Purging system

Resnick_3

Hi Everyone,

Hope you can help. I have a quick question about the purging of air in a heating system. I have a boiler with two zones. One going to the basement and the other to the first floor. Let me describe the loop on the boiler as I see it:

On the supply side the pipe go to -> the scoop w/ the expansion -> to a spliter - "Y" shape pipe -> each end has a zone valve (old looking) -> to the respective zone. On the return side > each pipe go to it's own purge valve -> to it's own shut-off valve -> then they are joined with a "Y" shape pipe -> which go to the circular pump -> then to boiler.

Now, to my question: I'm trying to purge the system but the water does not seem to circulate?.

Here is what I do:

1. I close both shut-off valve
2. Attach a hose to the purge valve for the zone I want to purge and open it
3. I open the pressure valve to allow more/faster water
4. Look at the pressure gage to make sure it does not go to high. I let it go up to 30lb or a couple of lb extra.
5 But only a little water comes out and I see the pressure rising.

should I let the water pressure rise a little more? Or could there be something wrong? When I open the shut-off valve and let the boiler turn on I can hear the water circulate but I hear the water flowing sound. Please let me know if I'm doing something wrong.

kevin_60

purging

sounds like the zone valves are in closed position. Shut off power to system, Open valves to manuel open then purge.

bob young

BLEED PROCEDURE

SHUT ELECTRIC , OPEN ZONE VALVES MANUALLY . SHUT CONTROL VALVES BEFORE PUMP BLEED THROUGH INDIVIDUAL HOSE COCKS , ONE AT A TIME. AS PRESSURE DROPS, OPEN MANUAL SUPPLY BYPASS TO RESTORE PRESSURE. THATS IT. OPEN CONTROL VALVES , RESET ZONE VALVES TO AUTOMATIC, ENERGIZE SYSTEM , RESET THERMOSTAT. CRACK A BECKS DARK ALE . ENJOY

Resnick

Thank you Kevin for the reply. I have two follow up questions:

1. To shut off power to system, can I simply flip the emergency switch? or do I have to do something else?.


2. How do I set the zone valve to manual open? From the picture of a similar zone valve (see below URL), it looks like I can just lower the little lever on the side(to open)? is that correct? and do I have to set it to manual open before I shutdown power to system?


http://images.google.com/imgres?imgurl=http://www.masterplumber.net/images/HPIM1389.JPG&imgrefurl=http://www.masterplumber.net/taco_zone.htm&usg=__L4dOVfuN_TmEzUwVcAJHXE5P6mM=&h=553&w=737&sz=91&hl=en&start=9&um=1&tbnid=3lFPkXZTRGqi-M:&tbnh=106&tbnw=141&prev=/images?q=zone+valve&um=1&hl=en&sa=N


Thanks.

Rich Kontny_3

Perhaps

This time you should call in a professional and ask if you could watch the procedure.This way you will be shown the proper way.