Joined on November 25, 2004
Last Post on February 3, 2009
@ February 3, 2009 7:18 PM in Polaris Loop for Aux HeatThat loop from the polaris circulates domestic water so it may be that the 007 is not turning as it is a cast iron pump. The circ pump I use is a stainless pump. Hope that helps. Best regards, blackoakbob
@ January 21, 2009 7:20 AM in old army picsdone that. I was in avionics, 114th AHC give him my best regards.
@ January 20, 2009 7:11 AM in How to set up IC burners to run on low pressureI did have another suggestion, you could put a Spence type pressure reducing valve on the outlet of the boiler set at the delivery pressure, set the boiler at max and use the boiler and near boiler/header piping as a steam chest to store steam which would be recharged with long on and off cycles with the boiler. Good luck
@ January 1, 2009 8:50 PM in ? on snow meltI appreciate the kind input,I can see the value of the injection piping scheme and that may well be the solution if it has to come apart anyway. Best regards,
@ January 1, 2009 11:10 AM in ? on snow meltthanks for the reply, Mark. I do a have 20psi on at the inlet to the pump and at the manifold outlet to the slab, possibly 22 psi, and the temp on the load side never gets over 70 degrees from an inlet temp of 20. I know from my gshp systems that you need to keep the pressure up there. It looks like it's time to take things apart and see if the hx is fouled. We have had an above average December for snow so this has been agravating to say the least. Best regards.
@ January 1, 2009 10:31 AM in ? on snow melta typical beginning....it worked okay last year statement. I have a system that is just slow to poorly operating. The flat plate hx has a 36 degree drop across it and the boiler modulates at 50% to 55% with a outlet temp of 146 and return of 110. It just seems sluggish. There was a question of the anti freeze possibly gelling but with the td across the hx it would seem I have flow.I had a problem earlier with the home heating side of the system but that has been resolved...the expansion tank was too small. Any tips would be appreciated Best regards and Happy New Year to all.
@ December 21, 2008 11:48 PM in AHR Show in ChicagoMaybe we can meet some place where they have refreshments? Since I missed the Denver get together, as my Midwest plane was one of those grounded for non-compliance of the required safety inspection. I ended up taking a trip from Minneapolis to Milwaukee and back. What fun. Hope to meet some of you in Chicago. Best regards.
@ December 17, 2008 4:56 AM in Looking for modulating burner pressure controller...BoilerproCheck with www.omega.com, they have many, many ranges of 4-20 ma transducers. Best regards,
@ December 17, 2008 4:49 AM in Powerflame --why?This summer was my first experience with separate controllers, primary air, fuel, draft and fgr.They are along way from putting a match book in the relay and cleaning burnt contacts. Just working with a new CB Hawk set up, very elaborate control package, everything but sing and dance. Best regards
@ December 15, 2008 7:28 AM in Geothermal EquipmentI have used Waterfurnace the last couple times, but other brands since 1979. The last two were my first closed loop and have been working very well. Interconnecting with utility programs has been a tough, as no one company has a control and the utility programs are not all the same. They are required to offer conservation programs by the state public utility commission (MN) but not required to make it easy to deal with. All in all the gshp systems hve been much more reliable than in past years. Best regards
@ August 26, 2008 10:35 PM in Process steam for Bakery Oventhis is not for baking then, but for keeping the humidity up while some other type of heating is used to bake? Check with Armstrong they have an electric humidifier that may meet the application. Let them know what type of fuel is available gas, electric and if the steam is to be used in the process and the condensate not returned as it may have to be filtered. Best regards, blackoakbob
@ July 16, 2008 4:29 PM in Impedance(lockout)relayI am looking for info on how to set up this type of parallel circuit. I have a gshp contactor coil that I want to drop out via dry contact from the power company and in parallel a coil to close a contact to a back up gas boiler and to reset the circuit when the original heat demand is satisfied. Any tips, comments and criticism would be appreciated. Best regards,
