Unilux HVAC User manual

Installation Guide | 1
Unilux HVAC
Universal Thermostat
This manual covers the installation of the
Unilux Universal thermostat
HVAC Industries Inc.

2 | Installation guide2 | Installation guide
• Compatible with all Unilux residential HVAC
equipment
• 92mm x 92mm
• LCD display with 5 touch sensitive buttons
Displays:
• Operating temperature: 32 ~ 122 °F / 0 ~ 50 °C
• Resolution: 1°F / 0.5°C
• Temperature: °F / °C
• Voltage supply: 24VAC
• Mode: Heat/Cool/Auto/Off
• Fan: Low/Med/High/Auto
• Terminal to connect remote water temperature
sensor
• Connection terminals: C, R, Y/A, G1, G2, G3, W,
DP, FZ, TH, GND
• 12-hour / 24-hour format clock display
• Permanent hold, Temporary hold/ Schedule
and vacation
• LCD Backlight
• Set point, program settings and date and time
settings are stored in memory even power down
• Temperature calibration: -5 °C ~ +5 °C
• Terminals: 2 mm2 cable
• Drain pan and Freezestat detection
• Surface mounting installation
Universal thermostat must be installed by a trained technician.
Failure to follow these instrutions carefully may result in product
damage
Caution: Electrical Hazard
Equipment and wiring can cause electrical
shock and equipment damage.
Disconnect power before starting installation
1. Remove the content from the box.
2. Detach the bottom housing from the
thermostat by pulling the two pieces apart.
Universal Thermostat Requirements
Mount the Thermostat

Installation Guide | 3
3. Level the bottom housing on the wall, bubble
level recommended.
4. Secure the bottom housing to the walls with the
provided screws.
5. With the bottom housing firmily mounted on the
wall, connect the wiring from the top housing to
the slot on the bottom housing.
6. After connecting the wiring, mount the top
housing on to the bottom housing, make sure to
check if it's properly placed.

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Electrical Interface
Symbols Terminals
R 24VAC Hot
C 24VAC Common
Wnot connected
Y/W Heat/Cool valve relay
G1,G2,G3 Low, Med, High fan relays
TH, GND Remote 10kΩ water temperature sensor
(BAPI 10K-3)
DP Drain pan
FZ Freezestat
Symbols Terminals
R 24VAC Hot
C 24VAC Common
W Heat valve relay
Y/A Cool valve relay
G1,G2,G3 Low, Med, High fan relays
TH, GND not connected
DP Drain pan
FZ Freezestat
Symbols Terminals
R 24VAC Hot
C 24VAC Common
W Auxiliary heater relay
Y/A Heat/Cool valve relay
G1,G2,G3 Low, Med, High fan relays
TH, GND Remote 10kΩ water temperature sensor
(BAPI 10K-3)
DP Drain pan
FZ Freezestat
(A) 2-pipe system
(B) 4-pipe system
(C) 2-pipe with Auxiliary heat system

Installation Guide | 5
User Interface
Symbols Terminals
R 24VAC Hot
C 24VAC Common
W Connects to Heat relay of aquastat
Y Connects to Cool relay of aquastat
G1,G2,G3 Low, Med, High fan relays
TH, GND not connected
DP Drain pan
FZ Freezestat
Symbols Terminals
R 24VAC Hot
C 24VAC Common
W Connects to Heat/Cool of aquastat
Y Connects to Cool valve relay
G1,G2,G3 Low, Med, High fan relays
TH, GND not connected
DP Drain pan
FZ Freezestat
(D) Alternate Method 1
2-pipe – AQUASTAT VERSION
(E) Alternate Method 2
2-pipe (Aux. Heat) – AQUASTAT VERSION
Mode / Menu
Accessing clock
Select Fan Speed/ Turn OFF System
Adjust settings
a multi functional key, to control the mode the thermostat is
running in (heat, cool, auto) and access intstaller settings.

