Install instructions for the IVT Geo XXX, Air X, Vent 202, Airbox and Bosch Compress 7000 LWM and AW systems.

Thank you for purchasing our interfacing solution for IVT/Bosch heat pumps. The interface is easy to install.

There are two versions of the cable. The older style has a 3,5mm plug and the newer connect directly to the terminal of the pump controller with 3 cables. We have changed because of circumstances where Bosch has wired the 3,5mm jack incorrectly from factory resulting in destroying the H66.

• Power down the heat pump and open the front cover
• Locate the gray main unit and its terminal marked EMS. (See picture)
  The White cable connects to No23 BBT
  The Blue cable connects to No24, BBT gnd
  The Purple cable connects to No25 BBT 12VDC
  
  Just add these cables in parallel with the current ones.
  If you want you can also remove the current cables as they are not in use. They only goes to a service connector. Please note the table below which gives alternative connection points.

• Plug in the interface module to the H66
• Close the front cover of heatpump and power it up