GeneralD es c rip t io nThe Model AMD -1 Autom atic Air Main-tenance D evice is an autom atic, field-adjustable device of the pressure re-ducing type. It is used to control thepressure in a dry pipe sprink ler sys-tem , preaction system , or dry pilot linesystem of a dry pilot actuated delugeor preaction valve. The AMD -1 is util-ized in applications where there is acom pressed air (or nitrogen) sourcewhich is controlled at a higher pres-sure than the desired system pressure.P ressure sources include plant airsupplies having their own autom aticcom pressor controls, or nitrogen sup-plies having single-stage cylinderm ounted pressure regulators.

The Model AMD -1 Autom atic Air Main-tenance D evice is a redesignation forthe C entral Model D -2, G em ModelF 3 24 , and S tar Model S 4 60 .

WARNINGThe Model AMD -1 Autom atic Air Main-tenance D evice described herein m ustbe installed and m aintained in com pli-ance with this docum ent, as well aswith the applicable standards of theN ational F ire P rotection Association,in addition to the standards of anyother authorities having jurisdiction.F ailure to do so m ay im pair the integ-rity of this device.

The owner is responsible for m aintain-ing their fire protection system and de-vices in proper operating condition.The installing contractor or sprink lerm anufacturer should be contactedrelative to any q uestions.

T ec h nic alD ataAp p rovalsU L and U LC Listed. F M Approved.

M ax im u m Inlet Air (or Nit rog en)Su p p ly P ressu re20 0 psi (13 ,8 bar)

F ield Ad ju stab le Ou tlet P ressu reRang e5 to 7 0 psi (0 ,4 to 4 ,8 bar)

Assem b lyMajor com ponents illustrated in F igure1 are factory assem bled with galva-nized steel nipples and m alleable ironpipe fittings.

O p erat io nThe B y-P ass V alve in the AMD -1 isopened to fast fill the system during theinitial pressurization. O nce the re-q uired system pressure has beenreached, the B y-P ass V alve is closedand the Air S upply C ontrol V alve is leftopen to place the AMD -1 in autom aticoperation.

G iven a sm all leak in the system , theP ressure R egulator will autom aticallym aintain system pressure at the pre-set level. The 1/8 inch (3 ,2 m m ) orificein the R estrictor C heck V alve lim its theflow of air from the P ressure R egulatorinto the system to a value which issignificantly less than that which willbe ex hausted by the operation of a 5.6K -factor sprink ler.

Ins tallat io nThe Model AMD -1 Autom atic Air Main-tenance D evice m ust be installed inaccordance with the following instruc-tions:

NOTES uitable consideration m ust be givento the rem oval of ex cessive m oisturefrom the com pressed air supply.

Step 1 . C onnections between the inletair supply and the AMD -1, as well asbetween the AMD -1 and the system tobe pressurized, are to be a m inim umof 1/2 inch (D N 15) pipe size.

Step 2. A 1/2 inch (D N 15), non-springloaded, rubber faced, swing typecheck valve m ust be located betweenthe AMD -1 and the system to be pres-surized. A check valve of this type isprovided in the air supply trim of TycoF ire P roducts dry pipe valves, preac-tion valves, and dry pilot trim .

M o d el A M D -1 A u to m atic A ir M aintenanc e D ev ic eP res s u re R ed u c ing T y p eW ith F ield A d ju s tab le P res s u re R eg u lato r

Page 1 of 4 T F P12 2 1A PR IL , 2 0 0 3

Technical Services: Tel: (8 0 0 ) 3 8 1-9 3 12 / F ax : (8 0 0 ) 7 9 1-550 0

Customer Service/Sales:

Tel: (4 1 4 ) 5 7 0 -5 0 0 0 / (8 0 0 ) 5 5 8 -5 2 3 6

F a x : (4 1 4 ) 5 7 0 -5 0 1 0 / (8 0 0 ) 8 7 7 -1 2 9 5

SettingProcedureThe Model AMD-1 Automatic Air Main-tenance Device must be set in accord-ance with the following instructions:

Step 1. Determine the pressure thatmeets the minimum requirements ofthe system to be pressurized.

Step 2. Close the AMD-1 By-PassValve, and close the AMD-1 Air SupplyControl Valve.

