Possible Types Of Assemblies - Carrier 50NC Series Installation, Operation And Maintenance Instructions

3 - POSSIBLE TYPES OF ASSEMBLIES

Available confi gurations
Depending on the airfl ow direction:
Indoor circuit supply - Outdoor circuit supply
Package version (C)
00
R I
i i
I
e
R
e
Split version (P)
00
R I
i i
I
e
R
e
01
R I
i i
I
e
R
e
I : Indoor circuit supply
i
R : Indoor circuit return
i
10
I
i
R
i
I
e
R
e
10
I
i
R
i
I
e
R
e
11
I
i
R
i
I
e
R
e
I : Outdoor circuit supply
e
R : Outdoor circuit return
e
Mixing box (CS assembly)
Mixing box with for air renewal and free-cooling managed
by the electronic control of the unit. The box incorporates
two interlocked dampers with a servomotor. Assembly and
connection on site, at the return of the indoor module.
Available in Package and Split versions:
Important: In the Package version, both the connection of the
mixing box and the construction of a structural support are the
responsibility of the installer.
The following image shows the positions of the return air (R)
and fresh air (N) dampers:
External mixing box
Note: The recommendation is to select CS assembly instead
C0 for fresh air and free-cooling management. But if for any
reason the mixing box supplied with CS assembly does not fi t
the need of the installation, this option for external mixing box
can be selected.
External mixing box with 2 dampers. Management of the
dampers of an external mixing box not supplied (to manage
fresh air and free-cooling).
This option is only available with C0 assembly. In this case,
it is possible to choose the "Group U" sensors: free-cooling
/ outdoor humidity (refer to the technical catalogue for this
series).
External mixing box with 3 dampers. Management of the
signal control for dampers and fans of an external mixing box
not supplied (to manage fresh air and free-cooling).
In this case, in addition to the sensors of the previous option,
the electrical cabinet incorporates two terminals with 230Vac
output for activation of the contactor that the customer
must install to power its return fan. This output is activated
simultaneously with the 50NC unit supply fan.
N
R
5