UNILUX TA640FCW-ULX HVAC Thermostat User Manual

UNILUX TA640FCW-ULX HVAC Thermostat

Product Information

Specifications

• Product Name: Unilux HVAC Thermostat
• Model: TA640FCW-ULX
• Registration Number: 0033470600
• FCC ID: 2BAPFGEN0UNITA
• IC Certification Number: 30777-GEN0UNITA

Product Usage Instructions

For HVAC Experts

• General Information – Compatibility & Safety Standards
• What’s in the Box: Thermostat (Top & Bottom Housing), Screws x 2, Drywall Anchors x 2, QR Code to Unilux thermostat manual
• Temperature Measurement: Displays heat/cool output and temperature
• Technical Data: Includes power supply, relay contact voltage, relay contact current, sensing element, terminals, operating temperature, storage temperature, operating humidity
• Resolving Warning Symbols: Explains Anti-Freeze Mode, Drain Pan Mode, and Valve output for 2-pipe systems

Installation Steps

• When Installing Direct to Wall
• When Installing in North American Electrical Box
• Wiring Instructions for Fan Coils
• Initial Set Up Instructions
• Pairing Your Mobile Device

For Thermostat Owners

• Thermostat Overview
• Advanced Settings: Includes various settings such as sleep screen layout, system mode, temperature display unit, time display format, etc.

Frequently Asked Questions (FAQ)

1. Can the Unilux HVAC Thermostat be used with other brands of fan coil products?
   No, the Unilux HVAC Thermostat is specifically designed to be compatible with all Unilux fan coil products.

2. How can I access the installation guide and user manual?
   You can scan the QR code included in the box to access the installation guide and user manual online.

3. What do I do if I encounter warning symbols on the thermostat?
   If you see warning symbols such as Anti-Freeze Mode or Drain Pan Mode, refer to the manual for instructions on resolving them based on your system type.

Unilux HVAC Thermostat
This manual covers the installation and operation of the Unilux HVAC Thermostat

User Manual Statement

This device contains licence-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development Canada’s licence-exempt RSS(s). Operation is subject to the following two conditions:

1. This device may not cause interference.
2. This device must accept any interference, including interference that may cause undesired operation of the device.

This Class B digital apparatus complies with Canadian ICES-003.
This equipment complies with Canada radiation exposure limits set forth for uncontrolled environments. This equipment should be installed and operated with a minimum distance of 20cm (may be adjusted according to actual calculation result) between the radiator and your body.

This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.

• Product Name : TA640FCW-ULX
• Registration Number : 0033470600
• FCC ID : 2BAPFGEN0UNITA
• IC Certification Number : 30777-GEN0UNITA

Caution: The user is cautioned that changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

This equipment complies with FCC’s RF radiation exposure limits set forth for an uncontrolled environment. The antenna(s) used for this transmitter must be installed and operated to provide a separation distance of at least 20 cm from all persons and must not be collocated or operating in conjunction with any other antenna or transmitter. Installers must ensure that 20cm separation distance will be maintained between the device and users.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause undesired operation.

Compatibility & Safety Standards

The Unilux HVAC Thermostat is compatible with all Unilux fan coil products. Included in this manual are installation instructions for the following systems:

This thermostat adheres to the following safety standards :

Fan Coils

• 2-Pipe Standard
• 4-Pipe Standard
• 2-Pipe w/Auxiliary Heating
• 2-Pipe w/Aquastat
• 2-Pipe w/Auxiliary Heating & Aquastat

What’s in the Box

1. Thermostat (Top & Bottom Housing)
2. Screws x 2
3. Drywall Anchors x 2
4. QR Code to Unilux thermostat manual

You will also need:

• Screwdriver
• Bubble Level

Temperature Measurement

• Measurable range: 0 – 40 °C / 32 – 99 °F
• Controllable range: 5 – 35 °C / 40 – 95 °F
• Resolution: 0.5°C / 1°F

Embedded thermistor for measuring Room Temperature

• When temperature is below 0°C / 32°F , temperature keeps display LO
• When temperature is above 40°C / 99°F, temperature keeps display HI
• When sensor not connected or shorted thermostat will show “- -“ and heat/cool output will turn OFF

Remote water temperature sensor (for 2-pipe systems only)

