Table of Contents
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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
24
24
11
/
SS304
1
2
12
24
11
1
/
SS304
2
NOTES:
1. Filter sizes are
/
-in. smaller than frame sizes.
5
8
2. 12-in. x 24-in. frame may be rotated for 24-in. x 12 in. arrangement;
12
5
/
in. x 24
5
/
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. 204 — Puro Frame, HEPA Holding Frame,
Sizes 03 to 61
1
DETAIL D
AIR FLOW
Fig. 205 — HEPA Holding Frame, Sizes 72 to 110
AIRFLOW
HEPA FRAME
Height
Width
Part No.
(in.)
3061975-001
24
5
/
8
3061983-001
12
5
/
8
3061975-002
24
/
5
8
3061983-002
12
5
/
8
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 prevent
rotation.
2. Lock open and tag electrical disconnect.
3. Enter through fan section access door or remove panels as
required.
4. Loosen motor base to frame bolts. Adjust motor to release
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 remove
holddown bolts.
NOTE: To facilitate easy removal of setscrew fastened wheels,
sheaves, or bearings, remove the setscrew completely. 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 original place.
8. Remove bearing while observing the following precau-
tions:
(in.)
a. Make certain fan shaft surface is not rough or scored.
24
5
/
8
If so, clean up surface with fine emery cloth.
24
5
/
8
24
/
5
d. Add a few drops of oil after cleanup of shaft end.
8
24
5
/
8
It should not be necessary to drive a new bearing onto shaft. If
5
/
in.
8
light tapping is needed, do not tap against outer race. Equip-
ment 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 housing
after installing new bearings.
12. Recoat fan shaft with a rust inhibitor or grease.
13. Replace sheave and belts. Adjust and align as described in
Installation, Sheaves and V-Belts sections.
AIR FLOW
14. Replace access panels.
15. Restore electrical power.
226
CAUTION
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