Tweco Merlin 6000 Master PS - Manual (Page 28)

INSTALLATION PROCEDURES 3-10 Manual 0-2568
4. Set the SECONDARY selector switch on the front
panel of the Power Supply to the WATER position.
D. Plasma and Secondary Gases With
Optional Gas Control
The required plasma and secondary gases are connected
to the rear of the Power Supply. The secondary selection
switch on the front panel of the Power Supply must al-
ways be set to GAS for all secondary gases when the Gas
Control Option is installed. The type of gas to be used
will be selected at the Gas Control Option front panel.
NOTE
If compressor shop air is to be used as the plasma
gas the line must be filtered.
If using shop air as one of the plasma gases then install
the optional Two Stage Air Line Filter per the following
procedure:
NOTE
Use these instructions only for Power Supplies that
HAVE
the Gas Control Option installed.
1. Remove the air supply input hose from the Plasma
Gas (Air) Input Fitting at the rear of the power sup-
ply, if already installed.
2. Locate the two mounting studs on the rear of the unit
and secure the Air Filter Mounting Bracket to the panel
using the two 10-32 Nylon Locking Nuts provided.
Air Filter
Mounting Bracket
Mounting
Nuts
Mounting
Studs
A-01336
Figure 3-12 Air Filter Mounting Bracket Installation
3. Place thread sealer on the threads of the 1/4 NPT
Street Elbow (see NOTE).
NOTE
Do Not use teflon tape as a thread sealer as small
particles of the tape may break off and cause the
small gas passage to be blocked in the torch.
4. Install the supplied 1/4 NPT Street Elbow into the
input port (IN) of the Air Line Filter Assembly.
5. Slide the Air Line Filter Assembly into the mounting
bracket. The Filter Assembly will snap into place.
A-01339
1/4 NPT
Elbow
Air Filter
Assembly
Air Filter
Mounting
Bracket
OUTPU T OUTPUT TO TO CON TROL CONTROL
MOD ULE MODULE
AIR AIR PLAS MA PLASMA
INPU T INPUT
N2 PLAS MA PLASMA
INPU T INPUT
O2 PLAS MA PLASMA
INPU T INPUT
PLAS MA G AS PLASMA GAS
Ar/H Ar/H 2 PLAS MA PLASMA
INPU T INPUT
Hose
Assembly
Filter to
Plasma
Gas Input
Gas Control
Plasma Gas
Input Fitting
Figure 3-13 Supply Hose Connections With Gas
Control Option
6. Place thread sealer on the threads of the connectors at
both ends of the Filter to Plasma Input Gas Hose As-
sembly (see NOTE).
NOTE
Do Not use teflon tape as a thread sealer as small
particles of the tape may break off and cause the
small gas passage to be blocked in the torch.
7. Connect the Filter to Plasma Input Gas Hose Assem-
bly to the output port (OUT) of the Air Line Filter
Assembly and to the Air Plasma Input Fitting on the
Gas Control Manifold.
8. Place thread sealer on the threads of the Street Elbow
on a Y-Hose Assembly (see NOTES).
NOTES
Do Not use teflon tape as a thread sealer as small
particles of the tape may break off and cause the
small gas passage to be blocked in the torch.
The Y-Hose Assembly is customer supplied and is
shown to illustrate one method of connecting the
customer's air supply.