ENGLISH
Installation Manual
25
Installation
trained in handling live electrical components perform these tasks. Failure to follow all electrical safety
precautions when exposed to live electrical components could result in death or serious injury. Verify that
the power supply available is compatible with the unit's nameplate. Use only copper conductors to connect
the power supply to the unit.
- Use Copper Conductors Only
Unit terminals are not designed to accept other types of conductors. Failure to use copper conductors may
result in equipment damage. Main Unit Power Wiring A field supplied disconnect switch must be installed at
or near the unit in accordance with the National Electric Code (NEC latest edition).
- Return Air (hinged) Acoustical Door
The hinged acoustical door is recessed into the wall so that the door is flush with the surface of the wall.
The opening through the wall for the door assembly must be centered with the return-air opening of the unit
cabinet. For full installing instructions of the return-air acoustical door.
- Drywall Installation
Before installing drywall around cabinet. Cover the cabinet supply and return openings with plastic or
cardboard to help prevent dust or construction debris from reaching unit components. Warranties will be
voided if paint or foreign debris is allowed to contaminate internal unit components. The location of the
drywall may be dependent upon the type of return air access design. Units that contain a field provided
return air access assembly, contractor must calculate location of drywall to allow for frame mounting.
- Units utilizing Hinged Acoustic Door Assembly
1. Locate the side studs a minimum of 1 1/4-inches and a maximum of 1 3/8-inches from the cabinet to the
side of the stud. This critical dimension, combined with "distance between studs" is used to determine the
side-to-side opening for the door, dimension A. The distances provided in the table are a "minimum"
dimension. Allow 3 1/2-inches from the front of the cabinet to the sheet rock surface, Top View.
2. The height of the door assembly must be positioned to recess the door 2 1/4-inches from the cabinet's
return-air opening, Side View blow-up.
3. Locate dimensions A and B for sheet rock opening size. The position of the sheet rock opening must be
centered side-to-side with the return-air opening in the cabinet. Ensure the bottom of the sheet rock
opening is 2 1/4-inches below the return-air opening in the cabinet. This allows the door recess to rest on
the bottom of the sheet rock opening for proper vertical placement of the door.
4. Place the door frame into the sheet rock opening. A positive seal is critical between the back of the door
frame and the front of the cabinet. Ensure that the gasket material seals properly.
When placing the sheet rock panel, make certain the opening for the door is centered with the return-air
opening in the cabinet (±1/8").
NOTE
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