• When 2-pipe system is selected (2H or 2P mode), remote water temperature sensor must be present
• When sensor not connected or shorted thermostat will show “E1” and heat/cool outputs will turn OFF

Technical Data

Technical data

1.| Power supply| 24VAC ± 20%
2.| Relay contact voltage| 24VAC 50/60 Hz
3.| Relay contact current| 1A max
4.| Sensing Element| 10K NTC Type 2
5.| Terminals:| 0.75mm2 or 18Ga
5.| Operating Temperature| 32 ~ 122 °F / 0 ~ 50 °C
7.| Storage Temperature| 23 ~ 122 °F / -5 ~ 50 °C
8.| Operating Humidity| 5 ~ 95% R.H. non-condensing

Resolving Warning Symbols

Anti-Freeze Mode
Defrost indicator is shown on the screen when; the room temperature is below 5 °C / 41 °F OR remote water temperature sensor is below 1 °C / 34 °F OR 24VAC trigger signal is ON at FZ terminal. When triggered, fan-speed is set to Low and all water valves open (both W and Y outputs are turned on).

• 2-pipe system:
  Valve output (W) should be On to keep water flowing.

• 4-pipe system:
  Cool output should On and Heat output should On. (Both W and Y outputs should be ON)

Drain Pan Mode
Drain Pan indicator is shown when +24VAC signal is triggered at DP terminal. The fan is forced to OFF and all water valves close (both W and Y outputs are turned OFF).

Operating Mode Functionality

Refer to page 20 for instructions on reaching Operating Mode settings. There are 4 operating modes:

1. Off mode
   Heat/Cool/Fan outputs are always OFF.

2. Heat mode
   Heat turns ON when room temperature is lower than setting temperature.

Heating protocol for all Unilux fan coil models WITHOUT auxiliary heat:

Heating protocol for Unilux fan coil units WITH auxiliary heat:

When call for heat (room temperature below setting temperature) and remote temperature is <29.5°C/85°F:

• Hot water valve does not open (W has no output)
• Auxiliary heat turns ON (Y/A has output)
• Note : there will be a 5 minute delay in the electric heater activating to allow the system to purge.

When call for heat and remote temperature is higher than or equal to 29.5°C/85°F:

• Auxiliary heat does not turn on (Y/A has no output)
• Hot Water Valve opens (W has output)

Cool mode
Cool turns ON when room temperature is higher than setting temperature. Cooling protocol for all Unilux fan coil units:

Auto mode
Output switches ON/OFF according to both heat setpoint and cool setpoint. The heat setpoint and cool setpoint must be separated by a dead band of 2°C / 4°F. While switching Heat/Cool, outputs do not turn ON during a 4 minute minimum switching OFF time. The heat icon will flash on the thermostat while in Heat Mode, and the cool icon flashes while in Cool Mode.

Heat/Cool control for Auto Mode

• 2-pipe fan coil system (with and without Auxiliary heat)
  • Remote water temperature sensor must present for 2-pipe systems
  • Heat control when remote temperature > 29.5°C / 85°F
  • Cool control when remote temperature < 18.5°C / 65°F
• 4-pipe fan coil system
  • Control switches to Heat control when room temperature is lower than Heat setpoint
  • Control switches to Cool control when room temperature is higher than Cool setpoint

Auto protocol for all Unilux fan coil models WITHOUT auxiliary heat:

Auto protocol for Unilux fan coil units WITH auxiliary heat:

Note : there will be a 5 minute delay in the electric heater activating to allow the system to purge.

Fan Speed Selection
Fan speed can be directly adjusted at Home screen.
Press [FAN] button to select fan speed: Low/Med/High/Auto.

If Auto Fan speed is selected:

• If there is no Heat/Cool demand, fan speed keeps at Low
• Fan output depends on the difference between room temperature and setting temperature
• In Auto Fan Speed Mode, there is a minimum 4 minutes switching back and forth (delay) between Fan Speeds

The Unilux Thermostat must be installed by a trained technician. Failure to follow these instructions carefully may result in product damage

Caution: Electrical Hazard
Equipment and wiring can cause electrical shock and equipment damage. Disconnect power before starting installation.

If installing thermostat in standard interior wall, start with step one on this page. If installing into a North American electrical box, skip to page 11.

