Mitsubishi Electric PUHY-RP200YJM-A [16/34] Precautions concerning piping connec tion and valve operation

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Indoor 1: 125 A: ø15.88 40 m a: ø9.52 10 m

2: 100 B: ø12.7 10 m b: ø9.52 5 m

3: 40 C: ø12.7 15 m c: ø6.35 10 m

4: 32 D: ø12.7 10 m d: ø6.35 10 m

5: 63 e: ø9.52 10 m

The total length of each liquid line is as follows:

ø15.88: A = 40 = 40 m

ø12.7: B + C + D = 10 + 15 + 10 = 35 m

ø9.52: a + b + e = 10 + 5 + 10 = 25 m

ø6.35: c + d = 10 + 10 = 20 m

Therefore,

Additional refrigerant charge

= 40 × 0.2 + 35 × 0.12 + 25 × 0.06 + 20 × 0.024 + 3.5 = 17.7 kg

Value of α

Total capacity of connecting indoor units α

Models ~ 80 2.0 kg

Models 81 ~ 160 2.5 kg

Models 161 ~ 330 3.0 kg

Models 331 ~ 390 3.5 kg

Models 391 ~ 480 4.5 kg

Models 481 ~ 630 5.0 kg

Models 631 ~ 710 6.0 kg

Models 711 ~ 800 8.0 kg

Models 801 ~ 890 9.0 kg

Models 891 ~1070 10.0 kg

Models 1071 ~ 12.0 kg

10.2. Precautions concerning piping connec-

tion and valve operation

• Conduct piping connection and valve operation accurately and carefully.

• Removing the pinched connecting pipe

When shipped, a pinched connecting pipe is attached to the on-site liquid and

gas valves to prevent gas leakage.

Take the following steps 1 through 4 to remove the pinched connecting pipe

before connecting refrigerant pipes to the outdoor unit.

1 Check that the refrigerant service valve is fully closed (turned clockwise all

the way).

2 Connect a charging hose to the service port on the liquid/gas refrigerant

service valve, and extract the gas in the pipe section between the refriger-

ant service valve and the pinched connecting pipe (Tightening torque

12 N·m).

3 After vacuuming gas from the pinched connecting pipe, sever the pinched

connecting pipe at the location shown in [Fig.10.2.1] and drain the

refrigerant.

4 After completing 2 and 3 heat the brazed section to remove the pinched

connecting pipe.

[Fig. 10.2.1] (P.6)

<A> Refrigerant service valve (liquid side/brazed type)

<B> Refrigerant service valve (gas side/brazed type)

A Shaft

Fully closed at the factory, when connecting the piping, and when vacuuming.

Open fully after these operations are completed.

• Turn the shaft counterclockwise with a hexagonal wrench.

• Turn around the shaft until it stops.

• Turn the shaft clockwise with a hexagonal wrench.

• Turn around the shaft until it stops.

B Service port

Available for gas venting of the pinched connecting pipe, or vacuuming in the

refrigerant pipes on the site.

(Tightening torque 12 N·m)

C Cap

Remove the cap before operating the shaft. Be sure to return it to the original

position after completing the operation.

D Pinched connecting pipe severing portion

E Pinched connecting pipe brazing portion

Warning:

• The section of the pipe on the unit between the two refrigerant service

valves is filled with gas. Extract the gas in the above-mentioned pipe

section before heating the brazed section to remove the refrigerant service

valve connecting pipe.

- If the brazed section is heated without first extracting the gas, the pipe may

burst or the connecting pipe may blow off causing serious injury.

Caution:

• Place a wet towel on the refrigerant service valve before heating the brazed

section to keep the temperature of the valve from exceeding 120 ˚C.

• Direct the flame away from the wiring and metal sheets inside the unit to

prevent heat damage.

At the

conditions

below:

Caution:

• Do not vent R410A into the atmosphere.

• R410A is a Fluorinated Greenhouse gas, covered by the Kyoto Protocol,

with a Global Warming Potential (GWP) = 1975.

• Refrigerant pipe connection

This product includes connecting pipes for front piping and bottom post-piping.

(Refer to [Fig.10.2.2])

Check the liquid/gas piping dimensions before connecting the refrigerant pipe.

Refer to item 9.2 Refrigerant piping system for piping dimensions.

Make sure that the refrigerant pipe is not touching other refrigerants pipes, unit

panels, or base plates.

Be sure to use non-oxidative brazing when connecting pipes.

[Fig.10.2.2] (P.6)

<A> Front pipe routing <B> Bottom pipe routing

<C> Included with outdoor unit

A Gas pipe (field supply required) B Liquid pipe (field supply required)

C Shape

• Front pipe routing

• Bottom pipe routing

*1 In the case the unit is used in combination with other outdoor units.

*2 In the case of R22.

Satisfy the minimum insertion depth in the table below when expanding on-site

piping.

Pipe diameter (mm) Minimum insertion depth (mm)

5 or more less than 8 6

8 or more less than 12 7

12 or more less than 16 8

16 or more less than 25 10

25 or more less than 35 12

35 or more less than 45 14

• After evacuation and refrigerant charging, ensure that the handle is fully open.

If operating with the valve closed, abnormal pressure will be imparted to the

high- or low-pressure side of the refrigerant circuit, giving damage to the com-

pressor, four-way valve, etc.

• Determine the amount of additional refrigerant charge by using the formula,

and charge refrigerant additionally through the service port after completing

piping connection work.

Liquid side

Gas side

RP200,RP250,RP300

RP200 *1,RP250 *1

RP350

RP350 *1

RP200,RP250,

RP300,RP350 *1

RP200 *1

RP200 *2

RP250 *1,RP300 *1

RP350

Use the included connecting pipe 2 and

8 to connect.

Use the included connecting pipe 8 to con-

nect.

Use the included connecting pipe 3 and

9 to connect.

Use the included connecting pipe 9 to con-

nect.

Use the included elbow 1 and connecting

pipe 6 to connect.

Use the included elbow 1 and connecting

pipe 4 to connect.

Use the included elbow 1 to connect.

Use the included elbow 1 and connecting

pipe 5 to connect.

Use the included elbow 1 and connecting

pipe 7 to connect.

Liquid side

Gas side

RP200,RP250,RP300

RP200 *1,RP250 *1

RP350

RP350 *1

RP200,RP250,

RP300,RP350 *1

RP200 *1

RP200 *2

RP250 *1,RP300 *1

RP350

Use the included connecting pipe 2 to con-

nect.

Expand the liquid side on-site piping (ID

ø9.52)

and connect to the refrigerant service valve

piping.

Use the included connecting pipe 3 to con-

nect.

Expand the liquid side on-site piping (ID

ø12.7)

and connect to the refrigerant service valve

piping.

Use the included connecting pipe 6 to con-

nect.

Use the included connecting pipe 4 to con-

nect.

Expand the gas side on-site piping (ID

ø25.4)

and connect to the refrigerant service valve

piping.

Use the included connecting pipe 5 to con-

nect.

Use the included connecting pipe 7 to con-

nect.

WT05910X01_en_e.p65 10.5.18, 15:4516

Mitsubishi Electric PUHY-RP200YJM-A [16/34] Precautions concerning piping connec tion and valve operation

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