Removal and Installation Installation of APS WARNING When Installing the Air Pressurization System make sure the tube and wires are placed in the dedicated slots and perform the following steps: 1. Before installing the APS on the ISS, insert first the 3 cables and then the tube in the dedicated slot. 2. Install the APS on the ISS. 3. For the 42" Model, secure the APS Cables to the ISS using the Cable Clip under the ISS. NOTE Before installing the ISS on the Printer, make sure the cable and tube are inserted in the ISS slot. 8-68 HP DesignJet 5000 and 5500 Series Printers Service Manual