Bard WA302 Installation Instructions Manual

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Bard WA302 Installation Instructions Manual Manual pdf 8 page image

Manual 2100-404Page 6INSTALLATION INSTRUCTIONSWALL 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 must bestrong and rigid enough to carry the weight of theunit without transmitting any unit vibration.WARNINGFire hazard can result if 1/4 inch clearance tocombustible materials for supply air duct is notmaintained. See Figure 3.3. Concrete block walls must be thoroughly inspected toinsure that they are capable of carrying the weight ofthe installing unit.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, but is not required.2. The unit itself is suitable for “0” inch clearance, butthe 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 28-1/2" x 8-1/2" dimensionsfor sizing. However, it is generally recommended thata 1 inch clearance is used for ease of installation andmaintaining the required clearance to combustiblematerial.TOP OUTLET ONLY1. Remove airframe angles from the back of the unit.2. Coat angles with two 1/8" beads of silicone asshown. Silicone is shipped in the control panel. SeeFigure 5.3. Secure angles to the top of the unit with 14 screwsprovided. Use of prepunched holes provided. Do notrelocate. See Figure 5.4. After installation duct work, seal around airframeand duct work to provide a rain tight seal.5. It is strongly recommended, but not required, thatthis unit be installed under a soffit area large enoughto shield the top of the unit. See Figure 6.WIRING — MAIN POWERRefer to the unit rating plate for wire sizing informationand maximum fuse or “HACR Type” circuit breakersize. Each outdoor unit is marked with a “MinimumCircuit Ampacity”. This means that the field wiringused must be sized to carry that amount of current.Depending on the installed KW of electric heat, theremay be two field power circuits required. If this is thecase, the unit serial plate will so indicate. All modelsare suitable only for connection with copper wire. Eachunit and/or wiring diagram will be marked “Use CopperConductors Only”. These instructions must be adheredto. Refer to the National Electrical Code (NEC) forcomplete current carrying capacity data on the variousinsulation grades of wiring material. All wiring mustconform to NEC and all local codes.WARNINGFailure to provide the 1/4 inch clearancebetween the supply duct and a combustiblesurface for the first 3 feet of duct can result infire.3. Locate and mark lag bolt locations and bottommounting bracket location. See Figure 3.4. Mount bottom mounting bracket, if used The supplyair opening would then be 30" x 10". See Figures 3and 4 for details.5. Hook top rain flashing under back bend of top. Toprain flashing is shipped secured to the right side ofthe 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 of combustible wall.9. On side by side installations, maintain a minimum of20 inches clearance on right side to allow access toheat strips and control panel and to allow properairflow to the outdoor coil. Additional clearance maybe required to meet local or national codes.