O&M Manual v2
Page 23
7.
GENERATOR OPERATION
This section describes the procedure for starting, running, and stopping the nitrogen generator. The operator
should notify personnel in the area that the generator will be started and make sure the start-up will not
interfere with any other operations.
7.1
Start-Up
This section describes the necessary steps of both the initial start-up and a normal routine start-up. If this is the
first time the unit has been started, follow the Initial Startup procedure.
7.1.1
Initial Start-Up
1.
Verify that power supply is 110 V or 220 V / 1 ph / 50 - 60 Hz as labeled on the unit. You can find this
on the serial label inside the cabinet.
2.
Turn on the compressed air supply. Follow air compressor manufacturer's start-up instructions (see your
air compressor manufacturer's manual). Check that air pressure is in the range of 100-150 psig / 6.2 –
12.1 barg [620-1210 kPa]. Open the air supply valve.
**WARNING**
Shut off the main air supply valve and depressurize the generator before repairing any leaks
.
NOTE:
During the start-up sequence, check for leaks in all pipe-fittings and valves. Remember, even a small
leak on the product nitrogen piping can severely reduce production capacity!
3.
Make sure the Main Power switch is in the “OFF” position.
4.
Plug the power cord into a properly fused and grounded electrical outlet of the correct voltage as marked
on the unit.
5.
Turn Main Power switch to “ON”. Observe that the Unitronics Touchscreen is powered on. If it does not
power on, unplug from the unit from the electrical outlet and check the fuse.
6.
Observe pressure gauges on the pressure vessels for one or more cycles (3 – 5 minutes). One gauge
should be high and one low. The “High” pressure gauge indicates that particular vessel is being used to
produce Nitrogen, while the “Low” pressure gauge indicates that particular vessel is being used to relieve
other gases. Product pressure will vary with certain models based on design criteria. The “High”
pressure should reach within 5 psi of the input pressure (regulated from the air pressure regulator after the
3 filters). The “low” pressure should not be greater than 10 psi at the end of the cycle.
7.
Nitrogen will start to flow to the product tank.
8.
When Product Pressure reaches the cut-out pressure (see
), the green “Run” indicator will switch to
the amber “Standby” indicator (see
) and nitrogen production will stop. When product is used
and Product Pressure falls to the cut-in pressure, the “Standby” indicator will switch back to “Run” and
nitrogen production will resume.