MITSUBISHI ELECTRIC MLP-448WU Ladder Room Air Conditioner Optional Grille Installation Guide

MITSUBISHI Room Air Conditioner Optional Grille
INSTALLATION MANUAL
Model MLP-448WU

Correct installation is essential for good performance of the product and safety. Be sure to read this manual before installation.
THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY

• Be sure to read “THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY” before installation.
• Be sure to observe the warnings and cautions specified here as they include important items related to safety.
• After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference.

WARNING (Could lead to death, serious injury, etc.)

• Do not perform installation by yourself (user). Incomplete installation could cause fire or electric shock, injury due to the unit falling, or leakage of water. Consult the dealer from whom you purchased the unit or a qualified installer.
• Perform the installation securely referring to the installation manual. Incomplete installation could cause fire or electric shock, injury due to the unit falling, or leakage of water.
• Install the unit securely in a place which can bear the weight of the unit. If the installation location cannot bear the weight of the unit, the unit could fall causing injury.
• Be sure to use the parts provided or specified parts for the installa-tion work. The use of defective parts could cause fire or electric shock, injury due to the unit falling, or leakage of water.
• Use appropriate protective equipment and tools for safety. Failure to do so could cause injury.

Components

• This kit contains the following parts.

| (1) Grille| (2) Screw| (3) Screw
---|---|---|---
| | |
Q’ty| 1| 6| 1
Remark| | M5x6| 4x 12

Checks before installation

• Before installing the grille (1), make sure the indoor unit is square with the ceiling opening (or parallel to the wall-ceiling joint).
• Check that the 4 points for securing the grille (1) on the indoor unit are level with the ceiling surface.
  Use the installation template supplied with the indoor unit to arrange the position of the indoor unit so that the 4 points for securing the grille (1) are level with the ceiling surface with a tolerance of 3 mm (1/8 inch). (Fig.

1. Note: Instructions for using the installation template are provided on the installation template itself.
   Note: If the misalignment between the 4 points for securing the grille (1) and the ceiling surface is more than 3 mm (1/8 inch), the intake grille may not open or close properly.

• Make sure the following is completed: insulation for the refrigerant pipes, drainage pipes, etc. and wiring connections and arrangements.
• Check that any material like ceiling insulation does not protrude to the ceiling opening.

Grille installation

1. Open the intake grille by pressing the 2 tabs on the intake grille to the direction indicated by arrows. (Fig. 2) Slide the 2 shafts inward and remove the intake grille from the shafts. (Fig. 3) Remove the safety strings from the grille and remove the intake grille. (Fig. 3)

2. Remove the side cover fixing screws on the both sides. Open the side covers L/R and remove the safety strings from the grille, then remove the side covers. (Fig. 3)

3.  Remove the screw cover at the center of the grille. (Fig. 3)

4. Open the horizontal vanes on the indoor unit completely. (Fig. 4)

5. Attach the temporary holding tabs on the grille to the hooks on the indoor unit. (Fig. 5)

6. Adjust the grille so that it is placed parallel to the ceiling joint.
   Loosely install the 4 fixing screws (2) near the corners. (Fig. 5)

7. Tighten the fixing screws (2) and the fixing screw (3) at the middle of the grille. (Fig. 5)

8. Tighten the 4 fixing screws (2) near the corners installed in step 6.
   • Make sure that there are no gaps between the indoor unit and the grille, or between the grille and the ceiling surface.
   Otherwise, air may escape from the gap, resulting in water dripping from the indoor unit. (Fig. 6)
   Note: Make sure that the fixing screws (2) and (3) are tightened completely.
   • If there are gaps between the grille and the ceiling.
   Clear the gap by adjusting the installation height of the indoor unit with the grille installed. (Fig. 7)

9.  Install the screw cover.

10. Hook the safety strings of the side covers L/R to the grille and install the side covers. (Fig. 8)

• Make sure that the catches of the side covers L/R are engaged securely. (Fig. 8)
• Make sure that the safety strings do not hang out of the side covers L/R.\ 11. Fix the side covers L/R with the side cover fixing screws removed in step 2. (Fig. 9) 12. Attach the Air cleaning filters (option) to the hooks for them on the grille. (Fig. 10) 13. Attach the safety strings of the intake grille to the grille and insert the shafts into the holes of the intake grille.

Checks after installation

• Make sure that there are no gaps between the indoor unit and the grille (1), or between the grille (1) and the ceiling surface. Otherwise, air may escape from the gap and it may cause water to drip from indoor unit.
•  Make sure that the air filters are installed in place.

HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
DT79B450H01

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