Joined on August 13, 2009
Last Post on July 23, 2014
@ October 21, 2009 8:09 PM in Reverse indirect with geo for DHW preheat?I have a Climatemaster geothermal tied into my radiant heat system. I originally ordered it with the desuperheater but later decided to skip using it for cooling. Chilled water is a pain and I decided to install mini splits. The unit comes with a brass pump on a seperate circuit that would circulate into a tempering tank for the tankless water heater. It would just save the heat that normally would get put in the creek during cooling, it seems like a good idea. But like you my cooling load is nothing. My geo unit maxes out at 120 and thats not hot enough. Some of the newer units use a scroll compressor and can get 140, but at those temps the COP really drop off. I use it strictly for heating the radiant floor and use an outdoor reset to get the lowest possible water temp on that day. COPs drop significantly with increases in water temp so keep it as low as you can. I have been really impressed with it overalll. My heating bill is less than the cable bill.
@ October 20, 2009 6:45 PM in Steam system expertsRemove the concentric reducer on the T, make this simple fitting and reinstall. A/C installers make fittings like this all the time on systems that run at a little higher pressures.
@ October 19, 2009 7:31 PM in Is one Steam boiler better than the restThats because they use the same end castings on all of the boilers in that series.
@ October 18, 2009 3:02 PM in Steam system expertsYou just need a few tools. Use a copper sweat cap for the larger size and drill it off center the size of the pipe your reducing to so the bottoms of the pipe are equal height, then slide in a piece of copper tube and silver braze the joint with sil-phos. The joint will be stronger than the copper.
@ October 11, 2009 12:56 PM in tanklesswith gas. I agree with you on solar. I have 2-20 tube panels on a drainback for over a year now.I have to say I have been really impressed.
@ October 11, 2009 11:27 AM in Boiler or piping issueshis job specificly, It looks like an old gravity system that was either split or 3 additional zones were added, probably with baseboard or convection. On that job, sometimes not always, when there is a call for heat from any zone other than the old gravity zone, heat will migrate into the old piping because of its size and pitch. If the zone valves were on the supply it would prevent this.
@ October 11, 2009 10:48 AM in tanklessin my own home 1 year and 4 months ago. It has performed flawlessly. It operates at 98% efficiency, making just the amount of hot water you need at exactly the temperature you desire only at the time you want it, Go away for ten years and come home home......you didn't use one cent of gas. Maybe you could get the other 2 percent of heat if you really tried. Maybe you could use an atomic reactor and split the gas atoms to obtain more heat. As far as cleaning the units once a year if you have hard water...that's a plus, that you actually have the ability to do it. Tank type water heaters may not be susceptible to pressure drop in hard water conditions but you can bet their efficiency is just slowly dropping away with basically no way to clean them out. 2 inches of concrete on the bottom of a water heater does not improve efficiency. Check stack temperature on a tank type water heater after a couple years in hard water. I don't know about 40 or 50% percent savings, that's all a bunch a crap, totally dependent on how you make hot water now and how big your family is. But I do know there is no better way to make hot water.
@ September 27, 2009 9:07 PM in Navianmy water is 57 degrees from my well. I have pressure balance valves in both showers and they work fine with the Navien. I do have a constant pressure pump and when I install Naviens on pump systems I will install a cycle stop on the pump. They are inexpensive and I have found them to be better than a constant pressure pump. Here is a website http://www.cyclestopvalves.com/. I would suspect with any 30-50 or 40-60 pump switch you would cause any tankless to hunt. So I dont think constant pressure systems are for Navien alone. I would suspect all tankless water heaters would be better served by constant pressure...for that matter so is the whole pluming system.
@ September 27, 2009 8:03 PM in NavianI have a few of them in including one in my own house now for 14 months, they have all worked flawlessly, The A model with the tank uses a little energy for standby but one of the returns is that you dont need a minimum flow. The pump can be recirculated internally or used for a circulation line. They seem to be very clever, the price is right and the warranty is 15 years.Try it I think you will like it. They also make a nice repair kit with all the pieces that can fail. Worth getting after you start to get a few in.
@ September 27, 2009 10:05 AM in Siggys hydronic know how 2I recently purchased Johns Hydronics Know How 2. I am having trouble installing it on a HP computer running XP. Actually I have 2 HPs and I get the same failure on both. I then installed it on my daughters laptop which is running Vista and had no problems. I talked to John about this and he sent me another copy and offered a refund but so far I havent been able to figure this out. I told John it was time I upgraded to Vista anyway but now I see Windows 7 is coming out next month. So I figure I will wait even though they are offering the free upgrade if you buy the computer now, I would rather buy the computer preloaded. So here I am with XP for another month and this disk here that I would love to review. Question is... Has anyone else had this problem and found the fix?
@ September 21, 2009 9:16 PM in jodaReplaced with a standard aquastat. Otherwise the boiler will maintain a minimum temp.
@ September 21, 2009 11:12 AM in Non 02 barrier tubingwith a properly sized stainless flat plate exchanger and use a stainless pump on the tube side.
