14Kaden Installer's ManualDucted Gas Heaters2.4 EXTERNAL INSTALLATION2.4.1 Supply Air Overheat Switch Position (KU530 & KU330 ONLY)For external installations of the KU530 (refer to Diagram 5) and KU330 (refer to Diagram 6) heaters the supply airoverheat switch position must be changed from end discharge to side discharge modify as follows:2.4.1.1 KU5301. Disconnect the quick connect terminals (Orange / White) for the overheat switch loom connected from theend discharge overheat switch behind the burners.2. Reconnect the quick connect terminals (Orange / White) to the side discharge overheat switch. Theseterminals can be identified by the label "SIDE DISCHARGE O/H SWITCH".Flue TerminalConnectionKU530 End Discaharge O/H Switchquick connect terminals(factory default connection)Side Discharge O/H Switchquick connect terminals12O/H Switch LoomDiagram 52.4.1.2 KU3301. Disconnect the quick connect terminals (Orange / White) for the overheat switch loom connected to the enddischarge overheat switch behind the burners.2. The KU330 is fitted with both left and right side discharge O/H Switches, reconnect the quick connectterminals (Orange / White) to the O/H Switch on the same side the air is supplied from. These terminals canbe identified by labels on the sheet metal plate above the burner "LEFT SIDE DISCHARGE O/H SWITCH"or "RIGHT SIDE DISCHARGE O/H SWITCH".Flue TerminalConnectionKU330 Left Side Discharge O/HSwitch quick connect terminals122LREnd Discaharge O/H Switchquick connect terminals (factorydefault connection)O/H Switch LoomRight Side Discharge O/HSwitch quick connect terminalsDiagram 62.4.2 Modifying KU Model Duct OrientationThe duct orientation of KU series heaters can be reversed if the installation requires it. For more information referto "2.3.3 Return & Supply Air POP Rotation Procedure" on page 12.