Tweco 1000 Merlin(Sept1999) - Manual (Page 23)

Manual 0-2731 19 INSTALLATION PROCEDURES
possible to the power supply. The work table should
be connected to the same earth ground as the power
supply.
NOTE
A properly installed ground rod will have a resis-
tance of one ohm or less.
2. Connect the control device (CNC) to a separate earth
ground similar to the ground rod described above.
The ground cable should be at least 12 gauge wire.
3. To minimize RF interference, position torch leads as
far as possible (at least 1 ft or 0.3 m) from any CNC
components, drive motors, control cables, or primary
power lines.
4. Keep torch leads clean. Dirt and metal particles bleed
off energy, which causes difficult starting and in-
creased chance of RF interference.
5. The work cable must have a solid connection to the
workpiece or cutting table (see NOTE). The connec-
tion must be free from dirt, grease, oil and paint.
NOTE
The work lead must be connected directly to the
workpiece or cutting table. DO NOT connect to
the ground rod and then to the workpiece or cut-
ting table.
3.08 Filling Power Supply Coolant
The ambient temperature of the environment where the
Power Supply will be located determines the coolant to
be used. The Standard Torch Coolant supplied with the
system can be used in ambient temperatures down to
10° F (-12° C).
Optional Super Torch Coolant should be used in areas
where the ambient temperature drops down to -34° F
(-36° C).
CAUTION
Use only Thermal Arc Torch Coolant. Use of any
other coolant can result in torch damage, insuffi-
cient thermal protection, and/or pilot arc interfer-
ence.
1. Locate the coolant deionizer bag and remove from
the plastic shipping bag.
2. Remove the coolant filler cap from the reservoir at
the rear of the Power Supply.
Coolant Reservoir
Filler Cap
Deionizer
Bag
Basket
Coolant
Reservoir
A-02352
Rear
Panel
Figure 3-9 Coolant Reservoir
3. Carefully pour enough of the supplied Thermal
Arc Torch Coolant into the reservoir to fill it.
4. Reinstall the reservoir coolant filler cap.
5. After the complete system has been installed do
the following procedure to make sure the coolant
has been pumped through the system (see NOTE):
NOTE
Depending on the length of the torch leads ordered
with the system more coolant may need to be added
after turning ON the system for the first time.
a. Place the ON/OFF Switch to ON.
b. After about 10 seconds the system will shut
down (see NOTE).
NOTE
DO NOT allow the pump to operate for more than
10 seconds the first time the system is turned ON.
c. Place the ON/OFF switch to OFF.
d. After 10 seconds place the ON/OFF switch to
ON again.
e. Repeat steps ‘b’ through ‘d’ until the system no
longer shuts down. Depending on the length
of the torch leads this sequence may need to be
done three to five times.