Proliphix nt120h how to connect to a Vaillant ketel

Forum about Opentherm, Hvac, House heating, Boilers

Moderator: hvxl

User avatar
Phaeton
Advanced Member
Advanced Member
Posts: 573
Joined: Wed May 19, 2010 12:44 pm
Location: Wassenaar
Contact:

Proliphix nt120h how to connect to a Vaillant ketel

Post by Phaeton »

Last week I bought a Proliphox nt120h thermostat. This is a on-off thermostat, which needs to be fed with 24v from the ketel. At this time I use a ‘slimme/smart thermostaat’ made by Icy. My kettel is a Vaillant VC254/3.

I don't know how to connect the new thermostat to the kettel. Can you guys help me out? Right now the Icy Slimme Thermostaat is connected to the pins 3 and 4, with a 220R/5W resistor between pins 4 en 5.

I found the manuals of these appliences, but the confuse me a little bit. The manuals can be found here (some are dutch):

Icy Slimme Thermostat (oold one, to be replaced): http://www.icy.nl/sites/default/files/S ... 2011-3.pdf
New Proliphox nt120h thermostat: http://www.proliphix.com/support-family ... series.htm / http://www.proliphix.com/Collateral/Doc ... 0Guide.pdf
Kettel: http://www.vaillant.nl/stepone2/data/do ... 0254-3.pdf

Which pins do I use in the kettel and which pins do I use for the proliphix? thank you very much!
groeten,
Harry
Bwired
Administrator
Administrator
Posts: 4704
Joined: Sat Mar 25, 2006 1:07 am
Location: Netherlands
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Bwired »

User avatar
Phaeton
Advanced Member
Advanced Member
Posts: 573
Joined: Wed May 19, 2010 12:44 pm
Location: Wassenaar
Contact:

Post by Phaeton »

Yes i did, in that topic I found out which pins to use for on/off.

but the 120h cannot receive its current from a poe (like) adapter. It uses current from the kettle. All posts online explain the POE version very clear, but when it comes to the 'h' version things become unclear for me.
Digit
Global Moderator
Global Moderator
Posts: 3388
Joined: Sat Mar 25, 2006 10:23 am
Location: Netherlands
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Digit »

The Proliphix manual you found says:
"This guide describes how to physically install the Basic Series (NT10e and NT20e),
the Professional Series (NT100e/h, NT120e/h, NT130e/h, NT150e/h, and NT160e/h) and ..."

Why can't you follow the instructions? Where do you get stuck.
Pins 3,4,5 doesn't say anything to me. And I'm not really that eager to start searching what those pins stand for all by myself; I always pick the wrong manual first :wink:
So what are those pins used for? Maybe if you tell a bit more, someone can help.
Bwired
Administrator
Administrator
Posts: 4704
Joined: Sat Mar 25, 2006 1:07 am
Location: Netherlands
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Bwired »

probabaly the same pins for switching the Hvac, proliphix does not change that often
are you sure it can get the current from the hvac
I USA they have a complete different system i guess

but to switch your hvac you dont need the normal 2 wires, i switched based on potential free input, two other hvac connectors

I connected to relay output RH and W1, this relay controls your Hvac system,

I think Digit had the same?
User avatar
Phaeton
Advanced Member
Advanced Member
Posts: 573
Joined: Wed May 19, 2010 12:44 pm
Location: Wassenaar
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Phaeton »

Digit, I understand. Since this is bugging me for a couple of days now and I have the feeling you guys think I didn’t do my research :D Let me clarify. (LOL)

It could very well be that I think too much about this subject and therefore overanalysed this. And that the answer is simple.

First of all I read the information about the Proliphix on this forum and other placed on the net. I off course read the topic where you and Bwired explained quite a lot about the thermostat. In that topic I learned that the RH (Red Heat) and W1 (white heat) output of the thermostat can be connected to the Potential Free input of the Vaillant. On the Vaillant the potential free input is pin 3 and 4 without a restistor to pin 5. So far, so good.

My Thermostat has the ‘h’ marking instead of the ‘e’ Marking. Meaning that the thermostat doesn’t get its current from PoE but from the Vaillant Kettle. This is where I get confused and where my situation differes from yours.

Right now the vaillant is connected to a Slimme Thermostaat which gets its current from the kettle. This is done by using the samen (3 and 4) pins on the Vaillant but with the difference that there is a restistor placed between the pin 4 and 5. My guess is that it is placed there to have continous stream of current which allows the thermostat to run on 24v instead of using batteries.

The Proliphix thermostat has quit a lot of connections opposed to the Slimme Thermostat. I can rule out some connections which I will not use (2nd stage heating, cooling and fan). The remaining connections are: [r,rh] [r,rc] [c] [w,w1]. In the manual of the Proliphix I found (on page 4) that I have to use one of the first two connections for the +. Which one got me confused so I tried to identify the connections by searching the net. With this information I found out these stand for: [Red, RedHeat], [Red,RedCool], [Common], [White, White1].

With that information I now know that it seems logical to use the [R,RH] connection and the [C] connection since [RH] is the one is meant for heating and common because with Neutral I have a good +/- connection.

