Setup and Adjustments
Since the room thermostats are battery-powered devices with internal memory, they can be configured prior to, or right after, installation. Johnson Controls recommends that all of the room thermostats be configured before installation, to prevent any possible issues with operation.
LCD – See Figure 5
for LCD Details
Shoulder Mode Button –
Triggers Manual Shoulder
(Unoccupied) Mode
Up Button –
Increases the Room
Temperature Setpoint
Override Mode Button –
Triggers Manual Override
(Occupied) Mode
Down Button –
Decreases the Room
Temperature Setpoint
Light Button – Lights the
Display for 10 Seconds
Figure 4: WT-4000 Series Pneumatic-to-DDC Room Thermostat
Button Descriptions
Operating Mode Wireless Connection Status
Room Temperature or
Requested Setpoint
(When Up or Down
Buttons are Pressed)
Actual Branch
Line Pressure (psig)
Received Signal
Strength Indicator
Number of Routes to the
WT-BAC-IP Gateway
Battery Voltage Level
Heat or Cool Output
Fan Output
Requested Branch
Line Pressure (psig)
Error Code Display
Figure 5: Expanded View of LCD Showing Details
6 WT-4000 Series Pneumatic-to-Direct Digital Control (DDC) Room Thermostats Installation Instructions
LCD Details
Operating Mode
a.
Occupied – Scheduled Occupied Mode: The temperature can be adjusted within the
Comfort Zone.
b.
Unoccupied – Scheduled Unoccupied
Mode: The HVAC controls are off and the temperature cannot be adjusted. To turn the
HVAC controls on, press the Override button
to put the room thermostat in the
Override mode, and then adjust the temperature setting using the Up/Down buttons.
c.
Override – Manual Override Mode: The temperature can be adjusted within the
Comfort Zone.
d.
Shoulder – Manual Unoccupied Mode: The temperature cannot be adjusted. To put the room thermostat back to its scheduled mode, press the Shoulder button again;
Occupied reappears on the main screen.
Wireless Connection Status
Indicates if the room thermostat is connected to the
WT-BAC-IP Gateway.
a.
: A connection is established.
b.
Blank: There is no connection.
Number of Routes to the WT-BAC-IP Gateway
Indicates how many communication paths exist between the room thermostat and the WT-BAC-IP
Gateway.
a.
Blank: The room thermostat is not connected to the WT-BAC-IP Gateway.
b.
1: One connection exists.
c.
2: Two or more connections exist and the room thermostat is operating properly.
Battery Voltage Level
a.
: The battery is fully charged.
b.
: The battery charge is low and the batteries should be replaced.
Heat or Cool Output
a.
: Cooling is on.
b.
: Heating is on.
Requested Branch Line Pressure – psig (kPa)
Indicates the required branch line pressure based on the control calculation.
Actual Branch Line Pressure – psig (kPa)
Indicates the measured values of the branch line pressure. The actual branch line pressure should be within 0.6 psig (4 kPa) of the requested branch line pressure.
Display Codes
Table 1: Display Codes
Description
2
4
Display
Code
0 psig (0 kPa) available in main line
Insufficient branch line pressure
8
12
16
22
24
512
1024
Any
Other
Number
Pressure down leak in the system (pressure decreases when it should remain constant)
Insufficient branch line pressure and pressure down leak in the system
Pressure up leak in the system (pressure increases when it should remain constant)
Insufficient branch line pressure and pressure up leak in the system
Both pressure down leak and pressure up leak in the system
Configuring wireless network
Time and Date need to be configured
(Stand-Alone Mode)
Product error; contact the local
Johnson Controls representative
WT-4000 Series Pneumatic-to-Direct Digital Control (DDC) Room Thermostats Installation Instructions 7
Received Signal Strength Indicator
Indicates the relative strength of the wireless signal between the room thermostat and the device it is communicating with.
a.
-39 and higher: A strong and solid wireless connection exists; no further analysis is required.
b.
-44 to -40: The wireless signal is getting through; however, the room thermostat should be monitored. If the signal strength deteriorates further, there is a risk of data loss.
