Joined on August 11, 2008
Last Post on December 9, 2013
@ May 4, 2013 3:15 PM in Lesson learned NEVER let the wife tag along to the home showYou only think you made a winner with that one. I'm tellin ya, there's a marker waitin' to be played. It's in the manual somewhere. My wife is my best friend, and strongest ally. She has been for over 30 years. I don't say "NO" to her. I lay out the facts, and let her figure it out. And that's a two-way street.
@ May 3, 2013 8:53 AM in Lesson learned NEVER let the wife tag along to the home showDamage Control is the answer. If you try arguing, she'll start crying, and then it'll cost you twice as much. There's a manual out there somewhere, that they all train from.Here's a statement that will make you cringe,"I'll do it myself". That one will get you out of bed, with the flu. Page 42 in the manual...LOL
@ April 29, 2013 5:59 PM in what size boiler woul you recommend?I re-read my posts, and they weren't written in some obscure Lithuanian dialect. I was just trying to clarify possible options for the OP.
@ April 29, 2013 5:44 PM in what size boiler woul you recommend?The combi's you're describing have the DHW outputs they do because of high BTU output. You won't find one, sized for a 40000 btu heat loss with those kind of DHW outputs.
@ April 29, 2013 5:08 PM in what size boiler woul you recommend?I wasn't suggesting over-sizing the boiler. Merely increasing the capacity of somewhat wimpy output from a combi, using what he has already.
@ April 29, 2013 4:53 PM in separate boiler/system pump required?If you have enough emitters,you can get away with much lower temps, even at outdoor design temperature. This will ensure that the boiler stays in condensing mode, even when the outdoor temps are moderate.
@ April 29, 2013 3:12 PM in what size boiler woul you recommend?How about using his indirect for storage in conjunction with a combi?
@ April 29, 2013 1:58 PM in separate boiler/system pump required?Without knowing how he is designing.....It's hard to say.Wouldn't he be better off with enough emitters to be able to satisfy the demand with 140* water, and let the DT fall where it may? That wide a DT would seem to suggest emitters in series, and if he's starting from scratch, wouldn't he be better off paralell? Just tossing out thoughts
@ April 29, 2013 1:40 PM in separate boiler/system pump required?Size for DT, or size to emit at lower temps?
@ April 26, 2013 11:01 AM in Vitodens 100-W temp setting questionThe dial provides fixed inputs, and would have to be checked by a tech.
@ April 25, 2013 5:42 PM in Hot Water Recirculation pipe erosionIf it was a velocity issue, it would fail at any elbows first. It is considered an "Open" system model. What is the application? From the manufacturer.....For Open Systems- 140*F (60*C) is the maximum recommended fluid temperature to avoid precipitation of calcium in water.
@ April 25, 2013 5:18 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)get hung up on imbalanced DT's primary to secondary. If you just concentrate on balancing flows primary to secondary, which is what you want, it just works out that way. Engineers would have trouble wrapping their head around it, because it appears to be a system 'Out of Balance". It's not, and I would argue that it is as close to being in balance as you can make it.
@ April 25, 2013 3:43 PM in Control options with Vitodens 200 WB2B (Vitotronic 200 + Vitotrol 300)You are attempting to match flows. With a fixed flow for primary, you are going to wind up with the highest DT(lowest flow). If the primary and secondary pumps will match each others flow, who cares.
@ April 25, 2013 2:50 PM in Vitodens 100-W temp setting questionhas to verify the inputs are correct. If they are, there is something wrong with how they are being used by the equipment, i.e. not properly calibrated.
@ April 25, 2013 2:16 PM in Very NiceWhy they do that when it says the ECM is capable of maintaining pressures equivalent of between 1 and 16 ft? Curious
@ April 25, 2013 12:32 PM in Very Niceto Wilo's instructions....Where the systems head is unknown, they recommend starting with 10 as a set point. I guess you'd have to instruct the homeowner on how to fine tune based on system performance.With a minimum shut-off head(zero flow) of 4, would this circ even work for Mr. Barba's 1 or 2 zone only examples?
@ April 24, 2013 4:32 PM in Vitodens 100-W temp setting questionHow can it follow a curve, with no outdoor reference? I believe he is reading it this way....In the absence of an outdoor sensor, it should operate at a fixed temperature, as it states. His is not accurate to the dial setting.
@ April 21, 2013 8:59 PM in Direct Pump TT Solo 110 with 3 zonesUsing your calc, and dropping the boiler flow to 4 gpm, I get a return temp of 127.5*?
@ April 21, 2013 7:56 PM in Direct Pump TT Solo 110 with 3 zonesAll that "calcumulating".......The return temp has to equal the change created by the emitters.
@ April 21, 2013 7:25 PM in Direct Pump TT Solo 110 with 3 zonesThat's enough! No matter what I say, you find a way to argue it.You're like a GD pitbull. Give it a rest!
@ April 21, 2013 6:19 PM in Direct Pump TT Solo 110 with 3 zonesNo matter how you cut it....everything is predicated on the emitters ability to disperse btus. If only half the btus go out to the secondary the return mix is that much cooler. Again, I understand what you are saying, and your reasoning, but I believe there's an application for both strategies.Both could be right, or wrong if mis-applied.