6QUIETCOOLSYSTEMS.COMVERY IMPORTANT: Make sure the fan blade spins freely.This is very important to system operationNOTE: Local building codes and standards must beadhered to in the installation of this unit.AVOID BACK DRAFTS: Care should be taken to avoidback drafting combustion appliances that are installedin the conditioned space. It is strongly recommendedthat combustion appliances NOT be installed in such a manner that they use room air forcombustion. Whole house fans are capable of pulling large quantities of air, from the homeand particularly if not enough windows are open. This could easily back draft gas applianceslocated inside your home.3. WIRINGNOTE: Wiring Diagrams are for examples only and wiring should be done by an experiencedelectrician!3.1. Single Speed WiringFor wiring of the ES-1500, ES-2250, & ES-3100 with one speed3.2. Two Speed WiringFor wiring of the ES-4700 with two speeds.3.3. Two Speed Wiring (ES-6400)For wiring of the ES-6400 double motorhead whole house fan with twospeeds.NOTE: The QuietCool whole house fans can be used with the included power cord with aplug outlet, but will only operate on high speed. The system will also work with a wirelesssystem using the power cord.