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Jake48

Jake48

Joined on September 28, 2011

Last Post on July 28, 2014

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New Clue

@ July 28, 2014 1:41 PM in Vitodens 100-W Cycles But Won't Ingite, No Error Message

Ok Chris found the pressure switch and when I cycled on felt water flowing through so not that. However, I realized when it cycles, it is actually heating up raising the unit temp from 75 to 82 then shuts off. So that means it is actually firing and lighting, correct?

So why does it keep shutting down?

No Flow Switch

@ July 28, 2014 12:21 PM in Vitodens 100-W Cycles But Won't Ingite, No Error Message

There is no part in the manual called "flow switch"

Flow Switch

@ July 28, 2014 11:35 AM in Vitodens 100-W Cycles But Won't Ingite, No Error Message

Can you elaborate, I don't know what you mean?

I just got off the phone with Viessmann tech service and they think it is the gas valve.

Vitodens 100-W Cycles But Won't Ingite, No Error Message

@ July 28, 2014 9:47 AM in Vitodens 100-W Cycles But Won't Ingite, No Error Message

My 2007 Viessmann Vitodens 100-W30 cycles continuously but won't ignite. There is no error message. This is the first time I have had a problem with this unit in which there was no Fault Code (error message).

In past I had stuck flapper in 2010 but got F-5 fault.

In 2011 I had low pressure from bad feed reg valve but got Low pressure fault.

The pressure is fine this time.

Is it a stuck flapper again? Is so, why no error message?

Anyone know what might be wrong?

Primary Boiler Pump Failure?

@ July 11, 2013 6:29 PM in Primary Boiler Pump Failure?

Success!

It was in fact the primary pump.

I replaced the pump and the system is working fine now.

I bought the Taco 007-F5 pump on Amazon for $84.99 and "free shipping" and no tax. It took 5 days to arrive. No hot water for 5 days = angry wife and kids. LOL

To install, I killed the main power switch to the system. Then I shut the valves above and below the pump so I didn't have to drain the system. Disconnected the wires by cutting the power supply wires (they were crimped on to the pump wires). Unscrewed the ground wire. Then I cut off 1/4" of the coating on the wires to expose them. Unbolted the pump and a little residual water in the pump came out, about 1 cup. Then I put the gaskets in the grooves of the pump flanges and carefully slid the pump in place (motor must be parallel to the ground) while ensuring the gasket stayed in place. I hand tightened all 4 nuts and bolts. Then I wrench tightened them. Then I connected the ground wire to the pump using the screw on the pump. Then I connected the white power wire to the white pump wire. I connected the colored power wire (black) to the colored (yellow) pump wire. I had no crimps and no crimping tool but I had the screw on wire caps so used those to secure the wires together. Then I closed up the wire box. Then I opened the upstream and downstream valves on the pump and heard a quick little rush of water filling the pump cavity.

Then I threw the power switch on. The pump immediately started and so did the hot water pump. The united ignited and interestingly I didn't have to hit the reset button as I expected to have to do. The unit heated up, from 80 to 174 and stopped there where it is supposed to, pressure remained constant at about 14 PSI. This time the main circulation pipes all got hot and I could hear a faint hum from the pump. I checked for leaks and there were none. Once the hot water tank was hot the hot water pump stopped and the boiler then cycled off so everything is working fine!

One minor concern was when took the cover off the Vitodens 100 I noticed a small puddle in there. I wiped it up and saw no leaks. I am going to assume that this was caused by when I shut the unit down it cooled from 200 degrees to basement temp of 60 degrees and sat there for 5 days so condensation formed on the outside of the pipes and then dripped down.

Someone asked me to use an amp to test the old suspect pump but I don't have one.

Someone suggested replacing the cartridge instead of the whole pump but I was told that would cost a big percentage of the 84 bucks I paid for a brand new pump.

Thanks for your help people!

Primary Boiler Pump Failure?

