Labconco Open Combination (Macro) Kjeldahl Systems 2123Series - Manual (Page 8)

Chapter 1: Introduction
Product Service 1-800-522-7658 4
3. Acid Fume Piping Exhaust System. Located on the left side of the unit,
this exhaust piping removes excess sulfuric acid fumes from the digestion
flasks. Attention - The Exhaust Piping must be connected to a remote
blower to remove acid fumes. The unit does NOT have an integral
blower. The remote blower creates suction and draws acid fumes through
the CPVC digestion manifold and exhaust piping provided and pulls the
fumes under negative pressure out through a duct work system connected
to the remote blower and ultimately the building’s exterior. The 6"
exhaust stack on the left side of the unit must be connected to a leak-tight
PVC ductwork system that vents 10 ft (3 meters) above the building roof.
4. Temperature Gauge The condensation rack behind the upper distillation
heating elements requires cooling water. The temperature of the
distillation cooling water can be adjusted to promote condensation and
suit individual requirements with the flow control valve handle, located
below the distillation heaters. Water temperature is indicated on the
thermometer, which is located at the water outlet of the distillation
manifold. The water connections are 3/4" NPT and the supply line should
be 1/2" minimum for proper water flow through the unit. For facilities
where the ground water temperature exceeds 80°F (27°C), a recirculation
water chiller system will be required to achieve sufficient condensation
results.
5. Distillation Condensation Manifold Epoxy coated steel outer columns
with stainless steel inner condensation columns provide long life. Each of
the six column manifold features 3/4" NPT tap water inlet and outlets for
easy plumbing connections.