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7 Bonding primary systems (cont'd.) At �V Fig. 7-1. During primary assembly, closure piece, nut and small0-ring are moved away from fitting. Lightly re -assemble pieces onto fitting when bond is first made to check proper alignment of joint. Fig. 7-2. Completely wet all matching surfaces with the adhesive. Wipe off excess adhesive with the spatula provided in the kit. r----------- n Do not use anytype of hammer i or mallet to make up the joint. L----------- J 10 Applying Ameron adhesive PSXTM'•20 and PSXTMe34 adhesives contains grit to aid in installation. Excessive amounts of adhesive may (1) cause flow restriction inside the pipe when the adhesive has cured, (2) block the opening of the containment pipe, or (3) result in `hydraulic backout' as the adhesive cures. Hydraulic backout occurs when excess adhesive prevents the joint from maintaining an interference fit and the spigot backs out of the bell during cure. The inclusion of grit reduces this possibility significantly. Remove closure assembly from fitting and slide all parts (threaded nut, small O-ring and threaded closure) onto the appropriate pipe legs. Temporarily secure these parts in place by hand tightening the nut on the closure with small O-ring in place. The large O-ring can be left in place on the containment fitting unless it is excessively dirty. Coat the tapered surface and cut end of the primary pipe or the entire tapered section of adapters with adhesive. Apply a thin, even coat of mixed adhesive to the inside of the bell of fittings. Completely wet all matching surfaces with the adhesive. Wipe off excess adhesive with the spatula or brush provided in the kit. At fittings where the containment is to be terminated, take care when applying adhesive so excess adhesive does not get on primarypipe where termination sleeves will need to seal. Also, the gap between the 2 -inch LCX coupling sleeve and the primary sleeve coupling is small. Excess adhesive on these bonds can prevent the coupling sleeve from slipping into place without having to sand down the high spots. Making the joint After aligning the mating surfaces so that they may be brought together in a straight line: • Insert spigot all the way into the bell. • Twist one quarter of a tum when possible, while pushing together to distribute adhesive evenly and to achieve an interference fit. A slight reverse twist will then lock the joint. • Remove any excess adhesive. • Do not cock the joint. • Hand tighten the LCX closure onto the fitting while joint is curing. This will assure alignment and prevent cocked joints. • Over -insertion of the joint may collapse the spigot and cause a leaky joint. • Under -insertion of the joint may also cause a leaky joint. • Do not drive the joint together with a hammer. • Do not disturb the joint while the adhesive is uncured. • Do not move adjacent pipe and fittings until adhesive has set. Pot fife/cure times for Ameron adhesive Pot life is measured from the time the hardener and resin are first mixed until the adhesive starts to thicken and harden and no longer can be used. Do not use adhesive once the can has become hot. The table indicates the adhesive pot life under various temperature conditions. In hot weather, pot life may be extended by wrapping a damp rag around the can of mixed adhesive or by spreading the adhesive on aluminum foil to dissipate the heat. Pot life/cure times for Ameron adhesive Minimum Ambient Adhesive Minimum Joint Temperature Pot Life Cure Time' (°F) (°C) (minutes) (hours) 40 5 70 12 65 18 40 5 75 24 30 4 95 35 20 3 Cumulative totals. Cure time at listed temperatures need not be uninterrupted, but total time must equal the tabulated time before the system is pressure tested.