@ May 11, 2008 3:25 PM in New Project - DFthe drawing Kal, much appreciated. That was quite a project, also. Regards, blackoakbob
@ May 11, 2008 3:15 PM in P/S Max GPM?the Taco hydroseparator on the Taco website last night. I'll check again tonight. Are they calling it a "hydronic bridge"? I haven't been able to locate a local ( Minnesota) rep for Caleffi, most of the sales people say, "Who?" Are they usually sized by the pipe size or gpm? Best regards, Happy Mother's Day! blackoakbob
@ May 10, 2008 8:54 PM in P/S Max GPM?That's what I'm after, I will check out Taco, thanks. My plan is to tie three boilers to an existing system via the hydro separator. Your project sounds great. What did you use for boilers,if I may ask. Best regards, blackoakbob
@ May 10, 2008 8:27 PM in Lock out relay?the info I was looking for Mike T. I will measure the resistance of the contactor coil and try to find an RBM relay that is greater. I do have a diagram as I remember this being used back in the late 70's in Carrier a/c units.Thanks, best regards, blackoakbob
@ May 10, 2008 3:55 PM in P/S Max GPM?Is there a maximum gpm limit on primary/secondary? I planning a job that may require 150 gpm total when all of the modcons are on. Also, would there be a significant PD across the IE. Caleffi unit? Thanks in advance. Best regards, blackoakbob
@ May 10, 2008 3:44 PM in New Project - DFVery impressive work. That last picture was the reason I came to the wall today. I was interested in the maximum flow anyone has used for primary/secondary. I was going to run it by people at Wetstock but I was one of the thousands that had their flight cancelled that weekend. I digress, may I ask what the Gpm is on that job? Waht would be the PD across the Caleffi? I have plans that may need 150 gpm. Again, very nice work. Best regards, blackoakbob
@ May 10, 2008 11:46 AM in Lock out relay?I'm wondering if I can use any relay for a lock out relay or if the coil has to be special. They used to call them impedance relay? The application is to have the coil run in parallel with a limit control or contact and the normally closed contacts of the relay in series with the limit contacts to hold open the circuit when the limit switch opens and require a break in the operating control to reset the locked out limit circuit. To further explain my application I have a geo thermal heat pump heating a buffer tank with a parallel gaas modcon boiler on a utility controlled dual heat setup. The utility will open a dry contact which opens the 24v line to the compressor contactor locking out the circuit and as the temp in the buffer tank drops the limit switch in the tank starts the boiler, it runs until the limit switch in the buffer tank or the thermostat statisfies, breaking the cicuit and allowing the it to cycle when the utiltiy returns control. Thank you in advance. Best regards, blackoakbob
@ April 15, 2008 7:38 AM in Picturesquite a variety of service calls. I have worked on some of these that came east out of Fargo, ND. They were DX units and cycle like crazy and are swithed from on board generator to plug in power on site. They were always a " train wreck " when I got to them, road dirt, vibration and extreme run times really take their toll. Like your units you almost need a shoe horn and vaseline to get things to fit. You're doing a great job. Best Regrads, Don
@ April 15, 2008 7:20 AM in Mueller Milk Coolers again!a very long time, but if I'm not mistaken the coils for this tank are side by side not top and bottom, so the load should be equal on each evap. You can adjust the charge of the one to get close to the other, sub cooling across the condenser is key to the this style unit. They do work very well. A clean condenser and adequate air flow is promary to efficient operation. Sorry I can't be more helpfull, but like I said it has been years since that sweet farm smell has permeated my clothes and truck.Best regards, Don
@ April 15, 2008 2:55 AM in Tankless startup noiseI have a Knight that does it when running at low fire start up. It's sized for snow melt but runs an indirect and backs up a geo thermal buffer tank, so it runs at low fire alot. I will run another combustion test when I go back to fix a small leak that showed up a couple months after start up. I did adjust one other Knight and it worked just fine.Best Regards, Oh, regrets to all that attended Wetstock Denver, I was one of those that had their flights cancelled last week, so I returned home to 16 inches of snow!