Hello, and welcome to the Owner Guide for your 3000 Series Refinery Stack and 4800 Series Chemical Plant Stack (and supporting industry). This guide will provide you with all the necessary information to start up and care for your new industrial workhorses. 1. Heavy Oil must be separately provided to the refinery stack internal oil circuit; this stack is NOT self-starting. 2. The oil pipes are meant to meet on the right side of the Chemical Plant Stack and the left side of the Refinery Stack.