Exhaust System Requirements; Connecting The Cabinet To Utility Service Lines - Labconco Logic+ 30348 Series User Manual

If your research involves the use of toxic compounds or volatile materials, contact
your facility's safety officer or Labconco to ensure that your Purifier and its exhaust
system are compatible with the materials you will be working with.

Exhaust System Requirements

The cabinet exhaust stack is sized to accept 10-inch (254 mm) stainless steel
ductwork. The exhaust system's blower should be sized to handle the exhaust
volume of each cabinet, as shown in the QuickChart (Appendix E). The exhaust
system must maintain a static pressure equal to or greater than the system
pressure, plus a pressure of 1.5 inches (38 mm) water for the Logic cabinet. In
order to get the maximum life out of the cabinet's exhaust filter, the system needs
to be able to operate at an additional 2.0 inches (51 mm) of vacuum, compared to
the initial total system pressure.
NOTE: The exhaust system should be fitted with a backdraft damper
(Catalog Number 3858800) to prevent the reversing of airflow in the system.
LABCONCO MANUFACTURES EXHAUST BLOWERS AND A BACKDRAFT
DAMPER, WHICH ARE SUITABLE FOR MOST SINGLE CABINET
INSTALLATIONS. SEE APPENDIX D.

Connecting the Cabinet to Utility Service Lines

Note: Some models have a solenoid valve connected to the service valve on the
right side, rear position. The solenoid prevents gas from flowing to the service
valve when the unit blower is off, or there is a loss of electrical power. It is the only
service valve position that can be fitted with a solenoid valve. Connect the gas
service to the solenoid valve.
The service lines (if any) should be connected to the tube fitting(s) on the outside
of the liner wall as shown in Figure 3-1. To install the tubing, follow these steps:
1. Ensure that the tubing is ¼ inch O.D., soft metal, and that the end has been
completely deburred.
2. Route the tubing from the rear of the cabinet, ensuring that it will line up with
the slot in the back of the side panel. The slot is located from 8 ¾ to 11 ¼
inches (222 to 288 mm) from the bottom of the cabinet.
Note: Make sure that the tube routing will not contact any electrical wires. DO
NOT loop service line tubing within the side panels of the cabinet.
3. Make sure that the nut on the tube fitting is loose, but do not remove it. Make
sure the tube ferrule is in the fitting.
3: Getting Started
18