The T7350 Communicating Subbase(T7350CS) comes in two models, T7350H1009 and T7350H1017.

T7350H1009: This subbase is the Three Heat/Three Cool model. It allows for conventional or heat pump operation. A total of 8 relays are available with the thermostat cover assembly and subbase. The auxiliary relay may be configured for an economizer, TOD, or dehumidification. The subbase may be configured for 3 Heat/ 3 Cool or 2 Heat/ 4 Cool by using the third stage of heat for an additional stage of cooling.

T7350H1017: This subbase is the modulating subbase. A total of 4 relays are available with the thermostat cover assembly and subbase. The auxiliary relay may be configured for an economizer, TOD, dehumidification or an additional stage of heating and cooling.

See the section on Outputs for description on these relays.

This field specifies the operation in which this subbase is used. When the thermostat model is selected as T7350H1009, the equipment type can be selected as Standard or Heat Pump. The T7350H1009 subbase allows for conventional or heat pump operation.

When the model is selected as T7350H1017, the equipment type is changed to Standard and this option is disabled for selection. When the T7350H1017 model type is selected, the Heat Action and Cool Action options under Outputs are enabled for selection. The modulating subbase does not allow for heat pumps.

This option allows the user to configure the source of room temperature input to the thermostat. The T7350 thermostat is equipped with its own internal room temperature sensor. The sensor operating range is 30 deg F to 110 deg F.

The T7350 thermostat is compatible with the following Honeywell Wall Modules:

• T7770A1006

• T7770B1046

• T7770C1044

• T7770D1000

• T7771

Options available are

• Local : Configure as local if the internal temperature sensor on the thermostat is to be used to sense the room temperature.

• T7770A/D: The models T7770A1006 and T7770D1000 have only temperature sensors, and have no setpoint knob. Select this option when one of these family of wall modules are connected.

• T770B/C: The wall modules T770B1046 and T770D1000 have temperature sensors with setpoint knobs, override button and a LED.

• T7771: The T7771 wall module will have a temperature sensor, override button but instead of a setpoint knob, it will have an up/down buttons and 7 LEDs to indicate ( -3 deg F to +3 deg F) the user has selected.

• Network: Select this option if the space temperature is obtained over the network from other controllers. You have to create appropriate bindings for the input.

Note 1: Open, short or out-of-range on the internal or remote room temperature sensor input(s) to the thermostat will cause the outputs to be turned off. The fault detection is done only on the sensor being used. That is, if the internal(local) sensor is being used, faults on the remote sensor are ignored.

Use this option to configure the source of room humidity input to the thermostat. Options available are:

• None: Select this option when dehumidification is not required. When this option is selected, if the Aux DO output is configured as Simple Dehumid or Dehumid Hotgas BP, it is defaulted to Time Of Day option and the Simple Dehumid, Dehumid Hotgas BP options are not available for selection. The Dehumidification High Limit and Dehumidification Options in the Setpoints page are disabled.

• Local: The thermostat has an internal room relative humidity sensor, which has the range of 5% to 105%RH. For humidity less that 5% and above 105%, the sensor will show invalid and there will be a sensor fail alarm.

• Remote: A remote humidity sensor can be hardwired to the thermostat. Select this option when the humidity input is required from a remote sensor. The thermostat is compatible to H7631A1000 (0 to 10V) or equivalent sensors.

• Network: Select this option when the humidity input is required over the network from other controllers. You have to create appropriate bindings for the input.

Use this field to configure the source for discharge air temperature input. The following options are available:

• None: Select this if discharge temperature sensor is not connected. When this option is selected, the Enable Heating DAT HiLimit and Enable Cooling DAT Low Limit in Equip Control page are disabled.

• Remote: Select this option if a discharge air temperature sensor is hardwired to the thermostat. The thermostat is compatible with the C7770A1006, C7031B1033, C7031C1031, and C7031J1050 (averaging) 20K NTC temperature sensor elements (20 Kohms at 77 Deg.F).

