HaiLin Controls HL2023DA User Manual

Page
1
of 3
.
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
HL2023 -
HL2023 Series Thermostat User Manual
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( ),fan speed ( ) and temperature
adjustment (   ).
MODEL DESCRIPTION
L： white backlight. Blank is invalid.
E： auto-restart (Restart the working status of
last 6 seconds before power off). Blank is
invalid.
BASIC FEATURES LCD Display

Room temperature setting

Manual or auto 3-speed changeover

Defrost (low temperature protection)

White backlight ( -L, Optional )

Key lock ( Optional )

Auto-restart ( Optional )

Working Status: Cooling , or Ventilation

Fan 、M ed 、 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 mm
2
or 1 x 2.5mm
2
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

HaiLin Controls HL2023DA Specifications

General

Brand	HaiLin Controls
Model	HL2023DA
Category	Thermostat
Language	English

Summary

Model Description

Damper Control

Controls the damper to open or close based on system requirements.

2-Wire/3-Wire Valve Control

Manages 2-wire or 3-wire valves, closing them when the set-point is reached.

2-Wire/3-Wire Valve and Fan Control

Controls 2-wire or 3-wire valves and fan, shutting off both at set-point.

4-Pipe Fan Coil Unit Control

Controls heating/cooling valves and 3-speed fan for 4-pipe FCU systems.

Basic Features and Display

Room Temperature Setting

Allows manual adjustment of the desired room temperature.

Fan Speed Control

Enables manual or automatic selection of 3 fan speeds.

Low Temperature Protection

Protects the unit from damage at low ambient temperatures.

Optional Features

Includes white backlight, key lock, and auto-restart functionalities.

LCD Display Indicators

Shows backlight status, auto-restart status, working mode, and fan speed.

Room and Set-Point Display

Displays current room temperature and the target temperature setting.

Specifications

Sensing and Accuracy

Specifies NTC sensing element and ±1°C accuracy.

Temperature Ranges

Defines set-point range (5°C-35°C) and display range (0°C-55°C).

Operating Environment

Details operating temperature (0-45°C) and humidity (5-90% RH).

Power and Wiring

Specifies power supply (AC 85-260V) and wire compatibility.

Electrical Ratings

Lists switch current ratings for resistive and inductive loads.

Physical and Protection Specs

Includes housing material, dimensions, hole pitch, and protection class.

Rated Power

Indicates the maximum power consumption of the device.

Operation and Functions

Thermostat On/Off

Procedure to turn the thermostat and its output on or off.

Temperature and Mode Settings

How to adjust set-point temperature and select operating modes.

Fan Speed Adjustment

Methods for changing fan speed manually or automatically.

Automatic Fan Control

Details on how fan speed automatically adjusts based on temperature difference.

Valve and Damper Operation

Describes control logic for motorized valves and dampers in different systems.

Keyboard Lock

Explains automatic keypad locking and manual unlocking procedures.

Low Temperature Protection

Functionality and setting for protecting the unit at low temperatures.

Temperature Adjustment Method

Procedure to adjust temperature by ±5°C after turning off the device.

Alarms and Wiring

Alarm Indicators

Describes E1/E2 alarms for sensor faults and HI/LO for temperature extremes.

Wiring Diagrams

Provides wiring diagrams for different HL2023 models.

Installation Guide

Step-by-Step Installation

Illustrated guide for mounting the thermostat and connecting wires.

Wiring and Protection Note

Important note on connecting wires correctly and protecting from elements.