Mitsubishi Electric PCA-RP71HAQ / PUHZ-ZRP71VHA [4/24] Installingtheindoorunit

(mm)

A Suspending bracket

B Unit

C Double nuts (purchased locally)

D Nut (purchased locally)

E Washer 1 (with insulation)

F Washer 1 (without insulation)

Fig. 3-6

Fig. 3-5

A Ceiling surface

B Suspending bolt

C Suspending bracket

D Nut (purchased locally)

E Washer 1 (with insulation)

F Washer 1 (without insulation)

3. Installing the indoor unit

4. Installing the refrigerant piping

4.1. Precautions

4.1.1. For devices that use R407C refrigerant

• Do not use the existing refrigerant piping.

• Do not use crushed, misshapen, or discolored tubing. The inside of the tubing

should be clean and free from harmful sulfuric compounds, oxidants, dirt,

debris, oils and moisture.

• Store the piping to be used during installation indoors and keep both ends

of the piping sealed until just before brazing.

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

to coat ares and ange connections.

• Use liquid refrigerant to ll the system.

• Do not use a refrigerant other than R407C.

• Use a vacuum pump with a reverse ow check valve.

• Do not use the tools that are used with conventional refrigerants.

• Do not use a charging cylinder.

• Be especially careful when managing the tools.

• Do not use commercially available dryers.

4.1.2. For devices that use R410A refrigerant

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

oil applied to the ared sections.

•

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

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

specied 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

specied 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 specied 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.

RP35, 50 RP60-140

Liquid pipe ø6.35 thickness 0.8 mm ø9.52 thickness 0.8 mm

Gas pipe ø12.7 thickness 0.8 mm ø15.88 thickness 1.0 mm

• Do not use pipes thinner than those specied above.

3.3. Installing the indoor unit (Fig. 3-6)

Use a proper suspending method depending on the presence or absence of ceiling

materials as side.

In the absence of ceiling materials

1) Directly suspending the unit

Installing procedures

1. Install the washer 1

(with insulation) and the nut (to be locally procured).

2. Install the washer 1

(without insulation) and the nut (to be locally procured).

3. Set (hook) the unit through the suspending bolts.

4. Tighten the nuts.

Check the unit installing condition.

• Check that the unit is horizontal between the right and left sides.

• Check that the unit slopes continuously downward from the front to the rear.

• Check that the unit is not contacting the ceiling.

4) Indoor unit preparation (Fig. 3-5)

1. Install the suspending bolts. (Procure the W3/8 or M10 bolts locally.)

Predetermine the length from the ceiling (1

within 70-90 mm).

2. Remove the intake grille.

Slide the intake grille holding knobs (at two locations) backward to open the intake

grille.

Remove the side panel.

Remove the side panel holding screws (one in each side, right and left) then slide

the side panel forward for removal.

RG79D721H02_en.indd 4 2012/10/09 (火) 午後 3:13:37

Mitsubishi Electric PCA-RP71HAQ / PUHZ-ZRP71VHA [4/24] Installingtheindoorunit

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