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is dramatically affected by the diameter and length of the hoses being used to evacuate.  Using a 3/8” 

hose will  allow  FOUR times more throughput than a 1/4” hose.  A 1/2” hose will allow 16 TIMES more 

throughput than a 1/4”hose. 

Even if you have to connect to a 1/4” access port, due the principals of flow in a vacuum as they relate to 

pumping speeds, the use of a larger diameter hose will  dramatically decrease your evacuation time.  

Imagine that you are driving and encounter an accident on a busy highway.  Traffic slows down while 

everyone gathers into one lane in order to pass the accident.  An entire highway full of cars being forced 

into one lane for an entire trip  is similar to how using small diameter hoses restricts throughput during 

an evacuation.

Now, imagine that instead of being forced into one line for the entire trip, the accident is quickly passed 

and the cars spread out into all of the lanes, returning traffic to full speed.  This is how the principals of 

flow in a vacuum operate: the greater the flow, the faster you go.

It is best if a system has multiple access ports at different points along the system.  By attaching to as many 

access ports as possible and evacuating from  them simultaneously into the TEZ8, a technician can reach 

the deepest vacuum throughout the entire system, in the least amount of time.

8

The Greater the Flow the Faster You Go

The rate of flow during the evacuation of a system is referred to as “throughput.”  The throughput depends 

on the resistance to flow and the pressure drop between the entrance and exit of a hose or channel.  Large 

Helpful Hints Continued

diameter hoses and clear evacuation paths will ensure 

the most throughput and shortest evacuation times

.

 

Remove  restrictions  such  as  core  depressors  in 

hoses  or  Schaeder-type  valve  cores  to  ensure 

maximum flow.  It is recommended to use an Appion 

Vacuum-Rated Valve Core Removal Tool 

(see right)

 

in order to properly remove the access valve cores 

and maintain a good seal for a deep vacuum.

When a system is in a vacuum the pumping speed 

Excessive or Trapped Moisture in a System

It may be more difficult to pull a deep vacuum if the system oil has had significant exposure to atmospheric 

air/moisture.  Frequent oil changes due to contaminated T

EZ

OM oil can be an indication that there is 

excessive moisture in a system. 

Systems that use POE oil (approximately 100 TIMES more hydroscopic than mineral oil) can absorb a 

considerable amount of moisture when opened to atmosphere. Purging the system with dry nitrogen prior to 

evacuation can help clear the system of POE oil and moisture to reduce evacuation time considerably.

During the process of pulling a vacuum it is also possible that water or liquid may get trapped within the 

system.  This is not uncommon and usually happens where the system has low points or “traps” that can 

catch moisture. While you are evacuating the system, look over the system for places on the outside of 

the piping where condensation or frost are forming.  At any locations where you find condensation or frost 

on the outside of the piping you can be fairly certain that moisture is collecting inside.

Two possible methods for combating trapped liquid are applying heat to the outside of the piping with a 

heat gun or by blowing nitrogen through the affected part of the system.

Example Valve Core Removal Tool Setup

Summary of Contents for TEZ 8

Page 1: ...OPERATING MANUAL COPYRIGHT 2010 APPION INC ALL RIGHTS RESERVED APPIONTM TEZTM TEZOMTM AND MEGASEALTM ARE TRADEMARKS OF APPION INC TM ...

Page 2: ...5 Changing the Oil 5 How Often Should You Change the Oil 6 Helpful Hints 7 Why Should You Use a High Vacuum Pump 7 Vacuum Gauge Placement 7 The Greater the Flow the Faster You Go 8 Excessive or Trapped Moisture in a System 8 Extension Cords and Low Voltage 9 Care and Maintenance 9 Cleaning the Input Debris Screen 9 Troubleshooting Guide 10 Electrical Diagram 10 Parts Diagram 11 Manufacturers Limit...

Page 3: ... the power supply before any maintenance or service of the TEZ8 to reduce the risk of electrical shock or injury Keep out of reach of children at all times Machine Usage Caution Always use a grounded 3 prong outlet Caution Always remove all refrigerant from the system before connecting the vacuum pump We recommend using the Appion G5Twin for this purpose Equipment damage may occur if the evacuatio...

