Carrier 50TCQD14 Installation Instructions Manual

Also see for 50TCQD: Installation instructions

Contents

37Table 15 – Enthalpy Operation No DCV (CO 2 Sensor) -- 1 Speed FanDemandControlledVentilation(DCV)Outside Air ---Good toeconomize?Y1 I Y2-I Fan Speed Y1-O Y2-O Occupied UnoccupiedNone NoOff Off High 0-v/Off 0-v/Off MIN POS ClosedOn Off High 24-v/On 0-v/Off MIN POS ClosedOn On High 24-v/On 24-v/On MIN POS ClosedNone YesOff Off High 0-v/Off 0-v/Off MIN POS ClosedOn Off High 0-v/Off 0-v/Off MIN POS to Full-Open Closed to Full-OpenOn On High 24-v/On 0-v/Off* MIN POS to Full-Open Closed to Full-Open* With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---Ihave not been satisfied.Table 16 – Enthalpy Operation No DCV (CO 2 Sensor) -- 1 Speed FanDemandControlledVentilation(DCV)Outside Air ---Good toeconomize?Y1 I Y2-I Fan Speed Y1-O Y2-O Occupied UnoccupiedBelow setNoOff Off High 0-v/Off 0-v/Off VENTMIN ClosedOn Off High 24-v/On 0-v/Off VENTMIN ClosedOn On High 24-v/On 24-v/On VENTMIN ClosedYesOff Off High 0-v/Off 0-v/Off VENTMIN ClosedOn Off High 0-v/Off 0-v/Off VENTMIN to Full-Open Closed to Full-OpenOn On High 24-v/On 0-v/Off* VENTMIN to Full-Open Closed to Full-OpenAbove setNoOff Off High 0-v/Off 0-v/Off VENTMIN to VENTMAX ClosedOn Off High 24-v/On 0-v/Off VENTMIN L to VENTMAX ClosedOn On High 24-v/On 24-v/On VENTMIN H to VENTMAX ClosedYesOff Off High 0-v/Off 0-v/Off VENTMIN L to VENTMAX ClosedOn Off High 0-v/Off 0-v/Off VENTMIN to Full-Open Closed to Full-OpenOn On High DELAY [24-v/On 0-v/Off* VENTMIN to Full-Open Closed to Full-Open* With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2 –O after the delay if the call for Y1 ---I and Y2 ---Ihave not been satisfied.[ With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for secondstage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.