Joined on January 19, 2012
Last Post on December 10, 2013
@ November 17, 2013 9:54 PM in Observation about HX designsThey also have higher water volume and lower head resistance.
@ November 17, 2013 9:44 AM in Twin Aerco boilers installed this week. Really like these boilers.John,
How did the controls side of this go? The manual looks pretty cryptic? Is it set as always on or a T-stat.
@ November 17, 2013 9:36 AM in Need help with E8 boiler cascade controller!!The E8 looks like a very powerful and versatile controller. It is also very European. I do not believe that you can wire T-stats directly to it.
What happens if you wire the t-stat to one of the boilers?
As far as sensors go, The E8 will need an outdoor sensor and a manifold supply temp sensor. The others are probably for other applications.
The good news is that the boilers are capable of being controlled via 0-10vdc signals.
If you become fed up with the E8 you could go to a well supported North American company like Tekmar. I would call them before purchasing.
Did JohnnyNY respond? He seemed to like the product.
@ November 16, 2013 11:28 PM in Should I have separate system and boiler pumps?Good to here you have it worked out.
Sometimes slabs have enough mass to act as a bit of a buffer.
I think you should hook up the outdoor sensor. It is just two wires and some settings that you are probably familiar with.
Sometimes the theoretical calculations are out weighed by what really happens in a heating system.
Thanks for the follow up
@ November 16, 2013 10:49 PM in New Construction Tankless HeatingThat is a closed system. That is good.
You are correct that a water heater is not the same as a boiler. You have a budget system. Yes you could upgrade later with a combi boiler.
I have never seen tubing that changes color from red to blue.It is best to not splice the tubing they obviously did.
I am guessing it is potable water tubing with out an oxygen barrier. This is a problem if you have ferrous metal in the system. It is a sign of an inexperienced installer.
Is the tubing in a slab?
@ November 16, 2013 8:05 PM in New Construction Tankless HeatingFirst let's figure out if it is open. There are health issues that go along with that one.
Post some pictures
@ November 16, 2013 8:01 PM in crown boiler bimini120,000 is the input BTU rating. In a high temp application the boiler will likely burn at 84%. That would give you an output of 100,800.
The head loss in the manual gives a very generous boiler piping allowance. I think most installations will use less piping.
There is no reason you have to be at a 20 degree delta at full fire. I would not design for perfection on the coldest day at the expense of over pumping on your typical heating day.
A condensing boiler will have the same combustion efficiency as a conventional boiler at 180 degrees. The overall efficiency will likely be higher because the turn down ratio will reduce short cycling.
@ November 16, 2013 7:41 PM in Twin Aerco boilers installed this week. Really like these boilers.Nice work in a tight space!
I am curious what kind of combustion numbers you are seeing at low fire?
Too the second post, If you start another thread and provide the boiler model and type of zoning, you will get better results.
It doesn't work that well to piggy back a different topic.
@ November 16, 2013 7:35 PM in System LayoutIt sounds like you are doing a ground up design?
The key too maximizing the efficiency of today's Mod/cons is to size them correctly and design for the lowest return water temps you can.
I would start with the water temp you want on your design day and go from there.
You would then select radiators for each of our rooms that will match your heat loss for that space at the design water temp. Somewhere around a 130 degree supply temp would be a good starting point.
Your boiler piping may look a bit different than your father in law is used to. Boilers used to be piped to prevent condensation, now we encourage it.
You can generally go by the installation instructions from the boiler manufacture.
Every time I see a post like the second one in this thread, I appreciate the fact that I don't live in a place where people talk to each other like that. I'm sure in his mind he is being helpful....
@ November 16, 2013 11:08 AM in Multi temp loops questionSwei is correct ( again)
How far along are you?
A heat loss should be done.
Condensing boilers don't condense at high temps.
High temps and dry climates are brutal on hardwood floors
@ November 16, 2013 10:55 AM in monofloGordy,
The heat loss is obviously flawed. No matter how you look at this the system will not produce 9000. You just can't get that much energy out of 80 feet of 1/2" tubing. Although this setup is a bit of a compromise, it may be the best option.
The real question is, why does Paul keep ending up as the " cleanup man" how can he get his foot in the door earlier and get it done right the first time. Maybe marketing to a more high end client would help.
@ November 16, 2013 10:40 AM in crown boiler biminiThe crown boiler has very few control options.
