Labconco Open Combination (Macro) Kjeldahl Systems 21237 Series - Manual (Page 11)

Chapter 2: Installation
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Tap Water Supply
NOTE: ALL PLUMBING CONNECTIONS AND COMPONENTS MUST
BE FREE OF FOREIGN MATERIAL BEFORE FINAL CONNECTIONS
ARE MADE.
Distillation Manifold
The Open Combination Macro-Kjeldahl Systems feature an upper distillation rack
with individual condensation columns, these are connected together by a common
manifold (6 columns per manifold). The tap water inlet and outlet connections are
3/4" NPT and the supply line should be minimum 1/2" ID for proper water flow
and heat removal capacity through the condensation columns (6-8 gallons/23-30
liters per minute). Open Combination Macro-Kjeldahl Systems with 12 or 18
heaters per rack will include two or three, 6 column manifolds which are
connected together in series.
The plumbing line for the outlet of the distillation manifold must be free of back
pressure to avoid flow restriction of the cooling water. If the Open Combination
Macro-Kjeldahl is equipped with the Acid Fume Water Aspirator Exhaust System
option, the distillation water drain should not be connected to the aspirator drain.
Unless provisions are made to handle the larger water volumes without water
backing up over the aspirator vent line.
Water discharged from the distillation manifold is not acid contaminated and
standard drain lines may be used for its removal.
Distillation Manifold Tap Water Connections
Figure 2-3