Carrier 50UA-UH 135 - Sensor and Ductwork Installation Details; Sensor Connection and Location; Ductwork Installation Best Practices

IMPORTANT: The unit should be correctly levelled to
avoid drainage problems.
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The room temperature sensor and supply temperature sensor
are located in the control box together with their connectors.
Please refer to the wiring diagrams for the required connec-
tions and suitable cable diameter. Criteria for selecting
SENSORLOCATIONSWILLVARYWITHSYSTEMANDBUILDINGSPECIlCS
Recommended sensor locations are shown in Fig. 6.
NOTE: The return duct sensor or the room temperature
sensor can be used.
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ROOM
1. Room temperature sensor
2. Return duct temperature sensor (option)
3. Supply duct temperature sensor
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Determine the ductwork dimensions according to the air
mOWTOBECARRIEDANDTHEAVAILABLESTATICUNITPRESSURE4HE
DIFFERENTAIRmOWSANDSTATICPRESSURESTHATEACHUNITCAN
supply, are shown in the fan performance tables.
It is recommended to observe the following considerations:
s 7HATEVERTYPEOFDUCTWORKISUSEDITSHOULDNOTBE
MADEOFMATERIALSWHICHAREmAMMABLEORWHICHGIVEOFF
TOXICGASESINTHEEVENTOFAlRE4HEINTERNALSURFACES
should be smooth, and not contaminate the air which
passes through. It is recommended to use sheet metal
ducts which are adequately insulated to avoid conden-
sation and thermal leakage.
s !TTHEPOINTSWHERETHEDUCTSJOINTHEUNITITISRECOM
MENDEDTOUSEmEXIBLECONNECTIONSWHICHABSORB
vibrations, prevent noise inside the ductwork and allow
access to the unit.
s "ENDSNEARTHEUNITOUTLETSHOULDBEAVOIDEDASMUCH
as possible. If unavoidable, they should be as slight as
POSSIBLEANDINTERNALDEmECTORSSHOULDBEUSEDWHEN
the duct has large dimensions.
Below are some obligations for ductwork:
All ducts should have radial bends. It is highly
recommended that no sheets of ductwork have right angle
bend.
)FDUCTISDIRECTEDTOWARDSRIGHTLEFTOFSUPPLYAIROUTLETOR
there is any change in duct diameter, the ductwork should
go downward for at least 2m before any bend or diameter
change (see Fig. 7a). If no change in diameter or direction
is involved, it is not obliged.
NOTE: All duct sizing and design work should be carried
OUTBYQUALIlEDTECHNICIANS
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