Tweco FP-55 - Manual (Page 18)

INSTALLATION 3-2 Manual 0-2846
3.05 Primary Input Power
Connections
This power supply comes with a factory-installed input
power cable and plug designed to accept input power of
208/230VAC (±10%), 60 Hz, single phase, 39/37 amps.
1. Check your power source for correct voltage before
plugging in the unit.
2. Connect the input power cable (or close the main dis-
connect switch) to supply power to the system.
3.06 Gas Connections
A. Gas Requirements
WARNING
This unit is not to be used with oxygen (O
2
).
Gases: Single Gas - Plasma/Secondary
Compressed Air Only
Pressure: 70 psi (4.8 bar)
CAUTION
Maximum pressure at inlet must not exceed 125
psi (8.6 bar)
Flow: Cutting - 200 standard cubic feet/hr (94.4 lpm)
Gouging - 230 scfh (108.5 lpm)
B. Checking Air Quality
To test the quality of air, place the RUN/SET 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. Connecting Gas Supply to Unit
The gas supply is connected to the Pressure Regulator/
Filter Assembly located 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. If an optional air line filter is to be installed, refer to proce-
dures in subsection 3.06-D.
2. Connect the gas line to the inlet port. The illustration shows
typical fittings as an example. Other fittings may be used.
Install the fittings and tighten.
NOTE
For a secure seal, apply thread sealant to the fit-
ting threads, according to manufacturer's instruc-
tions. Do Not use teflon tape as a thread sealer as
small particles of the tape may break off and block
the small gas passages in the torch.
A-02783
Hose Clamp
1/4 NPT to 1/4"
(6mm) Fitting
Regulator/Filter
Assembly
Inlet Port
Gas Supply
Hose
Plastic
Bowl
Figure 3-1a Gas Connection to Regulator/Filter
Assembly (units with type A Regulator/Filter)
Art # A-02999
Hose Clamp
1/4 NPT to 1/4"
(6mm) Fitting
Regulator/Filter
Assembly
Inlet Port
Gas Supply
Hose
Bowl
Figure 3-1b Gas Connection to Regulator/Filter
Assembly (units with type B Regulator/Filter)