Carrier VVT Zone II Installation And Startup Manual

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Contents

Appendix A: VVT Zone II Points/PropertiesVVT Zone II Controller CARRIER CORPORATION ©2019Installation and Start-up Guide All rights reserved75Alarm ConfigurationNavigation: i-Vu® / Field Assistant: Properties > Control Program > Configuration > Alarm ConfigurationPoint Name/Description Default/RangeSpace Temperature AlarmOccupied Alarm Hysteresis – This value is added to the effective cooling setpoints andsubtracted from the effective heating setpoints as output from the Setpoint microblock.These values establish the occupied high and low limits that the space temperaturemust exceed before an occupied SPT alarm is generated. The alarm returns to normalwhen the space temperature drops below the high effective setpoint or rises above thelow effective setpoint.D:R:5 °F (2.7 °C)0 to 20 °F(0 to 11.1 °C)Alarm Delay (min/deg) – Determines the amount of delay before an occupied spacetemperature alarm is generated when the controller transitions to the occupied mode.The delay time equals this value multiplied by the difference between the sensortemperature and occupied alarm setpoint plus 15 minutes.D:R:10 minutes0 to 30 minutesUnoccupied Low SPT Alarm Limit –The value that the space temperature must dropbelow to generate a Space Temperature Alarm in the unoccupied mode. There is afixed hysteresis of 1 °F (.5 °C) for return to normal.D:R:45°F (7.2°C)35 to 90°F(1.6 to 32.2°C)Unoccupied High SPT Alarm Limit – The value that the space temperature must exceedto generate a Space Temperature Alarm in the unoccupied mode. There is a fixedhysteresis of 1 °F (.5 °C) for return to normal.D:R:95°F (35°C)45 to 100°F(7.2 to 37.7°C)Supply Air Temperature AlarmLow SAT Alarm Limit – The value that the supply air temperature must drop below togenerate a Supply Air Temp Alarm. There is a fixed hysteresis of 3 °F (1.6 °C) forreturn to normal.D:R:45°F (7.2°C)15 to 90°F(-9.4 to 32.2°C)High SAT Alarm Limit – The value that the supply air temperature must exceed togenerate a Supply Air Temp Alarm. There is a fixed hysteresis of 3 °F (1.6 °C) forreturn to normal. This should be set at least 15 °F (8.3 °C) higher than theMaximum Heating SAT.D:R:120°F (48.9°C)90 to 175°F(32.2 to 79.4°C)Space Humidity AlarmOccupied High RH Alarm Limit – The value that the relative humidity sensor mustexceed to generate a Space Humidity Alarm in the occupied mode if RH Control is setto Enable. There is a fixed hysteresis of 5%rh for return to normal.D:R:100%rh45 to 100%rhAlarm Delay (min/%RH) – Determines the amount of delay before an occupied RHalarm is generated when the controller transitions to the occupied mode. The delay timeequals this value multiplied by the difference between the sensor RH value and theoccupied RH setpoint plus 15 minutes.D:R:5 minutes0 to 30 minutesUnocc High RH Alarm Limit – The value that the relative humidity sensor must exceedto generate a Space Humidity Alarm in the unoccupied mode if RH Control is set toEnable. There is a fixed hysteresis of 5%rh for return to normal.D:R:100%rh45 to 100%rh