Mitsubishi Electric PUMY-P112VKM [6/39] Installation location

2.5.3. Windy location installation

When installing the outdoor unit on a rooftop or other location unprotected from the

wind, situate the air outlet of the unit so that it is not directly exposed to strong winds.

Strong wind entering the air outlet may impede the normal airﬂow and a malfunction

may result.

The following shows two examples of precautions against strong winds.

1 Install an optional air guide if the unit is installed in a location where strong winds

from a typhoon, etc. may directly enter the air outlet. (Fig. 2-16)

A Air guide

2 Position the unit so that the air outlet blows perpendicularly to the seasonal wind

direction, if possible. (Fig. 2-17)

B Wind direction

Fig. 2-16 Fig. 2-17

2. Installation location

3. Installing the outdoor unit

(mm)

• Be sure to install the unit in a sturdy, level surface to prevent rattling noises during

operation. (Fig. 3-1)

Foundation bolt M10 (3/8″)

Thickness of concrete 120 mm

Length of bolt 70 mm

Weight-bearing capacity 320 kg

• Make sure that the length of the foundation bolt is within 30 mm of the bottom

surface of the base.

• Secure the base of the unit ﬁrmly with four-M10 foundation bolts in sturdy loca-

tions.

Installing the outdoor unit

• Do not block the vent. If the vent is blocked, operation will be hindered and break-

down may result.

• In addition to the unit base, use the installation holes on the back of the unit to

attach wires, etc., if necessary to install the unit. Use self-tapping screws (ø5 × 15

mm or less) and install on site.

Warning:

• The unit must be securely installed on a structure that can sustain its weight.

If the unit is mounted on an unstable structure, it may fall down and cause

damage or injuries.

• The unit must be installed according to the instructions in order to minimize

the risk of damage from earthquakes, typhoons, or strong winds. An incor-

rectly installed unit may fall down and cause damage or injuries.

Fig. 3-1

A M10 (3/8") bolt

B Base

C As long as possible.

D Vent

E Set deep in the ground.

4. Installing the refrigerant piping

4.1. Precautions for devices that use R410A refrigerant

• Refer to page 3 for precautions not included below on using air conditioners

with R410A refrigerant.

• Use ester oil, ether oil, alkylbenzene oil (small amount) as the refrigeration

oil applied to the ﬂared sections.

• Use C1220 copper phosphorus, for copper and copper alloy seamless pipes,

to connect the refrigerant pipes. Use refrigerant pipes with the thicknesses

speciﬁed in the table to the below. Make sure the insides of the pipes are clean

and do not contain any harmful contaminants such as sulfuric compounds,

oxidants, debris, or dust.

Warning:

When installing or relocating, or servicing the air conditioner, use only the

speciﬁed refrigerant (R410A) to charge the refrigerant lines. Do not mix it with

any other refrigerant and do not allow air to remain in the lines.

If air is mixed with the refrigerant, then it can be the cause of abnormal high pres-

sure in the refrigerant line, and may result in an explosion and other hazards.

The use of any refrigerant other than that speciﬁed for the system will cause

mechanical failure or system malfunction or unit breakdown. In the worst case,

this could lead to a serious impediment to securing product safety.

ø6.35, ø9.52, ø12.7 Thickness 0.8 mm

ø15.88 Thickness 1.0 mm

• Do not use pipes thinner than those speciﬁed above.

• The thicknesses listed in the table above are based on Japanese

standards. Use pipes with a maximum working pressure of 4.15 MPa [601

PSIG] or higher according to local standards.

Max.30

600 600Min.475

Min.25

1050

225 225

370

330

Mitsubishi Electric PUMY-P112VKM [6/39] Installation location

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