PNI CT400 Wireless Smart Thermostat User Manual

: June 6, 2024
: PNI

Wireless smart thermostat PNI CT400
Internet controlled for 2 zones central heating, pumps,
electro valve

WARNINGS

Because the product must be connected to a 230 VACpower supply and to a heating appliance, installation should only be carried out by qualified personnel to avoid irreparable damage to the product and/or the heaters that are connected, defects not covered by warranty.
We recommend that you have qualified personnel with experience in this field, for the initial setup of the equipment in order to understand correctly the technical terms and procedures detailed in this manual.
After installation and configuration, the product is easy to use both the mobile unit and smartphone control with an intuitive and easy to configure interface.
To access/monitor / control the product remotely from your smartphone, it is necessary to have an internet source (WiFi router) close to where the thermostat is installed.

GENERAL INFORMATION

The PNI CT400 smart thermostat has been developed to provide customers extra day-to-day comfort in their homes, in the office or other premises, offering the ability to monitor and turn on or off heating systems either automatically scheduled for every day of the week, either remotely, anytime and anywhere via the Internet with a dedicated app for Android or iOS Smartphone for two distinctive zones hydraulically separated by pumps, solenoid valves or even separate heating boilers.

Mode of operation and communication:

The dedicated app name is Tuya Smart and can be downloaded either from the Google Play /App Store or by scanning with your smartphone the QR code below:

http://smart.tuya.com/download

Package content:
– 2 x Main unit with an illuminated screen
– Receiver / 2 relay command unit
– Wall/table mount accessories
– User manual

TECHNICAL DETAILS / SPECIFICATIONS

– Main unit power supply: 2 AAA batteries
– Receiver power supply: 230VAC 50 / 60Hz
– Receiver unit command type: 2 x NO/NC Relay (normal open/close)not energized / dry contact
– Relay parameters: 250 V max, 10 Amps max (rezistiv), AC/DC curent
– Set point range temperature: 5 – 35 ° C (0.5 ° C step)
– Measurable ambient temperature: 0 – 50 ° C (0.1 ° C step)
– Temperature measurement unit: only o Celsius degrees
– Acceptable humidity: 85% no condensation
– Screen illumination: white light
– Temperature sensor: NTC 10K, 3950ohms at 25°C
– Sensor accuracy: ± 0.1 °C (0.5 °C step sensor calibration)
– Protection degree: IP30
– Housing: ABS with UL94-5 fire retardant plastic standard
– WiFi connectivity: 802.11 b / g / n (2.4 GHz); WPA2 (TKIP and AES)
– RF frequency connectivity between units: 868 MHz
– Smartphone Compatibility: Minimum iOS 9 / minimum Android 4.2

MAIN UNIT DESCRIPTION

RECEIVER DESCRIPTION

FIRST USE WARNINGS AND INSTRUCTIONS

The system comes with a main unit and receiver paired from the factory. Before use, you only need to pair the receiver unitwith the nearby Wireless Router.
At first start, the thermostat/receiver unit signals by LED 1 = “ slow blinks” which means it is necessary to connect the unit to the wireless router with Internet access.
Insert 2 AAA alkaline batteries (not included) into the main unit and turn it on by pressing the ON / OFF button. The settings appear as shown in the above description.
Connect the receiver unit to a 230 VAC power supply (only qualified personnel). Make sure it works properly by testing / checking the LED status and turning the unit On/Off by the dedicated button.

I. PAIRING THERMOSTAT WITH MOBILE APP AND WIRELESS INTERNET ROUTER

Connect your smartphone to the nearby wireless internet network. Activate GPS location on your smartphone if it is not activated. For a quick setup, make sure that both the phone, thermostat and receiver are as close as possible (1-3 m).
Download the “TuyaSmart” application from Google Play or App Store and install and register a new account.
Add a device by pressing the + button in the upper right corner.
Click on “All Devices” and access the Small Home Appliances category.
Find “Thermostat” or “Heater” in the list and select. Follow the on-screen steps, check the name of the Wifi network and enter the password of the Wifi network with internet access to which the phone is also connected.
Press and hold the pairing button on the receiver to enter the wifi pairing/connection mode until the LED flashes quickly. (LED 1 flash rarely, a sign that it is not connected to Wifi internet network)
Click the “Confirm indicator rapidly blink” box on the phone.
Wait for the countdown displayed on the screen until the connection is completed. The LED on the receiver will not flash and will remain lit continuously. At this moment the connection to the Internet through the Wireless The router is successful.
The receiver unit (gateway) will appear in the application together with the 2 thermostat units.
If the LED continues to flash slowly, the connection failed, try again from step 1.
If only the Gateway receiver unit appears in the application, in exceptional cases go to chapter II “Pairing the thermostat unit with the receiver unit”.

