Best Of
Re: building a pasteurizer
This is what you want to design:
Instead of a big HX to the boiler only, you have a large one between the fluid coming in and returning (recovery hx in the picture). This captures the heat from the pasturised fluid and uses it to pre-heat the cold supply. This then goes the boiler HX where the pasteurization happens. You'll need a length of tube after this to allow time for pasteurization.
If the recovery HX is efficient enough (that is approach temp at your flow rates/temps), you need very little boiler power and chiller at the end.
Kaos
Re: Help with hydronic piping to reduce hammer from circ pump
I don't know of any spring return ZV that breaks the end switch instantly. Either a cam has to move off the micro switch, or the magnet away from the reed switch in the Caleffi. But no more that a few seconds for that to happen, during maybe a 7 second to complete close off.
I know PABs work, but I'll see if they work with ∆P circs. As a zone valve closes, the PAB bypass opens, so the circ may think another zone is opening and speed up, not slow down??
I would think the expansion tank behaves like a water hammer trapped air space. The only difference is the water hammer arrester could be right at the ZV.
But it shouldn't take this much technology!
hot_rod
Re: New Home Laars Combi Boiler
The intake screen could be clogged on the unit. Check that next. Mad Dog
Re: My proposed Install
nope, it is just in series with the two other circs, doubling the head
One circ after the air sep and two zone valves is another option
A delta P circ would modulate flow as the zv open and close
hot_rod
Re: Wrestit wrench
Retired guy. When I need to get a really tight screw fitting off a loose piece of pipe with no Ridgid Tristand around, I'll lay a wrench in it's back like that and then scissor bite the joint.
Alot of times, the wrench on its back will move or fall over. This white wrench with the Wings is perfect for this. Mad Dog
Re: Wrestit wrench
Rap wrench is just a chunky bossing you can Whale on with a lump hammer. This white wrench looks like it has "wings" that allow the wrench to stand up on it's own so you can use the opposing wrench in a scissor bite. I love it..Yes..Ridgid tool should definitely offer this....Mad Dog
Re: Confused - Hydronic air handler VS heat pump VS heat pump plus furnance
Do not call that person back. Neither a boiler nor furnace nor electric strips dry out your home’s air in this configuration. Your home’s air is dry in the winter because winter outside air is dry and is making its way inside. So no, a boiler attached to a hydronic coil will not keep the home more comfortable. That is snake oil!
Either a furnace or boiler can be attached to a ducted heat pump. Generally, a boiler is more expensive and more complex for the task, so isn’t usually chosen.
If your home is dry, seal the leaks. You can also add a humidifier. You’ll notice that during the summer, an air conditioner drains water OUT of the home. That actually removes humidity. A furnace/boiler/heat pump do not drain during the winter.
Re: When to NOT use sharkbite? A question
To each his own: some of us were taught doing the best job possible irrespective of how "hard" it is. Others were taught "just get it done..its good enough" Different philosophies of life. Mad Dog
Re: DHW Check valves
swing checks need a pressure differential to close tightly, spring checks do not
Swing checks have a long travel distance which can lead to chatter or banging
All checks should be sized by the Cv number not the pipe size.
If a check is oversized it may not be opening fully
Horizontal, 6” or more from a pump discharge is best. Some brands can be vertical.
Any check used for DHW needs to be low lead.
Are you having trouble with the checks?
hot_rod
Re: Repair or Replace Gas Boiler
You should probably stick with the same type boiler if it worked. Larrs or RayPac also make them