Page 4: ... screw collar by turning it clockwise Tighten Loosen The TEZ8 is equipped with four input fittings of different sizes These fittings should be kept sealed with the included Appion MegaSealTM caps when the pump is not being used to prevent moisture from accumulating inside the pump For increased flow and shorter evacuation times multiple inputs may be used at once Debris Monitor Catch Tube The TEZ8...

Page 5: ...longs the life of the pump but also helps you to achieve a rapid and deep ultimate vacuum Changing the oil in the Appion TEZ8 is as easy as installing a new TEZOM oil cartridge following the procedure below Replacement TEZOM Oil Cartridges can be purchased from your local wholesaler Note Be sure to only use genuine Appion TEZOM Oil Cartridges in your TEZ8 vacuum pump to ensure optimal performance ...

Page 6: ...like a paper towel that the TEZ8 is using to dry the system If the system has a significant amount of moisture in it your paper towel gets saturated quickly and stops absorbing the moisture as it should At this point you have to decide wether or not you can wait for the paper towel to dry and continue to use the same one or discard it and get a fresh paper towel to dry more faster The moisture abs...

Page 7: ...at you can get water to boil at 72 F by creating a vacuum of 29 12 Inches Hg just over 20 000 microns in a system Temperature in F Inches of Mercury Microns Pounds Sq In Pressure 212 0 00 759 968 14 696 205 4 95 535 000 12 279 194 9 23 525 526 10 162 176 15 94 355 092 6 866 158 20 72 233 680 4 519 140 24 04 149 352 2 888 122 26 28 92 456 1 788 104 27 75 55 118 1 066 86 28 67 31 750 614 80 28 92 25...

Page 8: ... Large Helpful Hints Continued diameter hoses and clear evacuation paths will ensure the most throughput and shortest evacuation times Remove restrictions such as core depressors in hoses or Schaeder type valve cores to ensure maximum flow It is recommended to use anAppion Vacuum Rated Valve Core Removal Tool see right in order to properly remove the access valve cores and maintain a good seal for...

Page 9: ...ed with a clear monitor tube located in the right front corner of the machine which allows you to observe the incoming airflow for debris oil or any other material which could damage the pump A small filter screen is located in the fitting at the top of this monitor tube to prevent large debris from entering the pump and causing damage For best results this screen should be cleaned regularly Open ...

Page 10: ...start pump Close cap tightly for evacuation Poor vacuum Oil murky or dark in color Loose hose connection Oil contaminated Low oil level Miscalibrated gauge Oil contaminated Check all hose connections and flare caps for any leaks Replace with new oil Replace with new oil Recalibrate gauge or try a different gauge Replace with new oil Loose wire in machine Electrical Diagram Troubleshooting Guide Ap...

Page 11: ...r Cord Right Side Panel Motor Bracket Fan Blade Motor 7 8 9 10 11 12 Pump Assembly Debris Screen Oil Port Cover Front Panel Debris Tube Spring Debris Tube 13 14 15 16 17 18 Debris Tube Door TEZOM Door TEZOM Support Front Panel Insert 19 20 21 22 Appion reserves the right to make changes to product and specifications without notice ...

Page 12: ...PECIFICALLY DISCLAIMS ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION ANY AND ALL WARRANTIES AS TO THE SUITABILITY OR MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OF THE EQUIPMENT FURNISHED HERE UNDER THE EXCLUSIVE REMEDY OF PURCHASER AGAINST MANUFACTURER FOR ANY BREACH OF THE FOREGOING LIMITED WARRANTY SHALL BE TO SEEK REPLACEMENT OF THE AFFECTED PARTS IN NO EVENT WI...

Page 13: ...aler________________________ Recommended By __________________ Magazine Mailing Newspaper Ad Internet What features most interested you Check all that apply High Production Low Maintenance Versatility Portability Ease of Use Other ____________________ To Validate your warranty follow these steps within 10 days of purchase 1 2 Complete the Warranty Card below Send 1 completed Warranty Card and 2 co...

Page 14: ...Appion Inc 2800 South Tejon Street Englewood CO 80110 USA Phone 303 937 1580 Fax 303 937 1599 www AppionInc com sales AppionInc com support AppionInc com ...

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