Mitsubishi Electronics PUHY-YMC installation manual Multiple line/header

ENGLISH

Constant

Variable

capacity unit

capacity unit

Distributer (gas) (optional)

Oil balance pipe (optional) I

Constant

Variable

(for distribution within the unit)

Gas line B

capacity unit

capacity unit

Gas line A

Liquid line B

Liquid line A

Distributer (liguid) (optional)

Multiple line/header

Gas line (main) C

Liquid line (main) C

Note 1

:indicates piping connection points

A

G

B

Connection examples

Distributer

(connecting to six indoor units)

(liquid)

To down stream units

Distributer

A

H

(gas)

Branch header

Note:

C

F

•

The model total for downstream units

First branch

L

shown in the table below is the model

(branch joint)

D

R

d

e

f

Cap

total when viewed from Point A in the

drawing above.

E

In door

In door In door

•

With the exception of PUHY-600YMC,

Branch joint In door

In door

In door

unit

unit

unit

a

b

c

h

the first branch is always CMY-Y302-F.

unit

unit

unit

4

5

6

1

2

3

Note 1: Because it is built into the variable capacity unit, B is used to carry liquid only. Set the constant capacity unit and

variable capacity unit in accordance with the G dimension given in the figure above (G = 0.01 m).

Item

Piping components

Tolerance

length

Indoor

Total piping length

A+B+C+D+E+F+a+b+c+d+e+f

220 m or less

Farthest piping length after first branch (r)

D+E+c

40 m or less

side

Farthest piping length

(L)

A (B)+C+D+E+c

100 m or less (Max. equivalent length 125 m)

Permissible

The included oil balance pipe must be used. If any other piping is used, the length

Outdoor

Oil balance pipe

I

of the oil balance pipe must be no more than 3 m (max. equivalent length 4 m),

side

and height from the bottom of the unit must be no more than 0.1 m.

Distributer (liquid)/Variable capacity unit, Constant capacity unit

A, B (Liquid line)

4 m or less (Max. equivalent length 5 m)

Distributer (gas)/Constant capacity unit

A (Gas line)

4 m or less (Max. equivalent length 5 m)

Permissible high/

Indoor/Outdoor

Outdoor upper

H

50 m or less

Outdoor lower

H

40 m or less

Low difference

Indoor/Indoor

h

15 m or less

Variable capacity unit/Constant capacity unit

–

Must be installed on same frame, and there must be no high/low difference.

■ Selecting the refrigerant branch kit

Select the branch kit, sold separately, from the table below. (Each kit contains a refrigerant and gas piping set.)

Use the table to the right to make the selection based

Line branching

Header branching

on the model total of indoor units downstream from the

Total of units downstream

Total of units downstream

Total of units downstream

Total of units downstream

4 branching

7 branching

10 branching

branch section or on the number of indoor units to be

less than 180

181 to 370

371 to 710

more than 711

header

header

header

connected on the header branch.

CMY-Y102S-C

CMY-Y102L-C

CMY-Y202-C

CMY-Y302-C

CMY-Y104

CMY-Y107

CMY-Y1010

■

Select each section of refrigerant piping

(1) Refrigerant piping diameter in section from out-

(2) Refrigerant piping diameter in section from

door unit to first branch (outdoor unit piping diam-

branch to indoor unit (indoor unit piping diam-

(1)

Section from outdoor unit to first

eter)

eter)

branch (C)

Model

Piping diameter (mm)

Model number

Piping diameter (mm)

(2) Sections from branch to indoor

Each section

Liquid line

Gas line

Liquid line

ø 6.35

unit (a, b, c, d, e, f)

of piping

22 ·28 ·36 ·45

PUHY-600YSMC

ø 19.05

ø 38.1

Gas line

ø 12.7

(3) Section from branch to branch

PUHY-650YSMC

ø 19.05

ø 44.45

Liquid line

ø 9.52

(D, E, F)

56 to 90

PUHY-700YSMC

ø 19.05

ø 44.45

Gas line

ø 15.88

Select the size from the table to the right.

