Parker Hannifin Corporation
Industrial Gas Filtration and Generation Division
Haverhill, MA
• 1-800-343-4048
Parker Zero Air Generators
Models HPZA-3500, HPZA-7000, HPZA-18000, HPZA-30000
Bulletin TI-HPZA-3500H
Recommended
Accessories
Pressure Regulator -
To control the supply air pressure to the Zero Air Generator, a pressure
regulator is needed. The
72-130-V883 Pressure Regulator
is a pressure regulator with
½” NPT inlet
and outlet ports, assembled with a pressure gauge. For more information, please contact your local
representative and request the Gas Management Supplies Catalog.
Flow Controller -
If the output capacity of the Zero Air Generator is exceeded, the hydrocarbon
content of the emergent gas may not meet specified levels. To ensure zero air purity, install a flow
controller designed for high purity applications downstream from the generator (if one is not
integral to the GC design). The
Parker Balston W-FM Flow Controllers
provide accurate flow
rate control of the zero air stream. To determine which flow controller best meets the needs of the
application, please contact your local representative and request the Gas Management Supplies
Catalog.
76080 Halogenated Hydrocarbon Scrubber -
If the compressed air supply to the generator is subject
to contamination from halogenated hydrocarbons, install a halogenated hydrocarbon scrubber directly
upstream from the generator. Exposure of the generator to halogenated hydrocarbons will damage the
catalyst module and void the warranty. For additional information, request the Analytical Gas Supplies
catalog from your local representative.
Operation
Figure 5 - Front Panel Display
Start-up
Open the inlet compressed air supply valve (customer supplied, see Installation section) and adjust
the inlet pressure to be between 40 psig and 125 psig (2.8 barg and 8.6 barg) using a (customer
installed) pressure regulator. Adjust the outlet flow using a (customer installed) flow controller. Set the
flow to the required flow rate for the instrument or application (see Specifications section at the end of
this bulletin for generator flow capacities).
Check delivery system for leaks.
Finally, turn the
generator on using the power switch on the right side of the unit.
During the 45-minute warm-up, the yellow
“Start-Up” LED will remain illuminated, and the yellow
“THC” LEDs will illuminate sequentially until the generator reaches the specified hydrocarbon removal
level. After the warm-up period, the green
“THC” LEDs will illuminate, showing a hydrocar bon level of
<0.1 ppm. At this point, the Parker Zero Air Generator is ready to be brought online and supply zero-
grade air to downstream analytical equipment.
Note:
If the
“Start Up” LED goes dark, and the green “THC” LEDs do not illuminate, the yellow
“Overflow” LED will illuminate. This indicates a downstream zero air demand which exceeds the
capacity of the generator. Please see the Troubleshooting section at the end of this bulletin.
