ESAB SC-270 WH Manual De Instrucciones página 4

4
4
OPERATION
OPERATING INSTRUCTIONS
CONNECTING
1. Attach regulators to the oxygen and fuel gas cylinders. Follow all instructions supplied
with your regulators.
2. Attach oxygen and fuel gas hoses to the regulators and to the torch handle, after making
sure all metal seating surfaces are clean. Tighten all connection nuts with a wrench.
3. Using Welding or Heating Head: Remove welding head connection nut from torch handle.
Insert welding head into handle using slight back and forth twisting motion as you push.
Slip connection nut over the head and hand-tighten to handle.
Using Cutting Attachment: Set the welding head connection nut aside and insert the
cutting attachment to the torch handle in the same manner as the welding head. Remove
nozzle nut and insert cutting nozzle into the cutting attachment head. Slip nut over the
nozzle and tighten with a wrench.
WARNING
Flashbacks can cause serious burns.
Be sure gas flow is sufficient for head or nozzle size.
Adjust regulators for proper psig pressures.
Adjust throttle valves properly.
Keep torch in good repair.
DO NOT throttle back gases to use large head or nozzle on thin material.
ADJUSTING GAS PRESSURES
Fuel Gas: With oxygen valve closed, open the fuel gas valve on the torch handle about one
turn. Turn in the pressure-adjusting screw on the fuel gas regulator until its delivery-pressure
gauge indicates the desired pressure. Then immediately close the torch fuel gas valve.
Oxygen, Using Welding or Heating Head: Open the torch oxygen valve at least 1-1/2
turns. Adjust oxygen pressure at the regulator to the desired pressure and then close
the torch oxygen valve.
Oxygen, Using Cutting Attachment: Open the torch oxygen valve WIDE and leave the preheat
oxygen valve on the cutting attachment closed. Depress the cutting oxygen valve lever on
the cutting attachment. Adjust the oxygen pressure at the regulator to the desired pressure.
Shut off the oxygen flow by releasing the cutting oxygen valve lever only.
TESTING FOR LEAKS
Every welding and cutting outfit should be thoroughly tested for leaks after it
is first hooked up, and at regular intervals thereafter. After all connections have
been made, make sure both valves on the torch handle are closed. Then turn
in the regulator pressure-adjusting screws clockwise until the oxygen delivery-
pressure gauge registers 50 psi, the fuel gas delivery-pressure gauge registers
10 psi. Using Leak Test Solution suitable for oxygen service, such as P/N 998771
(8oz. container), check for leaks at the cylinder valves, the cylinder-to-regulator
connections, the regulator-to-hose connections, and the hose-to-torch connec-
tions. If bubbling at any point indicates leakage, tighten the connection. If
this does not stop the leakage, close the appropriate cylinder valve, open the
torch valve to remove all pressure from the line, and finally release the regulator
pressure-adjusting screw by turning it counterclockwise. Then break the leaky
connections, wipe metal seating surfaces with a clean, dry cloth, and examine
them for nicks and scratches. Remake the connection(s) and retest. Do not
try to light the torch until you are satisfied that all connections are gas-tight.
4
OPERATION
OPERATING INSTRUCTIONS
CONNECTING
1. Attach regulators to the oxygen and fuel gas cylinders. Follow all instructions supplied
with your regulators.
2. Attach oxygen and fuel gas hoses to the regulators and to the torch handle, after making
sure all metal seating surfaces are clean. Tighten all connection nuts with a wrench.
3. Using Welding or Heating Head: Remove welding head connection nut from torch handle.
Insert welding head into handle using slight back and forth twisting motion as you push.
Slip connection nut over the head and hand-tighten to handle.
Using Cutting Attachment: Set the welding head connection nut aside and insert the
cutting attachment to the torch handle in the same manner as the welding head. Remove
nozzle nut and insert cutting nozzle into the cutting attachment head. Slip nut over the
nozzle and tighten with a wrench.
