In this dataset are active Fan Powered Boxes with hydronic coils. These fan powered boxes are smart parts and are adding up the air flow from their air
systems and based on that data, calculating and “pushing” GPM flow to the piping system. This is a very common application for an HVAC designer
and one that requires hundreds of calculations. In addition, in the penthouse, is a set of end suction pumps that will be used to circulate the hot water.
There would also be envisioned a primary loop for several hot water boilers, but for the purpose of this lesson, the primary loop will be ignored. I will tile
these two views. Both the pumps and the FPBs have a hydronic supply, and a hydronic return connector type. This gets a little confusing. The
HVAC Piping Designer has forever called this “system” the Heating System. It is just one thing. In Revit MEP, this system is actually two systems. It is
the supply system, and the return system. So, for the first system, the supply side, the pump discharge is the parent, the supply inlets on the
boxes are the children. For the second system, the return side, the pump suction is the parent, and the return outlets are the children. I will create two
systems, one named HWS, and another named HWR. These system names will be used for filtering. In this view, Revit will look at all the piping
in the view, and any pipe, pipe accessory, or pipe fitting that has a system NAME that equals HWS will be turned red. The same will be true for HWR,
only it will also change the linetype to be dashed. To create a named system, select a child object, in this case it is a FPB. In the contextual ribbon panel,
under the Create Systems panel, pick the piping button. This will bring up a dialogue box called Create Piping System. Here I can choose the
system type and give the system a name. Here, I will enter in the name I want. This is “HWS”. I will then select ok. Next, select the Edit System button
from the System Tools palette in the Piping Systems contextual ribbon. This brings up the Edit Piping System contextual ribbon which gives us all
of the options to setting up a system. Note that everything on the screen has also gone dark with most objects faint. The only highlighted object is the
FPB. This is a “selection mode” that only highlights the selected objects. Let’s take a look at the contextual ribbon. Under the Edit Piping System
panel, there are three buttons. The first, is “Add to System”, what this is referring to, but doesn’t really say is “Add CHILD to system”, the “Remove from
System” is actually saying “Remove CHILD from system”, and “Selecting Equipment” should really say “Add PARENT to system”. So, to add children,
I will select all of the fan powered boxes. I will then select the green “Finish Editing System”. I will now select a box again, and this time a “Piping
Systems” contextual tab is visible. Activate this tab. This activates the piping systems contextual tab, now with HWS under the system selector
highlighted, select the Select Equipment button. I will select the pump that will be the parent. Notice that the pumps that come with Revit OOB are setup
to be “global” pumps. That means that they can be used for any pumped system. I have changed these already so that the discharge is a Hydronic Supply
connector, and the suction is a Hydronic Return connector. You’ll have to do to this to get these to work best. Notice that when I select a piece of
equipment on the HWS piping system and select the Piping Systems tab, I can select the Edit Type properties button. This is where I can specify the
fluid type. Revit comes imbedded with a series of fluid types, namely water and a various percentages of glycol solutions. You can set your
own up if you have some crazy kind of fluid solution being pumped around. But that’s out of