Operation & Maintenance; Set-Point Adjustment - Dungs FRI Serie Notice De Fonctionnement

Operation & Maintenance
Start-Up
• The inlet and outlet shut off valves should both be closed.
Quickly opening the inlet manual shutoff valve
can permanently rupture the internal, balanc-
ing diaphragm.
• Slowly open the inlet manual shutoff valve just enough to
allow inlet pressure to gradually build up to the inlet of the
regulator until the system is fully pressurized.
• Slowly open the outlet shut off valve(s) to allow a small flow.

Set-Point Adjustment

1) Remove the black adjusment cover.
2) To increase the outlet pressure set point, turn the adjust-
ment spindle clockwise with a screw driver.
3) To decrease the outlet pressure set point, turn the adjust-
ment spindle counterclockwise with a screw driver.
4) Always use an accurate pressure gauge connected down-
stream from the regulator to measure the actual outlet
pressure.
5) Re-install black adjustment cover.
6) After adjusting the set point for normal operation verify that
the gas pressure regulator operates as intended.
During start-up, a pressure gauge must be used
to read the setpoint of the regulator ourlet pres-
sure. After the safety shutoff valves are closed, the
outlet pressure must not exceed the setpoint by more
than 30 %. If the outlet pressure exceeds 30 % of the
setpoint, see section on page 2 for lock-up pressure.
While adjusting the outlet pressure of the regu-
lator, confirm that adjusting the outlet pressure
does not create a hazard to the burner.
Outlet Pressure Spring Replacement
Head Injury Risk:
Never have head above or near the aluminum
cap when removing regulator spring. The spring ten-
sion can be high enough to rapidly eject the aluminum
cap with a large force.
1. Remove the black adjustment cover.
2. Release spring tension by turning the adjustment spindle
completely counterclockwise with a screwdriver.
3. Remove the aluminum cap.
4. Remove existing spring and insert new spring.
5. Re-install adjustement spindle and adjust to desired outlet
pressure. Follow the setpoint adjustment instructions.
6. Re-install the adjusment cover, and apply the new outlet
pressure label provided with new outlet pressure range
onto the name plate.
7 ... 10
Filter
• Inspect the filter at least once a year.
• Replace the filter if the pressure drop across the filter is
more than 4" W.C.
• Replace the filter if the pressure drop across the filter is
more than twice as high as the first installation inspection.
Filter Change
1. Remove the FRI/6 by following the mounting instructions
in reverse order.
2. Remove the support ring.
3. Remove the filter insert.
4. Insert a new filter insert.
5. Press in the support ring.
6. Re-install the FRI/6 following the mounting instructions.
7. Perform a function and leak test.
Outlet
pressure
label
Inlet Filter
Adjustment cover
Adjustment spindle
for outlet pressure
adjustment
Aluminum Cap. Turn only
to remove outlet pressure
spring
Spring
Breather
plug