Installing the Rain Machine Internet Connected Smart Irrigation Controller

I finally got around to replacing my 25 year old analog Toro irrigation controller. I have to say - this Toro controller was built like a tank - still functioning perfectly after 25 years - but limited by the functionality developed at the time.

Rain Machine - Completed Installation

Here's a photo of the Toro that I replaced:

Toro Analog Irrigation Controller

The rationale for replacing the Toro controller was to have multiple watering programs for different phases of lawn care during the year - for example - a soaking program following fertilizer or nemotode treatments, programs to water under the large shade trees which don't receive a lot of rain water when the leaves are on the tree, spring and summer watering programs, etc. The advantage of the Rain Machine is that you can create these programs, and enable, disable or schedule them as required, all from your smart phone or tablet. You can also have multiple programs enabled concurrently - which is useful for watering flowerbeds on a different schedule than watering your lawn.

The Rain Machine was quite simple to install. I began by labelling all the wires attached to the Toro controller prior to removing the Toro. There was a few peculiar wiring characteristics worth mentioning. The rain sensor in my system was simply an interrupt switch on the common circuit - so I had to identify the two wires going to the rain sensor which wouldn't be used with the Rain Machine - the Rain Machine uses weather forecasting and rainfall data to modify watering based on internet weather data. The rain sensor is not required (and in my case, was not functioning anyway). 

Once I began installation of the Rain Machine - I immediately ran into a problem. The wiring connections on the Rain Machine are TINY - the manual specifies it will take wire from 14 to 22 gauge - but it was impossible to install the wiring from my system directly to the Rain Machine connections - my wiring was stranded 12 or 14 guage wire - and it wasn't possible to get them installed security. So - I ended up crimping on short pigtails of 18 gauge stranded wire to be able to make the connections securely. 

Installation of 18 gauge pigtails to my irrigation cabling, to permit secure connections to the connection blocks

18 gauge pigtails to facilitate connections to the tight terminal blocks on the Rain Machine

Once the wiring was completed - there was a second problem - it looked horrible, and there was no way to install cable relief to prevent the wires from being pulled out of the connection blocks. If you compare this to the Toro irrigation controller, which had a large cavity for making the connections, complete with a cable grommet to secure the field wiring and prevent it from being pulled out of the connection blocks. 

Not a pretty installation - no place to hide the cables inside the Rain Machine. 

In order to neaten the installation - I used a short length of plastic cable channel used in automation panel cabling - to tuck the wires and help prevent them from physical damage / snagging / pulling from the connection blocks.

Plastic cable channel for hiding field wiring

Once this was done - I also tucked the power cable from the power brick into the cable channel, and covered the channel to completely hide the wiring. 

Cover on the cable channel

What would be my constructive criticism to Rain Machine to facilitate installation? Larger cable termination block, wider spaced terminals to accept larger gauge field wiring, and some form of cable management for neater field installations. You can see that they've put an emphasis on the industrial design of this unit, and made it as small as possible. This seems to sacrifice the practicality of installation, however.

Conclusion

How does the Rain Machine work in practice? Quite well - the smartphone / tablet app works very well, intuitive - quick to run individual zones, easy to set programs, run multiple programs at a time, disable programs without deleting them so that you can keep them from season to season, and nice to see the watering history and weather history, and the adaptation of watering times based on the weather and rainfall history. I haven't had a chance to check on Alexa integration yet, will update the post when I get the chance.

Sources and Links

I hope you found this post useful. Feel free to ask questions in the comments section below. I answer all questions.