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Home Screen
At Home screen, LCD displays time, room
temperature, fan speed, heat/cool output status
icons.
LCD backlight stays on for 3 seconds after key
presses.
Clock and Date setting
• Press [CLOCK] to start the setting
• 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 minutes setting
and start to adjust day of week
• Press [middle key] to confirm and exit. Or it will
automatically exit in 20 seconds
Anti-Freeze mode
When the room temperature is below 40 °F / 5 °C or
remote water temperature sensor is below 34 °F /
1 °C, or 24VAC trigger signal is ON at FZ, fan-speed
is to Low and All Water valves open (Both W and
Y outputs are turned on). “ ”defrost indicator is
shown on the screen.
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
When +24VAC signal is triggered at DP terminal then
Fan forces to OFF and All Water valves Close (Both W
and Y outputs are turned OFF).
“Water droplet” indicator is visible on the screen.
Until the unit is ready for use again. Please contact
your HVAC service provider

Installation Guide | 7
# Items Values Default
P00 User Interface Screen Saver 0 ~ 3(^) 0
P01 Screen Saver Countdown 0 ~120(^) 20
P02 System Mode 2 Pipe (0) / 4 pipe (1) / 2A (2) / 2H (3) 0
P03 Temperature Display Unit °C / °F °C
P04 Time Display format 12 / 24 12
P05 Temperature Offset -5°C ~ 5°C / -10°F ~ 10°F 0°C
P06 Switching Differential in
Heat mode
2 ~ 4°C
4 ~ 8°F
2°C
P07 Switching Differential in
Cool mode
2 ~ 4°C
4 ~ 8°F
2°C
P08 Program Mode No program (0) / 1day program (1) / 5+1+1 program (2) / 7day program (3) 3
P09 Vacation Hold 0 ~ 99 0
P14 Forced Ventilation Disable / Enable Disable
P15 Operating Mode Heat / Cool / Auto Heat
P16 Changeover temperature for
Heat mode
10 - 25 18°C
P17 Changeover temperature for
Cool mode
20 – 40C
Must have a minimum 2 degree spread
23°C
Turning the Thermostat On/Off
Press-n-Hold [On/Off Key] to turn On / Off the thermostat.
When the thermostat is Off. No Output will be generated.
Internal Parameter Setting
• Press-n-hold on key
• Press to advance to the next item
• Press [▲] / [▼] to adjust the value
• Press [center key] to confirm and exit
(^) P00 and P01 stored in RAM. Restored to default after a power surge

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System mode
Refer to Internal Parameter Setting section for
accessing Internal Parameter Menu.
There are 4 system 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
• 2-pipe system (2P/ 2H)
4-pipe system (4P)
2-pipe – Aquastat version (2A)
• 2-pipe with Auxiliary heat system (2H)
• 2-pipe with Auxiliary heat – Aquastat
version
When call for heat (room temperature below
setting temperature) and remote temperature is
< 85°F/29.5°C
- Hot water valve does not open (W has no
output)
- Auxiliary heat turns on (Y/A has output)
• Auxiliary heat does not turn on (Y/A has
no output) when remote temperature is
higher than or equal to 85°F/29.5°C and
Water Valve opens (W has output)
3. Cool mode
• Cool turns On when room temperature is
higher than setting temperature
4. Auto mode
• Output turns on On/Off according to both
heat setpoint and cool setpoint
• Heat setpoint and Cool setpoint must be
separated by a dead band of 4°F / 2°C
• There is a 4 minutes Heat/Cool switching
minimum off time
• Heat and Cool outputs do not turn On
during Heat/Cool switching minimum off
time
• Heat icon flashes when Heat control; Cool
icon flashes when Cool control
• Heat/Cool control for Auto mode
• 2-pipe system (with and without Auxiliary
heat)
- Remote water temperature sensor must
present for 2-pipe systems
- Heat control when remote temperature >
85°F / 29.5°C
- Cool control when remote temperature <
65°F / 18.5°C
• 4-pipe 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
• 2-pipe / 4-pipe system
• 2-pipe with Auxiliary heat system
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

Installation Guide | 9
2. Permanent Hold
• To switch back from vacation hold, set a
permanent hold when users return
• Access Internal Parameter Menu. Go to P08.
• Press [▲]/[▼] until you see “noP”
• Press [center key] to activate Permanent Hold
i.e. No-prg (No Program) and return to Home
screen
• The “P” symbol is visible on the screen
• Permanent Hold maintains a consistent
temperature at all hours of the day
Vacation Hold and Permanent Hold
1. Vacation Hold
• Set Vacation Hold when users are away on
vacation to save energy.
• Access Internal Parameter Menu. Go to P09.
• Press [▲]/[▼] to adjust Vacation Hold duration,
from 1 ~ 99 days.
• “0” to disable Vacation Hold.
• Press [center key] to confirm and return to
Home screen.
• The person-outside-the-house icon appears on
the screen
• Thermostat resumes to Permanent Hold i.e. No-
Prg (No Program)
• When the vacation is over, thermostat will
return to normal programming
3. Temporary Override
• At any time during a scheduled program, e.g. 7-day program / 5+1+1 program / 1-day program, users
may interrupt the schedule by simply pressing [▲]/[▼] to override the preset temperature setpoint
• The house symbol disappears. Schedule is temporarily disabled.
• Icon “T” appears. Temporary Override mode.
• Scheduled program resumes at the next cycle

