Premisys MP Series - Split DX Refrigerant Piping Lengths; Piping Length Calculations

14
Packaged and Split Rooftop Ventilator
Piping Length
Item
Piping
in the
figure
Max.
length
(m[ft])
Max. equiv.
length
(m[ft])
Max. piping length A 15 [50] *1 15 [50] *1
Height between
OU and DOAS (OU
above DOAS)
H
15 [50] -
Height between
OU and DOAS (OU
under DOAS)
H
1
15 [50] -
OU: Outdoor Unit, DOAS: Dedicated Outdoor Air Unit
*1 For distances beyond 50 ft, contact your Mitsubishi distributor
Bend Equivalent Length “M”
Outdoor Unit M (m/bends [ft./bends])
PUHY-P96T/YKMU 0.42 [1.38]
PUHY-P144T/YKMU 0.50 [1.64]
Piping “A” Size Selection Rule
Outdoor Unit Pipe (Liquid)
(mm [in.])
Pipe (Gas)
(mm [in.])
PUHY-P96T/
YKMU
12.7 [
1
⁄2] 22.2 [
7
⁄8]
PUHY-P144T/
YKMU
12.7 [
1
⁄2]
28.58 [1
1
⁄8]
PUHY-P96/144TKMU/YKMU Piping
PUHY-P192/240TSKMU/YSKMU Piping
OU
DOAS
A
H (OU above DOAS)
H' (OU under DOAS)
OU
DOAS
H (OU above DOAS)
H' (OU under DOAS)
A
S
T
Outdoor Twinning
Kit CMY-Y100CBK3
h2
OU
Piping Length
Item
Piping
in the
figure
Max.
length
(m[ft])
Max. equiv.
length
(m[ft])
Max. piping length A+S+T 15 [50] *1 15 [50] *1
Height between OU
and OU
h2
0.1 [0.3] -
Height between
OU and DOAS (OU
above DOAS)
H
15 [50] -
Height between
OU and DOAS (OU
under DOAS)
H
1
15 [50] -
OU: Outdoor Unit, DOAS: Dedicated Outdoor Air Unit
*1 For distances beyond 50 ft, contact your Mitsubishi distributor
Bend Equivalent Length “M”
Outdoor Unit M (m/bends [ft./bends])
PUHY-P192T/YSKMU 0.50 [1.64]
PUHY-P240T/YSKMU 0.50 [1.64]
Piping “A” Size Selection Rule
Outdoor Unit Pipe (Liquid)
(mm [in.])
Pipe (Gas)
(mm [in.])
PUHY-P192T/
YSKMU
15.88 [
5
⁄8] 28.58 [1
1
⁄8]
PUHY-P240T/
YSKMU
15.88 [
5
⁄8]
28.58 [1
1
⁄8]
For piping size “S”, “T”, please refer to specification of the twinning
kit CMY-Y100CBK2 on the Outdoor units external drawing.
© 2017 Mitsubishi Electric US, Inc.
PremiSys