YZ Systems NJEX 7300L, Instructions & Operating Manual, Page: 83 / 126

YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 73 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
Low Pressure Relief Adjustment
The overflow protector incorporates a low pressure relief
in the cap assembly for the purpose of maintaining the
maximum expansion tank pressure at 25 psi (1.72 Bar).
To test and adjust follow these steps:
1. With valve V6 open, figure 227, slowly open valve
V4, figure 226, until gas begins discharging at
exhaust port.
2. Close valve V4 and see where pressure stabilizes
which should be 25 psi (1.72 Bar).
3. If adjustment is needed:
a) First, loosen adjustment lock nut, located on top
of the overflow protector. To increase pressure
in the tank, turn the adjustment screw in, or to
the right. To lower pressure tank, turn the
adjustment screw out, or to the left.
b) Tighten lock nut.
c) Repeat until the desired pressure of 25 psi
(1.72 Bar) is obtained as described in in step 2
above.
Figure 226
Figure 227
Adjustment
lock nut
Adjustment screw
Valve V6