Bard H24A2-A Manual

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Bard H24A2-A Manual Manual pdf 6 page image

Manual 2100-585CPage 6 of 22INSTALLATIONWARNINGFailure to provide the 1/4 inch clearancebetween the supply duct and a combustiblesurface for the first 3 feet of duct can result infire causing damage, injury or death.WALL MOUNTING INFORMATION1. Two holes for the supply and return air openingsmust be cut through the wall as shown in Figure 2.2. On wood frame walls, the wall construction must bestrong and rigid enough to carry the weight of theunit without transmitting any unit vibration.3. Concrete block walls must be thoroughly inspectedto insure that they are capable of carrying theweight of the installed 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, attachedto skid for shipping, is provided for ease ofinstallation, but is not required.2. The unit itself is suitable for 0 inch clearance,but the supply air duct flange and the first 3 feetof supply air duct require a minimum of 1/4 inchclearance to combustible material for model seriesH36, H42, H48 and H60. However, it is generallyrecommended that a 1-inch clearance is used forease of installation and maintaining the requiredclearance to combustible material. See Figures2A-C for details on opening sizes.3. Locate and mark lag bolt locations and bottommounting bracket location. See Figure 2.4. Mount bottom mounting bracket.5. Hook top rain flashing, attached to front - right ofsupply flange for shipping, under back bend of top.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 2.8. For additional mounting rigidity, the return airand supply air frames or collars can be drilledand screwed 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 control panel and heat strips, and to allow properairflow to the outdoor coil. Additional clearancemay be required to meet local or national codes.10. Care should be taken to ensure that the recirculationand obstruction of condenser discharge air does notoccur. Recirculation of condenser discharge aircan be from either a single unit or multiple units.Any object such as shrubbery, a building or otherlarge object can cause obstructions to the condenserdischarge air. Recirculation or reduced airflow causedby obstructions will result in reduced capacity,possible unit pressure safety lockouts and reducedunit service life.For units with blow through condensers, it isrecommended there be a minimum distance of 10'between the front of the unit and any barrier or 20'between the fronts of two opposing (facing) units.NOTE: For side by side installation of two (2) H**A models theremust be 20" between units. This can be reduced to 15" by usinga H**L model (left side compressor and controls) for the left unitand H**A (right side compressor and controls) for right unit.Clearances Required for Service Accessand Adequate Condenser AirflowMODELS LEFTSIDERIGHTSIDEDISCHARGESIDEH24A, H36A 15" 20" 10'H24L, H36L 20" 15" 10'H42A, H48A, H60A 20" 20" 10'H42L, H48L, H60L 20" 20" 10'Minimum Clearances Required toCombustible MaterialsMODELS SUPPLY AIR DUCTFIRST THREE FEET CABINETH24A, H24L 0" 0"H36A, H36L 1/4" 0"H42A, H42LH48A, H48LH60A, H60L1/4" 0"