Bard MULTI-TEC W24AAPA Installation Instructions Manual

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Bard MULTI-TEC W24AAPA Installation Instructions Manual Manual pdf 56 page image

Manual 2100-676BPage 56 of 882. If desired, hook top rain flashing under back bendof top.3. Position unit in opening and secure with fastenerssufficient for the application such as 5/16" lag/anchor bolts; use 7/8" diameter flat washers onthe lag bolts. It is recommended that a bead ofcommercial grade outdoor silicone sealant caulk beplaced behind the side mounting flanges.NOTE: Opening and removing the filter access doorfrom each side may make fastening unit to walleasier.4. Secure optional rain flashing to wall and caulkaround entire unit (see Figure 8).5. 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.6. Four plastic drain hoses extend from the condenserand evaporator drain pans. The drain hoses aresecured to fittings mounted to the unit base.NOTE: At the time of installation, Bard highlyrecommends prefilling of the traps on both ofthe indoor drain pan hoses to ensure proper unitdrainage at start. The water traps can easilybe seen with the front service panel removed.To fill traps, pour water into both sides ofevaporator drain pan until the drain hoses arevisibly full (see Figure 3).A unique feature of the WR Series wall-mount unit isthe ability to hang the front service panel on the unitin a position that allows full access to the control panel(see Figure 4) while the unit remains fully functionalfor troubleshooting and testing. To do this, remove thepanel and hook top lip of panel into bottom channelof control panel. For added front panel stability, useseveral of the screws that were removed to temporarilyconnect the panel to the unit.Mounting the UnitsNOTE: It may be best to spot some electrical knockouts(such as those located on the sides of thewall-mount unit) before units are mounted andaccess is unavailable or limited (see Figure 2 tolocate pre-punched knockouts).Two holes for the supply and return air openings mustbe cut through the wall as shown in Figure 8 on page59. On wood frame walls, the wall construction mustbe strong and rigid enough to carry the weight of theunit without transmitting any unit vibration. All wallsmust be thoroughly inspected to ensure that they arecapable of carrying the weight of the installed unit.In retrofit (unit replacement) installations, the openingscut for the original equipment may not line up exactlywith needs of this installation. Modifications may needto be made, such as increasing or decreasing the sizeof the wall cutouts. The existing bolt placement maynot line up in which case the original bolts would needto be removed or cut away.These units are secured by full-length mounting flangesbuilt into the cabinet on each side. An optional bottommounting bracket (purchased separately) is available,but not required.The unit itself is suitable for 0" clearance, but thesupply air flange requires a minimum of 1/4" clearanceto combustible material. However, it is generallyrecommended that a 1" clearance is used for ease ofinstallation and maintaining the required clearanceto combustible material. See Figure 8 for details onopening sizes.IMPORTANT: When removing the shipping pallet frombeneath the wall unit, do not loosen or remove any ofthe screws from either side of the unit.1. Locate and mark lag bolt locations on both sidesand location for optional bottom mounting bracket,if desired (see Figure 8).NOTE: Top rain flashing is attached to back of unitfor shipping purposes. Be sure to remove thisflashing before installing unit.WALL-MOUNT UNIT MOUNTINGHeavy item hazard.Use more than one person to handle unit.Failure to do so could result in unit damage orserious injury.! WARNING