General Maintenance
Rev 006, 01/14 57
© SP Scientific 2014
Refrigeration System
The LyoStar™ 3 is designed for installation and operation in a room with a controlled
temperature of between 19 and 25 °C. If the ambient temperature is routinely higher
than the equipment specifications, the amount of refrigerant gas being condensed as
it passes through the condenser will be less. This could lead to premature failure of
the compressor(s) or compressor efficiency problems such as an inability to reach
maximum low temperature.
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:
Do not allow any paper, cloth or Kimwipes® to slip underneath the unit. These 1.
items obstruct airflow.
Always maintain at least 24 inches (61 cm) of clearance around all sides of 2.
the unit. If machines are installed side-by-side, increase the minimum
clearance to 48 inches (122 cm).
Maintain a room temperature of between 19 and 25 °C. Higher temperatures 3.
may result in reduced performance and shorten compressor life.
Clean the fins on the unit. Dust buildup may cause the unit to malfunction. 4.
Water-Cooled Condenser
The optional water-cooled condenser consists of a highly-efficient heat exchanger,
which removes up to 90 percent of the energy consumed by the compressor. If your
unit is equipped with a water-cooled refrigeration system, ensure that the water supply
is on and providing cooling water within a temperature range of 5 to 25 °C. Do not
operate the LyoStar™ 3 with a cooling water supply above 30 °C (86 °F). If the water
supply is off, the resulting high pressure in the system may damage the compressor.
The water-cooled condenser may require occasional flushing to remove deposits,
depending on the quality of the water supplied to the system. Periodically examine
connections for leaks or cracks.
Condenser Chamber
The condenser chamber is fabricated from stainless steel. Under normal use, it may
be rinsed and kept clean with a mild detergent. If corrosive materials are being
processed in the lyophilizer, thoroughly clean and rinse all parts of the freeze dryer
that come in contact with product moisture. This shall prevent the residual build-up of
corrosive and contaminating materials on interior surfaces, protecting the lyophilizer,
as well as the next product batch to be processed.
You may 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.