Toshiba MCY-MAP0501HT Installationshandbuch Seite 18

3
REFRIGERANT PIPING
Allowable length/height difference of refrigerant piping for quiet places (with PMV Kit)
Main pipe
L1
1st branching
section
Height difference
between indoor
Branching pipe
and outdoor units
H1
L3
Total extension of pipe (Liquid pipe, real length)
Furthest piping length L (∗1)
Piping
Max. equivalent length of main pipe
Length
Equivalent length of furthest piping from
st
1 branching Li (∗1)
Max. real length of indoor unit connecting pipe
Real length between PMV KIT and indoor unit
Height between indoor
Height
and outdoor units H1
Difference
Height between indoor unit and PMV kit H2
∗1 : Furthest indoor unit from 1
Note)
Do not connect two or more indoor units to one PMV Kit. Arrange one indoor unit and one PMV Kit set to 1 by 1.
NO GOOD
PMV Kit
Outdoor unit
Branching pipe L2
h
Equivalent length corresponded to farthest piping L
Equivalent length corresponded to farthest piping after 1st branching Li
L4
e
Y-shape
branch joint
l
Real length
Equivalent length
Upper outdoor unit
Lower outdoor unit
st
branch to be named "A".
Indoor unit
Branch header
a b c d
i j
Indoor unit
g
f
m
Allowable
value
150 m
+ a + b + c + d + e + f + g + h + I + j + k+ l + m + n
65 m
80 m
50 m
15 m
15 m a + h, b + i, c + j, d + k, e + l, f + m. g + n
2 m or more
Below 10 m
30 m
20 m
15 m
OK
Indoor unit
15
PMV Kit
Height difference
k
between indoor unit
and PMV Kit
H2 ∗
* Between highest unit
and lower units.
Example)
n
∗1
A
Piping section
L1 + L2 + L3 + L4
L1 + L3 + L4 + g + n
L1
L3 + L4 + g + n
h, i, j, k, l, m, n
———
———
———
PMV Kit
H2
H2
H2