Air Monitor AUTO-purge III User manual

Installation, Operation,
and Maintenance Manual
AUTO-purge III
Panel
Installation, Operation & Maintenance
Air Monitor Corporation provides complete
technical support between the hours of
7 a.m. and 5 p.m. PST, M-F
Contact our Service Department
Toll Free: 1-800-AIRFLOW
or fax us at 1-707-526-2825
Air Monitor Corporation
116-038-40.P65 (08/24/10)
AUTO-purge III - IO&M Manual
Precision Airflow Measurement
An ON
I CON Brand

AUTO-purgeIII
Air Monitor Corporation
116-038-40.P65(08/24/10) AUTO-purgeIII -IO&M Manual
TABLEOFCONTENTS
INSTRUMENTWARRANTY ...................................................................................................................... i
SECTION1 – GENERAL INFORMATION
1.1 DESCRIPTION ................................................................................................................................1
1.2 SEQUENCEOFOPERATION ......................................................................................................... 1
SECTION2 – FEATURES
2.1 CONSTRUCTION............................................................................................................................. 2
2.2 MULTIPLEOPERATINGPOWER OPTIONS ................................................................................... 2
2.3 ENCLOSUREHEATING .................................................................................................................. 2
SECTION 3 – INSTALLATION
3.1 RECEIVINGANDINSPECTION ....................................................................................................... 3
3.2 LOCATION ...................................................................................................................................... 3
3.3 MOUNTING ..................................................................................................................................... 4
3.4 PROCESSCONNECTIONS ......................................................................................................... 4-5
3.5 ACCUMULATORTANK ................................................................................................................... 5
3.6 ELECTRICALCONNECTIONS ........................................................................................................ 6
SECTION 4 – SET-UP
4.1 VERIFICATION OFPURGEPRESSURE ........................................................................................ 7
SECTION5 –OPERATION ...................................................................................................................... 8
SECTION6 – VERIFICATION OF PURGE PERFORMANCE ................................................................... 9
SECTION7– MAINTENANCE
7.1 INSPECTION................................................................................................................................. 10
SECTION8 – TROUBLE SHOOTING .....................................................................................................11
SECTION9 – CUSTOMER SERVICE
9.1 CUSTOMERSERVICE ................................................................................................................. 12
9.2 REPAIRS/RETURNS ..................................................................................................................... 12
9.3 WARRANTYREPAIR/RETURN ..................................................................................................... 12
9.4 NON-WARRANTYREPAIRS/RETURNS ....................................................................................... 12
9.5 FIELDSERVICE ........................................................................................................................... 12
TABLEOFCONTENTS

AUTO-purgeIII
Air Monitor Corporation
116-038-40.P65(08/24/10) AUTO-purgeIII -IO&M Manual
i
INSTRUMENT WARRANTY
NOTICEOF PROPRIETARYRIGHTS
This document contains confidential technical data, including
trade secrets and proprietary information which are the sole
property of Air Monitor Corporation. The use of said data is
solelylimitedto useas specifiedherein. Anyother useis strictly
prohibited without the prior written consent of Air Monitor
Corporation.
INSTRUMENTWARRANTY
AirMonitorCorporation(hereinafterreferredto as“Seller”)
warrants that at the time of shipment, products sold
pursuant to this contract will be free from defects in
materials and workmanship, and will conform to the
specifications furnished or approved in writing by Seller.
Nowarranty is giventhat delivered productswill conform
to catalog sheets, data sheets, and the like, which are
subject to change without notice.
Seller will repair or replace, at its option, any products
listedunderthiswarranty whichisreturned freightprepaid
toSellerwithintwo(2) yearsafterstart-uportwenty-seven
(27) months after shipment, prove upon test and
examination by Seller to be defective within the terms of
this warranty. The warranty period for any item repaired
orreplacedshallbefor thetimeremainingon thewarranty
periodof theoriginal components. Purchasershall notify
Seller in writing of such defect within sixty (60) days of
discoveryof thedefect.
This warranty does not extend to any product sold by
Seller which has been the subject of misuse, neglect,
accident, damage or malfunction caused by
interconnectionwith equipmentmanufactured by others,
improper installation or storage, or used in violation of
instructionsfurnished by Seller,nor does itextend to any
product which has been repaired or altered by persons
notexpresslyapprovedbySeller. NordoesSellerwarrant
equipmentagainstnormaldeteriorationduetoenvironment;
noritems suchas lamps, glass,and similaritems subject
towear orburnout through usage. Adjustmentsforitems
or equipment not manufactured by Seller shall be made
totheextentofanywarrantyofthemanufacturerorsupplier
thereof.
Seller shall not be liable for any special or consequential
damagesorforlossofdamage,directlyorindirectlyarising
from the use of the products.
Thewarrantysetforthaboveisinlieuofallotherwarranties
eitherexpress orimplied andconstitutes the fullextent of
Air Monitor Corporation’s liability to the customer, or any
otherpartyfor breachof warranty.
THEREARE NOEXPRESSWARRANTIESEXCEPTAS
SET FORTH HEREIN AND THERE ARE NO IMPLIED
WARRANTIES OF MERCHANTABILITY OF FITNESS
FOR ANY PARTICULAR PURPOSE, WHICH ARE
PARTICULARLYDISCLAIMED.

