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.

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Solving slow clothes drying performance with an inline duct booster fan - Fantech DBF4XL

Since moving into our new house - we've seen our clothes drying times double. The clothes dryer gets very warm, but due to a long duct run to the exterior of the house - airflow is reduced. The duct run is about 30 feet, not including losses due to elbows and fittings. Large loads would take 2 hours to dry.
The Fantech DBF4XL Dryer Booster Fan with Pneumatic Sensing Control
Some research lead to inline dryer duct fans - which improve dryer performance by overcoming the duct loss due to the length of the duct. I have a standard clothes dryer with 4" diameter round ductwork. The ducts were all sheet metal ducts, with only a short length of flexible at the dryer connection, so the ductwork was already optimized by being as smooth and as short as possible to reach the exterior of the house.

Fantech DBF4XL - Serial Number Plate - On the Pneumatic Timer Control Box
I decided to go with a Fantech model with a pneumatic switch that automatically detects the change in air pressure in the dryer duct when the dryer is activiated, then turns on the booster fan in 10 minute timed periods. At the end of the 10 minutes - the booster fan switches itself off - and if the dryer is still operating - the pneumatic control turns the fan back on for another 10 minutes. I found the Fantech DBF4XL on eBay - previously installed but never used - for a good price.

Reading the installation instructions for the fan - they recommend the installation of a secondary lint screen upstream of the fan to help protect the fan from clogging with lint. When I opened my dryer duct - I had plenty of lint in the duct - which indicated that the lint screen in my dryer was passing a lot of lint - more on this later. So - onto eBay where I found a Fantech secondary dryer lint trap for a reasonable price.

Once the secondary lint trap and fan were received, I set to work. My dryer vent line ran through the basement under the first floor where the laundry room is. So - it was a simple matter to cut into the dryer line where it ran under the floor - and duct in the secondary lint trap and the booster fan.

The secondary lint trap has a clear plastic window which helps to show when the filter box needs cleaning. It's a neat looking installation - but would be much more convenient installed directly behind the dryer.
Installing the Fantech Secondary Dryer Lint Trap - Note the Laser Line - Simplifies Lining up the Ductwork
The filter box ending up screwing directly into some wood cross members under the floor - straight through the base of the filter box. Very simple.
Fantech Secondary Dryer Lint Trap - Installing the Filter Box with the Cover Removed - Note the Laser Line
When installing the secondary lint trap and lining up the booster fan - I used a laser level with vertical laser line to line the filter box, fan and ductwork nice and straight - to have a professional looking installation. The laser really facilitates the installation.
Installing a wood block to install the Dryer Duct Booster Fan - Four Tapcon Screws into the Elevated Concrete Slab

Secondary Dryer Lint Filter Upsteam of Dryer Booster Fan

Secondary Lint Filter and Dryer Booster Fan Installed
Very important installation point on the booster fan - the booster fan uses a pneumatic diaphragm switch - the copped colored cylinder in the photo below. The diaphragm needs to be oriented vertically so that gravity does not act on the diaphragm - which would work either for or against the pneumatic pressure and upset the operation of the switch - your switch would either be on all the time, or not activate reliably on duct pressure. It's very simple to rotate the fan on the installation bracket so that the diaphragm is vertical. When installing the bracket - take care not to install the self tapping screws to close to the center of the fan enclosure - you could screw into the fan impellor and block the impellor from turning. It's not as complicated as it sounds - you just need to take care with these points on installation.
Fantech Dryer Booster Fan - Note the Orientation of the Copper Colored Pneumatic Switch - This needs to be oriented vertically for it to work properly.

Conclusion

So - how does it work? Perfectly. It switches on and off automatically as described above. I haven't had any issues with the booster fan turning on when not required, and it recycles automatically in the ten minute intervals without any issue.  The secondary lint filter needs to be cleaned once every two dryer loads on average - which is more frequently than what I hoped. It would have been much more convenient to have the secondary filter installed in the laundry room - for easier cleaning - but this wasn't practical in my installation without adding a lot more ductwork. Something for me to consider in the future.

