YZ Systems NJEX 7300L, Инструкция и руководство по эксплуатации, Страница: 82 / 126

YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 72
NJEX 7300L ver.09042003
SSSSS
ECTION ECTION ECTION ECTION ECTION
12: 12:
12: 12:
12: S S
S S
S
Y YY Y YSTEM STEM STEM STEM STEM
M M
M M
M
AINTEN AINTEN AINTEN AINTEN AINTENANCE ANCE ANCE ANCE ANCE
Overflow Protector Assembly
Inspection
The overflow protector assembly should be inspected as
follows on each NJEX System in operation, figure 225:
1. Isolate the protector by closing valve V6 located just
below the overflow protector on the expansion tank.
2. Slowly remove the protector upper housing, item A,
by unscrewing it from the protector lower valve
body, item B.
3. Inspect the dart and o-ring seal, item C, located in
the upper body. It should not be sticky or unusually
shaped. If any distortion to this o-ring is found it
should be replaced immediately. A normal fitting o-
ring will exhibit a slight interference between the dart
and the o-ring when in contact with each other. This
contact is what causes the seal when necessary.
4. Inspect the cap to body o-ring, item D, and lubricate
or replace as necessary.
5. Inspect the reset push button. When pushed in, the
button should depress, then spring back freely. If
any sticking occurs, the o-ring, item E, should be
lubricated.
6. To reinstall the protector upper housing, first assure
that the dart is fully inserted into the housing
contacting the o-ring seal. Second, install the upper
housing onto the lower body, assuring that the cap
comes to a full seated position against the protector
lower body.
7. Depress the Reset button to reset the dart.
8. Slowly open valve V6 below the protector.
9. The Reset button on the side of the overflow
protector is utilized to test the function of the low
pressure relief and to reset the overflow dart.
Pressing this button will over-ride the low pressure
relief and the overflow protection dart.
Note: This should be inspected by the maintenance
technician on a regular basis. Caution should always be
used as odorant may escape if the expansion tank has
been allowed to filled with odorant. Odorant fill of the
expansion tank is not a normal or recommended
operating condition.
Figure 225
Valve V6
D
C
B
A
E