Labconco Hooded Combination (Macro) Kjeldahl Systems 21179 Series - Manual (Page 12)

Chapter 2: Installation
Product Service 1-800-522-7658 9
Tap Water Supply
NOTE: ALL PLUMBING CONNECTIONS AND COMPONENTS MUST
BE FREE OF FOREIGN MATERIAL BEFORE FINAL CONNECTIONS
ARE MADE.
Distillation Manifold
The Hooded 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). Hooded 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 Hooded
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