Best Of
Re: Toe Kick Space Heater
The unit is working, I checked the boiler pressure and it was below 8 lbs of pressure. , bumped it up to 15 and after 10 minutes it kicked on and started blowing warm air.
Thanks for your help
Re: Leaking Valve on 1/2 Cooper
Never knew they made a 1/4 impact screw driver like this before. I have the larger version. Thanks for this tool suggestion. I could see how I will use this in the future and could have used it in the past. Consider it purchased. Also the client just wanted it to stop leaking and forget about the shut off functionality for now.
Love your tool suggestions @mattmia2 .
lindylex
Re: Near-boiler piping : what do you think ?
Measure the diameter of the pipe, the risers. I am guessing they are 2" which will be undersized. The outside diameter of 2" pipe is 2 3/8"
2 1/2" pipe is 2 7/8" OD.
measure the OD not the circumference
Re: Leaking Valve on 1/2 Cooper
] SOLVED SOLUTION [
Here is better photo of the broken off screw.
After removing the valve I just used a little heat to get the knob off. That flat head screw was not coming off. Then I was able to remove old gasket material and clean out with a Dremel and small brass wire wheel. Used packing string as the new gasket three revolutions and install it. No more leaks and I never driller out the broken off screw and retapped it. I ran out of time. It is a useless shut off valve that no longer leaks. If time was not an issue it would have been done right! I hate doing things like this but I cannot control timelines and other people priorities.
Thanks for the help everyone.
lindylex
Re: New Taco zone valve constantly opens and closes
Aw @rick in Alaska — we're not that old. Though I'll admit it's been a while since I've seen a diagram on a paper bag…
Which, oddly enough, is correct. For two wire thermostats. Each thermostat — a simple switch — powers its own zone valve. The end switches for all the zone valves are paralleled and run to T-T on the boiler. Couldn't be simpler.
However I can easily see how whatever Rube Goldberg wiring may have been added or changed to make the T8400C thermostats work on two wires could very easily result in false signals getting to a zone valve or valves…
Re: new boiler versus old boiler
Absolutely critical. The vapourstat MUST be set to cutout at no more than 7 OUNCES per square inch (0.42 psig). Differential set at 4 OUNCEES. You should add a low pressure gauge (0 to 3 psig) to verify the pressure settings.
Anything more than that and the system will not work properly, if it works at all.
I don't seem to see any evidence of a Hoffman Differential Loop, and it quite possible that it never had one; only Hoffman Equipped Systems did. Or it may have been removed in some previous "improvement". in any case since neither it nor any other similar device is there, you are entirely dependent on the correct vapourstat settings.
Everything else is secondary at this point. You seem to have main vents in odd spots; Odds are the only vent you need is that big Hoffman, unless someone removed the crossover traps — in which case you probably need more main venting, but we can fix that later.
The oversize boiler isn't going to help, but what's done is done as far as that goes.
Re: One circulator pump with 2 zone valves, or two circulator pumps?
Big Ed_4
Re: New Taco zone valve constantly opens and closes
According to a quick search I did, the t8400 is a power stealing thermostat, which can mess with the actuator you have. Taco has some resistors you can install that on the zone valve that can help with that. They are 1000 ohm resistors which you can get from SupplyHouse.com
You could try disconnecting all the 8400 thermostats and just use the one th411 and see how it responds. That would give you a better idea if it is the 8400's making the problem. You could also go on the Taco site and see how they wire up to the zone valve. It's been too long for me to rememer.
Rick
Re: Radiant Heat. Should I raise the temp?
here are a couple piping fix options with closely spaced tees.
The Nobel, depending on the model is 1.4, 2 or 2.7 gallons of water content. Sending that to the radiant after the indirect satisfies will not be noticable. The Pex is rated for the 180f
hot_rod
Re: Radiant Heat. Should I raise the temp?
Here is an example of a primary secondary, you want to have some straight section before and after the tees.
While that crossover does establish a boiler loop, I don't think you are getting hydraulic separation between the boiler pump and radiant pump.
If this is a one temperature system a small amount of repipe could get you a boiler loop, indirect as a parallel loop, and a secondary loop with the correct spacing.
The primary loop is defined as the one with the expansion tank connected, it could be the boiler loop, the radiant loop, even the indirect loop, depending on the piping.
hot_rod