Nova-Tech Pulsafeeder OMNI DC7 - Manual (Page 11)

11
6.3.3 Oil Changes
The recommended oil change intervals are dependent upon the operating environment and level of pump usage,
classified as follows:
Normal service: Clean/dry atmosphere, an ambient operating temperature of 0
0
C to 40
0
C (32
0
F to 104
0
F) and up to 2,000 annual operating hours.
Severe Service: Humid atmosphere, an ambient operating temperature below 0
0
C (32
0
F) or above 40
0
C (104 0 F), and over 2,000 annual operating hours.
The recommended eccentric oil change interval is two (2) years for normal service and one (1) year for
severe service. The procedure is as follows:
1. Disconnect the power source to the drive motor
2. Relieve all pressure from the piping system.
3. Remove the fill plug from the top of the pump gearbox.
4. Drain the oil by removing the drain plug on the bottom of the gearbox, opposite the stroke adjustment
knob.
5. Replace the drain plug.
6. Fill the eccentric box with PulsaLube oil as described under Gearbox Oil Fill
.
7. Replace the fill plug and double check that the drain plug is secure.
6.4 Priming the Reagent Head
1. When handling process liquids, follow all applicable personal and facility safety guidelines.
2. Ensure that the pump is ready for operation and that all process connections are secure.
3. Open the suction and discharge line shutoff valves.
4. If the piping system design and the storage tank are such that the product flows due to gravity through
the pump, reduce the discharge pressure and the system will self prime when the pump is started. In
the event the discharge line contains a significant amount of pressurized air or other gas, it may be
necessary to lower the discharge pressure to enable the pump to self-prime.
5. If the installation involves a suction lift, it may be necessary to prime the reagent head and suction
line. Operate the pump as in step 4 above, many times the pump will be capable of self priming. If it
does not begin to pump, remove the discharge valve assembly. Carefully fill the reagent head
through the discharge valve port with process (or compatible) liquid, and then reinstall the check
valve.