Armstrong World Industries 183, 243, 302, 242, 122, 123, 203, 182 manual

INSTALLATION Magic-Pak: HW/HWC

6-4

If three or more adjacent walls form an air shaft with Magic-Pak HW/HWC units facing each other in each wall, the separation between opposite walls should be increased by 20%.

These “rule-of-thumb” dimensions are intended to minimize possibilities for recirculation of condenser air, or interaction between units. However, these numbers are not exact for every application, and other consider- ations might suggest that the designer consult the factory about desired alternatives.

The grille side of the unit may be flush with, or extend beyond, the face of the exterior wall, but should not be recessed more than 2" from the face of the building and should not be obstructed with trees, landscape materi- als or building structure.

There is no minimum clearance required on locating the unit to an interior corner of a building.

Due to the through-the-wall design, HW/HWC units will always have some portion of the unit cabinet extending into the interior of the building. The amount of cabinet exposed to the interior will depend on the wall thick- ness and the depth the unit is installed into the wall.

Often mechanical rooms and closets are designed into the building structure to accommodate the interior portions and duct connections. These rooms or closets must allow ample clearance for regular service and maintenance.

A 30" wide minimum clearance opening is required in front of the filter access door. This will allow for easy removal of the door and replacement of the filter. Electrical conduit, gas lines, duct work and building structures places within this opening will complicate removal of the filter access door that may result in a lack of proper maintenance and diminished perfor- mance.

The cooling section of an HWC unit is built on a sliding chassis that can only be removed through the filter access door. Any service that must be done to the condenser section, evaporator fan or refrigeration circuit requires removal of the chassis from the unit. Therefore, a 30" horizontal minimum clear opening is required in front of the filter access door to facilitate removal of the entire cooling chassis.

It is recommended that the doorway to any closet or room containing a Magic-Pak HW/HWC unit be a minimum of 36" wide to allow some tolerance for chassis removal and service.

If the unit is installed in a residential garage, it must be located or pro- tected to avoid physical damage by vehicles. This unit must be installed so that no electrical components are exposed to water.

Installing units in a relatively inaccessible location for easy chassis removal should be avoided, if for no other reason than to keep the air filter accessible for easy and timely cleaning by the occupants or maintenance personnel.

SRM-HW/HWC

8/99