Consider adding a WT-ROUTER Router between the devices to strengthen the signal.
c.
-45 and lower, or --- : The room thermostat has a very weak wireless connection or it is failing to connect to other devices on the network, resulting in the loss of a significant number of data packets. The room thermostat may be located too far from the other devices or there may be wireless interference in the area. To strengthen the wireless signal, add a
WT-ROUTER Router between the problematic devices on the network to create an additional connection point.
Room Temperature or Requested Setpoint
Indicates the current room temperature. Pressing the
Up/Down buttons once shows the locally-defined setpoint temperature.
Adjusting the Room Setpoint Temperature
The WT-4000 Series Room Thermostat operates in conjunction with the preset building configuration parameters; therefore, the room setpoint temperature can only be changed within predefined Comfort Zone limits.
1.
Confirm that the room thermostat is in the scheduled Occupied Mode; the top of the LCD must read Occupied.
2.
The temperature reading on the LCD displays the current room temperature. To increase or decrease the room setpoint temperature, press the Up/Down buttons to select the desired setpoint.
a.
When the Up/Down buttons are pressed once, the LCD shows the user-defined room setpoint value and the LCD reads Setpoint.
Note: When the room temperature and the setpoint value are the same, the HVAC equipment is off.
b.
If neither the Up or Down button is pressed again, the LCD returns to the main screen within 5 seconds.
c.
When the setpoint is displayed, keep pressing the Up/Down buttons to reach the desired room setpoint temperature.
d.
If the Up/Down buttons are pressed and the setpoint stops increasing or decreasing, predefined Comfort Zone limits have been reached. If the setpoint does not change, the local controls are disabled.
Note: Contact the building administrator if the room temperature minimum or maximum allowable settings are not comfortable.
e.
The room thermostat decides to heat or cool based on the current room temperature and the specified setpoint.
3.
When the desired setpoint is specified, the LCD returns to the main screen within 5 seconds.
4.
If the LCD reads Unoccupied, the room thermostat is scheduled to be in the Unoccupied
Mode. If the area requires heating or cooling while the room thermostat is in the Unoccupied Mode, press the Override button to change the
room thermostat to the Override Mode. See Using
the Override Mode Button that follows.
Using the Override Mode Button
If the LCD reads Unoccupied, the room thermostat is scheduled to be in the Unoccupied Mode and the local room thermostat controls are disabled. If the area requires heating or cooling:
1.
Press the Override button to change the room thermostat to the Override Mode.
2.
The room thermostat stays in the Override Mode, as defined by the configuration parameters (default
2 hours). The room setpoint temperature can be adjusted within predefined Comfort Zone limits for the duration of the Override Mode period.
3.
See Step 2 in the Adjusting the Room Setpoint
Temperature section to change the room setpoint
temperature.
4.
Once the Override Mode period expires, the room thermostat returns to its originally scheduled mode.
If the heating or cooling period needs to be extended, press the Override button again
and follow Step 2 in the Adjusting the Room
Setpoint Temperature section.
8 WT-4000 Series Pneumatic-to-Direct Digital Control (DDC) Room Thermostats Installation Instructions
Using the Shoulder Mode Button
The Shoulder Mode button allows the WT-4000 Series
Room Thermostat to be placed into a shallow setback mode. When the room thermostat is activated, it does not use HVAC equipment as long as the temperature is within the Shoulder Mode configured setpoint limits
(default ±5F° [±3C°]).
For example, with a setpoint of 70°F (21°C) and the
Shoulder Mode activated, the room thermostat does not turn the HVAC equipment on as long as the room temperature is between 65 and 75°F (18 and 24°C).
Use the Shoulder Mode to save energy when a room or zone is vacated earlier than when the Unoccupied
Mode is scheduled to begin.
1.
Press the Shoulder button
Shoulder Mode.
to activate the
2.
The Shoulder Mode period has a limited duration; the room thermostat goes back to its regularly scheduled mode at the next scheduled Unoccupied
Mode change.
3.