@ September 20, 2009 5:07 PM in Contrast Furnace BrandsThey have Excellent equipment and I have very little trouble, good parts inventory. They also have a no-hassle guarantee that doesn't just replace the exchanger but rather the whole unit. As far as Trane goes, I have to disagree with Clammy. The stuff they are selling at home depot and some of the installs Ive seen don't lead me to believe they are anything special, they just spend a lot on advertising. The payback on a 95 percent unit is quicker the further north you live just as the a/c is the further south you live, But condensing furnaces are not that much more than non condensing and usually vent out with 2 inch pvc,so they are not much more to install. Plus depending on the shape of your chimney, it may be just what your looking for.
@ September 16, 2009 7:50 AM in Had lunch today with some plumbing contractorI know contractors here that if they even think one of their journeyman is going to take their masters test, they lay them off right away. I assume because they are afraid they will take their customers. Also they are always trying to come up with some reason why someone shouldnt be able to take the test.
@ September 16, 2009 7:43 AM in TT-110 to p/s or notbecause it deliver the same temperature water to every radiator. Most guys Ive seen, when they size baseboard use the 170 degree water temp to figure how much board they need in each room. This is only true when using a reverse return, when using a monoflow or loop system they neglect the fact the water is getting consecutively cooler and cooler as it exits each radiator and never figure this into their calculations. Reverse returns get the bad rap that they cost more in pipe to put in, when in reality if you have to keep adding more and more cast iron board to each room, at todays prices it gets alot closer. When I use to do school work they were always piped in reverse return.
@ September 16, 2009 12:06 AM in Had lunch today with some plumbing contractorfriends and I brought up Heating help .com. They started to really give me an earful about how we help out homeowners for free. They said, did you ever see a lawyer have free lawyer help. Or doctors that sit by their computers to diagnose your heath problems online or any other professional, I said I never really looked! I was listening to this, kinda dumbfounded as they went on to lecture me about how it took 25 years to get here, starting with cleaning crappy sewers and all those things we did as apprentices. They said your either really generous or really stupid. This is the first time I ever heard anyone talk down about this sight. Anyone else ever hear this?
@ September 14, 2009 11:55 PM in Hot Water Hotter at Bath FaucetI have seen some cartridges leak through
@ September 13, 2009 3:25 PM in TT-110 to p/s or nota TT Prestige, just like your doing, piped right through. The prestige has alot of parameters for you to adjust but the factory wont give you the control supplement unless you go to their school in NJ. I dont know if you have ever been there, but it is really worth going. It usually cost about 150 bucks for 2 days. That includes the hotel and the food. A limo into Philadelphia for a feast... the whole deal and then they give you 100 bucks off your next prestige. They really go over all the parameters and they have working units on the wall. Anyway its well worth it. But anyway radiators on old gravity systems were never made to run at 180, usually 140-150 on design day is enough, so set your outdoor reset accordingly and that thing will be condensing on all but the coldest days. Also a couple of well placed TRV;s in some rooms they want a little cooler can save bucks. Show some pics when your done. Take care
@ September 13, 2009 8:08 AM in TT-110 to p/s or notthe supply to the T and out of the T, any side you like, until you come to the first T that feeds a radiator, follow the line to the radiator, through the radiator and then the return line from that radiator back to the main return. If that return main goes directly back to the boiler, the same distance as the supply did, it is a 2 pipe direct return. What you really want is a 2 pipe reverse return. Water is lazy, if it can go 10 feet through the first radiator hook it through a big cast iron radiator and right back to the boiler, there really isnt any reason for it to go all the way back to the last radiator. Ideally want you want to do is make it equal distance to and back from each radiator, you do this by reversing the return. First radiator to get water is now the last radiator back. Because you have Ts bullnosed off the boiler I am going to assume the boiler is centrally located near the middle of the home. You probably have 5 radiator in the front of the boiler and 5 in the rear. When they are like this the problem isnt so pronounced as it would be if the boiler was in the front of the house and the mains extended all the way to the rear, this is when the rear radiators dont get hot at all. If all the radiators get hot in your case and no one is complaining about cold rads or overheated rooms you can leave it, but to really make the job right you should reverse the return so the flow is balanced. This can be a hard sell when the customer doesnt feel the problem. Usually depending on the job I will break out the bullnosed Ts and put ball valves on either side to balance the flow between mains. In Dans book 'PUMPING AWAY' he has a ladder diagram of a direct return and reverse return system.
@ September 12, 2009 6:32 PM in TT-110 to p/s or notgravity and is piped in 2 pipe direct return. The rule of thumb for converting pipe size is 1/2 the pipe size and drop one pipe size. So 2"= 3/4. So your 1' will be more than adequate. Your boiler is only 100,000 out so you only need to move 10 per minute max at 20 degree delta t. You dont need 2" pipe to do that. Is this system still direct return or was it coverted to reverse return?
@ September 12, 2009 10:33 AM in TT-110 to p/s or notcast iron rads. Im sure you will have no problem with the grundfos 3 speed supplied on the unit.