AUTO-purgeIII
Air Monitor Corporation
116-038-40.P65(08/24/10) AUTO-purgeIII -IO&M Manual
1 – GENERAL INFORMATION
1.1 – DESCRIPTION
Air Monitor'sAUTO-purge III is designed for applications where the presence of airborne particulate might impair the
measurement accuracy of Air Monitor's Combustion Air Station or VOLU-probe/SS array. When initiated by an Air
Monitor"smart" flow transmitter(such asthe VELTRONII, VEL-trol II,or MASS-tron II) theAUTO-purgeIII activates a
combination of fail-safe valves that route high pressure/high volume plant air to the flow measuring device for a short
duration, while simultaneously isolating the flow transmitter from overpressurization. This periodic purging assists in
maintaining the total and static sensing ports of the flow measuring devices in a clear, unobstructed condition.
1.2 – SEQUENCE OF OPERATION
Uponinitiationof anAUTO-purgecycle(viaexternalcommand), solenoidvalveson SV-1AandSV-1B willbeenergized,
allowing pilot air (AS-1) to shuttle SV-1Aand SV-1B, isolating the transmitter from the signal lines.
After three seconds, SV-2 will be energized, allowing high pressure purge air (AS-2) to flow to the total and static
sensingports of theflow measuring devices.
When the programming purge duration is complete, SV-2 is de-energized removing purge air. Aprogrammable after
purge duration allows for residual high pressure to bleed off before SV-1A and SV-1B shuttle back to re-connect the
transmitter to the signal lines.
1
SECTION1–GENERALINFORMATION

AUTO-purgeIII
Air Monitor Corporation
116-038-40.P65(08/24/10) AUTO-purgeIII -IO&M Manual
2 – FEATURES
2.1 – CONSTRUCTION
Brass and Copper.
–All wetted tubing, fittings,and are valves constructedof copper and/or brass.
– Enclosure is NEMA 4 painted steel.*
– External connection fittings are stainless steel FPT.
or
Stainless Steel.
–All wetted tubing, fittings, and valves are constructed of 316 stainless steel.
– Enclosure is NEMA 4 painted steel.*
– External connection fittings are stainless steel FPT.
*Stainlesssteel orfiberglass NEMA4Xenclosure optionally available.
2.2 – MULTIPLE OPERATING POWER OPTIONS
TheAUTO-purgeIIIpanelisavailable fromthe Factoryin 24VAC,24VDC,or 120VACoperatingpower.
Powerrequirements:
– 24VAC. 74VA(in rush), 62VA(continuous)
– 24VDC. 28W
– 120VAC. 77VA(inrush), 65VA(continuous)
2.3 – ENCLOSURE HEATING
Anoptional enclosureheater isavailable for theAUTO-purgeIIIpanel. Requires 120VAC(3.2 amps)power.
2
SECTION 2 – FEATURES

AUTO-purgeIII
Air Monitor Corporation
116-038-40.P65(08/24/10) AUTO-purgeIII -IO&M Manual
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3.1 – RECEIVING AND INSPECTION
• Carefully remove theAUTO-purge III Panel from its shipping container and inspect for any damage. If damaged,
contact freight company.
• VerifytheAUTO-purgeIII Panelis configured accordingto yourorder. Ifnot,contactAirMonitor's CustomerService
Departmentat1-800-AIRFLOW forfurtherguidance.
3.2 – LOCATION
• TheAUTO-purgeIII Panel is housedin a NEMA4enclosurewhich is suitableforoutdoor locations.
• The ambient temperature of the selected location must be between 32º – 120ºF, unless an appropriate means of
heatingor coolingare included.
• Theselected mountinglocation should berigid andfree of vibration.
• TheAUTO-purgeIIIPanelshould bemountedas closeaspossible toitsassociatedflow measuringstationorprobes.
In no case should the distance be greater than 50 feet. See Section 3.4 for appropriate line sizes.
Figure3.1
3 – INSTALLATION
SECTION3–INSTALLATION

