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Joined on August 12, 2009

Last Post on August 13, 2014

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Exp tank

@ August 13, 2014 6:59 PM in Rinnai cycles by itself

I would move the exp tank to the cold inlet side and that should solve the problem. You don't really need an expansion tank unless you are heating a storage tank or using a small tank for recirc.or if your local code requires one.

sure can

@ July 9, 2014 11:10 PM in Rinnai r94ls Tankless and Propane?

You need a new gas manifold which includes the orifices and you need an LP air damper to make this happen. This work should only be done by a trained profession that knows how to use a manometer to adjust the gas valve pressure and make sure you have the right inlet pressure for the conversion. While you have the gas manifold off it will be a good time to clean the burners, heat exchanger and flame rod and electrode.

Swirl plate

@ May 24, 2014 4:00 AM in MunchkinT80 Error codes

Sounds like a bad swirl plate on the inducer. Its been a few years since I've seen that problem and tech support can walk you through it but they probably won't because you're not a contractor. Liability ya know.

ok boiler

@ February 27, 2014 9:58 PM in lennox gwb8-150e-2

Its an ok boiler, not the most efficient but not a lot of things to go wrong. The boiler is made by Dunkirk for Lennox and should be reliable if its installed correctly. .Being a Lennox I bet who ever who quoted the boiler is probably more of a forced air furnace company so be careful. I would make sure whoever speced out that boiler did a heat loss calculation to make sure its sized right since that's a fairly large boiler. I would try to get a few estimates and whoever does a heat loss calc, I'd lean toward them.

No advice

@ February 26, 2014 6:52 PM in Adding automatic vent damper to old cast iron boiler?

I can't give advice on steam boilers because they're really rare where I'm at but I'm interested in your opinion.

Don't waste your money

@ February 21, 2014 9:09 PM in Adding automatic vent damper to old cast iron boiler?

You will never recover the money you spend putting in an auto vent damper on a boiler that age. In my neck of the woods it would cost the customer $XXX to $XXXX to have it installed by a HVAC contractor. Have the customer save their money and invest in a new mod con rather than invest their hard earned money on a 30 plus year old boiler.

Loose burner

@ February 21, 2014 8:56 PM in Munchkin Boiler Problem

On the older Munchies of course you have to clean the heat exchanger. The recurring F09 is probably the burner screws are loose.The rectification signal carries through the tightly grounded burner. You will need a big phillips screwdriver and I'm not sure of the tip size to get it retightened without stripping the screw heads.. You will also need a new burner gasket, a Scotchbrite pad or sandpaper.Remover the burner and scrap off the bottom of the burner flange and where it mounts to the door. Clean the screws really good especially under the head where it mates with the burner flange and reassemble and that should take care of your F09

installation manual

@ January 5, 2014 8:54 PM in New Lochinvar Knight Questions / Concerns

Both pumps should be moved. The primary needs to be pumping into the boiler, move it to the other side. The secondary needs to pump away from the exp tank as you have it it green. Moving the primary pump to pump into the boilerwill ensure the primary loop and secondary loop will flow against each other at the closely placed tee's. Make sure the make up water is tied into a tee below the exp tank. The DWH tee,s need to be on the primary, one in the supply, one on the return. Really, all the contractor needs to do is read and look at the pictures in the installation manual. The pump selection info is there too. You just need to do a bit of math to figure out the secondary pump size.

press switch

@ December 17, 2013 9:35 PM in Heatmaker Boiler Firing Intermittently

Pressure switch problem = clogged heat exchanger


@ December 16, 2013 1:11 AM in Heatmaker Boiler Firing Intermittently

It could be a lot of things. A bad stack switch, operating limit, safety limit, clogged coil, cross contamination, control. I would guess a clogged heat exchanger if its never been cleaned in over 20 years. Its not hard to clean, you might need a new ignitor gasket. The blower and flame trap gaskets will probably be ok to reuse. But really, you've gotten your money's worth at 21 years old and I would consider upgrading and I'd recommend the Triangle Tube Excellence.


@ December 11, 2013 7:38 PM in Recommendations for new flue gas analyzer- URGENT!

i've been really happy with the Bacharach Fyrite® InTech and use it 4 to 5 times a day for the last 3 months. I've used 'em all and wanted something really affordable and so far so good.