The dryer cycles have been reduced by almost one half, 2 hour dryer loads now dry in about an hour - and the automatic dry cycles now work reasonably well - before - the automatic dry cycles never got the laundry dry.

4 Year Update

Still working 100% reliably after 4 years - at least 6 laundry loads a week. The secondary lint filter is a MUST - it is amazing how much lint misses the dryer lint trap. Super impressed with the performance and durability of this fan - no problems at all. 

Sources and Links

I hope you found this post useful. Feel free to ask questions in the comments section below. I answer all questions. If you're interested, you can help support this site by using the following links to Amazon.com in the United States.

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BMW 535xi Touring E61 Tailgate Wiring Harness - SenCom Repair Kit Installation

My BMW 535xi Touring is a 2010 model manufactured in March, 2009. Almost 6 years old with 120,000km. Last summer my remote locking failed – and it wasn’t the diversity antenna module under the rear spoiler, so I suspected wiring issues. I took it to the dealer to have them check it out – and they charged me about $500 to re-splice about 6 broken wires on the right side hinge harness. Since they didn’t insert a repair section – I was sure that this problem was going to reappear, and from what I’ve learned on the forums, I decided to try out the Sencom repair harness kits – with silicone insulated wire for better protection from repeated flexing, particularly at low temperatures.

Melted rear window defroster ground wire (far left) and cracked tailgate lights / locks ground (far right)
This fall – at the onset of winter – I noticed my rear window defroster wasn’t working. I suspected a broken wire in the defroster circuit, so I knew it was time to get at the harness repairs.

I ordered the kits through Autoteilemann.de – very quick and easy and the DHL shipping they quoted included all the taxes, duties and brokerage charges. It took about a week to receive the kits. I ordered 3 to be able to do a complete harness replacement – left and right. There is the kit for the right side harness, and 2 kits for the left side harness – one for the electrical wiring, and one for the antenna cable and windshield wiper fluid tubing.

Left side SenCom Kits Antenna Cable and Washer Tubing - P/N ANT0612 (left) and Tailgate Harness P/N 2016062 (Right)
The kits came with everything required for installation – all the butt crimp connectors, heat shrink tubing where required, new terminals for the defrost attachments on the rear window, terminals and terminal housings for the antenna cable splice and diversity antenna amplifier attachments, washer fluid tubing and barbed tubing splice fitting, and the rubber boots for the tailgate wiring pass through on the left and right sides of the rear window – pre-installed on the wiring loom.

Crimps, Antenna Connectors and Shells, Heat Shrink, Tubing Connector supplied by SenCom with the Left side kits
In preparation for the job – I only had one tool which I needed to add – a crimper for the very small insulated crimp connections. I picked this up at an electronics supply store. Otherwise, for tools, I used a Klein stranded wire stripper (red handled) for all the wire stripping, and an insulated channel lock multipurpose crimper for the standard red, blue and yellow insulated butt crimp connectors.


Crimper for very small gauge crimps (Top left), Klein Wire Stripper (Top right), Channel Lock Crimper for standard Red, Blue, Yellow Crimps (Bottom)
 I heat shrunk all the connections under the rear spoiler around the diversity antenna amplifier to ensure no moisture would get at any of the connections, so the heat gun came in handy there. When doing both sides – you’ll have about 120 wires to strip over the job – so make sure your stripping tool is sharp and in good condition.

I followed the Sencom video on Youtube to guide me through the process – very thorough. Here's a good tip - when the instructions come up in the Youtube video in german text - use your iPhone or Android Google Translate App to translate this text immediately - I was really surprised at how well this worked. The translation was never perfect, but you could get the idea fairly quickly.