PUHY-750YSMC

ø 19.05

ø 44.45

112 ·140 ·160

Liquid line

ø 9.52

(3) Refrigerant piping diameter in section from branch

Gas line

ø 19.05

224

Liquid line

ø 12.7

to branch

Gas line

ø 25.4

Liquid line

ø 12.7

Downstream unit model total

Liquid line (mm)

Gas line (mm)

280

Gas line

ø 28.6

90 or less

ø 9.52

ø 15.88

91 to 180

ø 12.7

ø 19.05

181 to 370

ø 12.7

ø 25.4

371 to 540

ø 15.88

ø 31.75

541 to 710

ø 15.88

ø 38.1

711 or more

ø 19.05

ø 44.45

■

Additional refrigerant charge

<Additional charge>

The outdoor unit is charged with refrigerant at the time of

Liquid pipe size

Liquid pipe size

Liquid pipe size

Liquid pipe size

Liquid pipe size

shipping according to the chart above. As this charge

total length of

total length of

total length of

total length of

total length of

does not include the amount needed for extended piping,

ø 19.05 ⋅ 0.29

+

ø 15.88 ⋅

0.25

+

ø 12.7 ⋅ 0.12

+

ø 9.52 ⋅

0.06

+

ø 6.35 ⋅ 0.024

+ α

additional charging for each refrigerant line will be required

on site. In order that future servicing may be properly

provided, always keep a record of the size and length of

(m) ⋅

0.29 (kg/m)

(m) ⋅ 0.25 (kg/m)

(m) ⋅ 0.12 (kg/m)

(m) ⋅

0.06 (kg/m)

(m) ⋅ 0.024 (kg/m)

each refrigerant line and the amount of additional charge

<Example> Indoor 1 : 125

A : ø 12.7

3 m

a

:ø 9.52

10 m

by writing it in the space provided on the outdoor unit.

■ Calculation of additional refrigerant charge

2 : 125

B : ø 15.88

1 m

b

:ø 9.52

5 m

At the conditions

• Calculate the amount of additional charge based on the length

3 : 125

C : ø 19.05

30 m

c

:ø 9.52

5 m

4 : 125

D : ø 15.88

10 m

d

:ø 9.52

10 m

below:

of the piping extension and the size of the refrigerant line.

5 : 100

E : ø 12.7

5 m

e

:ø 9.52

15 m

• Use the table to the right as guide to calculating the amount

6 : 40

F : ø 12.7

15 m

f

:ø 6.35

5 m

of additional charging and charge the system according.

The total length of each liquid line is as follows

•

If the calculation results in a fraction of less than 0.1

ø 19.05 : C = 30 m

kg, round up to the next 0.1 kg. For example, if the

ø 15.88 : B + D = 1 + 10 = 11 m

Value of

α

result of the calculation was 20.03 kg, round the re-

ø 12.7 : A + E + F = 3 + 5 + 15 = 23 m

sult up to 20.1 kg.

ø 9.52 : a + b + c + d + e = 10 + 5 + 5 + 10 + 15 = 45 m

Total capacity of

α

•

If the total amount of refrigerant including the amount

ø 6.35

: f = 5 m

connecting indoor units

of refrigerant sealed in the outdoor unit when shipped

Therefore,

to Model 80

1.0 kg

from the factor plus additional refrigerant for exten-

<Calculation example>

Models 81 to 160

1.5 kg

Additional

sion piping exceeds 73 kg, use 73 kg as the total

Models 161 to 330

2.0 kg

refrigerant charge = 30 ⋅

0.29 +11 ⋅

0.25 + 23 ⋅ 0.12 +

amount of refrigerant.

Models 331 to 480

2.5 kg

45 ⋅

0.06 + 5 ⋅

0.024 + 3.0 = 20.1 kg

Amount of refrigerant when shipped from factory +

Models 481 or more

3.0 kg

added refrigerant = 73 kg

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