Step 3 . Open the control valve in theair supply trim of the system to bepressurized and then reduce the sys-tem air pressure to 0 psig.

Step 4. Close the control valve in theair supply trim of the system to bepressured.

Step 5 . Remove the system pressuregauge from its connection and tempo-rariliy install it in the 1/4 inch NPTAMD-1 Gauge Test Port.

NOTEMake certain that the piping to whichthe AMD-1 Gauge Test Port is con-nected is at 0 psig before removing theplug.

Step 6 . Open the Air Supply ControlValve in the AMD-1.

Step 7 . W hile observing the relocatedpressure gauge, adjust the output

pressure of the pressure regulator.Pullthe knob out and away from the pres-sure regulator body and then slowlyturn the knob clockwise, as viewedfrom the knob end of the pressureregulator, to increase pressure andcounter-clockwise to decrease pres-sure.

W hen decreasing pressure, the airpressure must be relieved down-stream of the pressure regulator bytemporarily opening the control valvein the air supply trim of the system tobe pressurized (assuming that the sys-tem to be pressurized is at 0 psig).

After the pressure regulator is set,push the knob in and towards the pres-sure regulator body to “snap” it in alocked position.

Step 8. Close the Air Supply ControlValve in the AMD-1.

Step 9. Return the system air pressuregauge to its normal location. Re-installthe 1/4 inch pipe plug in the the AMD-1Gauge Test Port. Apply pipe threadsealant sparingly to the plug threadsonly.

NOTEMake certain that the piping to whichthe AMD-1 Gauge Test Port is con-nected is at 0 psig before removing thepessure gauge.

Step 10 . Open the control valve in theair supply trim to the system beingpressurized.

Step 11. Open the Air Supply ControlValve in the AMD-1.

Step 12. Open the By-Pass Valve inthe AMD-1.

Step 13 . Close the By-Pass Valve afterthe system has been pressurized toapproximately 5 psi (0,4 bar) less thanthe minimum required system pres-sure determined in Step 1.

Step 14. After the system pressurehas stabilized, note the value and com-pare with the requirement. Readjustthe Pressure Regulator, as require.

NOTESIf the system was over-pressurizedduring manual fill, a suitable connec-tion to the system must be opened andthe pressure manually reduced to thedesired value. The AMD-1 will thenautomatically maintain the preset sys-tem pressure. The Restrictor CheckValve prevents the Pressure Regula-tor from bleeding down the systempressure.

The system pressure should be set atthe minimum required value, in orderto minimize the time for system trip inthe event of a sprinkler operation.

Page 2 of 4 TFP1221

FIGU RE 1MOD EL AMD -1 AU TOMATIC AIR MAINTENANCE D EV ICE

2"(50,8 mm)

16-1/8""(409,6 mm)

8-1/2"(215,9 mm)

3-1/4"(82,6 mm)

(NORMALLYCLOSED)

1/2" NPTINLET CONNECTION

(FROM COMPRESSEDAIR SUPPLY )

1/2" NPTOUTLET

CONNECTION

AIR SUPPLYCONTROL VALVE

(NORMALLY OPEN)P/N 46-048-1-002

PRESSUREREGULATOR

(ADJ USTABLE)

(TO SY STEM)

STRAINER

RESTRICTORCHECK VALVE

P/N 46-047-1-004

P/N 92-324-1-012P/N 92-322-1-001

P/N 92-326-1-003

1/4" NPTGAUGE

TEST PORT

BY -PASS VALVE

LABEL

Care andMaintenanceThe following inspection proceduremust be performed as indicated, in ad-dition to any specific requirements ofthe NFPA, and any impairment mustbe immediately corrected.

The owner is responsible for the in-spection, testing, and maintenance oftheir fire protection system and de-vices in compliance with this docu-ment, as well as with the applicablestandards of the National Fire Protec-tion Association (e.g., NFPA 25), inaddition to the standards of anyauthority having jurisdiction. The in-stalling contractor or product manufac-turer should be contacted relative toany questions.

It is recommended that automaticspr inkler systems be inspected,tested, and maintained by a qualifiedInspection Service.

