Here is part two! kzbin.info/www/bejne/aGiXaaN3ra6UrbM Thank you for your patience!

We are referring to the boiler technology in the firing rate. Many of the newer wall-hung type boilers have a turn down ratio. For our example of 10-1, if the maximum btu firing rate was 100,000 BTUs per hour, then the lowest would be 10,000 BTUs per hour.

The 4 and 8 is referencing pipe diameter so if you have 1" pipe, it would mean 4" and 8". Anyway, the 4 and 8 references before any other fitting in the pipe whether it is a tee, elbow, coupling or even a valve. This design is to have the proper type of flow internally as well as the hydraulic isolation desired.

@@TacoHVACtv I was meant to ask 4x and 8x. Nevertheless, you have addressed the question for me. Many thanks! 😁👍

You're welcome!

There are so many ways to control a hydronic system and as long as the end result is achieved, go for it!

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Amen!

First of all, thanks for watching our Taco Tuesday webinars. Th answer your question, in order to find the pressure drop of this device, the manufacturer gave us the data in Cv. Cv is the amount of flow in gpm through a device that will yield a 1 psi loss. The formula to find that pressure drop in foot of head is: Pressure drop = (calculated flow/Cv)squared x 2.31. This example, the calculated flow is 61.5 gpm, the Cv is 50 therfore, pressure drop = (61.5/50)squared x 2.31 I hope this helps

@@TacoHVACtv Thanks for the reply! However I still have trouble understanding. Let's break it down. A Cv of 50 means 50 gpm will yield a drop of 1 psi. If 50 gpm will yield 1 psi, how much psi will 61.5 gpm yield? Well it should be 61.5 gpm / 50 gpm * 1 psi = 1.23 psi = 2.84 ft?

The formula to find the pressure drop based upon Cv = ((flow/Cv)squared x 2.31 =50/65 squared x 2.31 = 3.9 ft of head You missed the square part and multiply by 2.31

Thanks for watching episode 1 of Taco After Dark, greatly appreciated. When it comes to a heat loss in a room with a vaulted ceiling, the first part of our calculations in the air infiltration, you need to find the cubic foot of air in the room to perform the proper calculation. We can break out the geometry lessons from high school to find it or we can do an average, remember our calculations in this exercise are approximates and have alot of assumptions that will help us on the high side of the numbers. Same would be true of the outside walls that have exposure with the vaulted ceiling. For example, if the outside wall had a vault to it (one side was 8' high and the opposite side was 12', you could assume the wall to be 10' high and get close to the calculation. or break the wall into two pieces, a wall 8' high and a triangle (geometry) and add the numbers together

You are very welcome and I hope it gets corrected. As for the surface temperature of the 007, yes they get hot. It is pumping 180F degree fluid and that water is designed to lubricate and cool the bearings. So a high surface temperature is normal

@@TacoHVACtv Hope to get to it soon. I'll let you know how it goes.

Thanks for watching one of our Taco Tuesday webinars, greatly appreciated. You have a few questions here I will address. 1. Circulator placement in regards to the boiler can be an installer preference or wherever the expansion tank is placed in the system. The boiler ports will also be labeled as supply or return. Reversing that flow is not recommended unless the boiler manufacturer explicitly says you can, I will assume you shouldn't due to the labels on the boiler. The "Supply" port is the supply out to the house and water should be leaving the boiler here. "Return" will be water that has given up its heat to the house to be reheated. Confirm the direction with the installation. There is also a directional arrow on the circulator 2. I don't know if your system is piped correctly nor do I know if you would get better performance and use less gas if it piped backwards. That would be a better question for the boiler manufacturer. The electricity consumption would be the same, a 007 uses about $30-40 of electricity a winter. There are option for the newer ECM variable speed circulators like the 007e that could cut electrical consumption quite a bit especially in a system like your with zone valves. 3. The heat you are getting on the house when the circulator is not working is what we call "gravity flow." Hot water will rise and cold water will fall in the heating pipes since the boiler is in the basement and the heating zones are above it. You don't get hot water since the indirect tank is probably on the same level as the boiler. 4. Water hammer in the plumbing in the house is not due to the boiler or the circulators but you could add an expansion tank or water hammer arrestors in the plumbing pipes to alleviate the noise. 5. Now this wasn't a direct question, but if you are looking for more fuel economy, consider adding and weather responsive controller that could modulate the boiler temperature. Depending upon the controller used for your zone valves, it could be a simple add-on controller we call the PC-700 pulse.ly/m2cn26vz9x And then the last comment I have is about having to replace your circulators. Please confirm the direction it is pumping in, maybe with a hydronic professional and also consider taking a look at the water quality that may be causing the premature failures of your circulators. If you need to find someone in your area to help, take a look here pulse.ly/aenbvogm9w

We apologize for the delay in getting back to you about this. Here is a link for that video apps.taco-hvac.com/training/Change_Mechanical_Seal_TA_Pump/learn.html

@@TacoHVACtv this is great, thank you

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Thank you!

You are welcome! Let us know if you need anything1

@@TacoHVACtvactually, yes. Im looking to do manifold home-run setup for finned baseboard heaters in a zone, that way all heaters get same inlet temp as opposed to diminished inlet temps in the present series configuration. Is there a guide for calculating sizing for supply/return for the manifold, and the individual pipes for each home-run? thank you.

