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7 Bonding primary systems (cont'd.) Fig. 7-3. Place the thermostat end of the blanket against the joint with thermostat facing out. Wrap the rest of the blanket around the joint so that the overlap covers the thermostat. r-----------� Temperatures in a trench or out 1 of direct sunlight maybe lower 1 than measured ambient surface temperatures. 1 L -----------J Fig. 7-4. When it is windy or below 50°F (10°C), close the pipe ends and insulate around the blanket. Overlap the blanket about 4 inches on each side and tie down the ends of the insulation. Force curing adhesive At temperatures below 40°F (5°C) or if the temperature will not be above 40°F (5°C) during the entire period of cure, an external heat source must be used to force cure the adhesive. The adhesive and the bonding surfaces should be warmed to 50°F (10°C) before mixing and applying the adhesive. Below 40°F (5°C) force cure the adhesive with an external heat source such as: Ameron LCX heating blanket Forced air heater if the trench is covered to contain the heat Hot air gun Using Ameron heating blankets Ameron heating blankets provide an efficient means for curing adhesive -bonded joints. A size 1 heat blanket is needed for installing Dualoy 3000/LCX systems. It is narrower than standard heating blankets to allow application in close quarters without allowing the heating blanket to overlap the threaded closure. Overwrapping can result in melted parts if the blanket is improperly applied or the thermostat malfunctions. If overwrapping cannot be avoided, make sure the blanket is properly applied and place a layer of insulating material between the blanket and the threaded closure. The heating blanket reaches a maximum temperature of 300°F (150°C), which will cure Ameron adhesive in approximately 30 to 40 minutes. Detailed instructions are included with the blanket. Observe the following points: • Use one heating blanket per bond. • Tie the blanket in place with nonconducting ties. • Before connecting to a power source, inspect the blanket and cord for loose wire connections and bare wires. • Do not plug the cord into a power source when standing in water or on a wet surface. • Check that the heating blanket has the correct AC voltage rating for your locality. Do not use direct current. • Mark the starting and disconnect time on the pipe with a grease pencil so that you will have a record of cure for each joint. • Verify that the blanket actually heats up after being plugged in. • Do not move or disturb the joint during cure. Fiberglass insulation backed by aluminum foil 4 F Eli= Connecting to non-Ameron fiberglass primary piping Connect Dualoy 3000/LCX fiberglass piping and non-Ameron UL -listed fiberglass primary piping by means of threaded adapters. Do not adhesive bond Ameron piping to that of another manufacturer. Bond the appropriate adapter from each manufacturer to the manufacturer's pipe using that manufacturer's adhesive. Complete the threaded connection using thread sealant, not pipe adhesive. By following this procedure you can use Dualoy 3000/LCX piping to extend an existing line that employs the pipe from another manufacturer without voiding the UL Listing of either system. lJ