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
Filter Cartridge
Replacement
Catalyst Module
Maintenance
The Grade DX and Grade BX prefilters integral to the Parker Zero Air Generator are located on the right
side of the generator, behind the removable panel (see Figure 6). The filter cartridges inside the prefilter
housings should be changed on an annual basis to maintain efficient operation of the system. The filter
cartridges housed in the prefilters are removed by unscrewing the collar from the head of the filter
assembly, lowering the bowl of the assembly, and removing the element retainer disc at the base of the
cartridge. Insert the new filter cartridges (100-12-DX and 100-12-BX) and re-assemble in reverse order.
(
Note:
The filter housings are labeled for Grade DX and Grade BX filter cartridges. Please install
replacement cartridges in the correct housing.)
The final membrane filter in the Parker Zero Air Generator is also easily accessible from the right side of
the unit. The membrane filter should also be changed each year, or as needed to maintain flow and
minimize pressure drop. The membrane filter cartridge is removed by unscrewing the filter bowl from
the filter head and sliding the spent cartridge off the support core. Replace the GS membrane cartridge
(GS-050-05-95) and re-assemble.
The time required to service all three stages of filtration integral to the Parker Zero Air Generator is
approximately 15 minutes.
To prevent electrical shock, disconnect the generator from the power supply prior to ser vicing the
catalyst module.
Allow unit to cool for at least 2 hours before removing the cover to service the catalyst module.
The catalyst module in the Parker Zero Air Generator should be changed (when the
“Check System”
LED is illuminated or blinking) to maintain the hydrocarbon removal specification for the unit. Contact
the local representative for ordering information and pricing for a replacement catalyst module.
The tools required to change the catalyst module are a Phillips head screwdriver, an 11/32
” nut driver,
and two 7/16” or adjustable wrenches. The procedure for replacing the catalyst module is as follows (see
Figure 6 for component locations):
1
Switch off the power to the unit, unplug from the power receptacle, close the (customer
installed) inlet air valve, and allow the unit to cool (2 hours, minimum) and depressurize.
2
Remove the cover from the Zero Air Generator.
3
Using two wrenches (one as an anchor), disconnect the module inlet and outlet fittings at the
elbow.
Leave both elbows on the module
(see Figure 6).
4
Remove the washer and kep nut (11/32
”) at the base of the module.
5
Remove the spent module from the Zero Air Generator and disconnect the electrical connector
and the PCB connector (see Figure 6).
Figure 6
– Maintenance Items
100-12-BX COALESCING
FILTER CARTRIDGE
100-12-DX COALESCING
FILTER CARTRIDGE