@timp.9582 To take this in a different direction than the webinar presented here you may want to take a look at the Taco After Dark series that will walk you though all of the steps needed. For your particular project, watch episodes 1-3. Episode 1 discusses heat loss and how to calculate it, Episode 2 reviews heat emitters and how to size them and then episode 3 with review how to size the pipe based upon the calculated flow rate needed that you found in 1 and 2. Take a look here and look for Taco After Darkpulse.ly/wya36goptv

@@TacoHVACtvThank you for your reply. The heat loss is informative, did it years ago, but it doesnt hurt to have a re-review of it. Ya'll have done a fantastic job with all of these workshops/webinars. BTW, i see Dave Holdorff is one of the trainers. Dave was 3yrs ahead of me at Ft Schuyler.

@@timp.9582 Hey Tim, this is a much different way of learning about heat transfer than in the days in the Bronx, deck or engine?

We are so glad you enjoyed your experience! Our team of experts strives to put out educational and fun content. Glad to have you aboard!

@bryanswanson5007, first off, thanks for watching Taco Tuesday, greatly appreciated. To answer your question, it is suggested to take off for the DHW indirect tank tank first to allow all of the energy the boiler is making goes to generating hot water for the house. It will depend upon several factors like the size of the indirect tank and the size of the boiler. It may also lie with the control sequence that the boiler manufacturer has in their control logic. And that is the beauty of hydronic heating, we have lots of options to achieve the same thing!

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@abacojack13 Thanks for watching Taco Tuesday, greatly appreciated. There are several ways this wiring can be completed. The first is if the manifolds are remotely located. I would install a zone valve controller (ZVC) at each manifold location, thermostats and actuators wired at that location. Then take the end switch wire from each ZVC and bring it to the mechanical room where the circulators are. At that point, you would need a switching relay (SR) to handle the 4 circs. That end switch wire will then go to the TT terminal for the corresponding circ.

The second way is if the manifolds are near the circulators, then you would need a ZVC for each manifold and the corresponding circ would then be wired to the ZVC

The 0015e3 is a much smaller circulator than the 2400wb. The high efficiency model that is equivalent would be the 0034e. However, you should check with the boiler manufacturer if this circulator is adequate for the flow and head needed

The pressure differential will depend upon what circulator and what setting it is in. If pumping away from expansion tank, the suction would be 20psi and if pumping into the expansion tank, the pressure at the discharge would be 20 psi. The corresponding discharge and suction would be dependent of the circ

Many thanks@@TacoHVACtv

No Problem!

If you are looking to install the sensor for the SmartPlug, it will go on the hot water supply that feeds the fixtures in your home. Not to close to the water heater, at least 18” away is minimum distance

Hi! Thank you for watching.

That is where the math is most important that you have selected the correct circulator to handle all three zones. Doing the math will reveal what flowrate is needed for each zone, adding them together as well as calculating the associated head loss for each zone. The math in this webinar starts at the 9 minute mark.

Jeriah, There are several manufacturers of buffer/DHW tanks out there. Why are they not more common? As we see the trend of low temperature hydronic heat emitters and space constraints, the popularity of these tanks may rise.

Hello Dave, the boiler manufacturers that we referenced in this presentation are Burnham and Lochinvar, but that does not limit other manufacturers, these are just the two we referenced. We do work with many of the boiler companies and provide variable speed circ to them. However, even though our circs are variable speed, they can be setup as a fixed speed circulator and provide the flow the boiler manufacturer is looking for across the heat exchanger.

Hello Jose, yes of course it is always easier when working with a pump in this condition and yes it is always harder when there is corrosion involved. If all working pumps were in this condition for the entire life of the pump, it would be a perfect world. However, in this video, we wanted to show the correct method and steps to replacing a seal kit. Thanks for watching

Correct, the controller is different. The LeakBreaker with eLink will email and text when there is an activation and moisture sensed at the sensor. Same valve, motor and floor sensor is used between the two.

@@TacoHVACtvThank you!

You are welcome!

We miss him dearly. Thank you for the kind words. ♥️

Hi Pete, I have the very same thing in my house, you can have your zoning with zone valves as well as circulators. However what is not typical is that on a zone, you should need a zone valve AND a circulator. I have seen installations like this and it installed in this manner to prevent gravity hot water flow in a zone when that zone was not calling for heat. The zone valve acted as a positive shut off. I would have installed a check valve on the system after the zone circulator. If you have further questions, please don't hesitate to contact our Technical Services Team at Taco.

You are welcome!

Thank you, David!

Hi Austin!

Thanks for watching the Taco Tuesday webinar. Austin, pressure drop is the number we calculate for the frictional losses of the piping system when trying to move the water through those pipes. It includes the length of pipe, any fittings and valves as well as any other components in the system.

Hi Munir! We always recommend that an NPSHa (Net Positive Suction Head available) calculation be performed on all system types (including closed-loop systems).

Hi Christopher! Our presentations are only available to our team members and reps. Is there something specific you need more information on?

We got you!

Indirect tanks for hot water generation connected to a boiler have specifications based upon the amount of hot water it can generate. The biggest factor is the size of the boiler. Most residential boilers are just big enough to handle one indirect tank for a family. Adding two; the size of the boiler must be calculated properly in order to handle the load in order to create enough capacity. Let us know where you are from and maybe we can connect you with a contractor we know in your area that can help.