ZERO-AIR™ G E N E R A TO R OPERATION AND MAINTENANCE MANUAL P.O. Box 2105, 8 Executive Drive, Toms River, N.J.
Table of Contents Page # 1. Introduction………………………………………………………………………….. 2 2. Description of Components………………………………………………………. 3 2.1 Perma Pure Dryer 2.2 Ultraviolet Lamp 2.3 Activated Carbon/Alumina Mixture 2.4 Carbon Monoxide Catalyst 2.5 1µ Particulate Filter 3. Start-Up Procedure…………………………………………………………………. 4 4. Maintenance 4.1 Activated Carbon/Alumina Replacement …………………………….………5 4.2 Final Filter Replacement ……………………………………………………… 6 4.3 Fuse Replacement ………………………………………………………….…. 6 5.
1 Introduction The Zero-Air Generator (ZAG) is a simple, light-weight, self-contained system capable of producing high purity, particle free, dry air at up to 18 liters per minute. It is designed to replace gas cylinders as a source of calibration standard. The ZAG can be used with stationary analyzers, but its portability makes it especially well suited for use with remote monitoring sites and mobile testing facilities. Operation is very simple.
2 Description of Components 2.1 Perma Pure Dryer Water vapor and certain polar organic compounds (i.e. alcohols, ketones) are removed here. A bundle of Nafion tubes is housed inside the dryer shell. As the wet compressed air flows through the tubes, the water vapor is absorbed through the membrane and carried off by a counter-current purge air flow at a reduced pressure.
3 Start-Up Procedure 1. Place the ZAG on a level, dry surface. 10 2. Check to make sure the power switch is in the ‘off’ position. 15 psi 5 20 25 0 30 30 25 SYSTEM PRESSURE 20 15 10 REPLACE ABSORBENT WHEN COLOR CHANGE REACHES THIS POINT 3. Plug the unit into a standard 110V electrical outlet. ZERO−AIR OUTLET 4. Open the flow control knob fully (turn the knob counter-clockwise). OUTLET FLOW (LPM) Figure 3A – ZAG Top Panel 5.
4 Maintenance Routine maintenance on the ZAG consists of periodic carbon replacement and outlet filter replacement. Under normal, intermittent use, the desiccant should last at least six months. 4.1 Activated Carbon/Alumina Replacement WARNING!! De-pressurize and unplug the ZAG before attempting any maintenance or removing the top or bottom panels! The activated carbon canister is located behind the top panel. The top half of the canister is exposed to allow visual inspection of the mixture.
4.2 Final Filter Replacement The final filter should be replaced each time the activated carbon/alumina is changed. The filter is located immediately after the outlet of the CO catalyst canister. 1. Remove the four (4) panel screws using a 1/8” Allen wrench and pull the top panel out. Note the position of the filter so that you can install the replacement in the same way. 2. Loosen the 1/4” compression nuts on either end and pull the filter from the tubing. 3.
the wiring connections to make sure they are secure. If any loose wires are evident, tighten the connection if possible. Refer to the wiring schematic for details if necessary. Figure 5 – ZAG Wiring Schematic " If the unit still does not run after re-installing the panel and connecting power, it may be necessary to return it to Perma Pure for maintenance. Please contact Perma Pure to arrange any returns for maintenance.
The following spare parts are recommended for each maintenance period. All maintenance should be performed each time the activated carbon/alumina canister changes color from purple to brown along 3/4 or more of its length. 1) Activated Carbon/Impregnated Alumina Blend - Purafil CP Blend Purafil, Inc. P.O. Box 1188 Norcross, Georgia 30091 Approximately 0.7 lb. required per adsorbent change. 2) Outlet Filter - 1µ absolute particulate filter available from: Headline Filters Inc.
