Carrier 33CS Installation, Service, And Troubleshooting Instructions

Also see for 33CS: Owner's manual Owner's manual Operating guide Installation, start-up, and operating instructions Installation, start-up, and operating instructions

Carrier 33CS Installation, Service, And Troubleshooting Instructions Manual pdf 15 page image

will be shown. The range of acceptable values is 0 to 240minutes in 1-minute increments. Use the left set point but-tons to set the time limit to the desired value. The defaultvalue is 0 minutes.Fan/Filter Status Switch — The fan/filter status switchcan be configured to signal when the system fan is operatingor monitor the HVAC equipment filter and send a dirty filteralarm.NOTE: The humidity sensor and fan/filter status sensor can-not be wired at the same time, only one sensor can be used.To configure to monitor thermostat to use a fan/filter sta-tus switch, set category 5, option 11. A value of 0 configuresthe system for no sensor. A value of 1 configures the systemfor an indoor humidity sensor. A value of 2 configures thesystem for a fan/filter status switch. The default is 0.Category 5, option 10 configures whether the fan status orfilter status capability of the sensor is used. Set the option toON for a fan status switch. Set the option to OFF for a filterstatus switch. The default is OFF.Refer to the fan/filter status installation instructions formore information.CONTROL OF HEATING ANDCOOLING EQUIPMENTThe system heating and cooling equipment is operated bythe TEMP system thermostat in response to the zone con-ditions. The TEMP system thermostat uses the System Modeto determine the zone requirements of the system.The TEMP system thermostat can control the heating orcooling stages of the equipment and an economizer (ifapplicable).During equipment operation, zone temperature conditionscan be improving, staying the same, or becoming worse. TheTEMP system thermostat can analyze conditions to deter-mine the equipment staging.To protect the equipment, the TEMP system thermostatutilizes a time guard function to prevent excessive equip-ment cycling. To prevent excessive temperatures, the TEMPsystem thermostat can deenergize stages of equipment op-eration based on a comparison of supply-air temperatures tosystem operating limits which will turn off equipment. TheTEMP system thermostat can also lockout heating or cool-ing based on outside air temperature.Heating/Cooling Equipment Interface — Theheating/cooling equipment is interfaced to the TEMP sys-tem thermostat through a single zone relay pack.Through the relay pack, the TEMP system thermostat isable to control:• 2 stages of cooling• 2 stages of heating• fan operation• reversing valve operation/ auxiliary relay operationSystem Switches — The system switches are locatedon the bottom of the TEMP system thermostat. The systemswitches control the system mode function. See Fig. 10. Thesystem switches can be set to a fixed position (locked) throughconfiguration and can also be controlled from the networkthrough software.SYSTEM HEAT SWITCH — The TEMP system thermostatheat switch has 2 settings. When the heat switch is set toOFF, the TEMP system thermostat cannot select system heatmode. When the heat switch is set to AUTO, the TEMP sys-tem thermostat is able to select system heat mode.To control the heat switch setting, configure category 4,option 20. This range is from 0 to 2. When the option is setto 0, the thermostat will use the setting of its mechanicalcool switch. When the option is set to 1, the thermostat willperform as if the heat switch is set to AUTO (regardless ofthe mechanical heat switch setting). When the option is setto 2, the thermostat will perform is if the heat switch is setto OFF (regardless of the mechanical heat switch setting).The setting of 0 is the default setting.SYSTEM COOL SWITCH — The TEMP system thermo-stat cool switch has 2 settings. When the cool switch is setto OFF, the TEMP system thermostat cannot select systemcool mode. When the cool switch is set to AUTO, the TEMPsystem thermostat is able to select system cool mode.To control the cool switch setting, configure category 4,option 19. These range is from 0 to 2. When the option is setto 0, the thermostat will use the setting of the mechanicalcool switch. When the option is set to 1, the thermostat willperform as if the cool switch is set to AUTO (regardless ofthe mechanical cool switch setting). When the option is setto 2, the thermostat will perform is if the cool switch is setto OFF (regardless of the mechanical cool switch setting).The setting of 0, is the default setting.Fan Switch — The fan switch is located on the bottomof the TEMP system thermostat. The fan switch controls thesystem fan operation. See Fig. 10.When the fan switch is set to ON, the TEMP system ther-mostat energizes the fan relay continuously when the TEMPsystem thermostat is in occupied mode. The fan does notoperate in unoccupied mode.NOTE: When the TEMP system thermostat is in unoccupiedoverride mode, the fan operates as if it is in occupied mode.When the fan switch is set to AUTO, the TEMP systemthermostat energizes the fan relay only during the systemheating or system cooling modes.To control the fan switch setting, configure category 4,option 18. These range is from 0 to 2. When the option is setto 0, the thermostat will use the setting of its mechanical fanswitch. When the option is set to 1, the thermostat will per-form as if the fan switch is set to ON (regardless of the me-chanical fan switch setting). When the option is set to 2, thethermostat will perform is if the fan switch is set to AUTO(regardless of the mechanical fan switch setting). The set-ting of 0 is the default setting.Fig. 10 — System Switch Locations15