Labconco Total Exhaust Biological Safety Cabinets 30368 Series - Manual (Page 18)

Chapter 3: Getting Started
Product Service 1-800-522-7658 12
Original instructions
Connecting the Biosafety 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. 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.
Look inside the fitting to make sure the tube ferrule is there.
4. Push the tube into the fitting until it is properly seated. The tube will go
approximately ¾ inch (19 mm) into the fitting.
5. Tighten the tube fitting nut hand tight and then, using a 7/16-inch wrench,
tighten it at least ¾ turn more.
6. Close the service valve in the biosafety cabinet and then slowly open the
shutoff valve on the service valve. Test all fittings for leakage. Tighten
the tube nut slightly if needed.
Tube fitting nut
Tube fitting
Figure 3-1