FIRST USAGE OFTHERMOSTAT

WARNING: Each display unit will control a single output from the receiver unit corresponding to the zone that is monitored by the respective unit.

With screen On, from the thermostat unit change the set temperature higher or lower than the measured and displayed temperature.
In a maximum of 90 seconds, the thermostat unit sends the command to the receiver unit, which confirms audibly with a “click” (the relay from inside) and visually on-screen by turning on/off the heating icon.
From the phone application “TuyaSmart” (make sure that the device appears online after setting up the internet) and press one of the 2 thermostats to access it. Using the “+” and “-” buttons or the round cursor change the temperature higher or lower than the measured temperature from the room and display it on the screen.
In a maximum of 90 seconds, the application sends the command via the internet to the receiver unit, which confirms audibly with a “click”,(the relay inside) after which the heating icon appears/disappears on the screen. Simultaneously, the temperature displayed on the thermostat unit will change according to the command. If the change does not take after 90
– 180 seconds (2 minutes) check again:
– if you have changed the temperature higher / lower than the measured one in the room and displayed;
– if the device is online in the application (Online – Intense color; Offline – faded color and “Offline” message).
– if the thermostat is connected to the receiver – check the status of the radio signal indicator and the status of the thermostat in the mobile application (Online or Offline).

II. PAIR MAIN UNIT WITH RECEIVER UNIT

WARNING:
If the receiver unit is connected to the Router / Internet you can proceed to this step only if it is absolutely necessary (note the lack of communication) because the 2 units come paired from the factory.
If the receiver unit is not connected to the Router / Internet, it is mandatory to first connect it to the Router /Internet using the mobile application.
Perform this procedure only if absolutely necessary: if the connection of the receiver unit to the wireless router was successful but the thermostat unit does not receive/send for 5-10 minutes the commands sent/received to/from the mobile application and the icon is missing from the screen.

Press and hold the code pairing button on the receiver until the LED flashes quickly.
With the screen closed (press the On / Off button) press and hold the M button on the thermostat unit until a 4-digit code and “Radio signal indicator” appear on the screen. Immediately press the “up arrow” button for pairing.
The LED flashes slowly for a few moments after which it stays on. Icon flashes for a few moments after which it remains on, on the screen confirming that the pairing is completed.
Turn the thermostat unit on and off and test the functionality by changing the set temperature higher / lower than the current temperature displayed on the screen.

III. LED DESCRIPTION

LED continuously lit – The receiver unit is connected to the Router / Internet via wireless.
LED flashes quickly – pairing with the Thermostat Unit or the Internet Router.
LED flashes slowly – The thermostat/receiver is not connected to the internet.

IV. SIGNAL LOST OR WEAK

In case of loss/disconnection of the RF signal (between the receiver and the thermostat unit) the icon will disappear from the screen (or blink rarely).
In case of disconnection from the Wifi network (Internet), The LED on the receiver unit will flash rarely. Move the units closer to each other, and the receiver unit to the WiFi router and check the status of the devices again.
If in a few minutes the operation does not return to normal, perform the pairing procedures of the receiver to the internet Router (with app) and with the thermostat unit afterward.

HOUR/DATE SETTING

With the main unit screen On, press and hold the M button for 5-6 seconds until the hour on the screen blinks.
You will see highlighted 0:00 on the screen. Set the minutes with the up and down buttons.
Continue pressing the M button.
Set the time with the up and down buttons.
Continue pressing the M button.
Select the day with the up and down buttons.
Continue pressing the M button.
Save the settings by pressing the ON / OFF button or wait about 15 seconds.

OPEN WINDOW DETECTION FUNCTION

When the “open window detection” mode is activated in advanced settings, the system will automatically switch off the heating if a sudden decrease in temperature (2°C in 15 minutes by default) occurs. This function is useful when opening a door/window (eg ventilation) without stopping the heating.
The thermostat will return to the previous working mode after 30 minutes, and the “OP” icon will disappear from the screen. Press any button and the thermostat will exit the OWD function during the heating off period.

