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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"
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
Low Temperature Protection Setting
■
Turn off the thermostat, press"
"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
EXT-HA-8023
www.belimo.com
"for 5 seconds to unlock（In case that no one uses the thermostat, its keypad would be
" and hold for 3 seconds, it will display "OF" or "ON", press "▲" or " ▼ " key to adjust.
AC85～260V 50/60Hz
N L
L
VC
Valve
VO
Low
Med
Fan
Hi
N
EXT-HA-8023 • en-ap • 2020-11-10 • subject to changes
l automatically close the output.
℃
2
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