LTPS-UM-8007-01, Issue 1
Appendix A - Maintenance
SPX-CABFIN01, SPX-CABFIN04
November 9, 2001
61
H
EAT
E
XCHANGER
M
AINTENANCE
The heat exchanger air intakes, at the louvers at the cabinet base, are protected by screens.
The heat exchanger fans are designed to operate for years without routine maintenance. To replace a failed fan
unit (top or bottom), first remove the heat exchanger (Step 1 through Step 7). Replace the top fan assembly (Step
1 through Step 8) or bottom fan assembly (Step 1 through Step 6), and reinstall the heat exchanger (Step 1 through
Step 7).
Removing the Heat Exchanger
1
Locate and disconnect the bottom fan power connector as shown in
2
Release the two draw latches at the top left and right sides of the heat exchanger. The heat exchanger will
drop about one-half inch.
3
Release the two draw latches at the bottom left and right sides of the heat exchanger.
4
Release all latches from the top and bottom locking clips. The hanging bracket near the top of the heat
exchanger can be used to hang the heat exchanger on the end chamber door.
It is recommended that the screens be inspected and cleaned semi-annually or at the intervals
prescribed by local practices.
Before beginning top or bottom fan replacement, disconnect power at the fuse and alarm panel
by removing the auxiliary fuse labeled FAN H.E. on the fuse and alarm panel door.
Be careful to avoid the draw latches; the handles will snap open when released.
