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2. Unit Installation
Units should be installed only by personnel certified by Mitsubishi Electric.
• Securely fix the unit with bolts to keep the unit from falling down during earthquakes or due to strong winds.
• Install the unit on a foundation made of concrete or iron.
• Noise and vibrations from the unit may be transmitted through the floor and walls. Provide adequate protection
against noise and vibration.
• Build the foundation in such way that the corners of the installation legs are securely supported as shown in the
figure below. When using rubber vibration isolators, make sure they are large enough to cover the entire width of
the unit's legs. If the corners of the legs are not firmly seated, the legs may bend.
• The projecting length of the anchor bolt should be less than 30 mm.
• This unit is not designed to be installed using hole-in anchor bolts unless brackets are used to support the four
corners of the unit.
• The legs on the unit are detachable.
• Detaching the legs
Loosen the three screws on the legs to detach each leg (two each in the front and back). If the finish coat becomes
damaged when detaching the legs, be sure to touch it up.
• With some types of installation, unit vibration and sound will be transmitted to the floors and walls.
Excessive vibrations can damage the pipes, resulting in refrigerant gas leakage. Take measures to prevent
vibration (such as using anti-vibration rubber pads).
Warning:
• Install the unit in accordance with the instructions to minimize the risk of damage from earthquakes and
strong winds.
- Improper installation will cause the unit to topple, resulting in serious injury.
To reduce the vibration of the unit operation, irrespective of the cause of the vibration such as earthquakes and
strong winds, perform the foundation work in accordance with the installation instructions (including the
instructions for installing anti-vibration rubber pads) provided in this section.
• The unit must be securely installed on a structure that can sustain its weight.
- Failure to do so will cause the unit to fall, resulting in serious injury. Abnormal vibrations that result from improper
installation can generate abnormal sound and damage the pipes, resulting in refrigerant gas leakage.
Take adequate measures against typhoon winds and earthquakes so that the unit will not fall or tip over. Consult
the local specialists for safety measures to be taken.
When building the foundation, take the floor strength, water drainage during operation, and piping and wiring routes
into consideration.
Precautions for routing the pipes and wires underneath the unit without detachable legs
When routing the pipes and wires underneath the unit, make sure that the foundation will not block the piping access
holes. Also, make sure the foundation is at least 100 mm high so that the piping can pass under the unit.
A
C
A
A: M10 anchor bolt (field supply)
B
B: Corner is not seated.
C: Detachable leg
D: Screws
B
D
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