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104252
OWNER’S MANUAL
Pump Rotor
(Procedure if rotor is binding)
1. Remove upper shell (see page 8).
2. Remove filter end cover screws using
5/16" nut-driver.
3. Remove filter end cover and air filters.
4. Remove pump plate screws using 5/16"
nut-driver.
5. Remove pump plate.
6. Remove rotor, insert, and blades.
7. Check for debris in pump. If debris is
found, blow out with compressed air.
8. Install insert and rotor.
9. Check gap on rotor. Adjust to .003"/
.004" (.076/.101 mm) if needed (see
Figure 19).
Note:
Rotate rotor one full turn to insure the
gap is .003"/.004" (.076/.101 mm) at tight-
est position. Adjust if needed.
10. Install blades, pump plate, air filters,
and filter end cover.
11. Replace fan guard and upper shell.
12. Adjust pump pressure (see page 9).
Note:
If rotor is still binding, proceed as
follows.
13. Perform steps 1 thru 6 above.
14. Place fine grade sandpaper (600 grit)
on flat surface. Sand rotor lightly in
“figure 8” motion four times (see Fig-
ure 20).
15. Reinstall insert and rotor.
16. Perform steps 10 thru 12 above.
Figure 17 - Rotor Location, 20,5 kW (70,000 Btu/Hr) Model
Figure 20 - Sanding Rotor
.003"/.004"
(.076/.101 mm) Gap
Measured With
Feeler Gauge
Figure 19 - Gap Adjusting Screw
Locations
Figure 18 - Rotor Location, 29,3 kW (100,000 Btu/Hr) Model
Insert
Blade
Rotor
Pump Plate
Filter End
Cover
Air Intake
Filter
Air Output
Filter
Pump
Plate
Insert
Rotor
Blade
Filter End
Cover
Air Intake
Filter
Air Output
Filter
Fan Guard
Fan Guard
Gap Adjusting Screw
Rotor
Gap
Adjusting
Screw
Blade
Sandpaper
SERVICE
PROCEDURES
Continued
Continued