# Water Tank 2.1 (WT 2.1)

Enapter’s Water Tank 2.1 provides storage for 38 liters of clean water for the AEM electrolyser. The water tank is rack mountable into a standard 19” cabinet. The tank contains a conductivity sensor and a pump system to supply up to 11 AEM electrolysers with clean water.

# 📖 Resources

Datasheets Owner’s Manuals Simplified PID Quick Start Guides CAD Drawings
WT 2.1 EN EN PNG EN 3D STP

# 📸 Images

Front Back Isometric
WT 2.1 Download Download Download

# 🚦 Status LEDs Indications

Action Description LED
Power on The device will turn on as soon as the required input voltage is supplied to the WT 2.1; then, it performs a start-up self-check. Red, yellow & green blink thrice
First Tank Refilling At the first refilling, the machine will cross the very low water level, low water level, and waiting for water warnings before to go on an optimal operating condition. First yellow, then green blinking
Feeding The device is ready to refill downstream devices: the pump is ON and the solenoid valve is closed. Green blinks
Refilling The solenoid valve is open for tank refilling. Green steady
Warning The system will partially continue to work. The warning can be reported using remote monitoring and resolved automatically by the system. The heads-up event which should be taken into account to avoid Error or Fatal Error. Yellow blinks
Error The system stops. Remote monitoring will report Errors. These can be resolved by the system or by contacting the Enapter Support. Red blinks slow
Fatal Error The system stops. Unrecoverable error: hardware repair is required. Red blinks fast

# Logic States

NAME DESCRIPTION
N/A Not active
Stop Water Tank is stopped
Maintenance The device is in maintenance mode (can only be enabled by Enapter technicians)
Bad quality water input The inlet water quality is not respecting the specification
Waiting for water The device is waiting for receive the optimal amount of water
High water inlet temperature The water inlet temperature is too high
Low water inlet temperature The water inlet temperature is too low
Very low water level The water volume is too low to guarantee water to the electrolysers
Low water level The device is waiting for receive the minimal amount of water
Very high water level (warning) The water volume is high. The device will monitor if any internal malfunctioning is going on
Low water tank temperature The tank water temperature is low. Please run the device according to the specifications
Very high water level (fatal error) The water volume is too high
Tank refilling issue The refilling was not completed in the allotted time. Please check the water source flow rate accords the specs required by the device
Tank temperature sensor broken Please contact Enapter Customer Support. Tank temperature out of limits
Inlet temperature sensor broken Please contact Enapter Customer Support. Inlet temperature out of limits
Water level sensor broken Please contact Enapter Customer Support. Water level out of limits
Current sensor broken Please contact Enapter Customer Support. Current out of limits
Water leak It is water presence in the chassis
Valve leak The valve in the water inlet line is leaking
Pump broken Please contact Enapter Customer Support. Pump current consumption out of limits
Factory settings reset failed Factory Settings Reset is failed for some reason
Internal error Internal error

# 📈 Remote Monitoring and Control

# Introduction

Water Tank 2.1 comes with pre-installed UCM (Universal Communication Module) that allows users to monitor the device. Over-the-air updates ensure that the latest protocols and security fixes are supported.

Pre-installed UCM connects to the Enapter Gateway and send performance and error data to the Enapter Cloud. The data is stored in a time series database which displays it real-time on customizable dashboards.

Enapter’s mobile application ensures quick and easy installation of any energy system. Users can manage the Water Tank 2.1 via the mobile app and will receive push notifications to warn of energy system issues.

# Network Requirements

# WI-Fi Requirements

  • 802.11a/b/g/n (2.4 GHz only)

  • 802.12 WEP, WPA, WPA2 Personal (Pre-shared key)

  • Wi-Fi client isolation must be disabled

Note

No captive portal or WPA2 Enterprise supported.

