Belimo EXT-HA-8023 Series User manual

EXT-HA-8023 Series Touch Pad fan coil unit thermostats are designed to control
the room temperature in air-conditioning fan coil unit system or dust pipe channel
system. EXT-HA-8023 series thermostats with microprocessor and big LCD display. It
shows the following items: working status (cool, heat or ventilation), fan speed,
room temperature, set-point temperature etc. Keys include on/off ( ),mode
( ),fan speed ( ) and temperature adjustment (   ).
BASIC FEATURES LCD Display
■Room temperature setting
■Manual or auto 3-speed changeover
■Defrost (low temperature protection)
■Blue back light
■Key lock ( Optional )
■Auto-restart
■Working Status: Cooling , Heating or Ventilation
■Fan Speed（Low 、Med 、High or AUTO）
■FCU valve status
■Room temperature display
■Temperature setting display
SPECIFICATIONS
■Sensing element: NTC
 1℃
■Set-point range: 5 to 35℃℃
■Display range: 0～55℃
■Operation environment: 0～45℃
■Operating Humidity: 5 ～ 90%RH
(non-condensing)
■Power supply: AC 85～260V, 50/60Hz
■Wirings: Accepting 2 × 1.5 mm2 or 1 x 2.5 mm2 wires
■Switch current rating: Resistive: 2 A, Inductive: 1 A
■Housing: PC + ABS Fire Retardant
■Dimensions: 90×88×15.5 mm ( W × H × D )
■Hole pitch: 60 mm ( Standard )
■Protection Class: IP30
■Rated Power: < 1W
■Accuracy:
■Key: Soft touch
OPERATION
■On/Off: Press “ ” to turn on, press “ ” again to turn off thermostat and its output.
■Setting temperature: Press “” to reduce set-point, press “” to raise set-point, and 0.5℃ changed once.
■Mode Selection: Press “ ” to change system working in cooling “ ”, heating “ ” or ventilation “ ” mode, the
related icon will flash
■Fan Speed Selection: Press “ ” to change fan speed among “ (Hi)”, “ (Med)”, “ (Low)” or “AUTO
(Auto)”.
Under auto fan speed “AUTO”, the fan-speed will be changed automatically. Auto LOW-speed When the difference
between room-temperature and set-point is 1℃; Auto MED-speed When difference is 2℃; Auto Hi-speed When
difference is 3℃.
■Control Motorized Valve: If the differential temperature between room temperature and set-point exceed 1℃, FCU
valve will be open; if room temperature and set-point are equal, EXT-HA-8023 will close the FCU valve with
the fan still running.
EXT-HA-8023 Series
Thermostat
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Keyboard Lock Function
■Keypad Lock: its keypad would be automatically locked in 30 seconds in case that no one uses the thermostat, so as
to prohibit other persons from operating the thermostat.
■Keypad Unlock：Press“ ”for 5 seconds to unlock（In case that no one uses the thermostat, its keypad would be
automatically locked in 30 seconds）.
Low Temperature Protection Function
■Turn off: When the room temperature is lower than 5℃, the thermostat would automatically turn on the fan and
valve with “ ” showing, When the room temperature reaches to 7 , the thermostat wil℃l automatically close the output.
Low Temperature Protection Setting
■Turn off the thermostat, press” ” and hold for 3 seconds, it will display “OF” or “ON”, press “▲” or “▼” key to adjust.
“OF” indicates low temperature protection invalid, “ON” indicates low temperature protection function valid. The
default is “OF”.
Temperature Adjustment
■Temperature adjustment (±5℃) can be done by following step:
■Turn off the thermostat, press“▲”and “▼”hold for 3 seconds, it will display “XX ℃”（not displaying the thermostat
model）, press “▲”or “▼” to adjust the temperature value, it will be automatically confirmed after 6 second.
Alarm
■Once the sensor fails, the thermostat will close the fan and valve, displaying “E1” or “E2”.
E1：Sensor in short circuit alarm
E2：Sensor in open circuit alarm。
It is displaying “HI” when the temperature is higher than 55℃, displaying “LO” when the temperature is lower
than 0℃.
WIRING DIAGRAMS
Low
EXT-HA-8023
L
N
VO
Med Fan
Valve
VC
AC85～260V 50/60Hz
N L
Hi
www.belimo.com EXT-HA-8023 • en-ap • 2020-11-10 • subject to changes 2

INSTALLATION
Note: Be sure to connect all the wires as per the wiring diagrams and keep it away from water,
mud and other material so as to prevent the unit being spoiled!
3.Remove the cables from
the control board
4 . As per wiring diagram,
connect it with terminals,
1.Put 3.5mm width
screwdriver into the slot.
2.Open the face
cover.
8. Press down the both
down sides to fix the
cover and finish the
installation
7. Firstly hang up the two
hooks with 30 degree
angle
5. Fix the installation
backboard with two
bolts on the wall.
6. Connect the cables on
the control board
www.belimo.com EXT-HA-8023 • en-ap • 2020-11-10 • subject to changes 3