Hydronic Zones Get Some Heat When Not Called - Plumbing - DIY Home Improvement | DIYChatroom


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 12-21-2010, 04:40 PM   #1
Newbie
 
Join Date: Dec 2010
Posts: 4
Rewards Points: 10
Default

hydronic zones get some heat when not called


I have a hydronic heating system with six zones operated by six pumps. I have noticed that when one (any) zone calls for heat there is a small flow to all the zones. This is particularly a problem when I try try to heat up my garage shop because it takes several hours to bring up the heat up about 20 degrees and in the meantime the rest of the house gets hot. I can only assume that some of the hot mix seeps through the other wet rotors that are not active. I am wondering if there is some way to prevent this from happening?

Advertisement

1619Farm is offline   Reply With Quote
Old 12-21-2010, 06:46 PM   #2
Licensed Master Plumber
 
Join Date: Dec 2009
Location: New Hampshire
Posts: 476
Rewards Points: 250
Default

hydronic zones get some heat when not called


Should be flow check valves installed on the outlets, are there?

Advertisement

__________________
Always ask to see your contractors license!
NHMaster is offline   Reply With Quote
Old 12-21-2010, 06:48 PM   #3
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,976
Rewards Points: 2,048
Default

hydronic zones get some heat when not called


Yes there is some small flow through the zones that azre not calling for heat.

In most systems this does not cause any inconvenience.

To stop this seepage you need to install (electrically powered) valves that physically shut off the zones not calling for heat.
__________________
Forget super sized fries. The Washington Redskins could promote healthy eating with First Lady Obama by choosing a (red skinned) turnip for a mascot.
AllanJ is offline   Reply With Quote
Old 12-21-2010, 08:17 PM   #4
Newbie
 
Join Date: Dec 2010
Posts: 4
Rewards Points: 10
Default

hydronic zones get some heat when not called


Quote:
Originally Posted by NHMaster View Post
Should be flow check valves installed on the outlets, are there?
No. I will have my plumber install them. Thanks!
1619Farm is offline   Reply With Quote
Old 12-21-2010, 08:24 PM   #5
Newbie
 
Join Date: Dec 2010
Posts: 4
Rewards Points: 10
Default

hydronic zones get some heat when not called


Quote:
Originally Posted by AllanJ View Post
Yes there is some small flow through the zones that azre not calling for heat.

In most systems this does not cause any inconvenience.

To stop this seepage you need to install (electrically powered) valves that physically shut off the zones not calling for heat.

Is there some advantage to installing relay controlled valves, or are mechanical check valves enough? Right now I have no check, and some parts of the house get up to 5 degrees above my thermostat set points when the furnace is working to heat somewhere else.
1619Farm is offline   Reply With Quote
Old 12-21-2010, 09:31 PM   #6
Master General ReEngineer
 
Bondo's Avatar
 
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 3,830
Rewards Points: 2,294
Default

hydronic zones get some heat when not called


Ayuh,... I've had good luck with spring check valves for stopping ghost flows,...

The system I just put in my rental has the check valves built right into the circulator pumps...
Bondo is offline   Reply With Quote
Old 12-22-2010, 09:31 AM   #7
Newbie
 
Join Date: Dec 2010
Posts: 4
Rewards Points: 10
Default

hydronic zones get some heat when not called


Quote:
Originally Posted by Bondo View Post
Ayuh,... I've had good luck with spring check valves for stopping ghost flows,...

The system I just put in my rental has the check valves built right into the circulator pumps...
My Grundfos pumps do not have check valves. I will be installing Taco Flo-check valves soon. Thanks to all who helped.
1619Farm is offline   Reply With Quote
Old 12-22-2010, 10:28 AM   #8
Master General ReEngineer
 
Bondo's Avatar
 
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 3,830
Rewards Points: 2,294
Default

hydronic zones get some heat when not called


Quote:
Originally Posted by 1619Farm View Post
My Grundfos pumps do not have check valves. I will be installing Taco Flo-check valves soon. Thanks to all who helped.
Ayuh,... Mine are new Grundfos,...
Maybe it might be worth checking to see if the check valves can be retrofit to your pumps....
The valve just pops into the pump's outlet...

Advertisement

Bondo is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
VisionPRO Setup Functions & Heat Pump infoskr HVAC 42 11-16-2014 06:30 PM
Hydronic Radiant Floor Heat KGP HVAC 22 05-02-2011 09:31 AM
Getting a House..heatpump or no? DavidsCPU HVAC 10 02-07-2010 11:22 PM
Which honeywell thermostat should I buy for my Carrier heat pump? mannypp HVAC 29 01-30-2010 03:21 PM
Heat source for hydronic radiant floor heating mattedfred HVAC 1 11-19-2008 06:58 PM




Top of Page | View New Posts