@ July 6, 2013 6:20 PM in Primary Boiler Pump Failure?

They won't be of any help. It is an F2 fault, which their manual says 1) check pump operation, 2) check water level (like I said seems to be full of water) and 3) vent system of air (don't think that is the problem). I am looking for someone who knows whether this is a pump failure or not.

Primary Boiler Pump Failure?

@ July 6, 2013 6:10 PM in Primary Boiler Pump Failure?

I think I have a primary boiler pump failure. The pump is getting really hot but the impeller is not turning (i.e. it is not making the regular humming sound when it is pumping). So the when the boiler is overheating and faulting off due to no circulation. The temperature and pressure soars in the boiler than shuts off showing F2 on the vitodens 100-W. The upstream and downstream pipes to the pump are cold but the pump gets very hot. It is a Taco Cartridge circulater model 007-F5. When I open any of the 3 systems drains water comes out so it is full of water.


Does it sound like a pump failure?

Losing Boiler Water Pressure Gradually over 1 Month

@ September 18, 2012 6:33 PM in Losing Boiler Water Pressure Gradually over 1 Month

The problem has been going on 4-5 months.  What does that mean
Pressure has increased to 18 PSI the past 2 hours so I had to adjust the regulator down again.  It is a pain in the next to adjust to get it just right with this delayed effect.

Losing Boiler Water Pressure Gradually over 1 Month

@ September 18, 2012 12:38 PM in Losing Boiler Water Pressure Gradually over 1 Month

Hang on, after I turned the regulator clockwise their was delayed reaction and the pressure increased to 17 PSI.  So the regulator is working and needed to be adjusted.  Now I have to lower it to get back to 14 PSI.  With the delayed reaction I just lowered it a couple of turns and will have to wait to see where it stabilizes at.

Losing Boiler Water Pressure Gradually over 1 Month

@ September 18, 2012 12:38 PM in Losing Boiler Water Pressure Gradually over 1 Month

Hang on, after I turned the regulator clockwise their was delayed reaction and the pressure increased to 17 PSI.  So the regulator is working and needed to be adjusted.  Now I have to lower it to get back to 14 PSI.  With the delayed reaction I just lowered it a couple of turns and will have to wait to see where it stabilizes at.

Losing Boiler Water Pressure Gradually over 1 Month

@ September 18, 2012 10:37 AM in Losing Boiler Water Pressure Gradually over 1 Month

I have a Veismann 100 natural gas boiler.  It is supposed to be about 14 PSI water feed pressure.  However over a 1 month period it drifts down to 10 PSI.  I open the valve on top of the pressure regulator and let water in and get it up to about 17 PSI but then over 1-2 months it will gradually drift back to 10 PSI.  I have adjusted the regulator valve by tightening clockwise but it doesn't seem to have any effect at all.  My understanding is when the pressure regulator valve fails, it fails high and not low.  I have no aparent leaks and the system seems to be operating fine other than the gradual loss of pressure.  Any ideas to fix this?

Primary Pump On All The Time

@ June 25, 2012 2:15 PM in Primary Pump On All The Time

Ok Chris I think I tried that and it didn't work, but will try again.

Primary Pump On All The Time

@ June 24, 2012 7:29 PM in Primary Pump On All The Time

Yes and I changed the S1 to the position such that the pump should cycle off and not be on all the time and guess what?  It still stays on all the time.  Very frustrating.  The only difference is when I turn off power completely then turn it back on, the pump does shut off and stays off like it is supposed to.  Then when the boiler fires on the pump starts up like it should but it doesn't shut off 10 minutes after the burner turns off, it just stay on indefinitely.  Very frustrating.  I give up.  I have decided that I will just leave it on continuously (like it probably has been for the past 5 years) and pay a little extra in electricity rather than pay an electrician 100 bucks an hours to troubleshoot it and start replacing PM and other expensive parts and have it still not fixed.  Even if he fixes it, the repair cost will be way more than the electricity cost and would take years to pay for itself.  Also note the Viessmann factory setting is set for the pump to be on continuously (see above electical diagram) so maybe this is what the manufacturer thinks is ideal.