Google Translate App is your friend with the German language text in the SenCom video
Start by opening the tailgate and opening the window glass first, then by disconnecting the battery negative post. I waited for the car to go to sleep mode prior to disconnecting the battery – about 10 or 15 minutes. I placed some small rags in the catch for both the tailgate and the window to prevent them from latching during the job.

Rags under the window and tailgate latches will help keep you moving - so you don't have to manually unlatch these if you accidently let them close. You'll be opening and closing the glass and tailgate many times during this repair, especially if you're doing both sides.
I started on the right side – removing all the trim panels per the Sencom video exposing the harness between the tailgate and the windows. I also made sure to let the car warm up in the garage overnight - so that the plastic and wiring wouldn't be cold and brittle.

A trim removal tool will help keep you from breaking the plastic.
When it came time to remove the curved black wiring supports in the hinge – I used a piece of wire coat hanger to push the pins out of the plastic clips retaining the wiring supports – makes removing these clips much easier.

Mini screwdriver worked on the outside hinges to remove the locking pin of the clip holding the black wiring guides
A short piece of wire coat hanger was flexible enough to get at the inside hinge pins - where the screwdriver couldn't access
The trim removal tool was perfect for removing the clips once the locking pin was pushed out
Removing the wiring guides was a bit tricky - using a rag to help protect the paint was a good idea when coaxing the wiring guides out from inbetween the tailgate and glass hinges. It can be done without loosening the bolts on the metal hinges.
Removing the black wiring harness guides - protect paint with a shop rag
Plastic storage container for keeping trim hardware in the order of removal - makes replacing the hardware much easier as you put everything back together in reverse order
Cut the old harness, splice in the new harness on the right side at the tailgate – then remove the speaker in the roof just ahead of the window hinges to access the harness on the inside of the car.
Carefully separate the OEM cable boot from the cable wrapping, and slide up and out of the way
Cut the harness - 10cm / 4" of free cable gives you lots of space to perform the splices
I upgraded the larger gauge splices (blue size) with heat shrinkable crimp connecters that I had on hand
All cables crimped on the right side talegate harness - and waiting to test. Note the number labels on some of the wires to uniquely identify the conductors in the SenCom harness that have the same gauge and color
Pull the old harness through the hinge area, cut the old harness out leaving at least 6” of the old harness to give you space to make connections in the speaker area. Pull the new harness through the wire boot underneath the speaker area, and make all the splices in the speaker area.
Both right side SenCom harnesses pulled through the body cable boot up from behind the inside rear speaker - I used electrical tape on the SenCom harness to make pulling the harness through the boot go easier. Then I removed the electrical tape to perform the splicing
Then go on to do the same for the harness running under the rear spoiler in the diversity antenna amplifier area. The connections under the spoiler are where I ran into a slight issue – one of the wires is brown with a very thin blue line – I mistook it as a ground wire and didn’t track it in my splicing. I had to go back, cut the splice I had done inside the car to identify this wire to the other end of the harness in the diversity antenna area.
Right hand side cable splicing in the speaker opening.
Harness Splicing Complete on the Right Side
A good trick for working with the factory harnesses after you've removed the adhesive tape wrap - is to remove all the residual gum from the wires with Goo Gone before starting the splicing. This will help keep your hands clean during the crimping.
All the ground wires – straight brown with no stripes in the factory harness – can connect to any other brown wire of the same gauge in the harnesses – you don’t need to match them to the same ground wire exactly. Otherwise – obviously – all the colored wires need to be connected correctly. The Sencom harness has a series of wires of the correct gauges but some wires are duplicates and you’ll need to track the duplicate colored wires with a continuity meter – so that you can identify them individually and track the connections. To get this straight – for each harness I cut and spliced – I wrote out a list of every wire – primary color and stripe color, and matched it with a particular color in the Sencom repair kit – e.g. Red wire no. 1, Red wire no. 2., White wire no. 1., White wire no. 2. Then when I made the matching connections at the other end of the harness – it was simple to get everything matched up correctly.