WARNING
Flashbacks can cause serious burns.
Be sure gas flow is sufficient for head or nozzle size.
Adjust regulators for proper psig pressures.
Adjust throttle valves properly.
Keep torch in good repair.
DO NOT throttle back gases to use large head or nozzle on thin material.
ADJUSTING GAS PRESSURES
Fuel Gas: With oxygen valve closed, open the fuel gas valve on the torch handle about one
turn. Turn in the pressure-adjusting screw on the fuel gas regulator until its delivery-pressure
gauge indicates the desired pressure. Then immediately close the torch fuel gas valve.
Oxygen, Using Welding or Heating Head: Open the torch oxygen valve at least 1-1/2
turns. Adjust oxygen pressure at the regulator to the desired pressure and then close
the torch oxygen valve.
Oxygen, Using Cutting Attachment: Open the torch oxygen valve WIDE and leave the preheat
oxygen valve on the cutting attachment closed. Depress the cutting oxygen valve lever on
the cutting attachment. Adjust the oxygen pressure at the regulator to the desired pressure.
Shut off the oxygen flow by releasing the cutting oxygen valve lever only.
TESTING FOR LEAKS
Every welding and cutting outfit should be thoroughly tested for leaks after it
is first hooked up, and at regular intervals thereafter. After all connections have
been made, make sure both valves on the torch handle are closed. Then turn
in the regulator pressure-adjusting screws clockwise until the oxygen delivery-
pressure gauge registers 50 psi, the fuel gas delivery-pressure gauge registers
10 psi. Using Leak Test Solution suitable for oxygen service, such as P/N 998771
(8oz. container), check for leaks at the cylinder valves, the cylinder-to-regulator
connections, the regulator-to-hose connections, and the hose-to-torch connec-
tions. If bubbling at any point indicates leakage, tighten the connection. If
this does not stop the leakage, close the appropriate cylinder valve, open the
torch valve to remove all pressure from the line, and finally release the regulator
pressure-adjusting screw by turning it counterclockwise. Then break the leaky
connections, wipe metal seating surfaces with a clean, dry cloth, and examine
them for nicks and scratches. Remake the connection(s) and retest. Do not
try to light the torch until you are satisfied that all connections are gas-tight.
4
LIGHTING & FLAME ADJUSTMENT
CAUTION: Use friction lighter for lighting torch. Do NOT use a match. Use of
a match can seriously burn your hand.
Welding or Heating Head (Acetylene)
1. Open fuel gas valve about 1/2 turn and light the gas at the tip.
2. Slowly close the fuel gas valve until the yellow flame just starts to throw
off smoke.
3. Open oxygen valve slowly until you have a neutral flame.
4. If harsher or soft flame is desired, readjust the two valves.
NOTE: When operating with a very soft flame, the welding head will tend to
heat up and transfer some of this heat back to the torch handle. This
may create some discomfort to the operator.
Heating Head (Fuel Gases except Acetylene)
1. Crack fuel gas valve and light the gas at the tip.
2. Open fuel gas valve until flames start to leave end of tip.
3. Slowly open oxygen valve until flames are at their shortest lengths.
4. If necessary, alternately open fuel gas and oxygen valves to the desired
flame size.
Cutting Attachment (Acetylene)
1. Open the acetylene valve on the torch handle about 1/2 turn, and light
the gas at the nozzle.
2. Slowly close the acetylene throttle valve until the yellow flame just starts
to throw off black smoke.
3. Slowly open preheat oxygen valve on cutting attachment until neutral
flames are obtained.
4. Finally, open the cutting oxygen valve by depressing lever and readjust
the neutral flames by turning preheat oxygen valve.
The flame now has the proper strength for any cutting job. With this flame,
acetylene is being consumed economically and the cutting attachment will be
operating at best resistance to flashback. If greater preheat flame temperature
is desired for faster starts or piercing, open the cutting oxygen valve and adjust
the preheat oxygen valve until the flame inner cores shorten about 10 percent
and become sharply pointed.
