MODEL YB8 INSTALLATION AND OPERATION
April 1999/Manning Environmental Inc.
Page A-5
Figure 5 - Refrigerator
Figure 6 - Intake Hose
Whenever a sampling sequence is initiated the sampler follows the steps outlined above, and draws a sample.
The controller then determines the transit time of the sample to reach the liquid sensor. Assume for example
there was an increase in the amount of lift from the source liquid to the unit. This would increase the time
needed for a sample to reach the liquid sensor and the pump. The controller, in a case such as this, will
automatically compensate for the change in lift by increasing the amount of time the peristaltic pump is able
to pull source liquid. This ensures the sampler has enough time to collect the correct amount of sample fluid.
The compensation applies to either an increase or decrease in lift height.
Refrigerator
The refrigerator is an industrial grade unit with the ability t o cool and maintain
samples at the EPA recommended 4ºC. Modifications have been performed on the
refrigerator that enable it to withstand event the harshest environments. The
condenser has been baked dip-coated with enamel and the copper refrigerant lines
are coated with asphalt cork tape to prevent hydrogen sulfide gas from attacking
the copper lines and the brazed joints. The thermostat is located inside the
refrigerator which affords it additional protection from the environment. The
evaporation coils and cabinet both have two coats of baked on acrylic enamel with
the cabinet having the additional protection of an iron phosphate pre-treatment.
Both t he fan motor and the compressor are designed fo r greater durability and
resistance to atmospheric attack. The unit boasts extensive insulation for
maximum cooling retention, and a full perimeter magnetic door gasket with a
urethane coating to resist corrosion and seal the cold inside. The door is also
available with an optional locking hasp to prevent unauthorized entry. The sample containers, suspension
plate, and distributor arm for multiple bottle operation are located within the environmentally controlled
chamber of the refrigerator.
Wetted Parts
Wetted parts are those pieces of the sampler that come in direct contact with the sample liquid. The main
components of the wetted parts for the Manning Model YB8 are the intake hose and strainer, the pump
tubing, the discharge tubing, the bottle full sensor (in single bottle units) the distribution assembly (in multiple
bottle units) and the sample bottles. I f t he source liquid to be sampled is a non-priority pollutant (Non-
Toxic) t hen all parts t hat touch t he liquid are either PVC (Polyvinyl Chloride), medical grade silicone rubber,
ABS (Acrylonitrile Butadiene Styrene) plastic, or Stainless Steel. Parts in contact with a sample source that
is a priority pollutant (Toxic) are required to be Teflon , glass, stainless steel, or medical grade silicone
®
rubber. These materials are recognized and accepted as non-contaminating materials. This permits the
sampling of a wide variety of toxic pollutants such as hydrocarbons and chlorine-based compounds.
Intake Hose
The 3/8" ID by 5/8" OD intake hose is constructed of either PVC (Polyvinyl
Chloride) or PTFE. Y ou can differentiate the hoses by
their physical characteristics. The PVC is flexible and slightly tacky to the
touch. T he PTFE is not very flexible and is also very
smooth and slick to the touch.
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