Labconco Open Combination (Macro) Kjeldahl Systems 2123Series - Manual (Page 17)

Chapter 3: Normal Operation & Routine Maintenance
Product Service 1-800-522-7658 13
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:
Blower Exhaust System
No adjustment is required on the suction pressure at the manifold when used.
The remote blower should be inspected annually for debris, proper operation,
and checked for adequate airflow as specified on pages 11-12 of this manual.
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, piping assembly by boiling water in a number of flasks placed on the
digestion heaters. The remote blower should be turned on and operating
correctly to draw the steam through the fume pipe.