It is highly recommended to first configure your HydroFLASH WiFi device for your wireless network while it is conveniently located next to your computer or router before mounting the device at its final location. This will also allow you to program and become familiar with the device, its web interface, LCD display messages, Mobile Application use, etc. all while comfortably seated at your computer.
For Hardwired versions you can skip this process if desired however we recommend it regardless. Please refer to section 2.0 of the HydroFLASH User Manual for full details on this step prior to continuing with the hardware installation.
Locate your existing sprinkler controller. If
desired, record your current stations number and run times if not already
Remove power or unplug your existing controller.
If not already labeled by number or area
description, identify each station wire that is currently connected to the
existing terminals on your old controller. Optionally take a picture of the
current wiring configuration for later reference.
If your wires are not color coded for easy identification, then you will need to label them using masking tape and a pen or using another method. One or more wires may be connected to a terminal labeled “Common”. Label these “COM”.
If you have a rain sensor connection, remove these and label. Note that some rain sensors are wired in series with the 24VAC wire. HydroFLASH has a dedicated rain sensor input that will uses the two wires from the sensor without connecting them in series 24VAC input. Remove any connections between the rain sensor and the 24VAC input.
Remove the 24V AC connections from the terminals
your existing controller uses a Wall AC adapter.
Remove the old controller from the wall if
Depending on the mounting surface, select the
proper screw for the desired location (drywall, wood, etc.) and mount the HydroFLASH device to the wall using the mounting tab holes
on each side. Mount the device so that your existing sprinkler control wires
can reach the green terminal block and within reach of an AC outlet where you
can plug in the AC adapter (and optionally your Insteon
There are three connectors on the HydroFLASH terminal block. The one to the far right has 2
terminal connections and is labeled “24VAC”. Connect this to the two wires on
the AC adapter. (Do not plug in at this time).
To the Left of the 24VAC connector are 18
terminal connections. The 2 on the far right are labeled “COM” and are used for
the common return wire(s) you previously identified in step 3. Connect your
wire or wires labeled “COM” to one or both terminal blocks. The remaining 16 connections
are labeled 1 to 16 from right to left and should be connected to the matching
station wire or wires you identified in step 2. Note that a maximum of 3 valves
can be connected to one station terminal if desired, however this information
MUST be entered into the HydroFLASH Settings Page to
prevent accidental activation of more than 3 valves at any one time. If this
step is not performed you may blow the internal protection fuse (replaceable).
The last connector on the left is a 2 pin
terminal connector that is used if you have a rain sensor. Most rain sensors
are a “normally closed” device but some are “normally open” or provide wiring
options (3 wires) for both configurations. If you have a “normally closed” rain
sensor, then you
will need to configure the rain sensor type on the HydroFLASH Settings page to “normally closed” as the default is set to “normally open” if a rain sensor is not installed. If not properly selected your system will think it is on rain delay when it is not raining and vise versa.
purchased a Insteon Serial
Modem, connect the 9 pin serial cable connector to the 9 pin connector on the
side of the HydroFLASH device.
Now take a minute and double check your
connections to ensure you have properly connected and tightened each of the
green terminal block screws and the wiring is properly connected (Don’t over
tighten, but make sure the wires are firmly fastened in the terminal blocks).
Plug in the Insteon
serial modem if installed and then plug in the 24V AC adapter into the wall.
You should see the “HydroFLASH
booting....” message on the display shortly followed by the “*** HydroFLASH *** Controller” display and then sequencing
through the various informational displays that reflect IP address, signal
strength, System State, Rain State etc.
4. Your system is ready to use. Please refer to the HydroFLASH user manual for further configuration.