Hitachi 4FSVN1Q Installation & Maintenance Manual page 16

Table 5.4 Refrigerant Pipe System&Additional Refrigerant Quantity
Item
Example of system
Base on the connection of the one outdoor
unit and six indoor units as example.
The pipes should be provided at site.
Max. Length of econcmic pipe Lt
Total Length of pipe
Max.Pipe Length
Max.height
Situation that position of outdoor
unit is higher than that of
difference
indoor unit
between Outdoor
Situation that position of indoor
and Indoor Unit
unit is higher than that of
outdoor unit
Max.height difference between all indoor
units or the indoor unit and multi-Kit
From "a" Branch Pipe to
Max.Pipe Length
Indoor of Max. Distance
between Branch
From every Branch Pipe
Pipe and Indoor
to Indoor of connecting
Choose Branch
RAS-4 6FSVN1Q
Pipe RAS-5 6FSYN1Q
Total refrigerant charge
of
this system is calculted
in the following formula.
thereinto
Total Liquid Total Liquid
Length
Total Liquid Total Liquid
Length
System
Outdoor Unit
~
~
<Example>
Liquid
Pipe
Total
Line Branch System
Oil Trap is recommended
at every 30meters lift
with
RAS-5FSVN1Q
Symbol
Mark
Size