Best Of
Re: Issue with grundfos alpha2 pump
figured it out. Pump needs to be power cycled after changing modes. Once it kicked back on, it was sending 8gpm
Re: steam boiler short cycling
used 1qt ,8 way treatment per instructions, its going off on pressure troll which i repalced & set just below 2psi ,with diff @1from factory,all the radiaters across were getting hot , before I left job, tanant mentioned that radiater were not very hot, but was heating , I did find few valves closed for radiaters in bldg & opened all radiaters in bldg to test full heat.
nytech28
Re: Water trickling sound in hydronic baseboards- please help
Usually the coin air vent at the top of the system will work if the pump is operating or if the pump is off. So you can try it either way. There are some instances where operating the pump is better and other instances where operating the pump is problematic. Every system is different. Example below:
Re: Water trickling sound in hydronic baseboards- please help
Is it possible since the system was worked on recently that some debris got into the piping?
What type of work was done ?
I had some small pebbles circulating in a system once, my fault, and they finally got stuck in the pump and broke the shaft
It was more like a light tapping sound, and it moved throughout the piping.
Sometimes you can increase the fill pressure for period of time to get problematic air out, maybe 20-22 psi
The higher pressure squeezes the air bubbles smaller so they go along with the flow better
hot_rod
Re: Hydronic Heat Zone heating when thermostat is off
And to add to that, in order to find the manufacturing date on the circ look at the electrical box near the wire knockout. It will have a date such as 0506 which would mean it was probably manufactured in Jan or Feb of 2006 (yes the circs get predated at manufacturing so that when you get them in your hands its close if not early for the jobsite)
Dave H_2
Re: Relief valve keeps popping
was the pre-charge checked and adjusted on both tanks?
What was the capacity of the old compression tank?
Did water come out of the air stem on. The tank that failed? That is an indication of a failed diaphragm
Has the pump been changed? Looks like you are pumping at the expansion tank? Pump on the return, expansion connection on the supply? Where is the fill valve connection?
hot_rod
Re: Monoflo tee and pumping away
If you're replacing a boiler where there's a mono flo system, its important supply and return flow stay the same. Where in a series loop it doesn't matter if you reverse flow in most cases. I've replaced numerous boilers where's there's a mono flo system and the old had the B&G 100 on the return. New installs always pumping away. Never an issue.
HVACNUT
Re: Monoflo tee and pumping away
And the behaviur of a monoflow system has nothing to do with the location of the pump nor even the static pressure in the system. It does, however, have a lot to do with the water velocity in the distribution pipes — so one way to mess it up which your guys may have found is to substitute a very different pump…
Re: Monoflo tee and pumping away
just to be clear the pump could be on the return and still be pumping away as long as the expansion tank is connected at or near the pumps inlet
Many mod cons have the pump on the return to help overcome pressure drop in the boiler
Here are two examples, one with pump at return, one at supply
Typical ci boilers have low pressure drop so tank at return, pump on supply is still “pumping away”
What is important is for the air purger to be at the boiler supply out, the hottest point in the system
hot_rod