During the model selection of the AC modular units, how should we determine if the lubricator is nec

If you use the lube type actuator, the lubricator is necessary. 
If the non-lube type actuator is used, the lubricator is not necessary. 
However, you can use the lubricator with non-lube type actuator in order to increase product life. 
NOTE: Once you use the lubricator, it is necessary to maintain lubrication as the grease inside the actuator might wear out.

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