Onyx Controls ONX908FCT-4B/220V/RC User manual

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ONX908FCT-4B/220V/RC FAN COIL THERMOSTAT
Application: Heat/cool, 3speed fan, 4-pipe fan coil unit
Installation and operation instructions
SPECIFICATION:
Electrical Rating…………………… 220VAC
Terminal Load……………………… 5.0 A per terminal
Set point Temperature Range……….. 5℃to 35℃
Dimensions………………………… 115mm×90mm ×28mm
Color……………………………….. White
FEATURE:
Large LCD display with backlight
External input to activate energy saving mode available
Set points and room temperature display simultaneously
Maintains the temperature within the range of 0.5℃to the set point
Automatic fan with adjustable 3-speed fan.
Manual change over
Never lose user setting in the event of power-off, no battery is required
Display temperature recalibrates
OPERATION
The Thermostat Buttons and Switches The Display
8
11
9
7
6
5
4
3
2
1
10
Figure 1 Figure 2

①Power button
②System switch (HEAT, COOL)
③Fan switch (AUTO, LOW, MED, HIGH)
④Useless
⑤▲Raises Temperature setting
⑥▼Lower Temperature setting
⑦Room temperature
⑧Setting temperature
⑨Indicate fan switch position
⑩ Heat on shows when the thermostat
is calling for heat
Cool on shows when the thermostat
is calling for cool.
○
11 Shows system mode
INSTALLTHE THERMOSTAT
ATTACH THERMOSTAT BASE TO WALL
1.. Remove 2 screws from the bottom of
thermostat. Gently pull the control panel
straight off the base. Forcing or prying on the
thermostat will cause damage to the unit.
2. Connect wires beneath terminal screws on
power supply module using appropriate
wiring schematic. See figure 4
3. Push power base into 86mmX86mm
conduit box.
4. Using two mounting screws mount the power
base to the wall. Place a level against bottom
of base, adjust until level, and then tighten
screws. (Leveling is for appearance only and
will not affect thermostat operation.)
5. Replace control panel on the power base
and fix power base and control panel by
removed two screws in item 1
Screw for mounting thermostat to conduit box
Figure 3
Screw for fixing control panel and power base
Panel base
Control panel
WIRING DIAGRAM
POWER：220VAC ±10%
COOL
ON Valve
Valve
9
N
4
5
7
8
6
3
2
1
L
LOW
MED
HI
风机
Fan
COOL ONLY, 2 PIPE, 2 WIRE
SPSTVALVE FAN COIL UNIT
SYSTEM
COOL ONLY, 2 PIPE, 3 WIRE
SPDT VALVE FAN COIL
UNIT SYSTEM
COOL
OFF
COOL
ON
风机
Fan
HI
MED
LOW
L
1
2
3
6
8
7
5
4
N
99
N
4
5
7
8
6
3
2
1
L
LOW
MED
HI
风机
Fan
HEAT
ON
HEAT ONLY, 2 PIPE, 2 WIRE
SPST VALVE FAN COIL
UNIT SYSTEM
HEAT ONLY ,2 PIPE,3 WIRE
SPDT VALVE FAN COIL
UNIT SYSTEM
HEAT
OFF
HEAT
ON
风机
Fan
HI
MED
LOW
ON Valve
LOW
MED
HI
风机
Fan
HEAT OR COOL, 2 PIPE, 2
WIRE SPST VALVE FAN
COIL UNIT SYSTEM
VALVE OFF
VALVE
ON
风机
Fan
HI
MED
LOW
HEAT ON
COOL ON
LOW
MED
HI
风机
Fan
L
L
N
1
2
3
6
8
7
5
4
N
9
3
2
1
N
L
5
7
8
6
4
N
3
2
1
L
3
2
1
5
7
8
6
Valve
5
Valve
7
8
6
4 4
NOTE
HEAT OR COOL, 2 PIPE, 3
WIRE SPDT VALVE FAN
COIL UNIT SYSTEM
9 9 9
N
L
3
2MED
HI
1
5COOLOFF
7
8
HEAT OFF
HEAT ON
COOLON
6
风机
Fan
4LOW
HEAT/COOL 4 PIPE , 3 WIRE
SPDT VALVE, FAN COIL
SYSTEM,
9
HEAT/COOL, 4 PIPE, 2 WIRE
SPST VALVE FAN COIL UNIT
SYSTEM
3 WIRE VALVE
：2 WIRE VALVE
：FAN
风机
Fan
Valve
10
11
Occupancy
Switch Card
Figure 4
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CHECKTHERMOSTATOPERATION
Switch on the thermostat
Fan operation
1. Push fan button, display will show
and Auto separately means fan rotate in HI
MED LOW or AUTO speed.
