Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).

Rinnai Gas Heater (FTR557) node

brendanl last edited by brendanl

Opto isolated from existing Rinnai controls and feedback.

All documented at https://techconz.com/smart-home/rinnai-gas-heater-ftr557/

Still to establish some OpenHAB rules for it, but will likely be Mon-Fri @ 7am when < 11 degrees outside, turn on.
Reply Quote 1
1 Reply Last reply

1
Posts

652
Views

Suggested Topics

Welcome
Announcements • • hek

8

0
Votes

8
Posts

3221
Views

@NotYetRated Hope you'll find good uses and a fun time while building your sensors.
HVAC Controller
My Project • • Michael Link

3

1
Votes

3
Posts

28
Views

We are of like minds, Don't like the cloud based controls (that's another discussion). In my case I have a Bryant/Connex system, heat pump, variable speed fan and 4 zones. There's a lot going on: the 4 zones creates 16 profiles. The fan speed for a profile will depend on the indoor and outdoor temperature. The thermal fluid pump also has to be controlled. A profile will have an optimal air pressure, so there's a sensor there. The controller works just fine not being connected to the cloud. But I want to set the parameters remotely, Bryant/Connex can do this. I also wnat the status of the various actuators and sensors to show up in Home Assistant. The signals sent over the RS422 are proprietary. My plan was to reverse-engineer the signals. After doing this I'll have to experiment to get the right mix of air pressue, fan speed and thermal fluid flow for each profile. I'd like to do the same for my AO Smith heat pump water heater. I'd like to follow your progress. OSD
Auxiliary Loads and Mains Charger Controller for my Smart Mobile Home
My Project • • fsgraz

1

2
Votes

1
Posts

22
Views

No one has replied
Halloween Lights
My Project • led strip light ws2812b • • KevinT

1

3
Votes

1
Posts

24
Views

No one has replied
A low cost energy meter
My Project • • OldSurferDude

7

1
Votes

7
Posts

44
Views

@OldSurferDude yes, you are correct. this sensor is capable of 50A continuous, which safely I would make it working at 40A max., but for such an important load as in your case I would go for a beefier one, like the ACS75x, 77x, but at this point I would also change the node's form factor for space and insulation reasons. On my application on the RV I have a max. curr. of 13A running on a AWG14-16 cable (European rules for RVs), so I did not ask myself too many questions beside, of course, safety. About the signal, it will be a sinusoidal signal swinging around Vcc/2. Vcc can be easily measured internally on the ATmega328. On all my DC sensors I measure Vcc at every loop, just before measuring the ADCs. Honestly, when the space is not an issue like in my RV, I would rather use a ring core current transformer, and I would get rid of noise, response time, power dissipation, but over all no need to cut any cable. Long story short, it has been a nice experiment and I used it for 6 months, and then I switched back to my RF-NANO based RS485-Modbus - Mysensors bridge connected to an off-the shelf power analyzer. Just for fun I attach a pic of my 12Vdc sensors installed on my RV. Forgive me for the spaghetti wiring on the right side, but this is an area that needs improvement.
Alexa Fauxmo - Mysensor Bridge Gateway / BLE - Mysensors Bridge Gateway
My Project • • fsgraz

1

2
Votes

1
Posts

11
Views

No one has replied

Rinnai Gas Heater (FTR557) node

Suggested Topics

Welcome
Announcements • • hek

HVAC Controller
My Project • • Michael Link

Auxiliary Loads and Mains Charger Controller for my Smart Mobile Home
My Project • • fsgraz

Halloween Lights
My Project • led strip light ws2812b • • KevinT

A low cost energy meter
My Project • • OldSurferDude

Alexa Fauxmo - Mysensor Bridge Gateway / BLE - Mysensors Bridge Gateway
My Project • • fsgraz

0
Online

11.4k
Users

11.1k
Topics

112.7k
Posts

Rinnai Gas Heater (FTR557) node

Suggested Topics

Welcome Announcements • • hek

HVAC Controller My Project • • Michael Link

Auxiliary Loads and Mains Charger Controller for my Smart Mobile Home My Project • • fsgraz

Halloween Lights My Project • led strip light ws2812b • • KevinT

A low cost energy meter My Project • • OldSurferDude

Alexa Fauxmo - Mysensor Bridge Gateway / BLE - Mysensors Bridge Gateway My Project • • fsgraz

0Online

11.4kUsers

11.1kTopics

112.7kPosts

Welcome
Announcements • • hek

HVAC Controller
My Project • • Michael Link

Auxiliary Loads and Mains Charger Controller for my Smart Mobile Home
My Project • • fsgraz

Halloween Lights
My Project • led strip light ws2812b • • KevinT

A low cost energy meter
My Project • • OldSurferDude

Alexa Fauxmo - Mysensor Bridge Gateway / BLE - Mysensors Bridge Gateway
My Project • • fsgraz

0
Online

11.4k
Users

11.1k
Topics

112.7k
Posts