Configuring Automatic Fan Speed - Johnson Controls - 24-9890-1397 - T612DFH-4 - T612DFH-4+PIR - T612DFH-4 and T612DFH-4+PIR Thermostat Controllers with Fan Control and Occupancy Sensing Capability

T612DFH-4 and T612DFH-4+PIR Thermostat Controllers with Fan Control and Occupancy Sensing Capability Installation Guide

Brand
Johnson Controls
Product name
T612DFH-4 and T612DFH-4+PIR Thermostat Controllers with Fan Control and Occupancy Sensing Capability
Document type
Installation Guide
Document number
24-9890-1397
Document revision
B
Revision date
2021-01-07
Product status
Discontinued
Language
English

Use the Fan Menu parameter in the Installer Configuration Menu to set the available fan mode options. Use the FAN key to select the desired fan mode option.

When selection option (2): Low-Med-High-Auto is chosen in the Fan Menu parameter, the fan operates as shown in Figure 1. When selection option (3): Low-High-Auto is chosen in the Fan Menu parameter, the fan operates at only the low and high settings and ignores the medium setting (Figure 1). This operation applies to the Occupied mode when the fan is set to Auto.

Figure 1. Low-Med-High-Auto and Low-High-Auto Fan Operation
Table 1. Installer Configuration Menu
Parameter Appearing on Display Description and Default Selection Options
Pswrd Sets the protective access password to prevent unauthorized access to the Installer Configuration Menu.

Default: 0

Note: The default setting does not lock out access to the Installer Configuration Menu.
Range: 0 to 1,000
BI1 Configuration of Binary Input 1.

Default: None

(None): No function is associated with an input.

(Rem NSB): Remote Night Setback (NSB) via a time clock input, an occupancy sensor, or from a voltage-free contact. Contact open = Occupied; contact closed = Unoccupied.

(MotionNO*): Temporary occupancy request via a motion detector input. Contact open = Unoccupied. When the contact closes, the thermostat controller enters the Occupied mode for a specified TOccTime. Once the TOccTime begins, the thermostat controller remains in the Occupied mode if the contact is open, until the TOccTime expires. Advanced PIR occupancy functions using a Normally Open (N.O.) or Normally Closed (N.C.) remote PIR motion sensor.

(MotionNC*): Temporary occupancy request via a motion detector input. Contact closed = Unoccupied. When the contact opens, the thermostat controller enters the Occupied mode for a specified TOccTime. Once the TOccTime begins, the thermostat controller remains in the Occupied mode if the contact is closed, until the TOccTime expires. Advanced PIR occupancy functions using a Normally Open (N.O.) or Normally Closed (N.C.) remote PIR motion sensor.

(Window): Cancels the thermostat controller heating or cooling action when a window is open. The fan operation is only affected if the Fan Menu parameter is set to (4): On-Auto, and Auto is the selected fan mode. A Window alarm displays, indicating that the window needs to be closed to resume heating or cooling. The heating and/or cooling outputs are enabled only when the contact is closed.

* These settings disable any local override function. For PIR models, see the Occupancy Sensor Operation –T612DFH-4+PIR Thermostat Controller section.

BI2 Configuration of Binary Input 2.

Default: None

(None): No function is associated with an input.

(Door Dry): Door contact only has an effect if BI1 is set to MotionNO or MotionNC or if a PIR accessory cover is used. (See the BI1 parameter in this table.) The occupancy is now dictated via BI1, BI2, or PIR. Any motion detected sets the zone to Occupied status. The thermostat controller remains in the Occupied mode until the door contact switch opens momentarily, at which point the thermostat controller enters Standby mode. If more movements are detected, the Occupied mode resumes. While the door is open, any movements detected by the PIR sensor are ignored. Use a Normally Closed (N.C.) switching device. (Contact open = door open; contact closed = door closed.)

(RemOVR): Temporary occupancy request via a remote input. This override function is controlled by a manual remote occupancy override. When enabled, this condition disables the override capability of the thermostat controller.