Cutting Attachment (Fuel Gases except Acetylene)
1. Crack the fuel gas valve and light the gas at the nozzle.
2. Open the fuel gas valve until flame starts to leave the end of the nozzle.
3. Slowly open preheat oxygen valve on cutting attachment until flame
stabilizes.
4. Depress lever to open cutting oxygen valve and then adjust preheat
oxygen valve until preheat flames are at their shortest length.
5. If larger or smaller preheat flames are desired, depress cutting oxygen
valve lever and alternately readjust fuel gas and preheat oxygen valve
to obtain the final flame setting.
SHUTTING OFF
Close the fuel gas valve first, then the oxygen valve whether you are using a
welding head or cutting attachment. However, if the cutting attachment is to
be relighted within a half-hour, you may close the preheat oxygen valve on the
attachment instead of the oxygen valve on the torch handle.
If operations are to be stopped for a half-hour or more, you should release
all pressure from regulators. To do this, first close both cylinder valves. Then
open the torch valves. Finally, back out the regulator pressure-adjusting
screws until they turn freely.
LIGHTING & FLAME ADJUSTMENT
CAUTION: Use friction lighter for lighting torch. Do NOT use a match. Use of
a match can seriously burn your hand.
Welding or Heating Head (Acetylene)
1. Open fuel gas valve about 1/2 turn and light the gas at the tip.
2. Slowly close the fuel gas valve until the yellow flame just starts to throw
off smoke.
3. Open oxygen valve slowly until you have a neutral flame.
4. If harsher or soft flame is desired, readjust the two valves.
NOTE: When operating with a very soft flame, the welding head will tend to
heat up and transfer some of this heat back to the torch handle. This
may create some discomfort to the operator.
Heating Head (Fuel Gases except Acetylene)
1. Crack fuel gas valve and light the gas at the tip.
2. Open fuel gas valve until flames start to leave end of tip.
3. Slowly open oxygen valve until flames are at their shortest lengths.
4. If necessary, alternately open fuel gas and oxygen valves to the desired
flame size.
Cutting Attachment (Acetylene)
1. Open the acetylene valve on the torch handle about 1/2 turn, and light
the gas at the nozzle.
2. Slowly close the acetylene throttle valve until the yellow flame just starts
to throw off black smoke.
3. Slowly open preheat oxygen valve on cutting attachment until neutral
flames are obtained.
4. Finally, open the cutting oxygen valve by depressing lever and readjust
the neutral flames by turning preheat oxygen valve.
The flame now has the proper strength for any cutting job. With this flame,
acetylene is being consumed economically and the cutting attachment will be
operating at best resistance to flashback. If greater preheat flame temperature
is desired for faster starts or piercing, open the cutting oxygen valve and adjust
the preheat oxygen valve until the flame inner cores shorten about 10 percent
and become sharply pointed.
Cutting Attachment (Fuel Gases except Acetylene)
1. Crack the fuel gas valve and light the gas at the nozzle.
2. Open the fuel gas valve until flame starts to leave the end of the nozzle.
3. Slowly open preheat oxygen valve on cutting attachment until flame
stabilizes.
4. Depress lever to open cutting oxygen valve and then adjust preheat
oxygen valve until preheat flames are at their shortest length.
5. If larger or smaller preheat flames are desired, depress cutting oxygen
valve lever and alternately readjust fuel gas and preheat oxygen valve
to obtain the final flame setting.
SHUTTING OFF
Close the fuel gas valve first, then the oxygen valve whether you are using a
welding head or cutting attachment. However, if the cutting attachment is to
be relighted within a half-hour, you may close the preheat oxygen valve on the
attachment instead of the oxygen valve on the torch handle.
If operations are to be stopped for a half-hour or more, you should release
all pressure from regulators. To do this, first close both cylinder valves. Then
open the torch valves. Finally, back out the regulator pressure-adjusting
screws until they turn freely.