General Wi-Fi Note

The Enapter Cloud connection based on wireless communication and therefore the functionality can be affected with distance in between devices, obstructions between the devices and interference. Communication module inside the Water Tank 2.1 works in station mode and utilizes Wi-Fi channel set in your infrastructure Wi-Fi router for used SSID. You are responsible to select the correct channel according to the local radio regulations.

# Connecting your Water Tank 2.1 to Wi-Fi

To connect the Water Tank 2.1 to wireless networks, follow the steps in the iOS or Android Mobile Application guides below. Please note, the QR-code or preinstalled UCM’s ID and PIN are required when connecting to Wi-Fi as well as credentials for the 2,4 GHz Wi-Fi network.

📗 Enapter iOS Mobile Application Guide

📗 Enapter Android Mobile Application Guide

During connection to Wi-Fi network the QR-code or preinstalled UCM’s ID and PIN needed. The location for both of them is shown on pictures below.

Front view:

WT 2.1 QR-code Location

Rear view:

WT 21 UCM ID Location

# ⚠️ Events

# Severity Levels

Code Severity Level LED Indication Description Comment
F Fatal Error Red blinks fast System stopped. Unrecoverable error. Hardware repair required. e.g. Level sensor is not connected or broken.
E Error Red blinks slow System Stopped. Recoverable error. e.g. No input water pressure and internal water tank is empty.
W Warning Yellow blinks Heads-up event which should be taken into account to avoid Error or Fatal Error. e.g. No input water pressure and internal water tank is full.

# Routines

Code Routine Comment
L Logic
S Safety

# Warning, Error and Fatal Error Codes

Note

The Code and Name marked in bold are introduced in current release of firmware.

Name Severity Code Routine Code Component Condition Description
WL_1 W L CT01 Conductivity > 20µS BAD QUALITY WATER INPUT
WL_2 W L LT01 Liters <= 8.55L LOW WATER LEVEL
WL_3 W L LT01 8.55L < Voltage <= 23.7L WAITING FOR WATER
WS_1 W S TT01 Temperature > 45 °С HIGH WATER INLET TEMPERATURE
WS_2 W S TT01 Temperature < 1 °С LOW WATER INLET TEMPERATURE
WS_3 W S LSL Water level below level switch VERY LOW WATER LEVEL
WS_4 W S LSH Water level over the level switch VERY HIGH WATER LEVEL
EL_1 E L -- Refilling timeout TANK REFILLING ISSUE
ES_1 E S TT02 Temperature < 1 °С LOW WATER TANK TEMPERATURE
ES_2 E S SV01 When the SV01 is closed, the water level has risen above the permissible value VALVE LEAK
FL_1 F L SV01 Refilling timeout TANK REFILLING ISSUE
FS_1 F S WPS01 Water sensor is wet WATER LEAK
FS_2 F S TT02 Voltage at the TT02 < 88mV TANK TEMPERATURE SENSOR BROKEN
FS_3 F S TT01 Voltage at the TT01 < 88mV INLET TEMPERATURE SENSOR BROKEN
FS_4 F S LT01 Low voltage on the LT01 when the water level is higher than the LSL sensor WATER LEVEL SENSOR BROKEN
FS_5 F S CS01 Current sensor reference value < 2.4V CURRENT SENSOR BROKEN
FS_6 F S P01 Current consumption > 1.3 A PUMP BROKEN
FS_7 F S LSH Water level over the level switch VERY HIGH WATER LEVEL
FS_8 F S LT01 When auto-calibration LT01 performed, the LT01_V was in the unacceptable range WATER LEVEL MISCALIBRATED

# 🕸️ Dryer Control Network

For more information please check Dryer Control Network (opens new window) Documentation.

# ⚙️ Factory Settings Reset

Factory Settings Reset (Hard Reset) allows to reset device to factory settings.