(Filter): A Filter alarm is displayed. This alarm can be connected to a differential pressure switch that monitors a filter.

(Service): A Service alarm is displayed on the thermostat controller when the input is energized. This input can be tied into the air conditioning unit control card, which provides an alarm should there be a malfunction.

UI3 Configuration of Universal Input 3.

Default: None

(None): No function is associated with an input.

(COC/NH): Changeover Contact/Normally Heat: A dry contact input signals seasonal hot/cold water changeover. The contact closes when cold water is present. Valid only for two-pipe systems.

(COC/NC): Changeover Contact/Normally Cool: A dry contact input signals seasonal hot/cold water changeover. The contact closes when hot water is present. Valid only for two-pipe systems.

(COS): Changeover Analog Sensor: Used for hot/cold water changeover switching. Valid only for two-pipe systems. (Parameter Pipe No is set to 2.0.) If the water temperature is greater than 78°F/25.6°C, hot water is present. If the water temperature is less than 75°F/23.9°C, cold water is present.

Note: Choose the selection option (0): Cooling Only for the SeqOpera parameter to allow changeover to occur between Cooling Only and Heating Only. The changeover sensor does not operate in Cooling and Reheat, Heating and Reheat, or Cool/Heat Four-Pipe and Reheat applications.

(SS): Supply Air Sensor Monitoring

MenuScro Provides the option of having the display continuously scroll the parameters.

Default: on

(off): The scroll is inactive.

(on): The scroll is active.

AutoMode Enables the auto function to be visible within the MODE key menu. (The MODE key is the key at the far left of the thermostat controller cover.)

Default: off

(on): The auto function is active (Off-Auto-Heat-Cool). Provides automatic changeover between heating and cooling.

(off): The auto function is inactive (Off-Heat-Cool).

Lockout Selectable Lockout Levels for limiting end-user keypad interaction.

Default: 0

Lockout Level Function
Mode Setting Fan Setting Local Override Occupied Temperature Setpoints
(0) Access Access Access Access
(1) Access Access No Access Access
(2) No Access No Access Access Access
(3) No Access No Access No Access Access
(4) No Access No Access Access No Access
(5) No Access No Access No Access No Access
Pipe No Selectable number of pipes in the system.

Default: 4.0 Pipes

(2.0 Pipes): Limits the number of sequences of operation available from 0 to 3, and enables heat/cool operation from the same output.

(4.0 Pipes): Allows access to all sequences of operation from 0 to 5, and enables heat/cool operation from different outputs.

CntrlTyp Defines the control output for the type of valves used in the installation (T612 models).

Default: Floating

(On/Off): For Normally Open (N.O.) or Normally Closed (N.C.) 24 VAC two-position valves.

(Floating): For three-wire control of 24 VAC floating valves.

SeqOpera Determines the sequence of operation.

Default: 1

Sequence of Operation Default Based on AutoMode Parameter Setting
On Off
(0): Cooling Only (Off-Cool) Cool Cool
(1): Heating Only (Off-Heat) Heat Heat
(2): Cooling and Reheat(Off-Auto*-Heat-Cool) Auto Heat
(3): Heating and Reheat (Off-Heat) Heat Heat
(4):Cool/Heat Four-Pipe(Off-Auto*-Heat-Cool) Auto Heat
(5): Cool/Heat Four-Pipe and Reheat (Off-Auto*-Heat-Cool) Auto Heat
* Auto can be disabled with the AutoMode parameter.
Note: Choose the selection option (0): Cooling Only when using a changeover sensor to allow changeover to occur between Cooling Only and Heating Only.
Note: Default parameter settings are always equal to off when the mode is equal to off.
Fan Menu Sets the fan mode options.

Default: 4

(0): Low-Med-High: Three-speed configuration using three fan relays (L-M-H). The default is High.

(1): Low-High: Two-speed configuration using two fan relays (L-H). The default is High.

