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Graco A-25 - page 1
Operation PLURAL COMPONENT PROPORTIONER ® A-2 5 Air operated, electrically heated , plural component pr opor tioner For spraying or disp ensing 1:1 ratio pol yurethane foam form ulations and other 1:1 fast setting materials. Not for use in e xplosive at mospheres or hazardous locations. This model is fi eld-configurable to the follo wing supply vo ...
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Graco A-25 - page 2
2 3A1569B Contents Proportioner Models . . . . . . . . . . . . . . . . . . . . . . . . 3 Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Related M anuals . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 W arnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Impor tant T wo-Component Materi ...
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Graco A-25 - page 3
Proportioner Models 3A1569B 3 Pr opor tioner Models All propor tioners can be configured t o operate on 380V (4 wire), 230V (3 wire), or 23 0V 1Ø. Systems All systems include a proportioner , spra y gun, and 60 ft (18.3 m) of heat ed hose. Related Manuals Manuals ar e av ailable at www .g raco .com. Component manu als in English: Pa r t N o . Maxi ...
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Graco A-25 - page 4
Warnings 4 3A1569B Wa r n i n g s The f ollowing warnings are f or the setup , use, grounding, maintenance, and repair of this equipment . The e xclama- tion point symbol ale r ts you to a gener al warn ing and the hazard symbo ls refer to proced ure-specific risks. When these symbols appear in the body of this manual, re f er ba ck to these W a rn ...
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Graco A-25 - page 5
Warnings 3A1569B 5 FIRE AND EXPLOSION HAZARD Flammable fumes, such as solvent and paint fumes, in wo rk a r e a can ignite or e xplode. T o help pre v ent fire and explosion: • Use equipment only in we ll vent ilated area. • Eliminate all ignition sources; such as pilo t lights, cigarettes, por table electric lamps , and plastic drop cloths (po ...
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Graco A-25 - page 6
Warnings 6 3A1569B EQUIPMENT MISUSE HAZARD Misuse can cause death or serious injury . • Do not oper ate the unit when f atigued or under the influence of dr ugs or alcohol. • Do not e xceed the maximum w or king pressure or temper ature rating of the lo west rated system component. See T echnical Da ta in all equipment manuals . • Use fluids ...
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Graco A-25 - page 7
Important Two-Component Materi al Information 3A1569B 7 Impor tant T w o-Component Material Inf o rmation Isocy anate Conditions Material Self-ignition K eep Components A and B Separate Moisture Sensitivity of Isocy anates Isocy anates (ISO) are catalysts used in tw o component f oam and polyurea coatings. ISO will react with moisture (such as humi ...
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Graco A-25 - page 8
Important Two-Component Material Information 8 3A1569B Changing Materials Changing the material types used in y our equipment requires special atte ntion to av oid equipment damage and downt ime. • When changing m ater ials, f lush the equipment m ul- tiple times to ensure it is thoroughly cle an. • Alwa ys clean the fluid inlet stra iners afte ...
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Graco A-25 - page 9
Typical Installation, without Circulation 3A1569B 9 T ypical Installation, without Circulation Key for F IG . 1 A Reactor Propor tio ner BH e a t e d H o s e C Fluid T emperature Sensor (FTS) D Heated Whip Hose ES p r a y G u n F Propor tioner and Gun Air Su pply Hose G F eed Pump Air Supply Line s H W aste Cont ainers J Fluid Supply Lines K Feed P ...
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Graco A-25 - page 10
Typical Installation, wi th Circulation 10 3A1569B T ypical Installation, with Circulation Key for F IG . 2 A Reactor Propor tio ner B Heated Hose C Fluid T emperature Sensor (FTS) D Heated Whip Hose ES p r a y G u n F Propor tioner and Gun Air Su pply Hose G F eed Pu mp Air Supply Lines J Fluid Supply Lines K Feed Pumps L Agitator (if required) M ...
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Graco A-25 - page 11
Component Identi fication 3A1569B 11 Component Identification F IG . 3: T ypical Instal lation AG T W Z AF R AA S U V AE AC Y X ti16814a AI DD GG FF AD AB AH ...
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Graco A-25 - page 12
Component Identification 12 3A1569B Key: R Main Disconnect Swit ch - Contro ls power to heating circ uits. I S Main Air Filter - Filters system air supply . T Resin (B) Pressure Gauge - Displa ys pressure in resin proportioning system (B side). U Resin (B) - Inlet Supply V alve V Resin (B) Fluid Y-Strainer - (20 mesh) W ISO (A) Pressure Gauge - Dis ...
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Graco A-25 - page 13
Component Identi fication 3A1569B 13 Contr ol P anel T emperature Controls and Indicator s ELECTRONIC MONITORING SYSTEM ° F ° C A B Air Motor Pressure Gauge Air Pressure Regulator Air Motor Shutoff V alve DataT rak (optional) See page 32. See Te m p e r a - ture Controls and Indicators ti16815a NO TICE T o prev ent damage to the sof t ke y butto ...