2. If you select AUTO speed, fan operation will
change speed according to the difference
between the room temperature and set
temperature. If room temperature is 3℃
higher than setting temperature in cooling
or3 lower than setting temperature in℃
Heating. Fan will run in HI speed. If room
temperature is 2℃- 3 higher than setting℃
temperature in cooling or 2℃-3 lower than℃
setting temperature in Heating. Fan will run
in Medium speed. If room temperature is
0℃-2 higher than setting temperature in℃
cooling or 0℃-2 lower than set℃ting
temperature in Heating. Fan will run in Low
speed.
Heat system operation
1. Press system switch to heat mode ( )
2. Press “▲” to adjust the thermostat setting
above the room temperature. The heating
system should start to operate.
3. Press “▼“ to adjust the thermostat setting
below the room temperature. The heating
system should stop operating.
Cooling system operation
1. Press system switch to cool mode ( )
2. Press “▼“ to adjust thermostat setting below
room temperature. The cooling system
should start to operate.
3. Press “▲” to adjust temperature setting
above room temperature. The cooling
system should stop operating
Energy Saving Mode
Energy Saving mode is activated by a special input from a card key, occupancy switch or window
contact switch. If the signal via input terminals 10 and 11 is calling for energy saving mode. Then the
thermostat will control to user/installer defined setback setpoints for increased energy savings. The
display will show symbol to indicate when this mode is active. The energy setpoint can be
change in configuration item No.7 and No. 8. Factory default setting for heating is 18℃, for cooling is
25℃.
For example, if the user setpoint is 21℃and the energy Savings Mode setpoint for cooling
(unoccupied cooling setpoint) has been set to 28℃, then the thermostat will control to 28℃when the
input signal activated the Energy Saving mode. .
The energy saving mode input can be configured within the configuration menu 9 to be activated
either a short circuit (default) or open circuit signals.
CONFIGURATION
11
10
CARD KEY
The configuration menu allows you to set certain thermostat operating characteristics to your system or
personal requirements. Switch off the thermostat and hold the sleep operation Button for over 3 second till④
power on again means you have entered the first configuration menu item. There are 6 menu items. Press
button to change to the next item. To exit the menu and return to the normal operation, switch off the④
thermostat and switch it on again. If no keys are pressed within 20 seconds the thermostat will be switched off.
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Step Press buttons Displayed（factory default）Press▲、▼to select Descriptions
1 ④3 seconds 01 (0) -3 --- +3 Adjust temperature coefficient
2 ④02 （35℃） 20℃—35℃Select maximum setting temperature for heating
3 ④03 （5℃） 5℃—20℃Select minimum setting temperature for cooling
4 ④04 (rE) rd, rE Memorize option before power loss
5④05 （1 ）1、2、3 Display backlight option
6 ④ 06 (On) OFF/On Fan stop option
7 ④ 07 (18℃) 10-18℃ Energy setpoint for heating
8 ④ 08 (25℃) 25-30℃ Energy setpoint for cooling
9 ④ 09 (SC) SC/OC/00 Activate energy saving mode option
1) Select temperature recalibrates Adjustment 3 LO to 3 HI -
You can adjust the room temperature display up to 3 higher or lower. Your thermostat was accurately
calibrated at the factory but you have the option to change the display temperature to match your previous
thermostat.
2) Select maximum temperature for heating.
This feature provides a maximum setpoint temperature for heat. The default setting is 35℃, It can be
changed between 30℃to 35℃
3) Select minimum temperature for cooling
This feature provides a minimum setpoint temperature for cooling. The default setting is 5℃, It can be
changed between 5℃to 20℃
4) Memorize option before power loss
Using ▲& ▼button to select between “rE” and “rd”. “rE” means the thermostat will Memorize its ON
or OFF status before power loss. After power supply comes to normal again, the thermostat will remain ON or
OFF according to what it is before power loss. “rd” means no matter the thermostat is switched on or off before
power loss, after the power supply comes to normal again the thermostat will keep power off
5) Display backlight option
Select 1 the light will be on when any button of the thermostat is touched. Select 2 the display will keep the
light on continuously. Select 3 the display will keep the light off continuously Factory default is 1
6) Fan stop option
Using ▲& ▼button to select between “On” and “OFF”. If you select “On”, the thermostat will turn on the
fan at a speed provided by the Fan Switch and will not stop the fan when there is no call for heat or cool. If you
select “OFF”, the thermostat will stop the fan when there is no call for heat or cool.
7) Select energy saving setpoint for heating
This feature provides energy saving setpoint temperature for heating. The default setting is 16℃, It can be
changed between 10℃to 18℃
8) Select energy saving setpoint for cooling
This feature allows you to set energy saving setpoint temperature for cooling. The default setting is 25℃, It
can be changed between 25℃to 30℃
9) Activate energy saving mode option
This feature allows you to select the way to activate the energy saving mode.
Select OC to activate the energy mode by open circuit
Select SC to activate the energy mode by close circuit
Select 00 to cancel the energy mode
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