Best Of
Re: 300 cfm per ton?
Exhaust fans will not help. You exhaust air and more air infiltrates in putting more load on the system.
Re: would you replace these controls immediately or wait and see?
Oh!? If it's a customer, I would change, swap things out. Who needs the headache of the maybe it will fail maybe it won't scenario? So, "When in doubt, change it out !"
Intplm.
Re: How does water velocity affect a hydronic system? This weeks video
I would have liked to see pressure gauges on each side of the pumps to see the actual pressure drops vs. calculated.
TACO 007’s are such a “gentle” pump; hard to image them over pumping.
With all our knowledge, there are many weird things that happen on jobs that confound us and are beyond explanation.
Re: Old house heating: Steam radiators or forced air?
If it's a single pipe system there's several things that can cause the hissing.
We can help you, but you'll need to help us do a radiator survey to see what's there and then compare it to your current boiler size. We also need to look at what venting you have.
DO NOT replace the boiler with the same exact size until a survey is done. Don't assume, and don't let the contractor assume. Also don't assume the piping is correct.
ChrisJ
Re: 300 cfm per ton?
is this a commercial building? If it is the is the wrong program. The fact you have equipment generating steam is also an issue.
pecmsg
Re: Is this a house trap?
I don't believe any of us have the full picture here. Please be kind enough to give us a very basic sketch of the fittings in question & the layout of the house Sanitary piping, vis a vis the street sewer. For example; see sketch I made. Mad Dog
Re: Is this a house trap?
Ok...so..it was a Clean out wye caulked in to a Single vent running trap. Mad Dog
Re: would you replace these controls immediately or wait and see?
Since the best practice to 'Save' the water contaminated / damaged equipment was not implemented at the time when the damage happened, I would recommend that it should be replaced.
Simply just letting it dry out is (was) not a good plan.
The present problem is where is the corrosion hiding and what issues will it cause in the future ?
It certainly could be cleaned up and the relays replaced (if needed), but it is probably not worth the cost (Vs. replacement) to have it professionally repaired. If the homeowner wants to assume the liability, get it in writing.
109A_5
Re: would you replace these controls immediately or wait and see?
Look at the moisture in those relays and the corrosion around the resistors on the board! The control should have been replaced without any further testing.
The manufacturer of any control that’s been subjected to water like that will tell you to replace it.
You’re not doing yourself or the customer any favor by trying to re-use controls in that condition.
Ironman
Re: would you replace these controls immediately or wait and see?
Those relays will fail — the question is, when? If the equipment is properly fused and safetied, I doubt that there is a fire hazard, but check and make sure that the controlled equipment is properly safetied, as one of the failure modes is to lock something on which shouldn't be.
Me, I'd replace the stuff.
The rice trick is one what to handle electronics which have gotten wet. Another is freeze drying. Niether will help much if the water was salty or otherwise grundgy, not if the exposure was more than just a dunking.
