Twin Systems - ActronAir Cascade URC-071AS Installation Manual

12. Twin System
Introduction
Twin systems enable living and work spaces to be conditioned with 2 of the same ActronAir indoor cassette units connected to a
common outdoor unit. When installed, it is vital to assign one unit as a "Main" and the other "Slave". This will differentiate which
unit will receive input from the controller and, the other, to mimic the Main unit - further explained in "SW5 Indoor Board Dip
Switch Settings" section. The table below portrays the different ActronAir Cassette configurations available.
Twin Head Configurations
Pipe Length Design / Installation Limits
H1
For proper installation for a Twin System, there are a few design limitations that must be considered. These design limitations are
described in the table below.
Max total length (L+L1+L2)
Max branch length (L1 , L2)
Max difference in branch length (L1-L2)
Max height drop between indoor & outdoor units (H1)
Max height drop between indoor units (H2)
Outdoor Unit Cascade 1
URC-140AS CRE-071AS
L
Design Limits
Page 32
Super Slim Four-Way Cassette
Cascade 2
CRE-071AS
L1
CRE-071AS
50m
15m
10m
20m
0.5m
H2
L2