Installing The Outdoor Unit; Installing The Refrigerant Piping - Mitsubishi Electric CITY MULTI PUMY-P NHMU Série Manuel D'installation

2. Installation location
A
Fig. 2-15

3. Installing the outdoor unit

B
A M10 (3/8") bolt
B Base
C As long as possible.
D Vent
23-5/8 Min. 14-6/32
Min. 13/32
Fig. 3-1

4. Installing the refrigerant piping

Fig. 2-16
A
C
D
23-5/8
6-7/8 6-7/8
37-13/32
2.4.3. 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. 2-15)
A Air guide
2 Position the unit so that the air outlet blows perpendicularly to the seasonal wind
B
direction, if possible. (Fig. 2-16)
B Wind direction
• Be sure to install the unit in a sturdy, level surface to prevent rattling noises during
operation. (Fig. 3-1)
(inch)
<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 inch] 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 [ø13/16 × 19/32 inch] 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.
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.
Indoor unit type
ø6.35 mm [1/4 inch]
Liquid pipe
thickness 0.8 mm [1/32 inch]
ø12.7 mm [1/2 inch]
Gas pipe
thickness 0.8 mm [1/32 inch]
• Do not use pipes thinner than those specified above.
M10 (3/8")
120 mm [4-23/32 inch]
70 mm [2-3/4 inch]
320 kg [705 lbs]
P06-P18 P24-P54
ø9.52 mm [3/8 inch]
thickness 0.8 mm [1/32 inch]
ø15.88 mm [5/8 inch]
thickness 1.0 mm [5/128 inch]
5