www.desatech.com108795-01V 11CHECKING FOR PROPER VENTINGAfter completing and checking electrical,gas and vent connections, follow the lightinginstructions and allow main burner to runfor approximately 5 minutes. Hold a lightedmatch or cigarette near the top edge of fire-place opening and play it along entire lengthof opening (see Figure 12). Proper ventingshould tend to draw the flame or smoke intothe appliance. Improper venting or escapingof spillage of burned gas, is indicated whenthe match flickers or goes out. Smoke from acigarette will also tend to disperse away fromthe appliance.If appliance is found to be improperly vent-ing, shut it off and notify your installer or aqualified service agency to inspect the vent-ing system.VeNtING INstallatIoNContinuedCheck this areaalong entire topedge of fireplaceopening. Smokeor flame should bedrawn into applianceopening.Figure 12 - Checking for SpillageINstallatIoNFigure 13 - Removing Front RefractoryAccess PanelNOTICE: This appliance isequipped with a vent safetyshutoff switch which will shutdown the appliance in the caseof a venting problem. Do notbypass the vent safety switch. Ifthe appliance should shut down,contact a qualified installer, ser-vice agency or your gas supplierto have the vent inspected beforeoperating.WALL SWITCH INSTALLATIONThe installation of a wall switch allows you toactivate the gas control valve without normalhousehold electricity since valve operates onmillivolt current supplied by heat generated bythe thermopile. To install wall switch:1. Remove front refractory access panel bylifting up and angling out of firebox open-ing (see Figure 13).2. Use wire and connectors provided. Attachred wire to terminal marked TH/TP oncontrol valve. Attach white wire to bladeconnector on open end of safety circuitwiring (see Wiring Diagram, page 22).Note: If any of the original wire from unit con-trol must be replaced, use the same type or ahigher rated wire (25 ft. maximum length).WARNING: Do not wire re-mote wall switch to main powersupply (Standard 120v house-hold current).3. Locate wall switch in a convenient location.4. After wire connections are complete,replace refractory access panel.