Installing The Refrigerant Piping; Tip-Over Prevention Bracket - Mitsubishi Electric Mr. Slim PSA-M KA Series Installation Manual

3. Installing the indoor unit
A
5-38
53-91
B
5-38
53-91
Fig. 3-3
Fig. 3-4
4. Installing the refrigerant piping
4.1. Precautions
4.1.1. For devices that use R32/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 (written on outdoor unit) 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.
Liquid pipe ø9.52 thickness 0.8 mm
Gas pipe ø15.88 thickness 1.0 mm
• Do not use pipes thinner than those specified above.
(mm)
5-20
5-20
1 mm
3.3. Mounting the tip-over prevention bracket (Fig. 3-3)
• Select one of the following mounting methods, depending on the height of the frieze
inside the wall above the floor.
• In the case of a light steel bed, a frieze is generally not used, so the bracket should
be mounted to one of the supports or pillars (obtain the screws locally).
• If the air outlet duct is to be attached to the unit ceiling panel, make sure that the
long edge of the bracket is placed against the wall. This will ensure that the bracket
does not cover the knockout holes in the unit ceiling panel or the screw holes for
attaching the air outlet duct.
A The bracket faces up
B The bracket faces down
I) The short edge of the bracket is against the wall
II) The long edge of the bracket is against the wall
• The distance between the unit and the wall can be varied.
• The vertical dimension shown is the distance from the floor to the bracket mounting
screws (the frieze center is within these limits).
• First, mount the bracket on the wall and then tighten the screw so that the bracket
can slide up and down. (Fig. 3-4)

1 Tip-over prevention bracket

2 Tapping screw
a Frieze
b Wall surface material
c Gap of about 1 mm
Floor mounting
Remove the air intake grill, open the floor mounting knockout holes in the base and
fix the anchor bolts to the floor.
en
5