Tweco 1000 CE Merlin - Manuel (Page 46)

SERVICE 5-2 Manual 0-2731
E. Coolant Level and Conductivity
1. Coolant Level
The coolant level should be checked every day at
the rear panel coolant gauge. If the coolant in the
reservoir is more than 2 inches (50 mm) from the
top of the reservoir then add Torch Coolant.
2. Coolant Conductivity
The coolant conductivity level should be checked
if the pilot doesn't start.
Check the condition of the deionizer bag in the
reservoir basket, if the bag is yellowish brown
(straw color) replace the bag and coolant (see
NOTE).
NOTE
To accurately measure the coolant conductivity it
is recommended to use a Conductivity Sensor simi-
lar to Thermal Dynamics Model TDS-73 (Catalog
# 7-2844).
F. Draining and Replacing Coolant
Remove the old coolant from the Power Supply reservoir
as follows:
1. Disconnect the coolant input hose to the Coolant
Filter Assembly at the rear panel.
2. Carefully lower the hose out the right side of the
Power Supply and drain the coolant into an ac-
ceptable container.
CAUTION
Handle and dispose of the used coolant per recom-
mended procedures.
Coolant
Hose
Coolant Hose
Connection
A-02354
Figure 5-3 Draining Coolant From Reservoir
3. Reconnect the hose to the Coolant Filter Assembly.
4. Remove Coolant Reservoir Filler Cap and install new
coolant and deionizer bag.
5.03 Common Operating Faults
Listed below are common cutting problems followed by prob-
able causes of each. If the problems are caused by a torch
problem, refer to the appropriate Torch Manual.
1. Insufficient Penetration
a. Cutting speed too fast
b. Torch tilted too much
c. Incorrect Gas Settings
d. Metal too thick
e. Worn torch parts
f. Cutting current too low
g. Non-Genuine Thermal Dynamics Parts
2. Main Arc Extinguishes
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Cutting current too high
d. Work cable disconnected
e. Worn torch parts
f. Non-Genuine Thermal Dynamics Parts
3. Excessive Dross Formation
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Worn torch parts
d. Improper cutting current
e. Improper gas selection or settings
f. Non-Genuine Thermal Dynamics Parts