AAF UV05 Operation & Maintenance Manual
                                                  | |
Contents
| 
14 McQuay OM 751Description of OperationTable 8: UVC state names and numbersOFF Mode (State 9)Off mode is provided so that the UVC can be forced into a powered OFF condition. OFF modeis a “stop” state for the unit ventilator; it is not a power off state. OFF mode consists of asingle UVC state: OFF [9].When OFF mode becomes active, the UVC stops all normal heating, cooling, and ventilation(OA damper is closed), and fan operation ends. The UVC continues to monitor spaceconditions, indicate faults, and provide network communications (if connected to a network)in the OFF mode while power is maintained to the unit.While in OFF mode, the UVC does not maintain DA temperatures. If the space temperaturedrops below EHS while in the OFF mode, the UVC is forced into the Emergency Heat mode(see “Emergency Heat Mode (Super State)” on page 16).The space lighting output continues to operate based upon the current occupancy mode.Note – Special purpose unit modes such as Purge, Pressurize, and De-pressurize can force theUVC to perform “special” functions during which the display appears to be in the OFFmode.Figure 7: Off state diagramNormal UVC modes State names State numbersDecimal ASCII HexOFF OFF 9 9 57Night purge Night Purge 8 8 56Fan only Fan Only 10 A 65Emergency heat Full Heat 7 7 55Cant Heat 13 D 68AutoHeatHeat 5 5 53Cant Heat 11 B 66Low Limit 14 E 69CoolEconMech 1 1 49Mech 2 2 50Econ 3 3 51DA Heat 4 4 52Cant Cool 12 C 67Low Limit 15 F 70WARNINGOff mode is a “stop” state for the unit ventilator. It is not a “poweroff” state. Power may still be provided to the unit.OFF9UVC Mode ≠ OFFUVC Mode = OFFTransitionpoint |
This manual is suitable for:
manualsdatabase
Your AI-powered manual search engine