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Graco A-25 - page 14
Component Identification 14 3A1569B Main P ower Switc h Located on right side of unit, pag e 11. T ur ns heater pow er ON and OFF . Does not tur n heater z ones or pumps on. Actual T emperature Key/LED Press to displa y actual temperature . Press and hold to displa y electrical current. T arget T e mperature Ke y/LED Press to displa y target temper ...
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Graco A-25 - page 15
Setup 3A1569B 15 Setup Locate Reactor A-25 1. Locate Reac tor A-25 on a lev el surface and bolt in place to the floor with 3/8 in. (10 mm) bolts , unless the Reactor needs to re main por table. • T wo bolts through the 2 in. (50 mm) deep caster bushin gs in the rear . • T wo bolts through th e 3-5/8 in. (168 mm) deep caster b ushings in the fro ...
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Graco A-25 - page 16
Setup 16 3A1569B Configure to Supply P ower NO TE: Both cord connection AND jumper positioning steps on page 17 must b e completed. Step One - Connect Electrical Cord NO TE: Disregard ter minal numbers on disconnect s witch blocks . Wire to pos itions shown. T er minals will accept up t o #8 A W G (10 mm 2 ) conductors . 1. Using a flat scre w dr i ...
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Graco A-25 - page 17
Setup 3A1569B 17 Step T wo - Install P ower Jumper s Find location for power jumpers which are in a plastic bag tie wrap ped to the ground lug. 1. T ur n scre ws counter-clockwise on the up per par t of the shroud until the y stop . Pull door up and out. 2. Install red jump ers from the storage bag to t he positions sho wn f or your po wer . • Pu ...
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Graco A-25 - page 18
Setup 18 3A1569B Gr ound System • Reactor : is grounded t hrough power cord; see page 16. • Spra y gun : connect whip hose ground wire to FTS; see page 1 9. Do not d isconnect wire or spray with- out whip hose. • Fluid supply containe rs : follo w your local code. • Object being spra yed : f ollow your local code . • Solv ent pails used w ...
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Graco A-25 - page 19
Setup 3A1569B 19 Recir culation / Pressure Relief Lines If Recirculating to Supply Drum: Conne ct high pressure hos e (R) to relie f fittings (BA, BB) of both PRESSURE RELIEF/SPRAY valves. Route hose back to component A a nd B drums. Refer to manual 309852. Alternate recircul ation hoses (requires adapter fittings): 249508 - ISO (A) (moist ure guar ...
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Graco A-25 - page 20
Setup 20 3A1569B 5. Connect cab les (SS). Con nect electrical connectors (NN). Be sure cab les hav e slack when hose bend s. Wrap cab le and electrical connections with electrical tape. Close Gun Fluid Inlet V alves A and B Connect Whip Hose to Gun or Gun Fluid Manif old For Prob ler P2 guns: Connect hoses to inlet valves . For Fusion gun s: Connec ...
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Graco A-25 - page 21
Initial Startup 3A1569B 21 Initial Star tup Load Fluid w ith Feed Pumps NO TE: The Reactor is tested wit h oil at the factor y . Flush out the oil with a co mpat ible solv ent bef ore s pra y- ing; see page 27. 1. Check that Setup pro cess is com plete; see page 15. 2. T ur n on comp onent B agit ator , if use d. 3. T ur n both PR ESSURE RELIEF/SPR ...
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Graco A-25 - page 22
Initial Startup 22 3A1569B Set T emperatures See Setup , page 15. 1. T ur n main power ON . 2. Press or to change temper ature scale. 3. Press to displa y target temper atures. 4. T o set he at zone target te mperature, pres s or until display sho ws desired temper- ature . Repeat for and zones . NO TE: For z one only , if FTS is disconnected at st ...
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Graco A-25 - page 23
Initial Startup 3A1569B 23 Suppl y W et-Cups with Thr oat Seal Liquid 1. Component A (ISO) Pu mp: K eep reser voir (Z) 3/4 filled with TSL. Wet-cup piston circulates TSL through wet -cup to carr y awa y isocyanate film on displacement rod . Change the fluid in the reservoir when it become s milky-looking. 2. Component B (Resin) Pump: Chec k felt w ...
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Graco A-25 - page 24
Spraying 24 3A1569B Spra ying The Fusion AP gun is show n. 1. After r eaching spra y tempera tures, engage gun piston s af ety lock . 2. Close gun fluid inlet va lves A and B. 3. Attach gun fluid manif old. Connect gu n air line. Open air line valv e. 4. Set PRESSURE RELIEF/SPRA Y valv es (SA, SB) to SPRA Y . 5. Open air inlet ball va lve (DD). 6. ...
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Graco A-25 - page 25
Spraying 3A1569B 25 9. Slowly increase the air regulator setting until the appro ximate stall (static) pressure is achie ved on fluid gauges (GA) and (GB). 10. Chec k fluid pressure gauges (GA, GB) to en sure proper pr essure bala nce. If imbalanc ed, reduce pressure of higher compon ent b y slightly turning PRESSURE RELIEF/SPRA Y v a lve f or that ...
