help

Jim Eastman_2

You need to have iso valves on the supply and return. This is required by code. If your boiler feed/make-up water connection is on the supply side (perhaps at the expansion tank location) you could place a boiler drain on the return piping just before the isolation valve on the return. Then you can attach a hose to that drain, close the iso valve on the return, and purge each individual zone by successively opening the valves (one at a time) to purge the air from the zones. Works great and you only have to hook the hose up to one drain fitting!

New Install

Purging

I'm Having Problems Purging Baseboards after a install. Should I install a isolation valve on the supply and return ? Both the supply and return are split loops. going to 4 seperate zone with zone valves. The supply splits of in two directions and the return comes back into a split back to the boiler. Both are dead head "T" in both directions. Thanks for the help

New Install

Jim thanks for the post. We did install a purge station on the return side of the system. Even when I isolated the boiler and opened the loop to drain, I couldn't seem to purge hot water through the boiler and loop. Ive purged a few systems before, this ones got me tied up. It's a Laars Endurance, I'm not sure if the problem stems from the fact that there is no way to isolate the supply split "T" and the return Split "T". It feeds 4 zones with zone valves. Any Ideas would be appreciated.

Paul B._2

Purging Zones

Are you still getting alot of air back at the purging station, or just not getting flow out to the zones?

I'd try to open one zone, and see if you can get flow out to that zone.

An Endurance 110 will support two zones of 3/4" baseboard 67' long off the internal circulator.

An Endurance 175 will support 4 zones.

I'm trying to determine if it's an air problem, or just that the circulator can't move enough water.

Sincerely,

Paul B.

New Install

I'm starting to think I purged all the air out of the zones. I was just getting cold water back at the purge station and it had me stumped. I'm used to working on oil boilers and when you purge a boiler on high limit, for the most part you can push hot water threw the loops. Looking at the install manual I noticed the diagram with the view of the inside boiler along with the internal loop around the tank with the venturi loop. I figured maybe I was just pushing cold water around the system bypassing the hot water tank.

RoosterBoy

when i do it on a new baseboard install i have a purge valve above the ball valve on the return loop. of each zone

so i close the ball valve on the return at the same time i open the purge valve above it with the pump running it pushes the water out the purge valve and gets the baseboards going.

when it stops spitting and i feel heat on the return then i close the purge valve wile opening up the ball valve below it.

and my spirovent on the whole system takes care of the rest