Appendex - Toshiba SMMS-u MMY-MUP0801HT8 Quick Reference

Allowable length of refrigerant pipes and allowable height
difference between units
Height
difference Header
unit
between
outdoor
units
H3
≤ 5 m
Outdoor
(a)
Height
difference
between
outdoor
and indoor
Equivalent length corresponded to farthest piping
Main
units: between outdoor unit
H1
piping
≤ (70 m)
L1
1st branching
section
L3
System restriction
O u d t o r o u n t i c o m b n i t a o i n
T o a t c l a p a c y t i f o o u d t o r o u
n I d o r o u n t i c o n n e t c o i n
Total capacity of indoor units
(varies depending on the height difference between
indoor units.)

Appendex- 1

A B C
Follower Follower Follower
(b) (c)
(d)
LO
< 40 m
Y-shape branching
joint for gas pipe
Branching piping
Connecting piping of indoor unit
a
Equivalent length corresponded to farthest piping
Equivalent length corresponded to farthest piping after 1st branching
L4
Y-joint
f
n s t i
E
Follower
unit
(e)
D
Y-shape branching
joint for liquid pipe
Branching
header
L2
L7
b c
Indoor unit
L5 L6
g h
Indoor unit
Single
H2 ≤ 15 m
Combination
H2 > 15 m
1
Figure 1
C r o e r t c
Header unit Follower unit
A B
Main pipe
To the indoor unit
Figure 2
n I c r o e r t c
Header unit Follower unit
A B
Incorrect
Main pipe
To the indoor unit
Y-joint
d e
L
≤ 250 m
Li
≤ 90 m
i j
(j)
U p o t 5 u n s t i
U p o t 1 2 0 H P
U p o t 1 2 8 u n s t i
200% of outdoor units' capacity
150% of outdoor units' capacity
105% of outdoor units' capacity
Follower unit
C
Follower unit
C
Height
difference
between
indoor
units:
H2
≤ 40 m