Product Service 1-800-522-7658
54
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