When Installing Direct to Wall

Gather materials and tools
To install your new thermostat, you will need the following tools:

• Screws and bolts (provided with the thermostat)
• Screwdriver
• Bubble Level

Mount thermostat to wall

• Detach the bottom housing from the thermostat by pulling the two pieces apart.
• Wire the thermostat according to the diagrams found on pages 12 and 13 by passing the wires through the bottom housing, to the top housing terminal block.
• Secure the bottom housing to the desired wall with the provided screws. We recommend using a bubble level to ensure the housing is straight before fully mounting to wall.
• Reattach the top housing to the bottom.

When Installing in North American Electrical Box

1. Check the compatibility of your electrical box
   Before purchasing your new thermostat, it is important to check that the mounting holes for the thermostat will fit your electrical box. If your electrical box is a standard North American electrical box, you may encounter difficulties in installing the thermostat.

2. Gather materials and tools
   To install your new thermostat, you will need the following materials and tools:

   • Steel installation plate
   • Plastic interface plate
   • Screws and bolts (provided with the thermostat)
   • Screwdriver
   • Bubble Level

3. Install the Steel Installation Plate

   • Turn off the power supply to the electrical box by switching off the circuit breaker or removing the fuse.
   • Remove the cover plate from the electrical box.
   • Position the steel installation plate onto the electrical box so that the holes line up with the mounting holes on the electrical box.
   • Secure the steel installation plate to the electrical box using screws and bolts provided with the thermostat.
   • Check that the steel installation plate is level.

4. Install the Plastic Interface Plate and Thermostat

   • Detach the bottom housing from the thermostat by pulling the two pieces apart.
   • Position the plastic interface plate to the steel installation plate by aligning the holes.
   • Wire the thermostat according to the diagrams found on pages 12 and 13 by passing the wires through the steel plate, plastic interface plate, and bottom housing, to the top housing terminal block.
   • Position the bottom housing onto the plastic interface plate and align the mounting holes on the housing with the holes on the steel installation plate.
   • Secure both the plastic interface plate and thermostat to the steel installation plate using provided hardware.
   • Reattach top housing to bottom housing.
   • Turn on the power supply to the electrical box by switching on the circuit breaker or replacing the fuse.

Wiring Instructions for Fan Coils

(A) 2-Pipe Standard

(BAPI 10K-3)

DP| Drain pan
FZ| Freezestat

(B) 4-Pipe Standard

(C) 2-Pipe with Auxiliary Heating

(D) 2-Pipe with Aquastat

(E) 2-Pipe with Auxiliary Heating & Aquastat

Initial Set Up Instructions

There are a few settings that must be configured by the installer before the thermostat is ready for use.

1. Wake Up Thermostat
   Tap [POWER] to wake up the thermostat.

2. Clock and Date setting

   • Press [CLOCK] to start the setting
   • The day of the week will start flashing at the top of the screen
   • Press [▲] / [▼] to change the day of week
   • Press [CLOCK] again to confirm day of week setting and start to adjust hour
   • Press [▲] / [▼] to change the hour
   • Press [CLOCK] again to confirm hour setting and start to adjust minutes
   • Press [▲] / [▼] to change the minutes
   • Press [CLOCK] again to confirm
   • Press [SELECT] to confirm and exit

3. Set System Mode
   The default system mode is set to 0 for a 2-Pipe Standard fan coil. If connecting to another system, complete the following steps:

   • Hold [MENU] to enter Advanced Settings menu
   • Continue pressing [MENU] to cycle through settings until reaching P02 (System Mode)
   • There are four system modes, press [▲] / [▼] to select the required mode based on the chart to the right
   • Press [SELECT] to confirm and exit
     Fan Coil System| Mode
     ---|---
     (A) 2-Pipe Standard| 2P
     (B) 4-Pipe Standard| 4P
     (C) 2-Pipe w/Auxiliary Heating| 2H
     (D) 2-Pipe w/Aquastat| 2A
     (E) 2-Pipe w/Auxiliary Heating & Aquastat| 2A

4. Set Temperature Display
   The default temperature display is set to °C. If in the US, do the following to set to °F.

   • Hold [MENU] to enter Advanced Settings menu
   • Continue pressing [MENU] to cycle through settings until reaching P03 (Temperature Display)
   • Press [▲] / [▼] to select either Fahrenheit or Celsius
   • Press [SELECT] to confirm and exit

Pairing Your Mobile Device

Control your thermostat from anywhere, anytime.
The Unilux Thermostat App is the easiest way to control your thermostat wherever you are.

