User Manual

Chapter 3: Normal Operation & Routine Maintenance
Product Service 1-800-522-7658
15
Clean-Up and Cosmetic Guidelines
• Keeping the Open Macro Kjeldahl System clean will preserve the
appearance and improve life of the equipment.
• The equipment can be kept clean by washing with a weak solution of
sodium hydroxide and rinsing with clear water.
• Sulphate, a salt of Sulfuric Acid, may build up between the channel
support and the fume removal manifold. Neutralize this with a weak
solution of sodium hydroxide periodically to keep the unit clean.
Fume Removal Manifold Suction Adjustment
The suction along the fume removal manifold is adjusted as follows:
Water Aspirator Exhaust System
Suction is adjusted by changes in the water supply flow rate. The suction
may be decreased by reducing the flow rate.
Blower Exhaust System
No adjustment is required on the suction pressure at the manifold when used.
The blower fan should be inspected annually for debris and proper operation.
Exhaust Systems Maintenance
Sometimes the suction in the nipples is reduced due to obstruction within the
exhaust system. These obstructions can usually be washed from the fume
pipe, blower housing or water ejector by boiling water in a number of flasks
placed on the digestion heaters. The blower or water aspirator should be in
operation to draw the steam through the fume pipe.
The direct drive motor should be lubricated in accordance with the
manufacturer’s recommendations for heavy-duty usage by adding appropriate
minimal drops of S.A.E. 10 automotive type oil annually or at least every
1500 hours of operation.
CAUTION: Do not oil excessively!