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Service Fixture Installation & Service Connection
Service fixtures are not pre-installed on all models. If connecting a service line to a pre-
installed fixture, or installing a service fixture on the biosafety cabinet, follow these
instructions. The field install service fixture kit contains additional installation
instructions.
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 cabinet’s 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 tubing between the service fixture and the solenoid valve is
provided.
If service fixture is already installed, proceed to Step 9. Reference Figure 12-48
for the procedure below.
1. Remove the right or left side panel based on which side the service fixture is to
be located, as described in External Dress Panel Removal earlier in this section.
2. Identify the appropriate knockout plug on the biosafety cabinet (2 per side are
provided on standard models). Using a large, flat blade screwdriver and
hammer, remove the knockout by placing the screwdriver on the top or bottom of
the plug, strike the screwdriver with the hammer. Repeat alternating between the
top and bottom until the plug is loose enough to remove with pliers.
3. Using PTFE pipe thread tape on the male threads of the petcock valve, install the
coupling onto the male threads of the petcock valve. Tighten fully.
4. Apply a thin coat of silicone around the knockout opening on the OUTSIDE of the
cabinet wall. Apply PTFE pipe thread tape on the male threads of the coupling.
5. Insert the male threads of the coupling though the knockout opening, slide the
washer (from the OUTSIDE) over the male threads of the coupling. Install the
coupling nut hand-tight.
6. Rotate the petcock valve to position the handle as desired for user operation of
the valve. Fully tighten the coupling nut.
7. Apply PTFE pipe thread tape on the male threads of the 90 degree fitting. Install
the male threads of the 90 degree fitting into the female threads of the coupling.
Tighten fully, taking care to position the compression end of the 90 degree fitting
in the proper position to accept the customer-supplied tubing. Note: if a gas
solenoid valve is ordered, the tubing between the 90 degree fitting and the
solenoid is Labconco supplied.
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