Joined on November 2, 2010
Last Post on November 29, 2013
@ November 29, 2013 10:45 AM in MikvahGood afternoon. Happy thanksgiving to you too. Thanks for the reply.
While gpm inside the pipe vs velocity is extremely familiar to me, the rest of the hx info hasn't set in yet. Spent a few hours last night going through many available engineering tables and graphs only to come out with more questions. All great info, just have to piece it together to form the puzzle.
As for the water heater question, the water in the pool must stay in the pool. That leaves a few options to heat the water. Hx dropped in the pool, radiant walls and a few other creative options. In short the two waters should be separate.
@ November 28, 2013 9:31 PM in MikvahGood evening wallies. Done a fair share of hydronics. Snowmelt to custom radiant to retrofits. Got a job to change a boiler supplying a private mikva. Has a one inch coil in the water. Would I do a heat loss like the ibr does on a pool? I have the surface area and all dimensions. Roughly 940 gallons.
Also, how do I choose a dt?
Lastly, does anyone have an engineering chart for copper pipe edr vs DT (accross the coil to the pool water) and internal flow of the coil to see if the coil can handle the boiler? This is a retrofit job.
Thanks in advance.
@ November 26, 2013 6:53 PM in How far can you downfire an Independence IN5?Good evening Tim. Can one upfire a unit within 10% too? Obviously with proper tools to monitor the combustion and gas pressure.
@ November 24, 2013 3:05 AM in How far can you downfire an Independence IN5?Rod, How are you performing the downfire? Through manipulating manifold pressure or changing the orfices?
@ November 3, 2013 7:30 PM in gas burner surgingHey wallies,
Similar issue here. Manifold side of the Honeywell gas valve is surging. Same supply pipe to the water heater and the manifold side of the heater is fine.
combustion analysis checks out fine. Any suggestions?
@ October 24, 2013 7:04 PM in Press Tools - Ridgid vs MilwaukeeSo many options. Ridgid has a great lifetime warranty. Milwaukee says ridgid jaws will work, so that opens up options. The German press companies dont seem all to common, but I could be wrong.
@ October 24, 2013 6:18 PM in use 2-stage stat to override outdoor reset?Is this your home or a customer?
Using the second set of contacts to energize the dhw setting and wiring the dhw to send power to the right places will work. However, if this is your home you would be much better off setting the heating curve via odr to match the home. When thats done, of you still desire to wire up the second stage to kick in when the door is left open do so. You can also wire the second stage to a counter and see how often its needed. That will help you dial in the odr.
@ October 22, 2013 12:04 AM in Press Tools - Ridgid vs MilwaukeeHey there wallies. Looking into adding a press tool to press Veiga fittings. Most of the jobs will be residential or light commercial with the largest size we plan on pressing being two inch copper.
A colleague has the m12 force logic tool and it looks great. Even got to press a few fittings with it. I would be interested in the m18 which presses up to four inch capacity, however it doesn't seem like Milwaukee sells the "ball tip actuator jaws ring clamp kit" in small diameter sizes like Ridgid has for its new RP340.
Insight from the field would be much appreciated.
@ October 18, 2013 12:57 PM in why use primary/secondary if not needed?"Isn't it bad practice to use a energy-inefficient setup (one extra pump) when it isn't needed?"
It always bewilders me how people will penny pinch on minuscule details. The pump (assuming 007 or the like) in a residential application is not much more of an electric draw then the lights left on in the yard every night, or other power robbing electronics left plugged in.
Ask yourself, do you unplug the cable box, cell phone charger, computer, printer, etc when not in use? If the answer is no, then add the pump. If the answer is yes, call the manufacture to see if you can get away with it.
@ October 15, 2013 10:14 PM in Hydro-Air Water TempsHow wide can I size the Dt for on a 75mbh coil? Is there a standard like we have for radiant, baseboard and for pannel radiators?
Thanks in advance.
