WS9 SERIES WALL MODULE
FOR USE WITH FAN COIL UNITS
PRODUCT INFORMATION
Display:
24.6 °C
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SCOPE OF APPLICATION
The WS9 Series wall module is a temperature control device with an LCD display designed on the basis of the standard 86 wall-mount installation box. The units feature Modbus communications, monitor the actual room temperature and the set temperature in real time to control the opening/closing of the valves in the fan coil units to regulate the room temperature. The WS9 Series wall modules provide anti-freeze protection, as well as manual and automatic fan speed control.
The WS9 Series wall modules work with fan coil units and regulate the room temperature by controlling the fan speed and the opening/closing of the valves. The modules usually work with the fan coil unit control valves.
PERFORMANCE HIGHLIGHTS
- Extra large LCD and operating interface
- Temperature display selection (room temperature or set temperature)
- Manual or automatic fan speed selection
- Anti-freeze protection
- Operating buttons lock/unlock
- Temperature range setting
- Standard 86 wall-mount installation box
- Modbus communication
- Timer OFF
- Energy-saving mode (activated by remote sensor/room card)
TECHNICAL PARAMETERS
| Communication protocol: | RS485 Modbus |
| Baud rate: | 4800/9600 (default) |
| OPERATING VOLTAGES: | 100-240VAC 50/60HZ 24VAC±10% 50/60HZ |
| CONTROL ACCURACY: | +1°C |
| CONTROL SIGNAL: | ON/OFF OUTPUT |
| LOAD CAPACITY FAN: | RESISTIVE LOAD 3A INDUCTIVE LOAD 1A |
| VALVE: | RESISTIVE LOAD 2A INDUCTIVE LOAD 0.6A |
| PROTECTION RATING: | IP20 |
| TEMPERATURE SETTING RANGE: | 10-32°C |
| TEMPERATURE DISPLAY RANGE: | 0-37°C |
| OPERATING TEMPERATURE: | -10 to 49°C |
| SHIPPING TEMPERATURE: | -30 to 60°C |
| RELATIVE HUMIDITY: | 5-90% RH NON-CONDENSATING |
| REMOTE SENSOR TYPE: | NTC20K |
ORDERING PART NUMBERS
| PART NUMBER | OPERATING VOLTAGES | APPLICATIONS | BACKLIGHT | VENTILATION MODE |
|---|---|---|---|---|
| WS9B2WB | 100-240VAC | 2-pipe | White | Yes |
| WS9B4WB | 100-240VAC | 4-pipe | White | Yes |
| WS9E2WB | 24VAC±10% | 2-pipe | White | Yes |
| WS9E4WB | 24VAC±10% | 4-pipe | White | Yes |
Note: The default Baud rate is 9,600 bit/s. If you require units with a Baud rate of 38,400 bit/s, please contact the marketing department.
PRODUCT DETAILS
OUTLOOK DESIGN
LCD
OFF SET OFF
18 H TEST SET UP E
AUTO
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Key Lock Indicator
Anti-Freeze Protection
Set Up
Temperature Display
Power Off
Set Point
Operation Modes
Valve Status (flashes when open)
Fan Status
FUNCTION
VALVE AND FAN CONTROL
The wall module reads the room temperature from the built-in sensor and maintains the set temperature by sending on/off commands to the valve. There are three fan speeds which can be set manually or automatically. In manual mode, the fan speed is adjusted by FH, FM and FL outputs. In automatic mode, the fan speed will be decided by the difference between the room temperature and the set value. The fan will shut down when the valve is not operating.
Figure 1. Automatic Fan Speed Control Algorithm
Difference between room and the set value
1°C: High fan speed
0.5°C: Medium fan speed
Low fan speed
Set value
-0.5°C: Medium fan speed
-1°C: High fan speed
Cooling
Heating
TEMPERATURE DISPLAY
Either the room temperature or the set temperature can be displayed. This can be done when installing and setting up the wall module.
BACKLIGHT
The backlight is activated when any button is pressed. It remains on for 8 seconds after the last button pressed. In setup mode, the backlight remains on for 60 seconds after the last button pressed.
KEYPAD LOCKOUT
It is possible to lock or unlock the keypad while the device is not in setting mode. When locked out, the keypad will be not respond when any of the buttons are pressed.
PRODUCT SIZE (mm)
Diagram showing dimensions: 86.0mm width, 64.0mm height, 10.4mm depth. Other dimensions indicated are 47.0mm, 32.6mm, 15.2mm, 18.0mm, 90.0mm.
OPERATION MODES
COMFORT MODE
In Comfort Mode, press the Up or Down button to set the temperature. Comfort Mode includes cooling, heating and automatic functions.
24.8 °C
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VENTILATION MODE
Press the mode key to enter Ventilation Mode. In Ventilation Mode, the fan will run at the manually set speed, with the valves shut down.
24.8 °C
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ANTI-FREEZE MODE
Anti-Freeze Mode is an option when heating. In Anti-Freeze Mode, when the room temperature falls below 6°C, the wall module (in OFF status) will begin heating automatically until the room temperature reaches 8°C.
OFF
05.0 °C
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PRODUCT WIRING DIAGRAM
Part number: WS9B2WB/U
Two-Pipe Application
WIRING DIAGRAM
220V 2-wired
Motorized valve wiring diagram
Diagram showing connections for a two-pipe application with a 220V supply, including motorized valve, fan, room key card/NTC20K, and Modbus connections.
Part number: WS9E2WB/U
Two-Pipe Application
WIRING DIAGRAM
24V 2-wired
Motorized valve wiring diagram
Diagram showing connections for a two-pipe application with a 24V supply, including motorized valve, fan, room key card/NTC20K, and Modbus connections.
Part number: WS9B4WB/U
Four-Pipe Application
WIRING DIAGRAM
220V 4-wired
Motorized valve wiring diagram
Diagram showing connections for a four-pipe application with a 220V supply, including motorized valve (Vc1, Vo1, Vc2, Vo2), fan, room key card/NTC20K, and Modbus connections.
Part number: WS9E4WB/U
Four-Pipe Application
WIRING DIAGRAM
24V 4-wired
Motorized valve wiring diagram
Diagram showing connections for a four-pipe application with a 24V supply, including motorized valve (Vc1, Vo1, Vc2, Vo2), fan, room key card/NTC20K, and Modbus connections.
TERMINAL DEFINITION
| SYMBOL | DESCRIPTION |
|---|---|
| vC2 | Cooling valve is closed (four-pipe only) |
| v02 | Cooling valve is open (four-pipe only) |
| N | Power neutral wire |
| vC1 | Heating/cooling valve is closed |
| v01 | Heating/cooling valve is open |
| L | Power live wire |
| FH | High fan speed |
| FM | Medium fan speed |
| FL | Low fan speed |
| GND | |
| RSB/RS | Room key card/NTC20K |
| D+ | Modbus 485+ |
| D- | Modbus 485- |
TROUBLESHOOTING
| SYMPTOM | SOLUTION |
|---|---|
| FAILS TO ACTIVATE |
|
| FAILS TO ACTIVATE |
|
| DOES NOT WORK |
|
| DOES NOT WORK |
|
Honeywell Environmental and Combustion Controls (Tianjin) Co., Ltd.
No. 158, Nanhai Road, Tianjin Economic-Technological Development Area
Postal Code: 300457
Tel: +86-22-66287000
Fax: +86-22-25325214
All specifications are subject to change without notice.
HBT-G.C.-Building-FDFMD-APR-2020-EN01
THE FUTURE IS WHAT WE MAKE IT
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