Press the Shoulder button the Occupied Mode.
again to return to
Configuration
The following steps describe pre-installation, device-level configuration.
Room Thermostat Configuration Mode
1.
Bend the four locking tabs on the wallplate outward to separate the wallplate from the room thermostat.
2.
Install the four 3.6 V lithium batteries included with the room thermostat into the battery compartment.
Be sure to match the positive (+) battery ends with the positive (+) battery terminals in the battery compartment.
3.
Once powered up, the room thermostat initializes in: a.
30 seconds if the room thermostat can connect to a network.
b.
3 minutes if a network is not present.
IMPORTANT: Do not press any buttons during the initialization process. Configuration changes made during initialization are not saved.
Figure 3 illustrates the LCD during room
thermostat initialization.
4.
Press and hold the Shoulder button and the
Override button simultaneously for
6 seconds to set the room thermostat in the
Configuration Mode. Initially, the LCD changes to
the firmware version screen (Figure 6), and then
after 10 seconds the configuration menu appears
(Figure 7).
5.
Use the Up/Down buttons to navigate through the room thermostat menu. All further configuration settings must be made while in the Configuration
Mode.
Note: If the configuration screen is left idle for
10 seconds, it returns to the normal operation screen.
DF: Display Firmware Number
RF: Radio Module Firmware Number
CH: Radio Channel Number
GI: Device Network Group ID
DI: Unique Thermostat Device ID
Firmware
DF 0. 3. 37
RF 1. 16. 14
CH 11
GI 111.111
DI 71.40
Figure 6: WT-4000 Series Room Thermostat Firmware Version Screen
WT-4000 Series Pneumatic-to-Direct Digital Control (DDC) Room Thermostats Installation Instructions 9
Net Config Screen
1.
While in the Configuration Mode, press the
Up/Down buttons to select the Net Config option
(Figure 7).
Mesh
Net Config
Fan Mode
Standalone
Maintenance
Figure 7: Selecting Net Config
Maintenance – Pneumatic Settings
1.
While in the Configuration Mode, press the
Up/Down buttons to select the Maintenance option
(Figure 9).
Mesh
Net Config
Fan Mode
Standalone
Maintenance
Figure 9: Selecting Maintenance
2.
Press to confirm the selection.
3.
Press the Up/Down buttons to select CH to change the radio channel number, GI to change the device network group ID, and DI to change the unique
thermostat device ID (Figure 8).
2.
Press to confirm the selection.
3.
Press the Up/Down buttons to select the
Dir Acting, SP Psi, Gain, Prop Bnd, or Unoc Psi
option (Figure 10).
Network
Information
CH 11
GI 111.111
DI 71.40
Dir Acting
SP Psi
Gain
Prop Bnd
Unoc Psi 0.0
Figure 10: Selecting the Pneumatic Settings
Figure 8: Selecting CH, GI, or DI
4.
Press to confirm the selection. The LCD returns to the normal operation screen, and the settings are effective immediately.
4.
Press to edit the selected option, which is highlighted on the menu.
5.
Change the direction as desired (Figure 11).
Dir Acting
SP Psi
Gain
Prop Bnd
Unoc Psi
9.0
0.0
Figure 11: Changing the Direction
a.
Press the Up button acting (Dir Acting).
+
to enable direct b.
Press the Down button acting (Rev Acting).
-
to enable reverse
10 WT-4000 Series Pneumatic-to-Direct Digital Control (DDC) Room Thermostats Installation Instructions
6.
Press to confirm the selection.
7.
Change the setpoint pressure as desired
(Figure 12).
Dir Acting
SP Psi
Prop Bnd
Unoc Psi
0.0
Figure 12: Changing the Setpoint Pressure
11. Change the proportional band – proportional
range/throttling range as desired (Figure 14).
Dir Acting
SP Psi
Gain
Prop Bnd
Unoc Psi
9.0
0.0
Figure 14: Changing the Proportional Band –
Proportional Range/Throttling Range
a.
Press the Up button
+
to increase the branch line pressure at setpoint. The valid range is 1 to 22 psig (7 to 152 kPa), adjustable in increments of 0.5 psig (3 kPa). The default setting is 9 psig (62 kPa).
b.
