Mitsubishi Electric PUHZ-SW50VHA Service Manual download pdf (Page 4)

2-3. PRECAUTIONS WHEN REUSING EXISTING R22 REFRIGERANT PIPES

(1) Flowchart

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No. Tool name Specifications

1 Gauge manifold · Only for R410A

· Use the existing fitting

specifications

. (UNF1/2)

· Use high-tension side pressure of 5.3MPa·G or over.

2 Charge hose · Only for R410A

· Use pressure performance of 5.09MPa·G or over.

3 Electronic scale

4 Gas leak detector · Use the detector for R134a, R407C or R410A.

5 Adaptor for reverse flow check · Attach on vacuum pump.

6 Refrigerant charge base

7 Refrigerant cylinder · Only for R410A · Top of cylinder (Pink)

· Cylinder with syphon

8 Refrigerant recovery equipment

Although "-BS" model has been designed to be resistant to salt damage, observe the following precautions to maintain the

performance of the unit.

1. Avoid installing the unit in a location where it will be exposed directly to seawater or sea breeze.

2. If the cover panel may become covered with salt, be sure to install the unit in a location where the salt will be washed away by

rainwater. (If a sunshade is installed, rainwater may not clean the panel.)

3. To ensure that water does not collect in the base of the outdoor unit, make sure that the base is level, not at angle. Water

collecting in the base of the outdoor unit could cause rust.

4. If the unit is installed in a coastal area, clean the unit with water regularly to remove any salt build-up.

5. If the unit is damaged during installation or maintenance, be sure to repair it.

6. Be sure to check the condition of the unit regularly.

7. Be sure to install the unit in a location with good drainage.

2-4. PRECAUTIONS FOR SALT PROOF TYPE "-BS" MODEL

Perform the airtight test, vacuum air purging,

additional refrigerant charging (if necessary),

and gas leak check.

• Refer to the ﬂ owchart below to determine if the existing pipes can be used and if it is necessary to use a ﬁ lter dryer.

• If the diameter of the existing pipes is different from the speciﬁ ed diameter, refer to technological data materials to conﬁ rm if

the pipes can be used.

▼

Measure the existing pipe thickness and

check for damage.

The existing pipe thickness meets speciﬁ ca-

tions and the pipes are not damaged.

Check if the existing air conditioner can operate.

After operating the cooling system for about 30

minutes, do a pump down work.

Disconnect the existing air conditioner from the

pipes.

Attach the new air conditioner

Test run

The existing pipes cannot be reused.

Use new pipes.

* If the existing air conditioner cannot operate, use

a refrigerant recovery device to collect the refrigerant.

* Use new pipes for SW40-50 models.

The existing pipe thickness does not meet

speciﬁ cations or the pipes are damaged.

OCH525

1 2 3 4 5 6 7 8 9 ... 59 60

Comments to this Manuals

No comments

Mitsubishi Electric PUHZ-SW50VHA Service Manual Page 4

Comments to this Manuals

Related products and manuals for Split-system air conditioners Mitsubishi Electric PUHZ-SW50VHA