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 mm
2
or 1 x 2.5 mm
2
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 ( S
tandard )
■ 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
www.belimo.com
EXT-HA-8023 • en-ap • 2020-11-10 • subject to changes
1

Belimo EXT-HA-8023 Series Specifications

General

Brand	Belimo
Model	EXT-HA-8023 Series
Category	Thermostat
Language	English

Summary

Basic Features of EXT-HA-8023 Thermostat

LCD Display Information

Technical Specifications

Thermostat Operation

On/Off Control

Turns the thermostat and its output on or off with the power button.

Setting Temperature

Adjusts the target room temperature in 0.5°C increments using dedicated buttons.

Mode Selection

Changes the system's operating mode to cooling, heating, or ventilation.

Fan Speed Selection

Selects fan speed manually (Low, Med, High) or automatically.

Motorized Valve Control

Controls the FCU valve based on temperature difference and auto fan speed.

Advanced Functions

Keyboard Lock Functionality

Automatically locks the keypad after inactivity to prevent unauthorized operation.

Low Temperature Protection

Automatically turns off the fan and valve when room temperature drops below 5°C.

Temperature Adjustment

Allows manual adjustment of temperature settings within a ±5°C range.

Alarm Indicators

Displays error codes (E1, E2) for sensor failures and status (HI, LO) for temperature extremes.

Wiring Diagrams

Installation Guide