Toshiba MCY-MUG0401HSW-E Installation Manual page 32

◆Allowable length / height difference of refrigerant piping
Outdoor unit
Main pipe
L1
Branching pipe L2
1st branching
section
Height difference
between indoor and
outdoor units H1
Branching pipe
L3
Equivalent length corresponded to Furthest piping after 1st branching Li
Total extension of pipe (liquid pipe, real length)
Real length
Furthest piping
length L (*1)
Equivalent length
Piping Length
Max. equivalent length of main pipe
Max. equivalent length of furthest piping from
1st branching Li (*1)
Max. real length of indoor unit connecting pipe
Upper outdoor unit
Height between indoor
Height
and outdoor units H1
Lower outdoor unit
Difference
Height between indoor units H2
*1: Furthest indoor unit from 1st branch to be named "A".
61-EN
Branching
header
a b c d
Indoor unit
Equivalent length corresponded to Furthest piping L
f
e
Y-shaped
branch joint
A
Allowable
Pipes
value
300 m L1 + L2 + L3 + a + b + c + d + e + f
120 m
L1 + L3 + f
150 m
80 m L1
40 m L3 + f
15 m a, b, c, d, e, f
50 m ―
40 m ―
15 m ―
– 31 –
◆Allowable length / height difference of refrigerant piping for quiet places
(with PMV Kit)
1st branching
section
Height
difference
between
indoor and
Branching pipe
outdoor
units
H1
Height
difference
between
indoor units
H2
*1
Total extension of pipe (Liquid pipe, real length)
Furthest piping length L
(*1)
Piping
Max. real length of main pipe
Length
Max. equivalent length of furthest piping from 1st
branching Li (*1)
Max. equivalent 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 1st branch to be named "A".
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.
Incorrect
PMV Kit
Outdoor unit
Main pipe
L1
Branching
header
Branching pipe L2
a b c d
g h i
Indoor unit
L3
Equivalent length corresponded to Furthest piping L
Equivalent length corresponded to Furthest piping after 1st branching Li
Y-shape e
branch joint
k
Allowable value
250 m
Real length 100 m
Equivalent length 130 m
70 m
30 m
15 m
2 m or more Below 10 m
Upper outdoor unit 50 m
Lower outdoor unit 40 m
15 m
Correct
Indoor unit
PMV Kit
Height difference
between indoor
unit and PMV Kit
j
H2 *
* Between
highest unit and
lower units.
Example)
H2
f
H2
l
*1
A
H2
Pipes
L1 + L2 + L3 +
a + b + c + d + e + f + g+ h + i + j + k + l
L1 + L3 + f + i
L1
L3 + f + i
a + g, b + h, c + i, d + j, e + k, f + l
g, h, i, j, k, l
―
―
―
PMV Kit
Indoor unit
62-EN