Page 1
WS8SERIES WALL
MODULE
FOR USE WITH FAN COIL
UNITS
• Extra-large LCD display 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
•
SCOPE OF APPLICATION
WS8 Series wall modules are designed for indoor temperature
control. It has large LCD display providing real time display of
room temperature or set temperature. With temperature set, it
will provide on/off control signal to the fan coil valve for
temperature regulation to the occupant’s desired comfort.
WS8 Series wall modules provide selectable automatic or
manual control of fan speeds. It also provides anti-freeze
function.
Ordering Part Numbers
Model
Number
WS8B2WB
/U
Backlight
White
Application
2-pipe
Ventilation
Mode
Technical Specification
Operating
Voltages
Load Capacity
Temperature
Setting Range
Emperature
Display Range
Operating
Temperature
Relative Humidity
Protection rating
Operating
Voltages
Yes
100-240Vac
100VAC-240VAC 50-60Hz
Resistive – Fan unit 3A; valve 2A
Inductive – Fan unit 1A; valve 0.6A
10~30°C
50~86°F
-10~50°C
14~99°F
-30~60°C
-22~140°F
5-90%RH, non condensating
IP20
WS8B4WB
/U
White
2/4-pipe
Yes
100-240Vac
Page 2
Product Design
Function
Outlook Design
LCD Display
KeyLock
Indicator
Freeze
Protection
SetUp
Temperature
Display
Valve And Fan Control
The wall module reads indoor temperature through integrated
temperature sensor and command valve to be opened or
closed to achieve set temperature. There are three fan speeds
which can be set manually or automatically. Under manual
mode, fan speed is adjusted by FH, FM and FL outputs. Under
automatic mode, the fan speed will depend on the difference
between the room temperature and set temperature. The fan
will shut down when the valve is not operating.
Highfanspeed
room
1°C
0.5°C
Medium fan
Low fan speed
speed
Settingvalue
between
temperature
-0.5°C
Difference
and set
Figure 1.
-1°C
Low fan speed
Medium fan
speed
Highfanspeed
Automatic Fan Speed Control Algorithm
Cooling
Heating
SetPoint
Power
Off
OperationModes
ValveStatus
(flickerwhen open)
Fan
Status
Temperature Display
Room temperature or set temperature can be set to be
displayed during the installation of the wall module.
Backlight
The Backlight will be activated when any button is
pressed and will last for 8 seconds upon the last
button pressed. In setting mode, the backlight will
remain turn on for 60 seconds upon the last button
pressed.
Keypad Lockout
It is possible to lock or unlock the keypad while
the device is not in setting mode. When in lockth
mode, the keypad will be inactive when pressing any
button.
Page 3
Dimensions (mm)
Anti-freeze mode
Anti-freeze mode is an option under the heating
mode. When selected, if room temperature falls
below 6C, the wall module (in off status) will be
activated in heating mode until it reaches 8C.
Operating Mode
Comfort Mode
In the comfort mode, press the Up or DownIn the
button to set the temperature. The comfort
mode is included in cooling, heating and
automatic
Ventilation Mode
Press the mode key to enter the ventilation mode.Pr
In ventilation mode, the fan speed will run as
manually set with the valve st
PRODUCT WIRING DIAGRAM
Part number: WS3B2WB/U
Two-Pipe Application
220Vac, motorized valve wiring diagram
Wiring diagram 2
Hot/cold water
valve
Fan
unit
Hot/cold water
valve
Fan
unit
Neutral
wire
Live wire
Neutral
wire
Live wire
3-wire motorized valve
Page 4
Part number: WS8B4WB/U 2-pipe
Application
Wiring diagram 1
2-wire motorized valve
Hot/cold water
Wiring diagram 2
3-wire motorized valve
Hot/cold water
erminal Designations
T
valve
Fan
unit
valve
Fan
unit
Neutral
wire
Live wire
Neutral
wire
Live wire
4-pipe Application
Wiring diagram 1
wire motorized valve
2-
Wiring diagram 2
3-wire motorized valve
Troubleshooting
Cold water
valve
Hot water
valve
Fan
unit
Cold water
valve
Hot water
valve
Fan
it
un
Neutral
wire
Live
wire
Neutral
wire
Live
wire
SYMBOL
vC2
vO2
N
vC1
vO1
FH
FM
L
FL
Description
Cooling valve is closed (for quadrup
le-pipe only)
Cooling valve is open (for quadruple-pipe only)
Power source neutral wire
Heating/cooling valve is closed
Heating/cooling valve is open
High fan speed
Medium fan speed
Power source live wire
Low fan speed
Symtoms
Fails To
ctivate
A
Fails To
Activate
Fails to work
Fails to work
Solution
Pressing to set the operation mode to
•
( heating mode).
Check whether the setting temperature
•
than the room temperature.
igher
•
Check whether the valve status ind icator
flickering.
•
Wait for 5 minutes, check whether the
system starts.
•
Pressing to set the operating mode to
( cooling mode).
C heck whether the setting temperature is
•
lower than the room temperature.
•
whether the valve status ind icator
Check
is
flickering.
•
Wait for 5 minutes, check whether the
cooling system starts.
•
Check if the button is locked.
•
Check if the device is in OFF mode
•
Check whether the buttons is locked.
• Check whether is in
•
Check whether is in the OFF state.
mode
is
is
heating
For more information,
https://honeywellbuildings.in
Call: 1-800-103-0339
Email: HBT-Indiabuildings@honeywell.com
Honeywell HBT India Buildings
Unitech Trade Center, 5th Floor, Sector-43,
Block C, Sushant Lok Phase - I,
Gurgaon - 122 002
www.honeywell.com
© 2020 Honeywell International Inc.
T6865 SERIES
2-PIPE FAN COIL
CONTROL
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