Joined on January 27, 2011
Last Post on April 13, 2014
@ December 7, 2013 11:39 PM in Rotation IndicatorsWith frozen shaft pump gets overheated and turns off internally. It manifests itself as no rotation on energized pump. It is a good tool for wet rotor pump troubleshooting as well.
@ December 7, 2013 2:18 PM in Copper Press FittingsWent with propress 5 years ago and never looked back. Pressing up to 4". Now waiting for carbon steel mega press to be available.
@ December 7, 2013 2:13 PM in Rotation IndicatorsIt is on my key chain. And it shows actual pump rotation. Of pump is stack, it will not turn. Also works on solenoid valves.
@ December 7, 2013 2:10 PM in Taco Bumblebee CirculatorYou can try to slow down water flow by playing with ball valve on pump discharge. It might bring pump to the controllable range.
@ December 1, 2013 10:29 PM in Steam Boiler Floodingdo you have working check valve on feeder pump? it is possible that condensate back flows from boiler to the tanks trough feed line if check valve is broken.
@ December 1, 2013 10:25 PM in Steam Boiler Floodingfeed pump mounted on the tank is controlled by low water cutoff /feeder combo, or similar device mounted on the boiler and in case of low water conditions starting the pump to feed boiler to proper level. Also on the tank you have to have float switch preventing pump from operation in case of low water level in the tank, and same switch or additional one to turn on solenoid valve mounted on water feed line feeding tank, not he boiler directly.
hope it helps
@ November 27, 2013 11:10 PM in best temperature for Cast Iron Radiatorsjust install TRVs on each radiator and set your temperature room by room.
@ November 16, 2013 10:23 PM in ViessmannI would not be surprised. In general US market is resisting high efficiency boilers at all levels. New technologies like co generation and tri generation are not accepted in USA and Viessman does not even consider to introduce it to US market. So, what they going to show off? Their condensing boilers? it is yesterday technology and this yesterday is not even today here.
@ November 14, 2013 7:45 PM in Testing a 15psi pressure safety valve on my boilerTesting is done by insulating supply and return lines ( valves had to be installed by boiler installer). Then you have to jump pressuretroll and manual reset pressuretroll if it is installed. Then you turn thermostat all way up or jump it as well. Watch steam gage. Valve must pop open at 15 psi sharp. Also the best thing to do would be to hire professional for this testing. Do not do it yourself.
@ November 4, 2013 6:53 AM in CO GeneratorLook at the bright side. It is 100% efficient.
@ November 2, 2013 8:26 AM in danfoss ra2000: how do I reverse?just relocate trv to another radiator port
@ October 27, 2013 9:12 AM in Ex tanks problemare those boilers piped as shown in attached diagram?
@ October 27, 2013 6:57 AM in outdoor reset and thermostat setbackYou have to have remote viessman control unit instead of thermostat set to reduce mode with schedule programmed in. Regarding second zone, you need another control unit with mixing valve installed and programmed. Just shutting boiler or zone valve on outdoor reset system will lead to very long time to get to desired zone temperature after turning zone on.
@ October 24, 2013 10:16 PM in Bosch Greenstar Combi 100 / Not sufficiently heating three zonesI do not want to sound negative, but workmanship here is not acceptable in my opinion.
I do not see acid neutralizer on condensate drain line.
I do not see BFP drip line extended to no more that 6" AFF
I do not see min 18" before and after air scoop
I do not see isolation and drain valve on expansion tank
I do not see DHW mixing valve
Just to name a few
@ October 23, 2013 8:06 PM in Bosch Greenstar Combi 100 / Not sufficiently heating three zonesWhy are you acting as you want to troubleshoot your brand new installation? Where is an installer? And all this installation looks like nightmare on elm street movie.
@ October 23, 2013 7:41 PM in We're falling behindThere none. And the ones who willing to learn are not capable because they are uneducated. And social level of heating technician or plumber is so low, that only leftovers of work force are forced into this trade. Then "do not shoot the piano player, he plays as he can".
@ October 22, 2013 9:54 PM in aquastat settinghi is a boiler limit, set at 180, lo is to prevent condensation, set at 140. lo is preventing circulator from pumping constantly cold water trough the boiler. it allows to heat portion of the water at the time.
@ October 19, 2013 8:54 AM in why use primary/secondary if not needed?Sorry, i was unclear. Primary secondary piping cost of pumping is lower then the one of conventional setup even with 1 extra pump running. Just my 2 cents.
@ October 19, 2013 2:00 AM in why use primary/secondary if not needed?are you saying the pump in this set up is controlled by thermostat?
@ October 7, 2013 8:21 PM in Benefit of zoning with outdoor reset on MOD CONZoning and setbacks are not working well in systems with outdoor reset. You can either install TRVs on each radiator or do outdoor reset for each zone.
@ October 6, 2013 9:12 PM in Boiler Sizingyou get rating per section not per column. Please multiply to sections quantity