OTHER FEATURES AVAILABLE IN YOUR SMARTPHONE APPLICATION

In the “TuyaSmart” application you have the following functions available:
– Display the measured temperature and the temperature-programmed / desired / set by the user;
– Heating Status Display: The text “Heating on” appears in the upper-left when the heat is on;
– 3 working modes: Manual, Eco (economical), and Automatic (according to daily programming)
– Lock thermostat keys to stop accidental typing: Activate the Settings / Child Lock function
– Daily scheduling (7 days) with 4 time periods each day;
– Timed programming (Schedule)
– Temperature correction – allows the correction of the read temperature compared to another standard thermometer.
– Set maximum temperature limit / Set minimum temperature limit
– Frost protection

SET UP DAILY PROGRAMS

This setup can also be done from a smartphone app, which we recommend.
With the on-screen display, press and hold the P button (6-7 seconds) to enter the PROGRAM settings. Days of the week are fixed from Monday to Sunday (1 ~ 7), each day has 4 time periods (1 ~ 4). Each press of the P button can be performed in the next setting.

Press P and hold for 3 seconds, the “hour” display flashes, change the value with the + and – buttons.
Press the P button, the temperature blinks, change the desired temperature with the + and – buttons.
Press the P button for the next time.
Repeat the settings for the other days and periods similarly.

Period	1	2	3	4
Hour	Temp	Hour	Temp	Hour
12345 (Mon-Fri)	7:00	22°C	8:30	19°C
6 (Sat.)	8:00	22°C	8:30	22°C
7 (Sun.)	8:00	22°C	8:30	22°C

ADVANCED PARAMETER SETTINGS

Turn the thermostat screen Off by pressing the On / Off button. With the screen Off, press and hold in the same time and button for parameters settings.

MENU	Description	Values	Default
1	Temp. calibration for internal sensor	-WC — WC (step 0.1°C)	0 C
2	SetPoint Max.	5°C — 35`C	35°C
3	SetPoint Min.	5 C — 35″C	5°C
5	Frost Protection Temp.	5°C — 15`C	5°C
9	Histerezis (Deadzone – 0.1 C step)	0.2°C — 3`C	0.5°C
11	Child protection	1: ON: Off	0
12	Open window detect function-OWD	1: ON: Off	0
13	OWD – Detect time	2 — 30 minutes	15 minutes
14	OWD – Drop temp. select (within detect time)	2,3,4 C	2°C
15	OWD – Delay time select
(Return to previous working status)	10 — 60 minutes	30 minutes
17	Factory reset	0: No	0

1: Yes, and then press the On/off button for 5s, wait until the thermostat restart.
| Software Version| 5055-02|

RECEIVER WIRING DIAGRAM

The operation of connecting the receiver unit with a 230 V power supply and central heating system must be performed only by qualified personnel and only after consulting the thermostat and boiler documentation. The receiver unit has two relay-type controls (COM-NO-NC / Normal Open and Normal Closed) without potential (non-energized). Each relayexecutes the closing/opening of a control circuit with a maximum current of 10 A, and a maximum voltage of 250 V AC / DC.
So if the heating system is designed with 2 hydraulically separated zones with 2 pumps/solenoid valves or even 2 boilers, you can separately control the heating of each zone (pumps/solenoid valves/boilers) separately with the help of this thermostat with 2 monitoring/control units. Find examples of connection with pumps/solenoid valves or certain models of thermal power plants at the end of the manual. Find examples of connections with certain models of Gas boiler Systems at the end of the user manual.

EXAMPLE OF DIAGRAM CONNECTION OF PNI CT400 THERMOSTAT WITH 2 PUMPS / SOLENOID VALVES WITH 230V AC SUPPLY *

The installation must be done only by the authorized installer and only after consulting the manuals, and checking the connections and their compatibility.

CONNECTION EXAMPLES WITH GAS BOILER SYSTEMS- THERMOSTAT PNI CT400 *

The installation must be done only by an authorized installer and only after consulting the user manuals, and checking the connections and their compatibility.
In this case, each relay will control one of the two gas boiler systems dedicated for one of the 2 zones.
1. Ariston CLAS EVO SYSTEM
2. Ferroli DivaCondens 24/28
3. Vaillant Ecotec Pure
4. Motan Max Optimus