Press the Down button
-
to decrease the branch line pressure at setpoint.
8.
Press to confirm the selection.
9.
Change the gain/sensitivity as desired
(Figure 13).
Dir Acting
SP Psi
Prop Bnd
Unoc Psi 0.0
Figure 13: Changing the Gain/Sensitivity
a.
Press the Up button
+
to increase the proportional band – proportional range/ throttling range. The valid range is 0 to 10F°
(0 to 6C°), adjustable in increments of 1F°
(0.6C°). The default setting is 6F° (3.6C°).
b.
Press the Down button
-
to decrease the proportional band – proportional range/ throttling range.
12. Press to confirm the selection.
13. Change the unoccupied mode pressure as
desired (Figure 15).
Dir Acting
SP Psi
Prop Bnd
Unoc Psi 0.0
Figure 15: Changing the Unoccupied Mode
Pressure
a.
Press the Up button
+
to increase the gain/sensitivity. The valid range is 1 to 5 psi/F°
(13 to 65 kPa/C°), adjustable in increments of
0.5 psig (3 kPa). The default setting is 2 psi/F°
(26 kPa/C°).
b.
Press the Down button gain/sensitivity.
-
to decrease the
10. Press to confirm the selection.
a.
Press the Up button
+
to increase the branch line pressure during Unoccupied Mode periods. The valid range is 0 to 22 psig (0 to
152 kPa), adjustable in increments of 0.5 psig
(3 kPa). The default setting is 0 psig (0 kPa).
b.
Press the Down button
-
to decrease the branch line pressure during Unoccupied Mode periods.
WT-4000 Series Pneumatic-to-Direct Digital Control (DDC) Room Thermostats Installation Instructions 11
14. Press to confirm the selection.
15. Press to go back to the previous screen button when done.
Note: If the configuration screen is left idle for
10 seconds, it returns to the normal operation screen.
Commissioning
Table 2 includes a list of configurable settings that
define how WT-4000 Series Room Thermostat pneumatic pressure commands correlate with the temperature values. Refer to the HVAC equipment documentation or service personnel for the actual values that should be configured on the room thermostat.
Table 2: WT-4000 Series Room Thermostat Configurable Settings
Settings Details Range Increments System
Defaults
Net Config
Direction
Setpoint, psig (kPa)
Gain/
Sensitivity
Proportional
Band –
Proportional
Range/
Throttling
Range
Unoccupied
Mode, psig (kPa)
Operational
CH – to change the radio channel number 11 through 26
GI – to change the device network group ID Two fields separated by a period; both fields are 1 through 255
DI – to change the unique thermostat device ID Two fields separated by a period; first field is 1 through 159, and second field is
1 through 246
Pneumatic
Direct acting – branch line pressure increase turns on cooling; decrease turns on heating
N/A
Reverse acting – branch line pressure increase turns on heating; decrease turns on cooling
Branch line pressure when the room temperature and setpoint are equal (heating and cooling outputs are off)
Branch line pressure change needed to change the room temperature by 1F° (0.6C°)
Temperature range that represents movement of the controlled device from fully closed to fully open; typically 6F° (3.6C°) or 4 psi (28 kPa)
Branch line pressure during the Unoccupied
Mode (heating and cooling outputs are off)
1 to 22 psig
(7 to 152 kPa)
1 to 5 psi/F°
(13 to 65 kPa/C°)
0 to 10F°
(0 to 6C°)
0 to 22 psig
(0 to 152 kPa)
1
1
1
N/A
0.5 psig
(3 kPa)
0.5 psig
(3 kPa)
1F°
(0.6C°)
0.5 psig
(3 kPa)
11
111.111
71.40
Direct acting
9 psig
(62 kPa)
2 psi/F°
(26 kPa/C°)
6F°
(3.6C°)
0 psig
(0 kPa)
12 WT-4000 Series Pneumatic-to-Direct Digital Control (DDC) Room Thermostats Installation Instructions