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User Manual - Page 8

For PUMY-SP112YKMD.

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8
GB
B
A
H
B C
L
r
D
e
a
h
b c d
C
C
B
A
A
A
a
b
c d
C
D
e f
H
h
L
r
C C C
C C
C C
C
4. Installingtherefrigerantpiping
A Outdoor unit
B First branch (CMY)
C Indoor unit
D Cap
A+B+C+D+a+b+c+d+e [ 120 m
L = A+B+C+D+e [ 70 m
ℓ=B+C+D+e[ 50 m
H [ 50 m (Outdoor lower H [ 30 m)
h [ 15 m
A+a+b+c+d+e+f [ 120 m
L = A+f [70m,ℓ=f[ 50 m
H [ 50 m (Outdoor lower H [ 30 m)
h [ 15 m
Fig.4-1
4.1.2. ConnectionwithBranchbox(Fig.4-2)
Flared connections
• Thisunithasaredconnectionsoneachindoorunitandbranchboxandoutdoor
unit sides.
• Removethevalvecoveroftheoutdoorunit,thenconnectthepipe.
• Refrigerantpipesareusedtoconnectthebranchboxandoutdoorunit.
Fig.4-2
B
C
B
C C C
C
C C
C
L
I
h2
b2
b1
c1
a6a5
a4a3a2
h3
h1
H
a1
a7 a8
D
A
A Outdoor unit
B Branch box (PAC-MK∙BC)
C Indoor unit
D First branch (MSDD)
Permissible
length
(one-way)
Total piping length
c1 + b1 + b2 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 [ 120 m
Farthest piping length (L)
c1 + b2 + a8 [ 80 m
Piping length between outdoor unit and branch boxes
c1 + b1 + b2 [ 55 m
Farthestbranchboxfromtherstjoint(b2)
b2 [ 50 m
Farthest piping length after branch box (l)
a8 [ 25 m
Total piping length between branch boxes and indoor units
a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 [ 95 m
Permissible
height
difference
(one-way)
Inindoor/outdoorsection(H)*1
H [ 50 m (In case of outdoor unit is set higher than indoor unit)
H [ 30 m (In case of outdoor unit is set lower than indoor unit)
Inbranchbox/indoorunitsection(h1)
h1 + h2 [ 15 m
In each branch unit (h2)
h2 [ 15 m
In each indoor unit (h3)
h3 [ 12 m
Numberofbends
| c1 + b1 + a1 |, | c1 + b1 + a2 |, | c1 + b1 + a3 |, | c1 + b1 + a4 |, | c1 + b1 + a5 |, | c1 +
b2 + a6 |, | c1 + b2 + a7 |, | c1 + b2 + a8 | [ 15
*1 Branch box should be placed within the level between the outdoor unit and indoor units.
A (mm)
A
Liquid pipe
B
Gas pipe
ø9.52 ø15.88
L: The farthest piping length from the outdoor unit to an indoor unit.
B, C, D (mm)
A
Liquid pipe
B
Gas pipe
ø9.52 ø15.88
L: The farthest piping length from the outdoor unit to an indoor unit.
a, b, c, d, e, f (mm)
D
Model number
A
Liquid pipe
B
Gas pipe
15, 20, 25, 32, 40, 50
a, b, c, d, e, f
[
30 m
ø6.35
ø12.7
a,b,c,d,e,f˃30m ø9.52*1
63, 71, 80, 100, 125, 140 ø9.52 ø15.88
*1Ifthepipinglengthaftertherstjointexceeds30m,useapipesizeofø9.52for
the pipes of the system that exceeds 30 m.
E
Branch kit model
CMY-Y62-G-E
F
4-Branching header
G
8-Branching header
CMY-Y64-G-E CMY-Y68-G-E
* WhenconnectingtheCONNECTIONKIT(PAC-LV11M-J)andanM-seriesindoor
unit,refertotheinstallationmanualfortheCONNECTIONKITwhenselectingthe
pipe size and piping length.
4.1.1. ConnectionwithoutBranchbox(Fig.4-1)
RG79Y960H01.indb 8 2018/02/09 14:31:05
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