ISCO 6700SR, Instruction Manual, Page: 87 / 190

6700SR Refrigerated Sampler
69
Suction Line, Pump Tube, and Discharge Tube
Clean the suction line, pump tube, and discharge tubes by placing
the end of the suction line in a cleaning solution and pumping it
through the delivery system. Rinse with clean water. If these items
are severely contaminated, replace them. For critical sampling ap-
plications, see Cleaning Protocols for Priority Pollutants on page 69.
Strainers
Clean the strainers with a brush and soapy water.
Cleaning the Condenser
The condenser coil and surrounding areas should be cleaned annu-
ally, more frequently under severe operating conditions. To clean
the condenser:
1. Remove the screws that hold the back panel on to the refrig-
erator and remove the panel.
2. Vacuum the fan, compressor, and surrounding areas.
3. Check the fan for freedom of movement. Oiling the fan motor
is not necessary because the motor bearings are sealed. If the
fan motor does not rotate freely, it should be replaced.
4. Replace the back panel.
5. Remove the front grill. Vacuum the condenser coil and sur-
rounding areas.
6. Replace the grill.
Cleaning Protocols for Priority Pollutants
Clean sampling equipment is essential for valid laboratory analy-
sis. Isco recommends that you develop cleaning protocols in consul-
tation with a laboratory analyst when designing the monitoring
program. For example, to clean sample bottles, suction line, and
pump tubes, Lair (1974) suggests these protocols used by USEPA
Region IV Surveillance and Analysis field personnel engaged in
NPDES compliance monitoring. The protocols are based on US. En-
vironmental Protection Agency Publications EPA-600/4-77-039
(Sampling of Water and Wastewater by Dr. Phillip E. Shelley).
Isco Glass Sample Bottles
1. One spectro-grade acetone rinse.
2. Dishwasher cycle (wash and tap water rinse, no detergent).
3. Acid wash with at least 20 percent hydrochloric acid.
4. Dishwasher cycle (wash and tap water rinse, no detergent).
5. Replace in covered Isco tubs.
Removing the front or back
panel exposes electrical and
mechanical hazards. Discon-
nect power before performing
any service activities.
WARNING
For critical sampling applica-
tions, consider replacing the
suction line, pump tube, and dis-
charge tube. Replacement elimi-
nates the possibility of any cross
contamination from previous
sampling sites.
Note