426e30bl025.10135Illustration 1: Direction of Airflow with Kit Installed1 Top cover2 Frequency converter enclosure3 Lower duct4 Back vent5 Cooling back channel6 Airflow direction1.2 Kit NumbersUse these instructions with the following kits.Table 1: Numbers for In-back/Out-back Cooling KitsNumber Kit description176F4184 FK09a/FB09a in-back/out-back cooling kit176F4185 FK10a/FB10a in-back/out-back cooling kit1.3 Items SuppliedTable 2 provides a list of items included in the kit. Refer also to 2.2 Installation Overview.AN440656954288en-000101 / 136R0326 | 1Danfoss A/S © 2023.09Installation GuideIn-back/Out-back Cooling Kitfor FK09a/FB09a and FK10a/FB10aiC7 Series Frequency Converters1 Overview1.1 DescriptionThe in-back/out-back cooling kit fits iC7 Series FK09a/FB09a and FK10a/FB10a Frequency Converters. When the kit is installed, airflows into the lower duct and out through the upper back vent. See Illustration 1.