Hepa Filters; Fan Shaft Bearing Removal - Carrier Aero 39MN Series Installation, Start-Up And Service Instructions Manual

LEG
(4 REQUIRED
PER FRAME)
LATCH
(4 REQUIRED
PER FRAME)
FRAME
HEPA FILTER
Height Width B Depth
Type
A (in.) (in.) (in.)
24 24 11 1 / GALV
2
12 24 11 1 / GALV
2
1
24 24 11 / SS304
2
12 24 11 1 / SS304
2
NOTES:
1. Filter sizes are 5 / -in. smaller than frame sizes.
8
2. 12-in. x 24-in. frame may be rotated for 24-in. x 12 in. arrangement;
5 5
12 / in. x 24 / in. frame may be rotated for 24
8 8
arrangement.
3. Recommended RTV sealant: GE128.
4. Filter bracket latch part numbers are 3062007-001 (galvanized) and
3062007-002 (stainless steel).
5. Filter bracket leg part numbers are 3061991-001 (galvanized) and
3061991-002 (stainless steel).
Fig. 183 — Puro Frame, HEPA Holding Frame,
Sizes 03 to 06
1
DETAIL D
AIR FLOW
Fig. 184 — HEPA Holding Frame, Sizes 72 to 110
AIRFLOW
HEPA FRAME
Height Width
Part No.
(in.) (in.)
3061975-001 24 5 / 24
8
3061983-001 12 5 / 24
8
5
3061975-002 24 / 24
8
3061983-002 12 5 / 24
8
5 5
/ in. x 12
8
DETAIL D
AIR FLOW

Fan Shaft Bearing Removal

1. Isolate the unit from the system by closing dampers to
prevent "pin wheeling." Tie off the fan wheel to pre-
vent rotation.
2. Lock open and tag electrical disconnect.
3. Enter through fan section access door or remove pan-
els as required.
4. Loosen motor base to frame bolts. Adjust motor to re-
lease belt tension and remove belts. Do not stretch
belts over sheaves. Damage to belts can result.
5. Remove bolts on bushing of fan shaft sheave, insert
bolts in jacking hole provided on bushing and slowly
jack bushing from sheave. Remove bushing and
sheave.
6. Loosen bearing holddown bolts, block shaft up.
7. Loosen bearing setscrews and locking collar, and re-
move holddown bolts.
NOTE: To facilitate easy removal of setscrew fastened
wheels, sheaves, or bearings, remove the setscrew com-
pletely. Taking care not to damage threads, insert a flat
ended drift or punch, tap lightly and carefully return the
material displaced on the shaft by the setscrew to its origi-
nal place.
8. Remove bearing while observing the following pre-
5 /
cautions:
8
5 /
8
a. Make certain fan shaft surface is not rough or
5
/
8
scored. If so, clean up surface with fine emery
5 /
8
cloth.
b. Add a few drops of oil after cleanup of shaft end.
/ in.
8
It should not be necessary to drive a new bearing onto
shaft. If light tapping is needed, do not tap against outer
race. Equipment damage may result.
9. Check fan shaft diameter at bearing mount. If worn by
more than 0.001 in. below nominal, shaft should be re-
placed.
10. Install new bearing, tighten holddown bolts, and then
tighten bearing locking collar or setscrews.
11. Make certain fan wheel does not rub sides of fan hous-
ing after installing new bearings.
12. Recoat fan shaft with a rust inhibitor or grease.
AIR FLOW
13. Replace sheave and belts. Adjust and align as de-
scribed in Installation, Sheaves and V-Belts sections.
14. Replace access panels.
15. Restore electrical power.
196
CAUTION