We take your privacy seriously. Visit uniluxhvac.com to find out how we protect your data.
Easily pair your Unilux Thermostat to your mobile device following the in-app instructions.

Thermostat Overview

Navigation Keys

1. Mode/Menu
   Quick change from cooling to heating. Hold to cycle through the Advanced Settings menu. See page 15 for Advanced Settings.

2. Clock
   Sets the current date and time shown on the home screen and sets programs (schedules). See page 16 for instructions on programs.

3. Power/Fan Speed/Select
   Wakes up or powers down your thermostat, toggles the fan speed, and functions as the selection key.

4. Scroll Keys

Battery Backup
In the event of a power outage, all settings (except for home screen layout and sleep countdown) and program schedules are saved in your thermostat memory. During the outage, the backup battery will last up to one hour with the back-light dimmed. Your Wi-Fi will need to be reconnected to your thermostat once power resumes.

Advanced Settings

P00 – Sleep Screen Layout
Your thermostat is equipped with four screen layouts to choose from, based on the information you’d like to see while your thermostat is asleep. Your default home screen is option “0”.

To select a new layout

• Hold [MENU] to enter the Advance Settings menu
• Press [▲] / [▼] to cycle through your three layout options
• Press [SELECT] to confirm your screen selection and exit the Advanced Settings menu

P01 – Sleep Countdown
Your thermostat screen will automatically enter sleep mode to conserve energy after 20 seconds following usage. You can adjust this countdown anywhere between 0-120 seconds.

To change sleep countdown:

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P01
• Press [▲] / [▼] to increase/decrease the countdown
• Press [SELECT] to confirm and exit the Advanced Settings menu

P02 – System Mode

This setting should only be modified by an HVAC technician. Improper selection of the system mode will cause your thermostat to not function.

The system mode refers to the type of fan coil system your thermostat is connected to. See the initial set up guide on page 12 for instructions on selecting the system mode.

P03 – Temperature Display Unit
The temperature unit of your thermostat should be set to your region’s standard measurement during installation.

To adjust your temperature display unit

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P03
• Press [▲] / [▼] to choose between °C or °F
• Press [SELECT] to confirm and exit the Advanced Settings menu

P04 – Time Display Format
By default, your thermostat uses a 12-hour clock. If preferred, you can set your thermostat to a 24-hour clock instead.

To toggle your clock format

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P04
• Press [▲] / [▼] to choose between 12 or 24
• Press [SELECT] to confirm and exit the Advanced Settings menu.

P05 – Temperature Offset
If your thermostat is in an area of your suite that is colder or warmer than the rest of your home, you can offset the thermostat’s temperature reading to compensate. Before you adjust this setting, you will need a thermometer (inexpensive options can be found in any hardware store) to measure the temperature near your thermostat, and again in a room that feels similar to the rest of your suite. The difference in temperature is what you need to offset your thermostat at. Your thermostat can be offset +/- 5 °C or 10 °F.

To offset your thermostat temperature

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P05
• Press [▲] / [▼] to offset your temperature
• Press [SELECT] to confirm and exit the Advanced Settings menu

P06 – Switchi ng Differential – Heat Mode
The switching differential while in heat mode refers to the delay in call for heating. We recommend keeping your thermostat at the default 2 °C (4 °F) setting, however you can adjust the differential between 2-4 °C (4-8 °F) if desired.
To change your switching differential while in heat mode:

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P06
• Press [▲] / [▼] to adjust your setting
• Press [SELECT] to confirm and exit the Advanced Settings menu

P07 – Switching Differential – Cool Mode
The switching differential while in cool mode refers to the delay in call for cooling. We recommend keeping your thermostat at the default 2 °C (4 °F) setting, however you can adjust the differential between 2-4 °C (4-8 °F) if desired.