Why did the contractor buy a condensing boiler? You are going to be forced to run it high temp most of the time in order to make the baseboards work. Normally, I would suggest a tekmar setup. The boiler does not take 0-10 vdc input so that will not work.
Unless you get creative with the snowmelt controls, the boiler is going to fall flat on it's face when the outdoor slab comes on line. A 667 will help as you can regulate the delta t and boiler minimum temps.
If he won't spring for 667, you could put an aqua stat on the boiler loop so that the snow melt will turn on only when the boiler is keeping up.
Yes you can use an I mix valve. I don't see why you can't use the 0014 circ the manual calls for.
Be careful how you control the snowmelt. If the snowmelt circ runs without the boiler circ, the exchanger will turn to a block of ice. Don't ask how I know that, let's just say " I heard about a guy...."
As you know, this would be much easier with a proper design from the beginning.
@ November 16, 2013 9:58 AM in monofloRich,
I have lived with the setup you describe. The problem I have seen is that you are constantly over/under shooting your thermostat.you also end up with hot and cold spots.
I prefer outdoor reset. I think fixed temp mixing is usually satisfactory.
I would never do a high temp radiant.
Slowly raising and lowering the slab temp is so comfortable.
@ November 16, 2013 9:05 AM in crown boiler biminiWhat do you mean by heat load? Where did the number come from?
Have you done a heat loss calc?
What would the mixing valve be used for?
How big is the house? What type of radiation?
@ November 16, 2013 8:34 AM in monofloWhy not cut in 2 closely spaced tees in the main pipe and then use a thermostatic mixing valve and a circulator?
@ November 15, 2013 9:28 AM in Dunkirk Quantum 90 Boiler EXCESS PRESSUREComplaining about how much pro's charge as you are asking for free help is not the most polite thing to do. It also will not bring you the best results.
Was the pressure and temp rating on the T&P correct.
Most of these problems are a result of a failed expansion tank. The water in the system will expand when heated and needs a place to go.
@ November 15, 2013 12:08 AM in ThermostatIt is obvious from your frequent posts on this issue the you prefer to have the house warm. I think that rather than saying "it feels like 65", you should simply raise the thermostat until you are comfortable. Problem solved! Who cares what the t-stat says?
@ November 14, 2013 9:04 AM in Weil Mclain Ultra/DHW Issues againIt is sounding like you have an air problem. You have an older bladder style expansion tank. You should not have an open air vent in that system.
I keep asking the same question, what changed?
The system has worked for a while and now it does not.
What is he boiler side water pressure?
You may be to the point where it would a good idea to get some local help on this one.
@ November 13, 2013 11:50 PM in Weil Mclain Ultra/DHW Issues againWhat is the boiler setpoint temp?
@ November 13, 2013 11:20 PM in Weil Mclain Ultra/DHW Issues againIf you disconnect the DHW wire and turn up the heat does the boiler heat perfectly?
If you jumper the DHW wire does the DHW work perfectly?
A DHW aquastat that is going bad and not making a positive open/close can cause a bunch of electrical gremlins. I am not sure your observations about circ and firing are abnormal. Modern boiler controllers do all sorts of things during normal operations that don't make sense at first. The fact that the boiler is getting stuck in DHW mode makes me think aquastat.
@ November 13, 2013 10:15 PM in I got the bill letter from the maintenence office.Be very sure you document every part of this very carefully.
I would have a record of every interaction you have had with this company. Include times,dates.people present and any quotes that you can think of.
You need to be proactive and take this up with your local housing board. They should be able to advise you as to the local laws. The video you have should be very convincing.
I would send the management company a certified letter stating why the bill will not be paid.This will give you ammunition should the bill be sent to collections. I would also let them know that you will be asking for a refund on your rent for the nights the apartment could not be occupied.
I would copy the housing board on all future corespondents with the management company.
Are property managers licensed in your State? I would contact the licensing agency as well.
This battle will be won by you if you document it correctly.
Do you have a lease? Is any of this covered in it?
Try to keep your emotions out of this, you do not want to give the authorities any reason to think you are being unreasonable. Just present them with the facts and ask for their advise and assistance.
Is it possible to find out who lived there before you? They may have had the same issue.
@ November 13, 2013 2:07 PM in Weil Mclain Ultra/DHW Issues againYour domestic water issue is completely unrelated to the boiler expansion tank. Do you have an aquastat or is it a sensor?
First off, fix the DHW issue.
Is the leaking valve on the water heater or the boiler?
If it is on the water heater it is caused by the tank being too hot. This will resolve itself with the new aquastat.