@ November 27, 2013 9:23 AM in honeywell ignition module S8600H

Make sure you have a solid ground and I think you'll find your problem. Not familiar with Raypac stuff but isn't that a pool heater?

Not sure yet

@ November 18, 2013 10:10 PM in non condensing combi heaters?

Not sure yet about the load required. The owner just mentioned she's like to consider replacing the 17 year old Heatmakers and 13 year old Endurance's late Friday afternoon. Before I go back and do a load calc, I'd like to have an idea of options when I'm in the apartments. It's all baseboard with one bath in a little over 600 square foot with new windows so it can't be over 20K. I might even be able to get creative with the condensate removal but don't think so. Did I mention the boilers are in a closet in the bedroom, so it has to be sealed combustion. Thanks for the input so far.

non condensing combi heaters?

@ November 17, 2013 2:03 PM in non condensing combi heaters?

I have a situation where I've been working on Heatmakers and a couple early Laars Endurance boilers in an 8 unit apt complex doing the DHW and baseboard. Actually the Heatmakers have held up better than the Endurances but the owner wants to replace all of them and she doesn't want to go with Endurance because of all the problems. Installing a central boiler is out of the question because of all remodel work it would take to run the piping with the units occupied. Also running a condensate discharge line off a pump for each apt. would require extensive work and remodeling so something like the Excellence would be costly. Is there any non condensating combi units out there that may work.?

current sensing relay

@ November 14, 2013 12:09 AM in Trouble wiring humidifier

Just wire a 24v relay off your SSU to a current sensing relay clamped on a lead to the blower and then to the humidistat and back to the relay. Don't make it overly complicated.

air lock

@ October 23, 2013 6:14 PM in Triangle Tube Prestige Excellence 110. NO HEAT!

I guess you didn't read my post but if the control is at 6186 the heat demand is at the setpoint which means its not pumping. The pump is obviously working since you have hot water so you need to purge your heat loop and put that expansion tank on the return or you'll have this problem at the start of every heating season.


@ October 23, 2013 6:03 PM in Press Tools - Ridgid vs Milwaukee

I like the Rothenberger 15800 ROMAX 3000 or should I say love. It is the only tool I've used that doesn't tweak the piping out of alignment when you press it. I tried Milwaukee and the Ridgid and had a hard time keep my pipe straight when I pressed and the first time I used a Rothenberger it felt right. Good battery life too!

No pex

@ October 21, 2013 9:40 PM in PEX for commercial boiler fill line

Type L copper only for commercial where I am.

Need to know

@ October 21, 2013 10:52 AM in Humming coming from inside boiler

Is it humming any particular song? If it starts whistling the theme song to the Andy Griffith show you have a problem. Seriously, like Ironman said its probably a transformer.

Get a pro

@ October 21, 2013 10:42 AM in Lennox G23 popping limit switch after a few minute of firing

Time to call a professional immediately. Could have a cracked heat exchanger and a dangerous situaltion on hand.

air lock

@ October 21, 2013 12:00 AM in Triangle Tube Prestige Excellence 110. NO HEAT!

Its airlocked. Make sure the heat side expansion tank is on the return like the install manual says. When it goes into DHW, the 3 way will isolate the expansion tank if its on the supply using zone valves. This will cause the interior tanks pressure to go way up and the relief valve will blow causing the air lock the first call for heating of year. Like the installation manual says, pipe the expansion tank on the return which is common via the three way to the internal tank.

I've seen it a couple time out in the field on no heat calls with the Excellence.


@ July 10, 2013 11:21 PM in Best Location ModCon Low Water-

I've install dozens of Triangle Tube Solo and Lochivar Knights using the cross method on top of the wall hungs without a hitch. If you pipe your primary loop out of the bottom and have your closely placed tee's or LLH above the boiler you could tee it in slightly about the heat exchanger. But that scenario happened once before I went exclusively with LLH's. Just remember for the PRV you need to 90 up and install the PRV so your discharge is horizontal.

I've been away from the wall for a couple months working on AC during this hot Colorado summer.  Wish I could do hydronics full time. Did I miss anything?
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