To change your switching differential while in cool mode:

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P07
• Press [▲] / [▼] to adjust your setting
• Press [SELECT] to confirm and exit the Advanced Settings menu

P08 – Program Mode
To save energy and live comfortably, your thermostat allows you to program up to four scheduled temperatures in each day. There are three types of programs available:

• 7-Day Program – set a unique schedule for each day of the week
• 1-Day Program – set one schedule that is used every day of the week
• 5+1+1Day Program: set one schedule for all weekdays with unique schedules for Saturday and Sunday

The default program on your thermostat is set to a 7-Day Program. If you would like to use this program, skip to part B of the following instructions.
If you would like to use a different program mode, continue to part A.
To set a program: A)

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P08
• Press [▲] / [▼] to cycle through the following options:

• Press [SELECT] to confirm and exit the Advanced Settings menu
• Hold [CLOCK] until your thermostat enters program mode. Depending on the type of program selected in part A, you will either see:

7 or 5+1+1 Day Program:

• Press [▲] / [▼] to navigate to the desired day
• Press [CLOCK] to confirm the day
• Set Schedule 1 by pressing [▲] / [▼] to select the houryou want the schedule to start

Note: you can see which program out of four you are scheduling for the indicated day with this icon:

• Press [CLOCK] to confirm
• Press [▲] / [▼] to select the minute you want the schedule to start
• Press [CLOCK] to confirm
• Press [▲] / [▼] to select the temperature you want at the chosen time
• Press [CLOCK] to confirm
• Schedule 1 is now set, and you are ready to repeat these steps to set Schedules 2-4 for your selected day.

After you have set all four schedules, you will be prompted to repeat this process for the next day(s).

1-Day Program :

Set Schedule 1 by pressing [▲] / [▼] to select the hour you want the schedule to start

Note: you can see which program out of four you are scheduling for with this icon:

• Press [CLOCK] to confirm
• Press [▲] / [▼] to select the minute you want the schedule to start
• Press [CLOCK] to confirm
• Press [▲] / [▼] to select the temperature you want at the chosen time
• Press [CLOCK] to confirm
• Schedule 1 is now set, and you are ready to repeat these steps to set Schedules 2-4.

After you have set all four schedules, you will be returned to the home screen.
You may override your scheduled program at anytime, either temporarily or permanently.

To set a temporary hold on your program

• From the home screen, press [▲] / [▼] to override the temperature setpoint
• The “Program” icon on your thermostat will disappear

Your temporary hold will remain until it is time for your next scheduled program which will resume as normal

To set a permanent hold on your program:

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P08
• Press [▲] / [▼]until you reach mode noP for No Program
• The permanent hold icon will appear on your screen
• Press [SELECT] to confirm and exit the Advanced Settings menu

Your permanent hold will indefinitely maintain a consistent temperature in your suite.

P09 – Vacation Hold
If you have a program set but are going away, you can set a Vacation Hold to pause your programs for up to 99 days.
To set a vacation hold:

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P09
• Press [▲] / [▼] to select the number of days you want the hold to take place
• Press [SELECT] to confirm and exit the Advanced Settings menu
• Set the desired temperature from your home screen to be held for the duration of your vacation

P10 – Temperature/Humidity Reading
Your thermostat can display either the temperature of your room, or the humidity levels. By default it reads the Temperature(t).

To adjust thermostat reading:

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P10
• Press [▲] / [▼] to toggle between H and t
• Press [SELECT] to confirm and exit the Advanced Settings menu

P15 – Operating Mode
Your thermostat operates in four standard modes: Heat, Cool, Auto, and Off. See page 5 for full functionality details. You can press the [MENU]/[MODE] button to quick change between heating and cooling, or you can do the following to access all operating modes:

• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P15
• Press [▲] / [▼] to switch between modes
• Press [SELECT] to confirm and exit the Advanced Settings menu

P16 – Heating Changeover Temperature (Auto Mode)
The Auto mode of your thermostat works according to both a set heating and cooling temperature. When your suite temperature drops to the designated changeover temperature, your thermostat triggers your heat to turn on. By default, your heating changeover temperature is 18 °C (64 °F) but can range between 10 – 25 °C (50-77 °F).

To adjust your heating changeover temperature:

• Ensure your thermostat is in auto mode
• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P16
• Press [▲] / [▼] to set your desired changeover temperature
• Press [SELECT] to confirm and exit the Advanced Settings menu

Note : Your heating changeover temperature must be at least 2 °C (4 °F) away from your cooling changeover temperature.

