Environmental Express AutoBlock II - Manual (Page 10)

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they are attached properly. Software may be lost if the batteries become fully
discharged.
2.3.6 All electrical connections have now been made. Using zip ties provided, position
all wires out of harm’s way. Be sure none of the electrical components hang near
the drain line, or lie upon the counter top where acid spills may occur.
2.3.7 Install 4” diameter acid-resistant duct to the exhaust fan assembly outlet. Secure
with an acid-resistant clamp. Be careful not to impede access to the inlet lines
located above the outlet. PVC dryer hose/pipe can be used, although accordion-
like tubing will decrease the velocity of the airflow. Vent to the outside of the lab
building or plumb into existing ductwork. The length of your duct run should not
exceed 25 feet. An additional exhaust fan must be installed if the 4” duct run
exceeds 25 linear feet. Additional fans are available from Environmental
Express.
Note: If the ductwork is located in a straight line above the AutoBlock
two 90 degree bends should be made with a water trap installed. This
should also decrease the chance for anything falling directly into the
squirrel cage of the fan. Environmental Express is not responsible for acid
liquid build-up or particles from ductwork that may fall into the exhaust
housing causing failure.
2.4 Air Intake Option
You may plumb the 4” white air-intake stub located on the upper rear panel of the
AutoBlock for make-up air. Do not exceed 25 linear feet without adding a second
exhaust fan. This step is optional.
2.5
Taking care not to damage the feet of your AutoBlock, lift – do not slide – the
unit into the position needed for operation.