@ October 12, 2013 10:02 PM in New Vitodens in ClosetNice install! Neat and organized. How is the expansion tank held in place? I see a red bracket of some sort.
@ October 2, 2013 10:22 PM in Infloor Radiant Heat issueI recently spoke to a customer of mine with a small cottage in a very cold climate. He has electric baseboard as the built in heat source. He says his wood stove is the key to bringing the place up to temperature
@ September 17, 2013 7:53 PM in Instant Hot WaterGood afternoon. I have a customer that recently replaced their Hotmaster (by Westbrass) instant hot water dispenser. Yet again it stopped working. I am under the understanding that elements can not be replaced.
Is there an instant hot water dispenser that is know to last more than a year or two?
@ September 17, 2013 1:59 AM in When to turn on the heatingAs an installer I prefer the heat gets turned on early in the homes of clients with boiler retrofits from summer months. Theres a good feeling to drive by a new install on the way to another client and see direct vent of the mod-con puffing exhaust out. Also allows us to work out kinks before the bitter cold sets in.
Thanks for the link!
@ September 16, 2013 12:56 AM in High Efficiency Wall Hung ReliabilityFor the most part they are great when installed properly, and maintenance is done. However, I always suggest that in the colder climates one should have a backup source of heat (wood, ductelss minisplit, or if you have central air add an electric element). When these units go down it can sometimes take a day or more to get a part and having a backup heat source to take the chill out of the air is comforting.
@ August 30, 2013 6:08 PM in Bridging the gap Hydronics to ACThanks for the replies. After much research I have decided that Daikin, Mitsubishi, & Fujitsu will be my brands of choice.
I am still looking for online training (Taco style - webinars), a good forum to read, as well as quality installers on youtube showcasing their work.
@ August 30, 2013 5:58 PM in ODR Starting TemperatureDoing the division, required BTU / EDR an artificially low number results, so this method doesn't work. Set it to 120*f as a starting point.
@ August 25, 2013 11:22 AM in 0-10vdc thermostat - LochinvarGood afternoon wallies,
Pondering how I could get indoor temperature to control a knight boiler. Below is a link to a Honeywell thermostat that puts out a 0-10vdc signal. The control on the knight allows a 0-10 input from a BMS. Would this work?
Thanks in advance.
@ August 19, 2013 12:17 AM in Tekmar ControlsGood evening Tim, glad to hear more is in the works. I have also used a Tekmar 261 to control two boilers off odr. It works well on that system. The injection controllers are also used often on high and low temp jobs where a 4way mixing valve doesnt fit the bill.
@ August 17, 2013 10:22 PM in Tekmar ControlsTekmar controls appear to be improperly used and incorrectly applied from what I see in the field. In fact a lot of the true potential and features are not being used at all. A great example of this is a 667 snow melt control that just had the slab sensor connected and none of the mixing sensors. The home owner asked for a 24hr timer to be installed after we repair a leak. Customer service is also nonexistent (or i dont have the correct tekmar branch phone number).
Tim, what is the study about?
@ August 11, 2013 10:59 AM in Giannoni HX?Thanks for the lead Kal!
In your opinion, should I switch out the bumble bee to a vdt pump so that the boiler and pump "talk" to each other?
@ August 10, 2013 10:12 PM in Giannoni HX?Good evening Kal,
I have had a fair share of playing with the knight boilers, usually in the form of servicing, never saw one with VDT. For design boiler work I haven't toyed with DT across the HX, but did ask a Lochinvar rep at a trade show recently how it was done and if a module was needed as I understand its application and would like to employ it. Needless to say I had three reps tearing the cover off a display unit but none knew the answer (display boiler was screwed shut to prevent internal show lighting wires from tearing). They took down my info, took my card and never called back, but did try to sell me on the Cadet. On my latest residential retrofit I have a Bumble Bee as the boiler plump (Knight WHN) so as not to experiment on the customers home with zero company support backing me up.
With this type of contractor to customer relationship, Viessmann may be getting my business. They're local, right here in RI, and rolling new boilers onto our shores.