INSTALLATION INSTRUCTIONS
1. Mark the installation point and if necessary, drill a pilot hole through the wall using a long drill bit. Follow the pilot hole with a hole saw.
2. Meet the hole from the outside, in order to keep the wall surfaces intact.
3. Measure the thickness of the wall. Adjust the length of the telescopic pipes according to the wall thickness. If necessary, the pipes can be shortened. Fit the wall pipe VR-80 and extension pipe FR-80 to the lead through.
4. Attach the wall pipe VR-80 to the wall with screws. Place the flter close to the outer wall.
5. Fit the manual valve tightly into the lead through.
6. Fit the outside grille YG-80 into the lead through from the outside of the wall. It is recommended to attach YG-80 to the outer wall using installation glue.