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Graco A-25 - page 26
Park 26 3A1569B Pa r k P ar k the p umps at th e end of the day to cycle propo r- tioner pumps t o home position, submerging displace - ment rod. 1. Open the park v alve . 2. T r igger the gun until pum ps stops at the bott om and relie ves pressure. 3. Close the air motor shuto ff valv e. 4. Close the par k valv e. Pressure Relief Pr ocedure The F ...
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Graco A-25 - page 27
Flushing 3A1569B 27 Flushing • Flush out old fluid with ne w fluid, or flush out old fluid with a compatib le moisture-free solv ent. • Use lowest possible pressur e when fl ushing. • T o flush feed hoses, pumps, and the heater sepa- rately fro m the heated hoses , set PRESSURE RELIEF/SPRA Y valv es (SA, SB) to PRESSURE RELIEF/CIRCULA TION. F ...
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Graco A-25 - page 28
Operation 28 3A1569B Operation Daily Start-up Procedure NO TE: The daily star t-up procedures describe normal operat ion. Assume that all temperatur e and pressure settings ha ve been pre viously set, b ut that the heating system is not up to oper ating temperature . 1. Check condition isocyanate lubr ication system and service as required. Change ...
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Graco A-25 - page 29
Operation 3A1569B 29 15. Chec k A and B fluid pressure gauges (GA, GB) to ensure proper pr essure balance between A and B. If imbalanced, b leed off the high side with va lves SA and SB until ba lanced. 16. Open gun fluid manif old v alves A and B . 17. Disengage gun pisto n safety loc k. 18. T est spray onto cardbo ard. 19. Equipment is r eady to ...
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Graco A-25 - page 30
Fluid Circulation 30 3A1569B Fluid Cir culation Cir culation Through Reactor T o circulate through gun manif old and preheat hose , see page 31. 1. F ollow Initial St ar tup , page 21. 2. See T ypical Installation, wi th Circulation , page 10. Route circulat ion lines bac k to respective com- ponent A or B supply dr um. Us e hoses rated at the maxi ...
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Graco A-25 - page 31
Fluid Circulation 3A1569B 31 Cir culation Through Gun Manif old Circulating fluid throu gh the gun manif old allows rap id preheating of hose . 1. Install gun fluid man ifold (P) on accessory circula- tion kit (CK). Connect high pressure circulation lines (R) to circulation ma nifold. 2. Route circulation lines bac k to respectiv e compo- nent A or ...
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Graco A-25 - page 32
DataTrak Controls and Indicators 32 3A1569B DataT rak Contro ls and Indicator s The DataT rak on the Reactor A-25 spra yers do not ha ve runa wa y protection. F or setup and operation instructions see DataT rak Operation , page 33. Key for F IG . 4 AB Combined Lower Displacement (user settable) A C Flow Rate Units (user settab le to gpm [US], gpm [ ...
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Graco A-25 - page 33
DataTrak Operation 3A1569B 33 DataT rak Operation NO TE: The display (AE) will turn off after 1 minute to sav e battery lif e. Press any k ey to w ake up the displa y . Setup Mode 1. See F IG . 4, pag e 32. Pre ss and hold for 5 sec- onds until Setup men u appears . 2. T o enter settin gs for low er size, flow r a te units, and disab le r unaw ay p ...
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Graco A-25 - page 34
Maintenance 34 3A1569B Maintenance • Chec k and add TSL to B side pump wet-cup dai ly . • Chec k ISO lube bottle f or significant discolor ation or cr ystallization daily . Replace with fresh TS L when needed. • Ensure ISO (A) pump is down an d in P ARK posit ion durin g e very shutdown. • K eep any ISO (A) flu id from being e xposed to atm ...
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Graco A-25 - page 35
Diagnostic Codes 3A1569B 35 Diagnostic Codes T emperature Control Dia gnostic Codes T emperature control dia gnostic codes appear on tem- perature display . These alarms tur n off heat. E99 clears automatically when commun ication is regained. Codes E03 throu gh E06 can be cleare d by pressing . For other codes, tur n main power OFF then ON to clea ...
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Graco A-25 - page 36
Dimensions 36 3A1569B Dimensions A B C With Wheels Without Wheels Dimension in. (mm) in. (mm) A 43.5 (1105 ) 43.5 (1105) B 29 (736.6) 21.5 (546) C 30 (762) 24.5 (622 ) ti17605a ...
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Graco A-25 - page 37
Technical Data 3A1569B 37 Te c h n i c a l D a t a *Full load amps with all de vices operating at maximum capabilities with 210 ft (64.1 m) of hose. ***210 ft (64 m) of hea ted hose will produce the ma ximum allo wable heat capacity . 3 10 ft (94 m) of heated hose ma y be used, but will ha ve 25% less heat capacity . Category Data Maximum Fluid W o ...
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Graco A-25 - page 38
All written and visual data con tained in th is document reflects the late st product information availabl e at the time of publica tion. Graco reserves the right to make changes at any time without notice. For patent information, see www.graco.com/pate nts. Original instructions. T his manual contains English. MM 3A1569 Graco Headquarters: Minneap ...
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