Primary Pump On All The Time

@ June 24, 2012 5:51 PM in Primary Pump On All The Time

Chris, yes they are all in the factory position.  So I just moved up the S1 to the top to turn it "on".  I left S2, S3 and S4 all in the factory set down postion which is the "off".  Now according to the table in the right lower corner of the attachment the S1 being up is the"on" position will cause the pump to cycle properly.  So 10 minutes from now that pump should shut off.  I will let you know if that worked.

Primary Pump On All The Time

@ June 24, 2012 5:01 PM in Primary Pump On All The Time

PS when I look at the actual electrical panel, the S1 1-4 are not all quite on the bottom as shown on the attached electrical digaram.  Meaning the black lines on 1-4 of S1 are not on the bottom, they are up a little off the bottom.  Don't know if this means anything

Primary Pump On All The Time

@ June 24, 2012 4:34 PM in Primary Pump On All The Time

Chris I think you may be on to it.  I looked at the vitodens Electrical wiring for the S1 dipstick (which I have attached).  If you look at the bottom right of the page it appears to me that you can use the S1 to set the pump to cycle or be on continuously.  Chris, am I reading that box correct?
Now, when I opened the electrical panel on the unit and looked at S1, it looks exactly like the figure for S1 on the bottom left of the attached page.  Meaning 1 through 4 on the S1 are in the "on" position.  According to the box on the lower right, the on position is supposed to have the pump cycle off 10 minutes after the purge is finished.  Chris am I reading this correct?

Primary Pump On All The Time

@ June 24, 2012 4:01 PM in Primary Pump On All The Time

By the way as you all know the other 3 pumps (upstairs zone, downstairs zone and indirect hot water) are all controlled by thermostats.  What controls the primary pump's on and off is it temperature or pressure or something else.
The reason I ask is the unit's digital display say pressure is 10 PSI and the gage says 15 PSI.  Is it possible this difference is causing the pump to stay on all the time?

Pirmary Pump On All The Time

@ June 24, 2012 3:22 PM in Primary Pump On All The Time

No cut wire and no sign of arcing.  Hot water demand is fine.  someone took a shower a while ago and that hot water pump came on and then off after a couple of minutes.  The primary pump is on all the time.  Are installations ever done to have the primary pump on all the time or would that never be the correct way to set up the system?

Primary Pump On All The Time

@ June 24, 2012 12:59 PM in Primary Pump On All The Time

The unit was installed about 7 years ago and talking to other family members, they don't remember it running all the time so we don't have an installation problem, it sounds like a new problem.  I will check for cut in wires.  Any other possible causes for this to suddenly start running all the time?

Primary Pump On All The Time

@ June 24, 2012 12:40 PM in Primary Pump On All The Time

it sounds like it is suddenly malfuntioning and shouldn't be running all the time.  What could have caused this to happen and what is the fix?

Primary Pump On All The Time

@ June 24, 2012 11:46 AM in Primary Pump On All The Time

I have a Vitodens 100 with low loss header and I have 4 pumps, one for downstairs zone, one for upstairs zone, one for hot water superstore and then the primary pump.
I just happened to notice the primary pump is on all the time.  I know this is dumb but I don't remember if it has always been on and just didn't notice it or there is a faulty switch and now it is on all the time.
Is this supposed to be on all the time or only when the burner ignites and it is supposed to stop a few seconds after the burner runs through its cycle?

boiler temp

@ September 29, 2011 12:41 PM in Vitodens 100 W-30 Boiler Temperature Setting Help Needed

PS JBD, is your boilier a condensing boiler or regular one?  If yours is a regular one, that may explain why yours is off when not in use and mine stay at temperature at all times.
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