Heating Help

I bet you got it...

@ February 15, 2012 5:41 PM in weil mclain gv gold lockout problems

   I'll bet you just solved your problem...read my post above, it seems if whatever is signaling the boiler(t-stat in your case) isn't making perfect contact, it causes these things to do wierd stuff.   If you're jumping the t'stat wires and the boiler seems to run normally, I'd start with a new t-stat...their cheap!!!

leak

@ January 17, 2012 5:27 PM in Radiant slab leak

   I didn't install the system, but I know the company that did had a habbit of not gettting air on their systems...(they are out of business now).   I was hoping to hear ideas on the ultrasonic device as well.   We hired a guy years ago to pinpoint leaks in a batch of bac pex fittings one time...it worked good through sheetrock...just not sure about a slab.   I have pressured the two leaky loops and cant hear where the leak is with my ears...

Radiant slab leak

@ January 17, 2012 10:48 AM in Radiant slab leak

   I have a radiant zone leak in a extremely high-end, multi-million dollar house.   I have isolated 2 loops off of a 4 loop manifold that are losing pressure.   It is a basement zone and the tubes go under a high dollar wood floor and a tiled bathroom.   The zone is very cold now that I have isolated half of its loops and the customer wants it fixed.  
   I was hoping for some sugggestions on how to pinpoint a leak like this with minimal flooring demolition...any suggestions would help.   Thanks!!!!

This might help...

@ January 9, 2012 4:06 PM in weil mclain gv gold lockout problems

   Hi there I'm a heat tech in Montana.   Sunday I found this thread because I got a call about a boiler in Big Sky with the same symptoms.   Following the troble tree from w/m, I replaced the module...No help.   Then by accident I happened to see the boiler work and then cut out...the call for heat was fluctuating.   In this particular system the boiler was signaled by the end switch in a Taco pump box.   The switch in the box was closing, but intermittantly going off and on and possiblly not letting enoug current to get back to the boiler.   A good way to see if you have similar problems would to be to wire the two black wires in the boiler(labled 24v to t-stat) together...Basically just jumping the endswitch.   Reset the boiler and see if it acts normally.   If so you need to look at what is signaling the boiler(t-stat,pump box, etc)
   I have always assumed that a end switch is just a simple there or not continuity check, however this is the second time I've seen something similar...It seems that some solid state devices might make contact, but they don't allow enough current through them.   Just my findings, Hope this helps!!!

Expansion tank p.s.i.

@ October 31, 2011 1:30 PM in Expansion tank p.s.i.

   Anybody have a easy formula to calculate the CORRECT air pressure in a expansion tank for a hydronic system? Thanks.

T&P popping off

@ October 31, 2011 1:17 PM in T&P popping off

   I'm a plumbing contractor that has recently been doing fanny may repos.   It is difficult because many of the systems have been frozen or are completely dry and I have to get them running again.   One system that is a mixed baseboard/radiant system has popped the t&p after I got it running for about a week.   To get it running, I replaced the old t&p, and the fast fill which was overpressuring the system.   Purged it out and it seemed to run fine.   2 weeks later I get a call that the t&p popped early this morning...I plan on checking the expansion tank(I made sure it has air in the bladder, just didn't verify psi)   just asking for other suggestions on a random t&p popping off.   Thanks in advance for any help!!