Tweco PakMaster 50XL Plus - Manual (Page 20)

SECTION 3: INSTALLATION PROCEDURES 14 Manual 0-2744
a. Locate the ground stud and remove the top nut
and washer.
b. Install a lug terminal on the ground wire.
c. Place the ground wire onto the ground stud
and secure with the nut and washer.
d. Insert the other two wires into the L1 and L2
terminals on the contactor.
e. Tighten all set screws.
AC Input
Power Cable
L1
L2
GND
Input Contactor
A-01330
Figure 3-5 Primary Power Cable Connections -
Single-Phase Operation
3.08 Gas Connections
A. Gas Requirements
WARNING
This unit not to be used with oxygen (O
2
).
Gases: Compressed Air or Nitrogen (N
2
) Only
Pressure: 70 psi (4.8 bar)
CAUTION
Maximum input gas pressure must not exceed 125
psi (8.6 bar)
Flow: Cutting - 200 scfh (94.3 lpm)
Gouging - 230 scfh (108.5 lpm)
B. Checking Air Quality
To test the quality of air, place the RUN/SET/LATCH
switch to SET position, place a welding filter lens in front
of the torch and turn on the gas. Any oil or moisture in
the air will be visible on the lens. Do not initiate an arc!
CAUTION
Air supply must be free of oil, moisture, and other
contaminants. Excessive oil and moisture may
cause double-arcing, rapid tip wear, or even com-
plete torch failure. Contaminants may cause poor
cutting performance and rapid electrode wear.
C. Gas Connections
The gas supply is connected to the Pressure Regulator/
Filter Assembly installed on the rear of the unit. The con-
nection is the same for compressed air or high pressure
gas cylinders.
Connect the gas supply as follows:
1. Locate the 1/4 NPT to #4 (6mm) hose barb fitting
shipped inside the Torch Spare Parts Kit.
2. If an optional air line filter is to be installed, refer to
subsection D.
3. Install the supplied barb fitting as shown below.
4. Tighten the barb fitting.
5. Place an adjustable hose clamp (customer supplied),
1/4" (6.4mm) to 5/8" (15.9mm)) over the gas supply
hose.
Regulator/Filter
Assembly
1/4 NPT to #4 (6mm)
Hose Fitting
#4 (6mm) Gas
Supply Hose
Hose Clamp
A-00916
Figure 3-6 Gas Connection To Regulator/Filter
Assembly