Bard WA611 Installation Instructions Manual

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Bard WA611 Installation Instructions Manual Manual pdf 9 page image

Manual 2100-425Page 7WALL MOUNTING INFORMATION1. Two holes, for the supply and return air openings,must be cut through the wall as shown in Figure 3.2. On wood-frame walls, the wall construction mustbe strong and rigid enough to carry the weight ofthe unit without transmitting any unit vibration.See Figures 4 and 5.INSTALLATION INSTRUCTIONS4. Mount bottom mounting bracket.5. Hook top rain flashing under back bend of top.Top rain flashing is shipped secured to the rightside of the back.6. Position unit in opening and secure with 5/16 lagbolts; use 7/8 inch diameter flat washers on the lagbolts.7. Secure rain flashing to wall and caulk across entirelength of top. See Figure 3.8. For additional mounting rigidity, the return air andsupply air frames or collars can be drilled andscrewed or welded to the structural wall itself(depending upon wall construction). Be sure toobserve required clearance if combustible wall.9. On side by side installations, maintain a minimumof 20 inches clearance on right side to allow accessto heat strips and control panel and to allow properairflow to the outdoor coil. Additional clearancemay be required to meet local or national codes.TYPICAL INSTALLATIONSSee Figure 6 for common ways to install the wall-mount unit.WIRING — MAIN POWERRefer to the unit rating plate for wire sizinginformation and maximum fuse or “HACR" typecircuit breaker size. Each outdoor unit is marked witha “Minimum Circuit Ampacity”. This means that thefield wiring used must be sized to carry that amount ofcurrent. Depending on the installed KW of electricheat, there may be two field power circuits required. Ifthis is the case, the unit serial plate will so indicate. Allmodels are suitable only for connection with copperwire. Each unit and/or wiring diagram will be marked“Use Copper Conductors Only”. These instructionsmust be adhered to. Refer to the National ElectricalCode (NEC) for complete current carrying capacitydata on the various insulation grades of wiringmaterial. All wiring must conform to NEC and alllocal codes.The electrical data lists fuse and wire sizes (75ºCcopper) for all models, including the most commonlyused heater sizes. Also shown are the number of fieldpower circuits required for the various models withheaters.3. Concrete block walls must be thoroughly inspectedto insure that they are capable of carrying theweight of the installing unit. See Figure 4.MOUNTING THE UNIT1. These units are secured by wall mounting bracketswhich secure the unit to the outside wall surface atboth sides. A bottom mounting bracket is providedfor ease of installation.2. The unit itself is suitable for “0” inch clearance,but the supply air duct flange and the first 3 feet ofsupply air duct require a minimum of 1/4 inchclearance to combustible material. If a combustiblewall, use a minimum of 30-1/2" x 10-1/2"dimensions for sizing. However, it is generallyrecommended that a 1 inch clearance is used forease of installation and maintaining the requiredclearance to combustible material. The supply airopening would then be 32" x 12". SeeFigures 3, 4 and 7 for details.3. Locate and mark lag bolt locations and bottommounting bracket location. See Figure 4.WARNINGFire hazard can result if 1/4 inch clearance tocombustible materials for supply air duct isnot maintained. See Figure 3.WARNINGFailure to provide the 1/4 inch clearancebetween the supply duct and a combustiblesurface for the first 3 feet of duct can result infire.