Hardinge Talent 10/78, Maintenance Manual

Page: 59 / 104

CLEANING THE POWER CASE HEAT EXCHANGER AIR FILTER
The power case is cooled by a heat exchange system. The heat exchanger provides the cooling
and environmental protection necessary for proper operation of the printed circuit boards. This air
unit employs a closed loop design which circulates air inside the power case while sealing out
potentially contaminated, external air.
The heat exchanger is located either on the door exterior or near the top of the power case. Air is
moved inside the power case while external air is drawn across the corrugated metal (heat
exchange) plate. It is recommended that air filter “L”, Figure 6.10, be cleaned once a week.
1. Power down the machine. Refer to the appropriate power-down procedure in Chapter 1.
2. Clean the power case heat exchanger air filter as follows:
A) Use the tab on the filter to lift the air filter up, slide the bottom out and pull it down to remove
the air filter from its frame.
B) Wash the air filter clean in detergent and water. Blow it out with compressed air and allow it to
air dry.
C) Make certain that the air filter is dry; put the filter, with tab down, up into the top of its frame,
press it in and drop it into the bottom of the frame.
3. Power up the machine. Refer to the appropriate power-up procedure in Chapter 1.
M-448B 6-9
Figure 6.10 - Heat Exchanger Air Filter
on the Power Case Door
L
TP5195