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IMPORTANT:Vent-free heaters add moisture to the air. Although this is beneficial, installing heater in rooms without enough ventilation air may cause mildew to form from too much moisture. See Air for Combustion and Ventilation, pages 5 through 7. CAUTION: If you install the heater in a home garage • heater pilot and burner must be at least 18 inches above floor. • locate heater where moving vehicle will not hit it. For convenience and efficiency, install heater • where there is easy access for operation, inspection, and service. • in coldest part of room. An optional fan kit is available from your dealer. See Accessories, page 21. If planning to use fan, locate heater near an electrical outlet. CEILING Minimum Minimum To Top Surface Of Carpeting, Tile or Other Combustible Material 36" 5" FLOOR 6" Minimum From Sides Of Heater Left Side Right Side Figure 10 - Mounting Clearances As Viewed From Front of Heater 104779 8 OWNER’S MANUAL INSTALLATION Continued THERMOSTAT SENSING BULB The thermostat sensing bulb has been placed inside the heater for protection during shipping. Locating Thermostat Sensing Bulb 1. Remove front panel of heater (see Figure 2, page 4). 2. Locate thermostat sensing bulb just under burner assembly. IMPORTANT: Attach thermostat sensing bulb to back of heater for proper operation. Attaching Thermostat Sensing Bulb 1. Remove thermostat sensing bulb from holders inside heater. Route through slot opening in bottom of heater. 2. Place clamp on thermostat sensing bulb as shown in Figure 11. Clamp is provided in hardware package. INSTALLATION OPTIONS There are three options for mounting this heater. A. Mounting heater to wall B. Mounting heater to optional hearth base C. Mounting heater with optional hearth base to optional mantel A. MOUNTING HEATER TO WALL Mounting Bracket The mounting bracket is located on back panel of heater. It has been taped there for shipping. Remove mounting bracket from back panel. Mounting Bracket Figure 12 - Mounting Bracket Location Marking Screw Locations 1. Tape mounting bracket to wall where heater will be located. Make sure mounting bracket is level. WARNING: Maintain minimum clearances shown in Figure 13. If you can, provide greater clearances from floor and joining wall. 2. Mark screw locations on wall (see Figure 13). Note:Only mark last hole on each end of mounting bracket. Insert mounting screws through these holes only. 3. Remove tape and mounting bracket from wall. 20 3/4" 11" 16" Adjoining WallOnly Insert Mounting Min. Screws Through Last Hole On Each End Min. 3. Snap clamp into upper mounting hole as shown in Figure 11. Mounting hole is located on lower left edge on back of heater. Make sure the thermostat sensing bulb is pointing up. Thermostat Sensing Bulb Clamp Figure 11 - Attaching Thermostat Sensing Bulb Methods For Attaching Mounting Bracket To Wall Only use last hole on each end of mounting bracket to attach bracket to wall. These two holes are 16 inches apart from their centers. Attach mounting bracket to wall in one of two ways. 1. Attaching to wall stud 2. Attaching to wall anchor Attaching to wall stud This method provides the strongest hold. Insert mounting screws through mounting bracket and into wall studs. Attaching to wall anchor This method allows you to attach mounting bracket to hollow walls (wall areas between studs) or to solid walls (concrete or masonry). Decide which method better suits your needs. Either method will provide a secure hold for the mounting bracket. Floor Figure 13 - Mounting Bracket Clearances Continued 9 15,000 TO 28,000 BTU/HR VENT-FREE NATURAL GAS HEATER INSTALLATION Continued Attaching Mounting Bracket To Wall Note:Wall anchors, mounting screws, and spacers are in hardware package. The hardware package is provided with heater. Attaching to wall stud method For attaching mounting bracket to wall studs 1. Drill holes at marked locations using 9/64" drill bit. 2. Place mounting bracket onto wall. Line up last hole on each end of bracket with holes drilled in wall. 3. Insert mounting screws through bracket and into wall studs. 4. Tighten screws until mounting bracket is firmly fastened to wall studs. Attaching to wall anchor method For attaching mounting bracket to hollow walls (wall areas between studs) or solid walls (concrete or masonry) 1. Drill holes at marked locations using 5/16" drill bit. For solid walls (concrete or masonry), drill at least 1" deep. 2. Fold wall anchor as shown in Figure 14. 3. Insert wall anchor (wings first) into hole. Tap anchor flush to wall. 4. For thin walls (1/2" or less), insert red key into wall anchor. Push red key to “pop” open anchor wings. IMPORTANT:Do not hammer key! For thick walls (over 1/2" thick) or solid walls, do not pop open wings. 5. Place mounting bracket onto wall. Line up last hole on each end of bracket with wall anchors. 6. Insert mounting screws through bracket and into wall anchors. 7. Tighten screws until mounting bracket is firmly fastened to wall. Figure 14 ...