Viking Pump UDF400: DFO Start-UP Guide - Manual (Page 7)

Viking Duplex Fuel Oil Package
Field Start-Up Guide
Bulletin:
Issue:
Page:
UDF400
2-Oct-06
6
Setting the Pressure Relief Valves
1. Turn the “Hand-Off-Auto” switches to “OFF” for both P1 and P2.
2. Remove the cap (item J) of the
pressure relief valve for pump P1.
3. Loosen the lock nut (item F)
4. Turn the adjusting screw (item C)
clockwise to increase the pressure
setting or counterclockwise to
decrease the pressure setting
5. Tighten the lock nut (item J)
6. Reinstall the cap (item B) onto the
valve.
7. Turn the “Hand-Off-Auto” switch for
P1 to “HAND” position.
8. Slowly close the discharge ball valve
for P1. If the pressure relief setting is
not satisfactory repeat the operation t
adjust the adjusting screw.
o
loat
9. Repeat steps 1 to 8 for pump P2.
FLOAT CONTROLS
The standard duplex control panel contains NC relays to operate three f
switches (switches supplied by others) for the day tank. If more than three
floats are required, the control panel would have to be ordered with
optional NC relays.
The top float (FL3) stops both pumps, the middle float (FL2) starts the lead
pump and the bottom float (FL1) starts the lag pump.
It may not be practical to fill the day tank to test the operation of the panel. A simpler way is to have the
electrician simulate the open and closing contacts of the floats to check the operation sequence. This
procedure can be used to check the high and low level alarms (if supplied) in the panel. The electrician
can check the conductivity of the float (normally open or normally closed) to see if they are the same as
specified. In some cases there is no day tank and the pump duplex unit pumps directly into the diesel
generator or boiler. The panel will receive the signal from the generator and start the lead pump.
VIKING PUMP, INC. • A Unit of IDEX Corporation • Cedar Falls, IA 50613 USA
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