Bulletin TI-N214H
Installation, Operation, and Maintenance
N2-14, N2-22, N2-35, N2-14A, N2-22A, N2-35A Parker Balston Nitrogen Generators
www.parker.com/fns/balstonlabgasgenerators
8
1-800-343-4048
Plug the power cord into the power receptacle of the generator, and plug the opposite end into a
nearby wall outlet with earth ground protection. (
Note:
There is no power switch on the generator.
The oxygen analyzer is energized when the generator is plugged in.)
The inlet and outlet connections to the Parker Balston Nitrogen Generator must be checked for
leaks prior to system start-up. After the system is properly installed and checked for leaks, the inlet
gate valve can be opened to introduce compressed air to the system.
During start-up and adjustment of the system, the nitrogen produced by the unit will be of variable
purity. If the application for the nitrogen is critically dependent on purity, the nitrogen produced dur-
ing start-up or adjustment should be vented.
If the outlet nitrogen flow is closed, the system will still consume compressed air. The inlet air is
simply vented to atmosphere through the permeate ports of the membrane module.
Startup
Operation: Calibration
(Models N2-14A, N2-22A and N2-35A only)
The customer is responsible for the circuitry utilizing these relay outputs and should
use good engineering safety practices in the design of this circuitry.
1
Strip all connecting wires to 1/4” to 3/8” (6mm to 9mm) using wire strippers.
2
Insert small screwdriver into the hole below the wire connection point and
press to open connector.
3
Slide the stripped wire end into the connection port until it “bottoms out”.
4
Remove the screwdriver to clamp the wire into the connection port. Pull the
wire gently to test integrity of the connection. Repeat this procedure from step
2 if the wire releases easily.
5
Thread wires through electrical access opening on right side of generator (see
Figure 1).
CAUTION: the oxygen analyzer will not provide accurate readings unless calibrated on a
regular basis.
The oxygen analyzer is calibrated prior to shipment; however, Parker Balston strongly recom-
mends re-calibrating the unit prior to initial start-up. After the initial start-up, the analyzer should
be calibrated on a bi-weekly basis until a suitable schedule is determined, based upon the level of
accuracy required by the application.
There are two methods of calibrating the oxygen analyzer: the two point method and the single
point method. In the two point method, the first point in the calibration range is set to zero using
a zero gas (zero percent oxygen), and the second point in the range is set to a known percentage
of oxygen using a span gas (known quantity of oxygen, per gas supplier) or compressed air (20.9%
oxygen). In the single point method, only one point in the calibration range is set, using either span
gas or compressed air. Maximum accuracy in oxygen concentration monitoring will be achieved if
the oxygen concentration in the span gas is within the range of the expected oxygen concentration
in the process stream and the pressure of the gas closely approximates the pressure of the nitrogen
gas (See Figure 3 for calibration controls).
Oxygen analyzer readings should be checked and the analyzer re-calibrated on a routine basis. If
the nitrogen purity level falls below the desired level, re-calibrate the analyzer or adjust the flow until
the proper nitrogen purity level is reached.
The procedure for the
two point calibration method
is as follows:
1
Throw the toggle switch on the back of the unit to the upright position, toward the calibration
port.
2
Connect a tank of zero gas to the calibration port. (Gas pressure should be approximately equal
to operating pressure.)
3
Allow the zero gas to flow through the unit until the reading on the oxygen concentration display
stabilizes.
4
Adjust the Zero potentiometer until the oxygen concentration display reads zero.
5
Disconnect the zero gas from the calibration port, and connect a tank of span gas or a source of
clean compressed air (set gas pressure to operating pressure).
Oxygen Analyzer
Calibration
Two Point Calibration
Figure 7- Sample Wiring Schematic for
Alarm Relay Contacts
