7–13 T-359c. Determine which heater(s) need replacing by checking resistance of each heater set. Refer to Section 3.3for heater resistance values. Once the set containing the failed heater is determined, cut the splice connec-tion and retest to determine the actual failed heater(s).To remove U-shaped heater:1. Remove hold-down clamp securing heater(s) to coil.2. Lift the bent end of the heater (with the opposite end down and away from coil). Move heater to the sideenough to clear the heater end support and remove.3. To replace a heater, do steps 1 through 2 in reverse.To remove straight heater:1. Locate holding clips positioned at the ends of the heater element.2. Rotate clips toward the center of the container unit.3. Lift heater slightly up and out to remove.4. To replace a heater, do steps 1 through 3 in reverse.To remove Omega heater (see Figure 7.7):1. Remove the two tube clamps located near the top of the heater element.2. Locate holding clips positioned at the bottom of the heater element and rotate slightly toward the center ofthe container unit.3. Carefully pull heater out to remove.4. To replace a heater, do steps 1 through 3 in reverse.Figure 7.7 Heater Arrangement - Omega Heater7.10 EVAPORATOR FAN AND MOTOR ASSEMBLYThe evaporator fans circulate air throughout the container by pulling air in the top of the unit. The air is forcedthrough the evaporator coil where it is either heated or cooled and then discharged out the bottom of the refrigera-tion unit into the container. The fan motor bearings are factory lubricated and do not require additional grease.1. 2.3.Omega Heater Tube Clamps (2)Holding Clips (2)
