Tweco CE PAK Master 150XL Without Latch Circuit - Manual (Page 42)

SERVICE 5-2 Manual 0-2696
D. In-Line Coolant Filter Assembly Cleaning
The In-line Coolant Filter Screen should be cleaned periodi-
cally. To gain access to the In-Line Coolant Filter Assembly
remove the right side panel (when viewed from the front of
unit). Remove the Filter Screen by unscrewing the Filter Holder
from the In-Line Coolant Filter Assembly. Clean the Filter Screen
by rinsing with hot soapy water. Remove soap residue by
rinsing with clean hot water. Be sure that all the soap has been
removed and the screen is dry of water before re-installing in
the In-Line Coolant Filter Assembly.
A-02153
Filter Holder
Filter
Figure 5-2 In-Line Filter Assembly
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 reser-
voir 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 reser-
voir 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 such
as 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. Remove the right side panel from the Power Supply.
2. Disconnect the coolant input hose to the Coolant Fil-
ter Assembly.
3. Carefully lower the hose out the right side of the Power
Supply and drain the coolant into an acceptable con-
tainer.
CAUTION
Handle and dispose of the used coolant per rec-
ommended procedures.
A-02154
Coolant
Input Hose
Coolant
Filter
Assembly
Coolant
Reservoir
Place hose in
bucket to drain
Figure 5-3 Draining Coolant From Reservoir
4. Reconnect the hose to the Coolant Filter Assembly.
5. Remove Coolant Reservoir lid and install new coolant
and deionizer bag.
6. Reinstall the right side panel.