Use this field to configure the source for outdoor air temperature input. The following options are available:

• None: Select this if outdoor air temperature sensor is not connected. When this option is selected, the Enable Heating OAT Lockout and Enable Cooling OAT Lockout options in the Equip Control page, cool and heat OAT at Min Ramp and OAT at Max Ramp fields in Setpoints page are disabled.

• Remote: Select this option if an outdoor air temperature sensor is hardwired to the thermostat. The thermostat is compatible with the following Honeywell outdoor air sensors: C7170A1002
  C7089A1002 PT3000 PTC temperature sensor element (3484 ohms at 77 Deg.F)

• Network: Select this option when the outdoor air temperature input is required over the network from other controllers. You have to create appropriate bindings for the input.

Use this field to configure the source for occupancy input. The following options are available:

• None: Select this if occupancy sensor is not connected.

• Remote: Select this option if an occupancy sensor is hardwired to the thermostat.

• Network: Select this option when the occupancy input is required over the network from other controllers. You have to create appropriate bindings for the input.

Use this option to configure the settings for daylight savings. The following describes each field:

Enable Daylight Savings: This option is enabled by default. Disable this option if the daylight savings feature is not required to be followed by the thermostat. Unselecting this option will disable the Start Month, Stop Month, Start Day and Stop Day fields.

Start Month: This field is available for configuration only if the Enable Daylight Savings option field is selected. Its default value is April. Change this option according to the daylight savings settings in the country where the thermostat is installed.

Start Day: This field is available for configuration only if the Enable Daylight Savings option field is selected. Its default value is First Sunday. Change this option according to the daylight savings settings in the country where the thermostat is installed.

End Month: This field is available for configuration only if the Enable Daylight Savings option is selected. Its default value is October. Change this option according to the daylight savings settings in the country where the thermostat is installed.

Start Day: This field is available for configuration only if the Enable Daylight Savings option is selected. Its default value is Last Sunday. Change this option according to the daylight savings settings in the country where the thermostat is installed.

• None
• One Stage
• Two Stage
• Three Stage ( Not available if configured for 4 stages of cooling)

• Heat Enable
• One Stage
• Two Stage (Used as auxiliary relay or second stage of heat or cool relay. Not available if used as second stage of cooling)

• None (No auxiliary heating)
• One Stage (of auxiliary heat)
• Two Stage(of auxiliary heat)

• None
• One Stage
• Two Stage
• Three Stage

• Heat Enable
• One Stage
• Two Stage (Used as auxiliary relay or second stage of heat or cool relay. Not available if used as second stage of heating)

• None
• One Stage
• Two Stage

When the model is selected as T7350H1009 and the equipment type is selected as Heat Pump, you will have option to configure for 0/1/2 auxiliary heating stages and 0/1/2 compressor stages. One relay is used for heat pump reversing valve.

When the model is selected as T7350H1017, you can configure for 0/1/2 heat or cool stages. The modulating outputs are always active. They are always being driven 0-100%. When the number of stages is 0, the relay outputs are used to enable the heating or cooling outputs. Staged action may be used in addition to the modulating outputs. The number of stages is set to 1 or 2. It is not possible to have both 2 stages of heating and cooling.

Examples:

Example 1: Selecting heating stages and cooling stages as 1 configures for modulating heat and modulating cool action.

Example 2: To have Mod heat, heating pump enable relay and 1 stage of heating, configure Heat Stages as Heat Enable, Heat Action (depends on the actuator connected) and connect the relay W1 such that it turns the heating pump ON or OFF.

Use this option to configure the auxiliary outputs. The auxiliary DO can be configured for econimizer, Time Of Day or for dehumidification. The dehumidification options available are Simple dehumid or Dehumid Hotgas BP.

In the case of T7350H1017 model type, the auxiliary DO can be configured for second stage of heating or cooling. In that case, it cannot be configured for the above mentioned purposes and hence the option is disabled in the screen.

Note: The dehumid options (Simple dehumid or Dehumid Hotgas BP) are available for configuration only if a humidity sensor is configured.

• Active Cooling
• Active Heating

Select Active Cooling when the O/B valve is energized on cooling or Active Heating if the O/B valve is energized on heating. If the standard application is configured, this option is not available.