(2): Low-Med-High-Auto: Three-speed configuration with Auto Fan speed mode using three fan relays (L-M-H). The default is High.

(3): Low-High-Auto: Two-speed configuration with Auto Fan speed mode using two fan relays (L-H). The default is High.

(4): On-Auto: One-speed configuration, (H) Auto is for Fan on demand and On is for Fan on all the time. The default is Auto.

St-By TM Sets the Standby timer value (PIR models).

Default: 0.5 hours

Time delay between the moment the PIR cover detected the last movement in the area and the time at which the thermostat controller Standby mode and setpoints become active.

Range: 0.5 to 24.0 hrs adjustable in 0.5-hour increments

Unocc TM Sets the Unoccupied timer value (PIR models).

Default: 0.0 hours

Time delay between the moment the thermostat controller toggled to Standby mode and the time at which the thermostat controller Unoccupied mode and setpoints become active. Setting this parameter to the factory value (0.0 hours) disables the Unoccupied timer. Using the 0.0 hours setting prevents the thermostat controller from switching from Standby mode to Unoccupied mode when using PIR functions.

Range: 0.0 to 24.0 hrs adjustable in 0.5-hour increments

St-By HT Sets the Standby heating setpoint (PIR models).

Default: 69.0°F/20.5°C

The value of this parameter should reside between the Occupied and Unoccupied heating setpoints, and ensure that the difference between the Standby and Occupied value can be recovered in a timely fashion when movement is detected in the zone.

Range: 40.0°F/4.5°C to 90.0°F/32.0°C

St-By CL Sets the Standby cooling setpoint (PIR models).

Default: 78.0°F/25.5°C

The value of this parameter should reside between the Occupied and Unoccupied cooling setpoints, and ensure that the difference between the Standby and Occupied value can be recovered in a timely fashion when movement is detected in the zone.

Range: 54.0°F/12.0°C to 100.0°F/37.5°C

Unocc HT Sets the Unoccupied heating setpoint value.

Default: 62.0°F/16.5°C

Range: 40.0°F/4.5°C to 90.0°F/32.0°C
Note: When adjusting the temperature, press the UP/DOWN arrow keys to change the temperature in 0.5F°/0.5C° increments; press and hold the UP/DOWN arrow keys to change the temperature in 5.0F°/5.0C° increments.
Unocc CL Sets the Unoccupied cooling setpoint value.

Default: 80.0°F/26.5°C

Range: 54.0°F/12.0°C to 100.0°F/37.5°C
Heat max Sets the Occupied and Unoccupied maximum heating setpoint values.

Default: 90.0°F/32.0°C

Range: 40.0°F/4.5°C to 90.0°F/32.0°C
Cool min Sets the Occupied and Unoccupied minimum cooling setpoint values.

Default: 54.0°F/12.0°C

Range: 54.0°F/12.0°C to 100.0°F/37.5°C
Pband Sets the proportional band used by the thermostat controller Proportional-Integral (PI) control loop.

Default: 3.0F°/1.7C°

Note: The proportional band default setting of 3.0F°/1.7C° provides satisfactory thermostat controller operation in most instances. A proportional band setting other than the default is normally used in installations where the location of the thermostat controller is problematic, leading to unwanted cycling. An example of a problematic installation is a wall-mounted thermostat controller installed between the return and supply air feeds, that is directly influenced by the supply air stream.

(3): 3.0F°/1.7C°

(4): 4.0F°/2.2C°

(5): 5.0F°/2.8C°

(6): 6.0F°/3.3C°

(7): 7.0F°/3.9C°

(8): 8.0F°/4.4C°

(9): 9.0F°/5.0C°

(10): 10.0F°/5.6C°

Set type Provides the option of temporarily changing the heating or cooling setpoint by pressing the UP/DOWN arrow keys.

Default: permnent

(temporar): Local changes to the heating or cooling setpoints are temporary, and remain effective for the specified TOccTime.

(permnent): Local changes to the heating or cooling setpoints are permanently stored in the thermostat memory.