AUTO-purgeIII
Air Monitor Corporation
116-038-40.P65(08/24/10) AUTO-purgeIII -IO&M Manual
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3.3 – MOUNTING
• TheAUTO-purgeIII Panel canbe mounted in anyposition provided it issecured by allfour mounting tabs.
• SecuretheAUTO-purgeIIIPanelutilizing appropriatehardware.
Figure3.2
3.4 – PROCESS CONNECTIONS
• Figure3.2 depictsthe variousbulkhead connections locatedon the bottomof theAUTO-purgeIII Panel.
• To bulkheadsA, B, D, and E install appropriate connection fittings according to Table 3.1 and 3.2.
• To bulkhead Cinstallappropriate connection fittingfor 1/2" orlarger pipe.
CAUTION
– Selectedconnection fittings must becompatiblewith the bulkheadfittings on theAUTO-purgeIIIPanel.
– Connectionfittings must beinstalled using appropriatethread lubricant/sealant.
– Wheninstalling or removingconnection fittings, a wrenchshould be usedon the bulkhead fittingto prevent turning.
SECTION3–INSTALLATION

AUTO-purgeIII
Air Monitor Corporation
116-038-40.P65(08/24/10) AUTO-purgeIII -IO&M Manual
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3.4 – PROCESS CONNECTIONS (con't)
Static and Total Pressure from Flow Station/Probe (Connection Code Aand B). For tubing sizes versus length,
seeTable 3.1below:
*Wall thickness no greater than 0.065".Table3.1
NOTE:Recommended Tubing Wall Thickness: .035” wall tubing is suitable for compression fittings. If socket weld
fittings are substituted, increase wall thickness to .065”.
Ator near theFlow Station/Probe,test tees shouldbe installed (seeFigure 3.1). On multiple probeassemblies, these
tees should be located in the interconnecting tubing, and as far away as possible from the incoming signal transport
lines. This test tee will be utilized in Section 4.
Static and Total Pressure from AUTO-purge Panel to Remote Flow Transmitter (Connection Code D and E).
For tubing sizes versus length, see Table 3.2 below:
Table3.2
Drip legs (see Figure 3.1) should be installed to preclude the migration of humidity/water into the flow transmitter.
The drip legs should be installed at the lowest point in the signal lines.
SupplyAir (Connection Code C). Air should be connected with a minimum of 1/2" Schedule 40 pipe. Supply air
must be supplied at 80 to 125 psig at 100 CFM, oil and dirt free.
Electrical Connections (Connections Code H and J). See Section 3.6.
3.5 – ACCUMULATOR TANK
Forthe optimum performance of theAUTO-purgeIII system, it is recommended thatan accumulator tankbe used as
a reservoir for purge air (see Figure 3.1). Table 3.3 lists recommended tank sizes.
Table3.3
The accumulator tank should be furnished with pressure regulator, coalescing filter, check valve, and pressure relief
valve.
SECTION3–INSTALLATION
Station or Probe Size
All CA Stations
VOLU-probeshaving combinedlength lessthan 10feet
VOLU-probeshavingcombined lengthgreater than10 feet
AccumulatorTank Size
120Gallons
80Gallons
120Gallon
Distancefrom PurgePanel
toFlow Transmitter
Under50feet
50 to 200 feet
Greaterthan 200feet
MinimumTube Size
1/4"
3/8"
1/2"
Distancefrom FlowMeasuring
Station orProbe toAUTO-purge III
Under25feet
25 to 50 feet
Greaterthan 50feet
Minimum Tube Size
1/2" O.D.*
3/4" O.D.*
1.0" O.D.*

AUTO-purgeIII
Air Monitor Corporation
116-038-40.P65(08/24/10) AUTO-purgeIII -IO&M Manual
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3.6 – ELECTRICAL CONNECTIONS
It is recommended that wiring be 14 to 22AWG.
AUTO-purge Start/Stop Command. Customeris toprovide poweredcontact closureofcorrect voltagefor durationof
purge cycle. This contact closure is typically provided by Air Monitor's VELTRON II, VEL-trol II, or MASS-tron II as
these"smart" transmitters allowAUTO-purgeprogramming. See Figure 3.3below for wiringdetails.
Figure3.3
Ifa VELTRONDPT-plus is usedin conjunction with theAUTO-purgeIIIpanel,a "smart" relay (R1)will be installedin
thepanel to performpurge management. See Figure3.4 below forwiring details.
Figure3.4
If means other than anAir Monitor "smart" transmitter is used to Start/Stop the purge cycle, the power provided must
match the coil voltage of SV-1A, SV-1B, and SV-2 (i.e., 24VDC, 24VAC, or 120VAC).
Optional Panel Heater (TB-2). Customer to provide 120VAC, 3.2 amps minimum.
Figure3.5
SECTION3–INSTALLATION