Installing The Outdoor Unit; Installing The Refrigerant Piping - Mitsubishi Electric MXZ-SM72TAM-U1 Service Manual

3. Installing the outdoor unit

A
B
A M10 (3/8") bolt
B Base
C As long as possible.
D Vent
E Set deep in the ground
Min.18-23/32(475)
23-5/8(600)
Min.1(25)
Fig. 3-1

4. Installing the refrigerant piping

4.1. Precautions for devices that use R410A refrigerant
• Refer to 1.5. for precautions not included below on using air conditioners with R410A refrigerant.
• U se 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 outdoor unit, 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 pressure 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 mm (1/4 in), ø9.52 mm (3/8 in),
ø12.7 mm (1/2 in)
ø15.88 mm (5/8 in), ø19.05 mm (3/4 in),
ø22.2 mm (7/8 in), ø28.58 mm (1-1/8 in)
• D o 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 ac-
cording to local standards.
Caution:
Follow the instructions below to prevent abrasive components contained in sandpaper and cutting tools from entering the refrigerant circuit because those
components can cause failures of the compressor and valves.
• To deburr pipes, use a reamer or other deburring tools, not sandpaper.
• To cut pipes, use a pipe cutter, not a grinder or other tools that use abrasive materials.
• When cutting or deburring pipes, do not allow cutting chips or other foreign matters to enter the pipes.
• If cutting chips or other foreign matters enter pipes, wipe them off the inside of the pipes.
in (mm)
A A
D
E
C
23-5/8(600)
8-11/16(220)
9-1/16(230)
41-11/32(1050)
Thickness 0.8 mm (0.032 in)
Thickness 1.0 mm (0.039 in)
• Be sure to install the unit in a sturdy, level surface to prevent rattling noises during
operation. (Fig. 3-1)
<Foundation specifications>
Foundation bolt
Thickness of concrete
Length of bolt
Weight-bearing capacity
• Make sure that the length of the foundation bolt is within 30 mm (1-3/16") of the
bottom surface of the base.
• S ecure 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, ø13/16" × 19/32" 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.
Caution:
• Install the unit on a rigid structure to prevent excessive operation sound or
vibration.
M10 (3/8")
120 mm (4-23/32")
70 mm (2-3/4")
320 kg (705 lbs)
en
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