Spt Func Determines the operation and usage of the local setpoint interface by the user.

Default: Dual Stp

(Attch Stp): Single Occupied Setpoint Adjustment. The displayed setpoint is the setpoint from the last action taken by the thermostat controller, or the setpoint currently in use. Both the heating and cooling setpoints are changed simultaneously, while respecting the minimum configured deadband. If one setpoint is desired over the other, use the MODE key to toggle between the two setpoints.

(Dual Stp): Dual Occupied Setpoint Adjustment. The displayed setpoint is the setpoint from the last action taken by the thermostat controller, or the setpoint currently in use. The heating and cooling setpoints can be separated individually, allowing the minimum configured deadband to expand. If one setpoint is desired over the other, use the MODE key to toggle between the two setpoints.

TOccTime Sets the duration of the Temporary Occupancy Time when the heating or cooling setpoints in the Occupied mode are established by:
  • an override function enabled from a remote override (when the thermostat controller is in the Unoccupied mode)
  • a temporary heating or cooling setpoint

Default: 2.0 hrs

Range: 0.0 to 24.0 hrs adjustable in 1-hour increments
Deadband Sets the minimum deadband between the heating and cooling setpoints.

Default: 2.0F°/1.0C°

Range: 2.0F°/1.0C° to 5.0F°/2.5C° adjustable in 1.0F°/0.5C° increments
Cal RS Sets the desired room air temperature sensor calibration (offset). The offset can be added to or subtracted from the actual displayed room temperature.

Default: 0.0F°/0.0C°

Range: -5.0F°/-2.5C° to 5.0F°/2.5C° adjustable in 1.0F°/0.5C° increments
Aux cont Determines the auxiliary contact function and configuration.

Default: 0

(0) Not used, or used for reheat If the sequence of operation is set to reheat (2, 3, or 5), ignore this parameter.
(1) Auxiliary N.O.

Occupied = contact closed

Unoccupied = contact open

The output aligns with occupancy.
(2) Auxiliary N.C.

Occupied = contact open

Unoccupied = contact closed

(3) Auxiliary N.O.

Occupied and fan On = contact closed

Unoccupied and fan On or Off = contact open

The output aligns with occupancy and the fan on command.
(4) Auxiliary N.C.

Occupied and fan On = contact open

Unoccupied and fan On or Off = contact closed

Note: The contact toggles with the Occupied/Unoccupied schedule of the NSB contact on BI1, if used.
Auto Fan Affects the auto mode of operation for the following Fan Menu parameter selection options only:
  • (2): Low-Med-High-Auto
  • (3): Low-High-Auto

Default: AS

(AS AD): The fan is on Auto during occupied periods. The Med and High speeds operate automatically on a temperature error from the setpoint. The Low speed operates Auto on demand. When there is no demand, the Low speed shuts down. The Low speed is only reactivated when there is a heating or cooling demand.

(AS): The fan is always on during occupied periods. The fan is on Auto during unoccupied periods. The Low, Med, and High speeds operate automatically on a temperature error from the setpoint.

FL time Sets the maximum actuator stroke timing (floating CntrlTyp T612 models).

Default: 1.5 min

Range: 0.5 to 9.0 min adjustable in 0.5-minute increments
Cph Sets the maximum number of cycles per hour (on/off CntrlTyp T612 models).

Default: 4.0

Range: 3.0 to 8.0 cycles per hour
Reheat Sets the duty cycle time for reheat output (if Option 2, 3, or 5 is chosen in the SeqOpera parameter).

Default: 0

(1): 10 seconds (six cycles per minute), for various equipment with solid-state relays that withstand short duty cycles, such as electric heat.

(0): 15 minutes (four cycles per hour), for various equipment with mechanical relays or contactors controlling mechanical reheat systems.

UI3 dis Displays the supply or changeover temperature when UI3 is configured as an analog input (supply sensor or changeover sensor).

Default: -40°F/-40°C

Used as a diagnostic/service help, to troubleshoot and diagnose sensor operation.