HaiLin Controls
Beijing HaiLin Auto Controls Equipment Co., Ltd. Page 2 of 3 Tel: +86 10 52816666
International Information Industry Basement, HuilongguanNorth, Changping District, Beijing www.hailin.com
OPERATION
"On/Off: Press “ ” to turn on, press “ ” again to turn off thermostat and its output.
"Setting temperature: Press “T” to reduce set-point, press “S” to raise set-point, and 1 changed once.℃
"Mode Selection: Press “ ” to change system working in cooling “ ”, heating “ ” or ventilation “ ” mode, the
related icon will flash ( The ventilation function is invalid for HL2023Y/YE)
"Fan Speed Selection not for HL2023Y: 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-Damper (HL2023Y/YE): Under cooling (heating) mode, The damper will be open when the
room temperature is 1℃higher than set-point in cooling, or room temperature is 1℃lower than set-point in heating,
Otherwise the damper will be closed.
"Control Motorized Valve under 2-pipe configuration (not for HL2023Y/YE): 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,
HL2023DA/DAE/DA2/DA2E will close the FCU valve with the fan still running, HL2023DB/DBE/DB2/DB2E will close both
of valve and Fan.
"Control FCU Valve under 4-pipe configuration (HL2023FCV2/FCV2E): In cooling, when the room temperature is
higher than set-point, the cooling Valve will be opened. Otherwise it will be closed. Heating valve is always closed. In
heating, When the room temperature is lower than set-point, the heating valve will be opened. Otherwise it will be closed.
Cooling valve is always closed.
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 w℃ill 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.
