Delta PCS100 Maintenance Manual page 66

Removing a Heat Exchanger
1. Open the front door. See "Opening a Front Door" on page 20. Make sure the front door is fully
opened to allow for unrestricted access to the heat exchanger.
2. Take off the grounding wire by removing the screw securing one end of it.
3. Then locate the other end and remove the hexagonal nut securing that end.
4. Remove the grounding wire and place it in a clean work surface.
Maintenance Manual
Figure 70. Disconnecting a Grounding Wire
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Maintenance