Navien Combi Boiler System With 3 Zone Valves

[@leonginorivera8309]

Great installation loops , I love it .

[@RSWarriorLuv2LafMcc]

Nice little set up! Thanks for the video.

[@jerrydelvalle973]

Great video! I noticed you didn’t use temperature sensors on the return and supply for the heating system, like you have done on other systems. Is there a particular reason?

[@JimSperanza]

The supply and return sensors are used for the variable speed delta T circulator. This system uses a fixed speed circulator.

[@stevenmahone3511]

Jim, looks great. What is the total weight of the system mounted on the plywood? Two people can 'easily' mount it?

[@JimSperanza]

About 150 lbs. Yes easily can mount it with two people. Best way is to use a temporary 2x4 ledger board to rest the bottom of the system on until the plywood is lagged to the wall studs. Then the bottom 2x4 can be removed.

[@JosephSaeteros-r9j]

I have the same piping i sill like to know hoe to wiring the zone valves

[@erwinperez2889]

We're do you hook up the fresh water in the system?

[@JimSperanza]

@@erwinperez2889 there is an auto fill connection on the bottom.

[@BeeBombard]

Just curious why did you cap the top of each vertical run?

[@JimSperanza]

@BeeBombard allows for future zones to be added. Some customers want that option.

[@guess313]

when usig hot water, does it stop heating - Is there any boiler which heats up both at the same time, hot water and baseboard heating

[@JimSperanza]

@guess313 all combis work this way

[@Djbigb8092]

So I just set up my combi system exactly like this. When I look in the book, it only shows 2 wires needing to be connected to the sentry zone valve(common and normally open). My sentry zone valve states it’s normally closed. It looks like you have more than 2 wires connected to the valve. What else should be connected?

[@Djbigb8092]

I only have 2 zones by the way and both stats are only 2 wire setups

[@JimSperanza]

@Djbigb8092 you only need two wires when connecting to the navien.

[@Djbigb8092]

@@JimSperanza that’s what I thought. Looks like you have more than 3 connected which I started to wonder. In the book, it states sentry should connect to normally open, my valves are actually normally closed so I’m assuming that I use 2 wire and just do common/nc, correct?

[@karriem3261]

What size and model is that boiler?

[@JimSperanza]

NCB-240/110H