23W415-0773 / E / 03.13.12Example:V1 = 1.5 FTV2 = 5 FTVT = V1 + V2 = 1.5 + 1 + 5 = 6.5 FTH1 = 1 FTH2 = 1 FTH3 = 10.75 FTHR = H1 + H2 + H3 = 1 + 1 + 10.75 = 12.75 FTH O = .03 (four 90° elbows + one 45° elbow - 90°)= .03 (360° + 45° - 90°) = 6.75 FTH T = HR + HO = 12.75 + 6.75 = 19.5 FTH T + VT = 19.5 + 6.5 = 26 FTFormula 1:HT < 3 VT3 VT = 3 x 6.5 = 19.5 FT19.5 = 19.5Formula 2:H T + VT < 40 FT26 < 40Since both formulas are met, this vent configuration is acceptable.90°V 1V2H 1H 290°90°H345°18.2_34.0 PRE-INSTALLATION PREPARATION4.1 GD36 REAR EXIT4.2 GD36 TOP EXIT! WARNINGFAILURE TO INSTALL THE CAP WILL CAUSE THE APPLIANCE TO FUNCTION IMPROPERLY ANDCAN CAUSE INJURY OR PROPERTY DAMAGE.A. Remove the baffle from the back of the firebox by removingthe four screws.B. From inside the firebox, insert the 4" flue pipe / gasketassembly (provided) through the rear of the firebox. Securethe flue pipe assembly to the rear and top of the applianceusing 4 #8 x ¾ inch Hex Head Wildrill screws supplied.NOTE: Do not overtighten. The gasket needs only to besnug against the firebox.C. Before attaching elbows to the collars on the back of the appliance, 1½" willneed to be trimmed off the 4" collar.D. Re-attach the baffle to the back of the firebox using the four screws.Remove the baffle from the back of the firebox by removing the four screws.A. Remove the 7" diameter cap from the top of the appliance and re-secure itover the 7" collar located at the rear of the appliance. Press firmly on the capwhile securing to ensure an airtight seal. Do not damage the gasket.B. Remove the plate covering the 4" diameter flue opening (seen inside the topof the 7" diameter collar) and discard. Try not to disturb the retaining ring orthe gasket beneath. Re-secure the ring and gasket using the screws removedfrom the plate.C. From inside the firebox, insert the 4" flue pipe / gasket assembly through the heat shield and outthrough the retaining ring. Secure the assembly to the rear and top of the appliance using 4 #8 x ¾"Hex Head Wildrill screws supplied. Do not overtighten. The gasket needs only to be snug against thefirebox. Re-attach the baffle to the back of the firebox using the four screws.BAFFLEBAFFLESCREWS