To enable Factory Settings Reset:

  • Turn off the device.
  • STo begin Factory Settings Reset, turn Water Tank on and off 3 times. Turn the device on, as soon as the LEDs light up, turn the device off again. Wait for the LEDs to stop blinking before turning the device on again.
  • Switch ON Water Tank. All LEDs will blink once.
  • Factory Settings Reset started. Device will be automatically rebooted. All LEDs blink three times.

# 💻 Firmware

# Latest Version

# Previous Versions

# How to Update the Firmware?

Note

If Site has Enapter Gateway it needs to be updated to version 1.8.9 or higher.

Note

Make sure you have physical access to the device before starting the update process.

Warning

Do not power off the device during the firmware update.

Warning

Remove Dryer Control Network before updating the firmware.

To update the firmware Water Tank must be connect to the Enapter Cloud (opens new window). How to do it please check this chapter.

# Updating the Firmware Using Enapter Cloud

  1. Login into Enapter Cloud (opens new window).
  2. Open your Site navigate to Water Tank’s page you want to update.
  3. At the left sidebar click on the Update Firmware button at the Firmware Info section.
  4. In opened window click on the Check for updates button.
  5. If you have the latest firmware version you will see You have the latest version.
  6. If update is available you will see Change Log.
  7. Click the Update button to update the firmware.
  8. Wait until the update complete. This can take a while.

# Updating the Firmware Using Enapter Mobile App

  1. Login into Enapter Mobile App.
  2. Open your Site and navigate to Water Tank’s page you want to update.
  3. Navigate to the About tab (ℹ️) and click on the Firmware button.
  4. In opened tab click on the Check for Updates button.
  5. If you have the latest firmware version you will see You have the latest version.
  6. If update is available you will see Change Log.
  7. Click the Update button to update the firmware.
  8. Wait until the update complete. This can take a while.

# Updating the Firmware Using Electrolyser Web GUI

Note

To update Water Tank’s firmware using Electrolyser Web GUI (opens new window) Electrolyser 2.1 must be updated to firmware 1.10.0 or above.

Important

Never upload firmware files received from untrusted source. Enapter is not responsible for any misbehavior or harm caused by untrusted firmware usage or violating update instructions. Contact Enapter Customer Support with any questions and to ensure that correct firmware files are used.

It is always recommended to update Water Tank’s firmware using Enapter Cloud and Mobile Application. However these types of update require stable internet connection. In cases when it is not possible to have your Water Tank connected to Enapter Cloud it is possible to update Water Tank’s firmware using Electrolyser Web GUI.

To perform update:

  1. Save and unzip the received firmware package to local hard drive of your computer the way you have two files named fw_ucm_WT21_X.X.X.ena and fw_cbd_WT21_X.X.X.ena next to each other.
  2. Open Web GUI (opens new window) of your electrolyser.
  3. Navigate to Dryer Control Network tab.
  4. Navigate to Device Details.
  5. Click Update link. The Upload Firmware screen will appear.
    Web GUI - Upload Firmware
  6. Drag and drop or Select file with UCM firmware named fw_ucm_WT21_X.X.X.ena from your local hard drive.
  7. On the screen you will see the confirmation that firmware file is recognized by showing up the UCM Firmware version.
  8. Press Upload button and wait the process to finish with Upload and Installation steps. It will take up to 10 minutes. Do not turn Electrolyser and Water Tank off and do not close the browser.
  9. Press Done after receiving the message UCM firmware was updated successfully.
  10. Drag and drop or Select file with UCM firmware named fw_cbd_WT21_X.X.X.ena.
  11. On the screen you will see the confirmation that firmware file recognized by showing up the Control Board Firmware version.
  12. Press Upload button and wait the process to finish with Upload and Installation steps. It will take up to 10 minutes. Do not turn Electrolyser and Water Tank off and do not close the browser.
  13. Press Done after you will receive the message Control Board was updated successfully.
  14. To check the update was done successfully navigate to Dryer Control Network tab in the EL 2.1 Web GUI and check device details.