1.Before installation, you need to make sure that the FRL unit is clean and dust free. And ensure that the working pressure is within the FRL pressure range.

2.When installation, do carefully notice that the direction of air flow is connected properly. Connect the inlet air to the “IN” side. Otherwise,the FRL unit can not achieve the purpose of air preparation.

3.If you want to re-arrange or re-assembly the FRL units, you can put the FRL unit to be joined together side by side and insert a proper size spacer( with gasket pre-installed) in between the units. Align and butt the units together. Join and fasten the units together using the front and back special purpose mounting brackets. Tighten the screws on the front and back brackets until the units are aligned and tightly joined together.