About Your Universal Fan Coil Thermostat

Thermostat Overview

The Universal Fan Coil thermostat is specially designed by Unilux HVAC to control our full line of vertical stack and horizontal fan coils. This includes 2-Pipe systems (with or without auxiliary heating and/or an aquastat) and 4-pipe systems.

Your Universal thermostat can be operated through the Unilux HVAC Thermostat mobile app, available on Apple and Android app stores. Visit “Registering your Unilux HVAC thermostat account” for full instructions on pairing your mobile device.

In the case of a power outage, your thermostat is equipped with a battery backup that will last for up to one hour with a dimmed backlight. Your thermostat settings (minus custom screen layout and sleep countdown) will be saved in your thermostat memory, however your Wi-Fi network may need to be reconnected.

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	2mm 2 cable
6.	Operating Temperature	32°F ~ 122°F / 0°C ~ 50°C
7.	Storage Temperature	23°F ~ 122°F / -5°C ~ 50°C
8.	Operating Humidity	5~95% R.H. non-condensing

Technical Data

Measurable Range: 32°F -99°F / 0°C-40°C Controllable Range: 40°F – 95°F / 5°C-35°C Resolution: 1°F / 0.5°C	If temperature drops below measurable range, temperature display will read “LO” If temperature rises above measurable range, temperature display will read “HI” If sensor disconnects or shorts, thermostat will display “–” and heat/cool output will turn off

Measurable Range: 32°F – 99°F / 0°C – 40°C Controllable Range: 40°F – 95°F / 5°C – 35°C Resolution: 1°F / 0.5°C	If temperature drops below measurable range, temperature display will read “LO” If temperature rises above measurable range, temperature display will read “HI” If sensor disconnects or shorts, thermostat will display “–” and heat/cool output will turn off

Warning Symbols

E1 Error Code	Appears on thermostat display if your fan coil’s water temperature sensor is not detected or if your thermostat is configured as a 2-pipe fan coil when connected to a 4-pipe system. Please contact your HVAC service provider.
Defrost Indicator (Anti-Freeze Mode)	Appears on thermostat display when either of the following occurs: room temperature is below 41°F / 5°C remote water temperature sensor reads below 34°F / 1°C 24VAC trigger signal is ON at FZ terminal All of these events indicate your fan coil has sensed low temperatures and is automatically working to conserve operational temperatures. Please contact your HVAC service provider to assess potential damage to your unit.
Drain Pan Indicator	Appears on thermostat display when your fan coil’s drain pan is close to overflowing (24VAC signal is triggered at DP terminal). Your fan coil will stop operating until serviced to prevent flooding (fan will be forced OFF and all water valves closed). Please contact your HVAC service provider.

Appears on thermostat display if your fan coil’s water temperature sensor is not detected or if your thermostat is configured as a 2-pipe fan coil when connected to a 4-pipe system.

Please contact your HVAC service provider.

Appears on thermostat display when either of the following occurs:

room temperature is below 41°F / 5°C
remote water temperature sensor reads below 34°F / 1°C
24VAC trigger signal is ON at FZ terminal

All of these events indicate your fan coil has sensed low temperatures and is automatically working to conserve operational temperatures.

Please contact your HVAC service provider to assess potential damage to your unit.

Appears on thermostat display when your fan coil’s drain pan is close to overflowing (24VAC signal is triggered at DP terminal).

Your fan coil will stop operating until serviced to prevent flooding (fan will be forced OFF and all water valves closed).

Please contact your HVAC service provider.

E1 Error Code

Appears on thermostat display if your fan coil’s water temperature sensor is not detected or if your thermostat is configured as a 2-pipe fan coil when connected to a 4-pipe system.

Please contact your HVAC service provider.

Defrost Indicator (Anti-Freeze Mode)

Appears on thermostat display when either of the following occurs:

Room temperature is below 41°F / 5°C
Remote water temperature sensor reads below 34°F / 1°C
24VAC trigger signal is ON at FZ terminal

All of these events indicate your fan coil has sensed low temperatures and is automatically working to conserve operational temperatures.

Please contact your HVAC service provider to assess potential damage to your unit.

Drain Pan Indicator

Appears on thermostat display when your fan coil’s drain pan is close to overflowing (24VAC signal is triggered at DP terminal).

Your fan coil will stop operating until serviced to prevent flooding (fan will be forced OFF and all water valves closed).

Please contact your HVAC service provider.