Johnson Controls HVAHP036B21S - Piping Work; Piping Work Conditions

OUTDOOR UNITS
TC-16001-rev.5
2-35
2.14.1 Piping Work Conditions
2.14 Piping Work
Outdoor Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
First Branch
Indoor Unit Side
L3
H2
H1
L1L2
L3L3L3
: Gas Pipe, Liquid Pipe
Terminal
Indoor Unit
Comply with the following limitations when installing the unit.
[ Example ]
Item Mark Allowable Piping Length
Total Piping Length -
< 984 ft (300m)
Maximum Piping Length
Actual Length
L1
< 492 ft (150m)
Equivalent Length
< 623 ft (190m)
Maximum Piping Length between
Multi-kit of 1st Branch and Each Indoor Unit
L2
< 131 ft (40m)
Maximum Piping Length between
Each Multi-kit and Each Indoor Unit
L3
< 131 ft (40m)
Height Difference between
Outdoor Unit and Indoor Units
Outdoor Unit is Higher
H1
< 164 ft (50m)
Outdoor Unit is Lower
< 131 ft (40m)
Height Difference between Indoor Units H2
< 49 ft (15m)
Number of Main Branch
Including Header Branch - 1 or less
Not Including Header Branch - 2 or less
Item Mark Details
Total Piping Length a+b+c The total amount of all piping actual length.
Maximum Piping
Length
a+c
The actual piping length between the stop
valve of the outdoor unit and the terminal
indoor unit.
Piping Length -
The actual length of pipe takes no account
for equivalent lengths for pressure drops of
elbows.
Equivalent Piping
Length
-
The combination of the straight pipe length
plus the equivalent length of elbows and other
pressure drop calculations.
a
b
c
AB
Indoor
Unit
Indoor
Unit
First Branch
Multi-Kit
Outdoor Unit
[ Example ]