But… this isn’t even close to the way you and bwired connect the thermostat and now I’m lost…. I probably get current for the thermostat but I don’t see how the thermostat now switches the kettle on and off. Beside that I’m not 100% sure and I don’t want to use my Proliphix as an expensive guinea pig ;-)

I hope I clarified my confusion for you and you can help me a little bit further?
groeten,
Harry
User avatar
Phaeton
Advanced Member
Advanced Member
Posts: 573
Joined: Wed May 19, 2010 12:44 pm
Location: Wassenaar
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Phaeton »

sitting in the bus back from work to my house I was thinking... Might help you guys (the experts) a little bit in helping me?

My current thermostat uses only two wires. Could it be that the current thermostat uses 2 wires because the wires are used for both power and the relay? let me try to explain my brainfart. Because of the low usage of the thermostat and because there is a resistor between output 4 and 5 the vaillant doesn't turn on even though the circle of electricity is complete. When the thermostat asks for more heating the relay closes and there is less resistance and therefore the vaillant kettle turns on.

If this is the case. I might need three wires to get the proliphix to work? two wires to have the proliphix have its energie (I guess that should be RH and C). and one wire to W1. Since this is the relay to turn the heating on.

I think we're safe to say that RH is a '+' wire, current is '-' . Since you guys use RH and W1 we can say W1 is a '-' wire.

Connected that way there is alway current passing through RH and C to feed the Thermostat. And when the relay closes the amount of current passing through turns on the Kettle.

could it be?
groeten,
Harry
Akatar
Senior Member
Senior Member
Posts: 1134
Joined: Thu Nov 22, 2007 12:25 am
Location: the netherlands

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Akatar »

page 8:a For “h” thermostat models only, the 24VAC common must be in the same AC phase as the 24VAC
source (RH or RC). If the thermostat is connected to RH only, or RH and RC then C must be the RH
common. If the thermostat is connected to RC only then C must be the RC common.

i think you need three wires.
User avatar
Phaeton
Advanced Member
Advanced Member
Posts: 573
Joined: Wed May 19, 2010 12:44 pm
Location: Wassenaar
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Phaeton »

Then i have to find out which of the two connectors of the vaillant i need to put the two common wires in. I'll have to see if Google can help me further.
groeten,
Harry
Akatar
Senior Member
Senior Member
Posts: 1134
Joined: Thu Nov 22, 2007 12:25 am
Location: the netherlands

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Akatar »

you need a "multi meter".
meassure pin 3 and 4, that can be 24vac or 24 common (3 or 4)
the klik aan/uit thermostat returns it from pin3 to pin 4

it is possible that 2 wires go to the thermostat 24vac and 24 common and 1 wire back from the thermostat to pin 3 or 4.

try at you're own risk
User avatar
Phaeton
Advanced Member
Advanced Member
Posts: 573
Joined: Wed May 19, 2010 12:44 pm
Location: Wassenaar
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Phaeton »

Thanks, I'll try but dont think i'll risk it :D
I've thought of an alternative which might be easier for now:

I'll buy a 24v adapter and use this to power the proliphix. Then i'll use the potential free input (3/4) on my vaillant and use the w1 and rh to connect the thermostat to it. This way i wont break stuff.

Later when a company cleans my vaillant i'll ask them to connect the thermostat.

Everybody thanks for the help! When the company connects the thermostat i'll post it here for future reference.
groeten,
Harry
Bwired
Administrator
Administrator
Posts: 4704
Joined: Sat Mar 25, 2006 1:07 am
Location: Netherlands
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Bwired »

Thats the setup in my topic, other settings i did not get it working on my hvac.
Of course i used the poe, but tried other as well.
Agree be carefull, you could do some harm :-)
Digit
Global Moderator
Global Moderator
Posts: 3388
Joined: Sat Mar 25, 2006 10:23 am
Location: Netherlands
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Digit »

2nd try, forum went down in the middle of the 1st...
I made some pictures recently when I removed my NT20e, as you can see I also use RH and W1:
DSC_7602_600.jpg
DSC_7602_600.jpg (192.93 KiB) Viewed 14156 times
And you're right, don't take any risks you don't want to, that's better for your equipment :wink:
User avatar
Phaeton
Advanced Member
Advanced Member
Posts: 573
Joined: Wed May 19, 2010 12:44 pm
Location: Wassenaar
Contact:

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Phaeton »

Thanks. With your experiences in mind i'll follow the path with a seperate adapter. When the HVAC specialist drops by i'll post how he connects the thermostat. Since the 'h'. Version is still available on ebay it might help some (new) forummembers. Thanks all!
groeten,
Harry
Post-IT
Member
Member
Posts: 448
Joined: Sat Feb 28, 2009 12:01 am
Location: Netherlands (Rotterdam)

Re: Proliphix nt120h how to connect to a Vaillant ketel

Post by Post-IT »

I also use W1 and RH, however I noticed it is also important to use the correct settings for the on/off to work.

On the advanced settings page:
HVAC system type: Fuel burner
Heat control: H1
Cool control: Disabled
Post Reply

Return to “Hvac, Heating Opentherm Forum”