Labconco Hooded Combination (Macro) Kjeldahl Systems 21178 Series - Manual (Page 19)

Chapter 3: Normal Operation & Routine Maintenance
Product Service 1-800-522-7658 15
Clean-Up and Cosmetic Guidelines
• Keeping the Hooded Macro Kjeldahl System clean will preserve the
appearance and improve life of the equipment.
• Access to the blower exhaust or water aspirator system is gained by
removing the lower left front access panel, located below the
electrical panel.
• 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 by boiling water in a number of flasks placed on the digestion heaters.
The remote blower should be turned on and operating to draw the steam
through the fume pipe.