FILTER CHANGE
Warning: risk of dust dispersion - use personal safety equipment
Unhealthy dust can be spread during filter change. Accordingly, the user should wear
protectiveglasses, protective gloves, and a breathing mask conforming to protection
class FFP3
Switch off the machine and pull the plug out of the socket.
PREFILTER (LARGE)
Stock # 3474-20090050
1. Loosen the 3 clamps and remove the top.
2. Lift out the filter.
3. Insert new filter. Only filters purchased from National may be used.
HEPA FILTER (SMALL)
Stock# 3472-20070007
1. Loosen the two nuts on the filter cap.
2. Carefully lift the filter into a clean plastic bag.
NOTE: T
HIS BAG MUST BE PROPERLY DISPOSED OF
.
3. Insert a new filter in reverse order.
4. Check the seal when changing filters and changing defective seals.
PURGE VAC
To maximize airflow operator must periodically purge machine!
A
S
A
IRFLOW
L
ESSENS FOLLOW PURGING INSTRUCTION BELOW
:
1. Shut off vac.
2. Remove vacuum hose from hose inlet (Ref 2).
3. Cover hose inlet with plastic cap suspended from machine (Ref 2).
Note:
If plastic cap is not available, carefully cover inlet with the
palm of your hand. Use proper safety equipment!
4.
TURN VAC ON
.
5. Slowly press handle valve a minimum of 3-4 times to engage jet
pulse/purge (Ref 3).
6. Turn vac off.
7. Remove plastic cap from inlet.
8. Connect vacuum hose to inlet.
Page 10
PROCEDURES
Ref 2
Ref 3
Note: See page 13 for additional
filter trouble shooting