P17 – Cooling Changeover Temperature (Auto Mode)
The Auto mode of your thermostat works according to both a set heating and cooling temperature. When your suite temperature rises to the designated changeover temperature, your thermostat triggers your cooling to turn on. By default, your cooling changeover temperature is 23 °C (73 °F) but can range between 20 – 40 °C (68-104 °F).

To adjust your cooling changeover temperature:

• Ensure your thermostat is in auto mode
• Hold [MENU] to enter the Advance Settings menu
• Continue pressing [MENU] until reaching P17
• Press [▲] / [▼] to set your desired changeover temperature
• Press [SELECT] to confirm and exit the Advanced Settings menu

Note : Your cooling changeover temperature must be at least 2 °C (4 °F) away from your heating changeover temperature.

P19 / P20 – Wi-Fi & Mobile Reset
If you need to reconnect your thermostat to your Wi-Fi network, or are a new suite owner trying to override a previous owner’s access, you can follow these steps.

To disconnect from your Wi-Fi:

1. Hold the [MENU] and [SELECT] buttons until P19 appears at the top of your screen
2. Press [▲] / [▼] to select “YES”
3. Press [SELECT] to confirm
4. Press [MENU} until P20 appears
5. Press [▲] / [▼] to select “YES”
6. Press [SELECT] to confirm and return to home screen

To pair with an IOS device:

1. Make sure your device is connected to a Wi-Fi network.

2. Access Advanced Settings

   • Press and hold the [MENU] and [SELECT] buttons simultaneously to access the Advanced Settings.

3. Determine if Your Thermostat is in Pairing Mode

   • In Advanced Settings, press [MENU] to cycle through the pages.
   • If your thermostat does not have a page titled “P21,” it is already in pairing mode and you can skip to Step 4.
   • If your thermostat does have a page titled “P21,” you must proceed to Step 3 to activate pairing mode.

4. Activate Pairing Mode

   • In P21 of Advanced Settings, press the [UP] or
     [DOWN] button until the on-screen text says “PAR APP” as above. Press [SELECT] and pairing mode will be activated.

5. Find the Device ID

   • In Advanced Settings, press the [MENU] button to cycle through the pages until you reach a page titled “ADR.” This page will display a five-digit alphanumeric code which is your device ID. Input this ID with your Wi-Fi info to connect to your thermostat.

To pair with an Android device:

1. Make sure your device is connected to a Wi-Fi network.

2. Access Advanced Settings

   • Press and hold the [MENU] and [SELECT] buttons simultaneously to access the Advanced Settings.

3. Determine if Your Thermostat is in Pairing Mode

   • In Advanced Settings, press [MENU] to cycle through the pages.
   • If your thermostat does not have a page titled “P21,” it is already in pairing mode and you can skip to Step 4.
   • If your thermostat does have a page titled “P21,” you must proceed to Step 3 to activate pairing mode.

4. Activate Pairing Mode

   • In P21 of Advanced Settings, press the [UP] or
     [DOWN] button until the on-screen text says “PAR APP” as above. Press [SELECT] and pairing mode will be activated.

5. Find the Device ID

   • In Advanced Settings, press the [MENU] button to cycle through the pages until you reach a page titled “ADR.” This page will display a five-digit alphanumeric code which is your device ID. Input this ID with your Wi-Fi info to connect to your thermostat.

Note: To perform a full factory reset of your thermostat, turn the breaker switch connected to your fan coil off and back on. After a factory reset, you must follow the set up steps installation guide for your thermostat to function.

Warning Symbols

Anti-Freeze Mode
The defrost indicator is triggered under conditions when your unit senses low temperatures and automatically works to conserve operating temperatures.

No action required.

Error Code 1
When water temperature sensor is not connected or if it has shorted, your thermostat will show “E1” and heat/cool outputs will turn OFF.
Please contact your HVAC service provider.

Drain Pan Mode
The water droplet indicator is triggered when your drain pan is close to overflowing. Your HVAC unit will stop operating until serviced.

Please contact your HVAC service provider.

October 24, 2023

References

• Heating, Cooling & Ventilation in High-Rise Buildings | Unilux HVAC

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