NOTESBefore closing a fire protection systemmain control valve for maintenancework on the fire protection system thatit controls, permission to shut down theaffected fire protection systems mustfirst be obtained from the properauthorities and all personnel who maybe affected by this decision must benotified.

After placing a fire protection systemin service, notify the proper authoritiesand advise those responsible for moni-toring proprietary and/or central sta-tion alarms.

It is also recommended that accumu-lated moisture be removed from airsupply moisture filtration equipment,at least quarterly. More frequent in-spections may be necessary in par-ticularly humid environments

The Model AMD-1 Automatic Air Main-tenance Device must be inspectedquarterly in accordance with the fol-lowing instructions:

1. Verify that the By-Pass Valve isclosed.

2. Close the AMD-1 Air Supply ControlValve and clean out the 1/4 inchStrainer located at the inlet to theRestrictor Check Valve. Be sure toreinstall the strainer screen andtighten the cap securely.

3. Open the AMD-1 Air Supply Valveand verify that the control valve inthe air supply trim to the systembeing pressurized is open.

4. Verify that the system pressure isessentially the same as the pre-viously established requirement. Ifnot, adjust the system pressure asfollows:

a. Close the system’s main controlvalve and open the main drainvalve. Close the AcceleratorControl Valve, if the system is soequipped.

b. Follow Steps 1 through 14 in theSetting Procedure.

c. Slowly open the AcceleratorControl Valve, as applicable.

d. Slowly open the main controlvalve and after water begins toflow, slowly close the main drainvalve and then completely openthe main control valve. TheAMD-1 Air Maintenance Deviceis now ready for service.

L imitedWarrantyProducts manufactured by Tyco FireProducts are warranted solely to theoriginal Buyer for ten (10) yearsagainst defects in material and work-manship when paid for and properlyinstalled and maintained under normaluse and service. This warranty will ex-pire ten (10) years from date of ship-ment by Tyco Fire Products. No war-ranty is given for products orcomponents manufactured by compa-nies not affiliated by ownership withTyco Fire Products or for products andcomponents which have been subjectto misuse, improper installation, corro-sion, or which have not been installed,maintained, modified or repaired in ac-cordance with applicable Standards ofthe National Fire Protection Associa-tion, and/or the standards of any otherAuthorities Having Jurisdiction. Mate-rials found by Tyco Fire Products to bedefective shall be either repaired orreplaced, at Tyco Fire Products’ soleoption. Tyco Fire Products neither as-sumes, nor authorizes any person toassume for it, any other obligation inconnection with the sale of products orparts of products. Tyco Fire Productsshall not be responsible for sprinklersystem design errors or inaccurate orincomplete information supplied byBuyer or Buyer’s representatives.

IN NO EVENT SHALL TYCO FIREPRODUCTS BE LIABLE, IN CON-TRACT, TORT, STRICT LIABILITY OR

UNDER ANY OTHER LEGAL THE-ORY, FOR INCIDENTAL, INDIRECT,SPECIAL OR CONSEQ UENTIALDAMAGES, INCLUDING BUT NOTLIMITED TO LABOR CHARGES, RE-GARDLESS OF WHETHER TYCOFIRE PRODUCTS WAS INFORMEDABOUT THE POSSIBILITY OF SUCHDAMAGES, AND IN NO EVENTSHALL TYCO FIRE PRODUCTS’ LI-ABILITY EX CEED AN AMOUNTEQ UAL TO THE SALES PRICE.

TH E FOREGOING WARRANTY ISMADE IN LIEU OF ANY AND ALLOTH ER WARRANTIES EX PRESS ORIMPLIED, INCLUDING WARRANTIESOF MERCH ANTAB ILITY AND FIT-NESS FOR A PARTICULAR PUR-POSE.

OrderingInformationOrders for the AMD-1 and replace-ment parts must include the descrip-tion and Part Number (P/N).

AMD-1:Specify: Model AMD-1 Automatic AirMaintenance Device,P/N 52-324-2-002

Replacement Parts forAMD-2 Air Maintenance Device:(Specify description) for use withModel AMD-1 Automatic Air Mainte-nance Device, P/N (see Figure 1).

TFP1221 Page 3 of 4

TYCO FIRE PRODUCTS, 451 North Cannon Avenue, Lansdale, Pennsylvania 19446

Page 4 of 4 TFP1221