Daikin MicroTech II Operation And Maintenance Manual

Also see for MicroTech II: Installation and Maintenance Installation and maintenance manual Installation and maintenance manual

Daikin MicroTech II Operation And Maintenance Manual Manual pdf 36 page image

OM 752-4 36 www.DaikinApplied.comdesCrIptIon of operatIonExternal Binary Input 3This input can be configured as a ventilation lockout (default) or exhaust interlock signal.Ventilation Lockout Input SignalThis input allows a single set of dry contacts to be used to signal the UVC to close theOA damper. When the contacts close (ventilation lockout signal), the UVC closes theOA damper. When the contacts open, the UVC returns to normal OA damper operation.Exhaust Interlock Input SignalThis input allows a single set of dry contacts to be used to signal the UVC that an ex-haust fan within the space is energized. The UVC repositions the OA damper to a useradjustable minimum position (Exhaust Interlock OA Damper Min Position Setpoint).When the contacts close (exhaust fan on signal), the UVC uses the value definedby the Exhaust Interlock OA Damper Min Position Setpoint as the new minimum OAdamper position regardless of IA fan speed. When the contacts open, the UVC returnsto normal OA damper operation.External Binary OutputsThe UVC is provided with three binary outputs that provide the functions described below.Figure 23: Binary outputsBinary Outputs3 relay type outputs w/signal voltageOutput 1: Relay output for light signalOutput 2: Fault signalOutput 3: Exhaust fan operationThese outputs are relay type outputs that are intended to be used with signal level volt-ages (24 VAC maximum) only. For wiring examples, see MicroTech II Unit VentilatorController IM 747.Note: Not all of the functions listed can be used at the same time. The UVC is provided withconfiguration parameters that can be adjusted to select which function will be used forthese outputs when multiple functions are indicated below.External Binary Output 1This output can only be used as a signal for space lights.Lights On/Off SignalThis relay output provides one set of Normally Open dry contacts that can be used tosignal the operation of the space lights. When the UVC is in occupied, standby, or by-pass occupancy modes, the relay output signals the lights ON (contacts closed). Whenthe UVC is in unoccupied occupancy mode, the relay output signals the lights OFF(contacts open).External Binary Output 2This output can only be used as a fault signal.Fault SignalThis relay output provides Normally Open, Normally Closed, and Common connectionsthat can be used to signal a fault condition. When a fault exists, the UVC energizes thisrelay output. When the fault or faults are cleared, the UVC de-energizes this relay output.External Binary Output 3This output can only be used to signal exhaust fan operation.