Hailin HL2023 Touch Pad Fan Coil Thermostat
HL2023 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. HL2023 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( M), fan speed (
), and temperature adjustment ( 
).
MODEL DESCRIPTION
HL2023
- Y: Control damper to open or close
- DA/DA2:DA: Control 2-wire valve; DA2: Control 3-wire valve, When the temperature reaches the set-point, it will close the valve with the fan still running.
- DB/DB2: DB: Control 2-wire valve; DB2: Control 3-wire valve, When the temperature reaches the set-point, it will close both the valve and fan.
- FCV2: Control 4 pipe fan coil units, Control heating and cooling valves, and 3-speed fan, when the temperature reaches the set-point, it will close the valves with the fan still running
- L: white backlight. Blank is invalid.
- E: auto-restart (Restart the working status of the last 6 seconds before power off). Blank is invalid.
BASIC FEATURES
- Room temperature setting
- Manual or auto 3-speed changeover
- Defrost (low-temperature protection)
- White backlight ( -L, Optional )
- Key lock ( Optional )
- Auto-restart ( Optional )
LCD Display
- Working Status: Cooling
, or Ventilation
- Fan
、Med
、High
or AUTO） - FCU valve status
- Room temperature display
- Temperature setting display
SPECIFICATIONS
- Sensing element: NTC
- Accuracy: 1℃
- Set-point range: 5℃ to 35℃
- Display range: 0～55℃
- Operation environment: 0～45℃
- Operating Humidity: 5 ～ 90%RH (non-condensing)
- Key: soft touch
- Power supply: AC 85～260V, 50/60Hz
- Wirings: Accepting 2 × 1.5 mm2 or 1 x 2.5mm2 wires
- Switch current rating: Resistive: 2 A, Inductive: 1 A
- Housing: PC + ABS Fire Retardant
- Dimensions: 86.6×86.6×15.5 mm ( W × H × D )
- Hole pitch: 60 mm ( Standard )
- Protection Class: IP30
- Rated Power: 1W
OPERATION
- On/Off: Press ” to turn on, and press” again to turn off a thermostat and its output.
- Setting temperature: Press “0” to reduce the set-point, press “” to raise the set-point, and 0.5℃ changed once.
- Mode Selection: Press “ M” to change the system working in cooling heating ” or ventilation ” mode, and 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 the difference is 2℃; Auto Hi-speed When the 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 a set point in cooling, or the 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 the set-point, the cooling Valve will be opened. Otherwise, it will be closed. The 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 ”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 will automatically close the output.
Low-Temperature Protection Setting
- Turn off the thermostat, ” and hold for 3 seconds, it will display “OF” or “ON”, press “▲the” or “▼” keys to adjust. “OF” indicates low-temperature protection invalid, and “ON” indicates low-temperature protection function valid. The default is “OF”.
Temperature Adjustment
Temperature adjustment (±5℃) can be done by the 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：
The 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
INSTALLATION
REFERENCE:
DOWNLOAD MANUALS:
Hailin HL2023 Touch Pad Fan Coil Thermostat User Manual
