Carrier 48UA-UH 135, Инструкции по установке, эксплуатации и обслуживанию

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When the outdoor conditions are maintained based on
TEMPERATUREORENTHALPYDEPENDINGONTHEOPTIONlTTED
free cooling can be provided using fresh air. The economizer
ISFACTORYlTTEDANDTESTEDBEFORELEAVINGTHEFACTORYSEE
Fig. 15).
The return air damper is operated by a 24 V actuator, and
the fresh air damper is mechanically linked to this damper
to open or close at opposite angles. During start-up, the
return air damper is fully open, while the fresh air damper
is fully closed.
4HEOPTIONALSOINCLUDESAFACTORYlTTEDFRESHAIRHOODTHAT
is folded during transportation to limit risks of damage
ANDMUSTBEUNFOLDEDONSITE0LEASEREFERTOTHECERTIlED
drawings and wiring diagrams for the mechanical and
electrical connections of the economizer and to the Touch
Pilot Control IOM for further information.
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Economizer
Dampers
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Damper with direct link driven blades, can be preset to
admit up to 40% outside air into the return-air compart-
ment. To adjust, loosen the securing screw and rotate the arm
of the damper blades to the desired setting. Then retighten
the screw to secure the damper blades (see Fig.16). It also
INCLUDESAFACTORYlTTEDFRESHAIRHOOD
Manual outside air
damper
Adjusting arm
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