Shellab SVAC9-2 - Manual (Page 11)

11 | P a g e
INSTALLATION (CONTINUED)
V
ACUUM
P
LUMBING
The SVAC9-2 oven is provided with two (2) KF-25 vacuum fittings on its main
vacuum line. The first is located on the back of the oven (Figure 2), and feeds
directly into a 1 inch (2.54 cm) port in the back of oven chamber. A vacuum
supply plumbed to this back fitting must have a control valve between the source
and the fitting.
A second KF-25 fitting plumbed to a 0.5 inch (1 cm) section of the main vacuum
line, and is located inside the cabinet beneath the oven chamber (See Figure 5).
It is intended to be plumbed to a vacuum pump mounted inside the cabinet, and
is located just above the vacuum pump mounting studs set in the cabinet floor.
The fitting is also next to the 230VAC outlet controlled by the vacuum power
switch on the main control panel, and intended to provide power to a cabinet
mounted pump.
The vacuum valve located in the recessed box on the front of the oven controls
application of vacuum generated by a pump connected to the cabinet KF-25
fitting.
Note: The cabinet front and back panels must be reinstalled and secured prior
to powering the oven. Operating the oven with one or both panels off
exposes powered electrical lines and components.
V
ENT AND
G
AS
P
LUMBING
The vent valve control on the front panel controls a 0.5 inch (1 cm) oven
chamber inlet located inside the cabinet next to the KF-25 vacuum fitting and
vacuum line. A cylinder of a neutral purging gas such as, nitrogen or argon, may
be connected to the venting inlet. A gas line from a purging gas cylinder may be
introduced into the cabinet through the cabinet access port on the back deck of
the oven (Figure 4). Ensure that the gas line does not make contact with the
metal vacuum line as the vacuuming line may grow hot during operation.
Figure 2: KF-25 Fitting –
Back of Oven
Figure 3: Front Cabinet
Panel Removed
Figure 4: Cabinet Access
Port
– Back Deck of
Oven
Vent Valve
Control
Vent Inlet
Vacuum Pump
Power Outlet
Cabinet KF-25
Vacuum Fitting
Vacuum Power
Outlet Switch
Figure 5: Vacuum and
Vent Plumbing in the
Cabinet
Vacuum Valve
Control