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analyzer pressure regulator on panel until the flow reaches 2-3 SCFH by pulling out on the yellow
knob and turning clockwise to increase, and counter-clockwise to decrease pressure or flow rate.
5. The needle valve on the oxygen sample flow meter should be turned counter clockwise to open
fully. A change in main regulator set pressure may require re-adjustment.
6. Allow oxygen content reading on display to stabilize.
7. Press Mode Button until “CAL” appears in display. After releasing button, the display will
indicate an oxygen content. Press !keys to make the display agree with the Span Gas content.
8. Process may need to be repeated to fine tune.
9. When calibrated, Press MODE Key until RUN is displayed. Release MODE button.
10. Once the display settles in agreement with the span gas contents, the unit is calibrated. Switch
the 5-Way valve to the “Monitor N2 Outlet” position.
6.3
EconoMizer™ Adjustments – If system has been equipped with an energy saving EconoMizer™
control system, there are field adjustments necessary to proper operation.
6.4 Critical Adjustments –
There are certain settings and adjustments that should not be tampered
with. If these are re-adjusted without written consent of Pneumatech, Inc., all or part of the warranty
on the unit may become void.
These are the as follows:
1. Heater controller is factory adjusted for from 70-105 degrees F and should not be re-adjusted
above 110 degrees or membrane performance can decline over time. Temperature in excess of
125 degrees F will damage the membrane material.
2. High temperature safety switch has been factory set at 120 degrees and should not be re-adjusted.
3. A membrane inlet pressure switch is supplied with all units with the heater option. If pressure is
on the system there will be airflow to the heater. The pressure switch is factory set to
approximately 85-90% of the inlet pressure and should not be re-adjusted unless the inlet pressure
to the membrane is re-adjusted.
7.0 OPERATING INSTRUCTIONS
7.1 GENERAL DESCRIPTION -
Pneumatech Model PMNG Series nitrogen gas generator is a complete
system that is factory assembled, tested, and ready for service. The system requires connection to the
user’s system as described in Section 3.0.
7.2 OPERATION OF THE UNIT –
The basic standard system is manually controlled. In this system, the
user needs to follow the instructions in section 6.1, paragraphs 1,2 & 8.
1.
Manual System
– On manually controlled systems, a flow controller, located between the nitrogen
discharge manifolds, needs to be adjusted so that the system delivers the specified flow rate using
built-in flow meter.
2.
Automatic System
– On automatically controlled systems, only the oxygen content set point needs
to be adjusted. This is done on the purity controller by pressing the ! [up or down arrow] keys to
reach the desired oxygen content. All other settings in the controller have been factory set and do
not require further adjustment. The purity set point has been factory set as called out in either the
purchase order or job specifications. There is a manual by-pass valve in the event that servicing
needs to be done to the automatic valve. Simply close the isolation ball valves that supply the
automatic valve and open the ball valve that isolates the manual flow controller. If the manual
controller has been preset to the necessary flow rate or oxygen content at start-up, no further
adjustments are necessary. A small set screw adjusts the flow and uses a 3/32” allen wrench.
3.
Heater & Controls
– If the unit is supplied with a heater, it has been factory set for optimum
performance and operates automatically. Adjustments outside the specified temperature range will
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