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Battery backup
When 24VAC power supply is down, all settings and
program schedules are saved in memory. TA640FC-
ULX has built-in super-cap to provide temporary
power backup and keep the clock running for 1 hour
(max).
During power outage, LCD shows time and day of
week, backlight dimmed, Wi-Fi disconnected.
Advanced settings
The following setting can be adjusted on TA640FC-ULX:
• 2-pipe / 4-pipe / 2-pipe with Auxiliary heat selection
1. Refer to Internal Parameter Setting section
• User temperature calibration
1. TA640FC-ULX supports a temperature offset range of ±10°F / ±5°C
Wi-Fi : 2.4GHz | 802.11b/g/n | Interop with Universe Cloud
(^) Temporary Override displayed

Installation Guide | 11
• Measurable range: 32 – 99 °F / 0 – 40 °C
• Controllable range: 40 – 95 °F / 5 – 35 °C
• Resolution: 1°F / 0.5°C
• Temperature display: °F / °C
Embedded thermistor for measuring
Room Temperature
• When temperature is below 32°F / 0°C,
temperature keeps display LO
• When temperature is above 99°F / 40°C,
temperature keeps display HI
• Sensor open/short will show “- -“
• Heat and Cool output will be off when sensor
open/short
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
• LCD flashes error code “E1” under the following
condition –
• Sensor not connected or shorted
• When “E1” is flashing on the display, all outputs
are disabled
Temperature Measurement
Technical data
1. Power supply 24VAC ± 20%
2. Relay contact voltage 24VAC 50/60 Hz
3. Relay contact current 2(1)A max
4. Sensing Element 103AT
5. Terminals: 2 mm2 cable
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

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Universal Thermostat WiFi Setup Guide
Step by step walkthrough of setting up Wi-Fi on Android
1. Download the Avan-Stats from Playstore
Create an account for first-time users.
2. Press the + key in the top right corner to add
new device.
3. Enter SSID and password of your Wi-Fi access
point. Press Connect.
4. For first-time users: grant permission to the
thermostat.

Installation Guide | 13
5. Select the ID of the thermostat i.e. AvanStat-
CED80.
6. While waiting, make sure the thermostat and
your phone are within reach of the nearest Wi-Fi
access point.
7. When thermostat is connected, it is
automatically listed on the device page.
(*) “Last-seen” /
Time Zone
Swipe Right on the
device listing page.
(**) Reset password.
In the unfortunate
event that you lost
it, use the “forget
password” function
and follow the
instruction.
From the dashboard right swipe to get to
this menu.
From the login page after installing the
AvanStat app.

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Step by step walkthrough of setting up Wi-Fi on IOS
1. Download the Avan-Stats from the App Store
Create an account for first-time users.
2. Press the + key in the top right corner to add
new device.
3. Enter SSID and password of your Wi-Fi access
point. Press Connect.
4. Press Join to pair iPhone to the thermostat.

Installation Guide | 15
5. For first-time users: Grant Permission to the
thermostat.
6. For first-time users only: Press Connect again to
resume the pairing process.
7. While waiting, make sure the thermostat
and iPhone are within reach of the
nearest Wi-Fi access point.
8. When thermostat is connected, it is
automatically listed on the device page.

16 | Installation guide16 | Installation guide
Purge - For fan coil units with a 3-way valve at the
top or bottom of the riser network, you can set a
purge time that will flush the water through the coil
for 5 minutes. This ensures the water in the coil is
an appropriate temperature for the desired heated
or cooling.
Temperature Calibration - This setting is to be used
only when the thermostat placement may affect
the temperature reporting. If your thermostat is in
direct sunlight or next to a cold window, consider
calibrating the temperature to offset the factors
affecting the temperature reading.
Freeze Protection Sensor - Sensor attached in
front of coil monitors incoming air temperature and
sends signal if incoming air temperature reaches
0°C/32°F. Unit will enter freeze protection mode.
Drain Pan Overflow Sensor - Float sensor monitors
the level of water in the condensate drain pan. If
water level gets too high, the unit temporarily shuts
down to stop producing more condensation.
Glossary