Liebert Challenger 3000 with iCOM

Split System Models7.5 Centrifugal Air-Cooled Condensing Units7.5.1 Installing the Indoor Condensing UnitRefer to drawings for unit dimensions and component locations.! WARNINGRisk of heavy unit falling from supports. Can cause equipment and building damage, injuryand death.Be sure the supporting roof structure is capable of supporting the weight of the unit(s) andthe accessories during installation and service. (See Table 30 - Indoor centrifugalcondensing unit.)Be sure to securely anchor the top ends of the suspension rods. Make sure all nuts are tight.The indoor condensing unit is usually mounted above the ceiling and must be securely mounted to theroof structure. The ceiling and ceiling supports of existing buildings may require reinforcements. Besure to follow all applicable codes. Use field-supplied threaded suspension rods and 3/8"-16 factoryhardware kit.The indoor condensing unit must be located at the same level or above the Liebert Challenger 3000unit. It must NOT be located below the Liebert Challenger 3000.Recommended clearance between ceiling grids and building structural members is unit height plusthree inches.Install the four field-supplied rods by suspending them from suitable building structural members.Locate the rods so that they will align with the four mounting holes in the flanges that are part of theunit base.Using a suitable lifting device, raise the unit up and pass the threaded rods through the fourmounting holes in the flanges that are part of the unit base.Attach the threaded rods to the unit flanges using the supplied nuts and grommets. (See Figure 35 -Detail of ceiling hanging bracket, Threaded Rod and Hardware Kit Installation). The rubbergrommets provide vibration isolation.1. Use the plain nuts to hold unit in place. Adjust these nuts so that the weight of the unit issupported evenly by the four rods, does not rest on the ceiling grid, and is level.NOTEThe units must be level in order to operate properly.2. Use the Nylock nuts to “jam” the plain nuts.Table 30 Indoor centrifugal condensing unitModel60 Hz 50 HzNet Weightlb (kg)MC_40A MC_39A 240 (109)MC_65A MC_64A 449 (204)65