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INSTALLATION —CONTINUED <br />Heater Suspension —Continued <br />Suspension of Heater with Downturn Nozzle <br />Downturn nozzle kits (option CD2, CD3, CD4, or CD5) require four -point suspension. Follow the instructions provided <br />with the kit for downturn nozzle installation. <br />Suspension of Heater Using Option CK8 or CK10 Hanger Kit <br />Options 01<8 (two -point suspension) and CK10 (four -point suspension) are for suspending the heater using swivel <br />connectors connected to 1-inch pipe. Attach the swivel connectors at the 3/8-16 threaded nut retainers. Ensure that <br />the swivel connectors are locked to the heater as shown in Figure 6. <br />Figure 6. Option CK8 or CK10 Hanger Kit <br />Suspension of Heater Using Option CK22 Hanger Kit <br />The ceiling suspension kit (option CK22, see Figure 7) allows the heater to be installed 1 inch from the ceiling without <br />hanger rods. The ceiling suspension kit is used only on unit sizes 030--125 for UDX and UDZ models. Refer to the <br />installation instructions provided with the kit. <br />Figure 7. Option CK22 Hanger Kit <br />Heater Suspension Using Field -Supplied Threaded Rods <br />The heater may be suspended from 3/8-inch threaded rods using either two- or four -point suspension. The <br />recommended maximum rod length is 6 feet (1.8 meters). The length of the threaded rod extending into the heater <br />MUST NOT exceed 1 /2 inch (13 mm). Ensure that the threaded rods are locked to the heater as shown in Figure 8. <br />18 UBX-UBZ-UDX-UDZ-iOM (12-22) 1034344-1 <br />