Air Ducts Connections - Carrier 30PA 90 Installation, Operation And Maintenance Instructions

8 - CHECKING BEFORE COMMISSIONING

Air ducts connections

For units designed for installation indoors with ducted supply and
return in the outdoor circuit, it is advisable to have the following
recommendations:
■ Curves in the fan discharge supply must be avoided. It is
recommendable to have a straight section of duct measuring
approximately 1 metre. If it is not possible, they must be as
smooth as possible, using indoor defl ectors when the duct is
of large dimensions.
■ When making the ducts, direction sharp changes must be
avoided since they can generate occasional pressure drops,
which aff ect the available pressure and the fl ow. The location
of discharge and aspiration grilles must be studied carefully to
avoid the air recirculation and the transmission and generation
of noises to the interior.
■ No matter the type of ducts type to use, these must be insulated
and must not be composed of materials that propagate fi re nor
expel toxic gases in the event of a fi re. The internal surfaces
must be smooth and should not pollute the air that circulates
within them. In any case, the eff ective legislation about this
issue must be respected.
■ Flexible connections must be made between the ducts and the
unit that avoid the noise and vibration transmission.
Flexible connections
Optionally, these units can be sent with fl exible connections for
supply and return air.
Supply ducts
STD version
M00 dimensions (mm)
A
90STD / 100STD 859
120STD to 180STD 1139
STD version M00 dimensions (mm)
A
90STD / 100STD
859
120STD to 180STD
1139
M00 dimensions (mm)
HEE version
A
90HEE 859
100HEE / 120HEE 1139
160HEE / 180HEE 1854
 Damper for condensation pressure control (optional): add the

height of the damper to the fl exible duct.
In case of asking together for fl exible connections and damper
for condensation pressure control (optional for version STD),
discharge fl exible ducts are attached to the above mentioned
damper.
If it is removed the damper for installation on duct, it is necessary
to maintain the frame for reconnecting the fl exible connections.
10
Without damper 
M01 dimensions (mm)
B C A B
407 132 552 430
481 132 652 552
With damper 
M01 dimensions (mm)
B C A B
407 132 513 391
481 132 613 513
M01 dimensions (mm)
B C A B
407 132 633 589
481 132 817 639
407 132 1619 590
Return ducts
STD version
90STD / 100STD
120STD to 180STD
HEE version
90HEE
100HEE / 120HEE
160HEE / 180HEE
C
M00 asssembly:
Horizontal supply
152
152
C
132
132
C
132
132
132
M01 asssembly:
Vertical supply
Without fi lters (mm) With fi lters (mm)
C D E C
132 903 800 109
132 1183 950 109
Without fi lters (mm) With fi lters (mm)
C D E C
132 903 800 109
132 1183 950 109
132 1897 800 109
D E
903 800
1183 950
D E
903 800
1183 950
1897 800