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021 a21-199 17: t,l[I,L134 ❑16 7 Bonding primary Thetable indicates thug adhesive pot life urtdervarious temperature condillmns.In hot systems(cont.) weather,pct trfe may be extended by wrapping a damp rag around the can of mixed adhesive or by spreading the adhesive on aluminum foR to dissipate the heat. Pot life/cure times for Arneron B20 adhesive Minimum Ambient Adhesive Minimum Joint Temperature Pot Ufe Cure Tine` (°F) (`C) (minutes) (hours) 40 5 70 12 SS 18 40 5 75 24 30 4 95 35 20 3 Comufstiva totals.Cum tirne at IMW temperatures geed not be uninterrupted,but totEd time mvat equek*e>afviated time before th9 system:s pressure tested. Force curing adhesive At temperatures below 40•F(5'C)or if the temperature Wit not be above 40°F(5°C) Temperatures may be lower ( during the entire period of cure,an extemat heat source must be used to force cure the than ambient ins;trench or I adhesive.The adhesive and the bonding surfaces should be wamied-to S0°F(t0`C) ou t cf direct sunlight. before miring and applying tete adhesive. L--------- J Below 407;S°C)force cure the adhesive with an external heat source such as: • Chem Cure Pak(US Pat,No.3,475,239) • Ameron heating blanket sufficiently large to cover the joint Forced air heater It the trench Is covered to contain tl;e heat • Hot air gun Using Chem Cure Pais with Ameron B20 adhesive The Chem Cure Pak is a self-contained,nonetectricai heat source for curing adhesive- bonded joints.irsttictcns are printed on the Pak wrapper.the Pak Is designed so that sufficient heat is generated to cure A heron 820 adhesive in one hour at amblent temperatures as low as 0°F(-1 WC).The Chem Cure Pak is manufactured iin different sizes corresponding to the diameter of the piping being irtstalen.Use the correct size Pak for your installation.Refer to table on page 11 when ordering. in cold waather,wrap insulation around the Pak as soon as it has stopped stemming. For lower temperatures or when installing extra-heavy fittings,corsuIt Ameron for r——————————— -� specific recommendations. Chem Cure Pak contains oxalic • Assemble pipe and fittings using staridard field fnstallatien procedures- acid.Harmful if swallowed.Causes I Mix the chemicals thoroucjhly as directedon the Pak wrapper. j skin and eye Irritation. L ____a�__r W Y�rJ Wrap the Pak around the catnections,centering it over the tapered section at the joint,not over the end of the fitting.Ccver the entire bonding area to which adhesive has been applied.Refer to Fig.7-1. 9 Use one Pak per bond:sleeve couplings in 3-inch sizes and larger require two Activator Paks.However,a single Pak is sufficient for curing both bonds in a 2-inch sleeve 1-insistrf :ynnge cqupling. r ■ Secure thQ Pak with tie wins, • Cut slits at least 1 inch wide(25 mm)on either side of the Pak. t Inject Water into the slits with the activator syringe or pQvr in a srnali amount from • acup. Tie wird czoterPsk over Aluminum Fail may be wrapped directhf over the joint to prevent I1 Pak from capered area, sticking if it is necessary that the expended Pak be removed from the trench. Fry 7-r Ttxd Chem Co-e3 Pakshould Follow the precautions printed on the Chem Cure Pak wrapper: produce steam rn about30 seconds.after injecting water.if no reaction occurs, Do not get ingredients an skin,in eyes.or on clothing. discard rhe Pak and use ariather or+e. Do not breathe dust or vapor. • Use only outdoors where~adequate ventilation is provided. • Do not take internally. • Keep out of reach of children. id