With the 2 harnesses completed on the right side – I moved over to the left side and followed the same method for the tailgate wiring harness, then did the diversity antenna cable / washer fluid circuit / defroster ground wire harness. This is where I found that my defroster ground wire had completely melted through.

To splice the antenna cable – Sencom provides you with a matching pair of male and female OEM style RF connectors – which were fairly straightforward to install. You have to strip the antenna cable in three stages – the outer cable insulation, the inner shield wire, and then the signal conductor insulation. I judged the strips and cuts based on the old connector – and on the female conductor, you need to crimp on a special, tiny, female signal conductor pin. A bit tricky. I managed to get this right – eventually proven by good radio reception and lots of channels when I got everything back together and tested.
Preparing the OEM side Antenna cable for crimping the RF connector
Female terminal crimped to the center core signal wire
Shield Body Crimped over the female terminal / ready for the plastic terminal housing
Female RF Connector with Female Signal Conductor - Gold Color
Once everything was reconnected – and prior to reinstalling any wire guides or trim panels, I reconnected the battery and tested everything. Signals, brake lights, parking lights, reverse lights, license plate lights, defroster function, radio, central locking, cargo cover release, tailgate release, window release. Everything worked perfectly the first try. No fuses blown.
Test all functions prior to re-installing the rear spoiler, or replacing any of the harnesses or trims.
So then – I disconnected the battery again just to avoid any possibility of a short circuit while replacing wires, and tucked away the wires and reinstalled the trim. The wire guides next to the hinges were a bit tricky to get back together, but I got everything clipped together and tightened the guides with a set of pliers so they would hold together firmly. I touched up any small scratches on these guides with a black Sharpie, so I looked like new when it was all back together.

I pulled the new harness through the boots in the roof just forward of the hinges so that there would not be too much slack in the harnesses ahead of the hinge wire guides – so the harness would not be able to be pinched in the hinges. Then I double checked the opening and closing of the tailgate, window and made sure the harnesses were moving freely without pinching. Then – tucked the splices up underneath the speaker openings, replace the speakers and trims, and reconnected the battery.
So – with the repair completed, I noticed that my remote locking / unlocking range became much better. I was down to being able to lock or unlock the car within only about 10’ of the tailgate. If I was at the front of the car, I couldn’t even unlock it. The broken ground connection for the defroster circuit may have been the cause of the lack of range of the remote locking circuit.

Conclusion

Radio reception was excellent, with lots of channels and maybe more channels than I had before (better reception?). It also seemed like comfort access was working a little bit better as well.
Repair time – about 12 hours total. 4 hours the first day, and 8 hours straight the second day from start to finish. Hopefully I won’t have to go back into this for the entire time that I own this car. This is clearly a design deficiency, hopefully BMW corrects this in future variants it builds with tailgates. 12 hours is a lot of time to spend on this – but I love the car and hope to keep it for a while (hopefully until BMW imports a future 5 series touring to North America….)
SenCom Wiring Harness Kits
Right and Left Side Wiring Harness Part Numbers
Left Side Antenna Cable Part Number

4 Year Update

I've been running this repair for just over 4 years now - and it's been solid. No futher issues, no problems with any of the tailgate lighting or functions. Rear window release and defrost still working great. All good. Impressed with the quality of these kits. 

Sources and Links

The Sencom kits were a bit expensive to have shipped from Germany with duties, taxes, brokerage, etc. but the kits are excellent quality. I can confirm the kits work fine with North American vehicles (535xi Touring LCI e61) with one spare conductor on the right hand side, and one spare antenna cable on the left hand side. Thanks to Sencom for supporting us with a quality repair kit and an excellent instruction video. Thanks to everyone on the various BMW forums for your support, I've gotten lots of good feedback on this post and I appreciate it.

Sencom 2016061 on eBay
Sencom 2016062 on eBay
Sencom Ant0612 on eBay.

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