Hydronic heating system question
Posted: Fri Apr 02, 2021 1:13 pm
Hello all,
We have a hydronic heating system (3 zones) on our boat with a relatively new Espar D5. Please see the pic attached. Someone has installed these Watts 150psi pressure relief valves perhaps as an auto bleed above the supply and return to the Espar. These are located adjacent and above the aft cabin coil but below the system expansion tank. Therefore not the highest point of the system (the tank is). For context they are above the salon coil and possibly at or slightly above the fore cabin coil. These Watts valves dont look at all marine to me and they are failing and slowly emitting coolant without the system running and will leak with any warmer change in ambient temperature.
My question is, should any auto bleed be in this location at all given the tank is highest and if it is advisable what devise would be recommended?
I do not see a bleed screw on the Espar but I do see where the coils bleed.
Thank-you
We have a hydronic heating system (3 zones) on our boat with a relatively new Espar D5. Please see the pic attached. Someone has installed these Watts 150psi pressure relief valves perhaps as an auto bleed above the supply and return to the Espar. These are located adjacent and above the aft cabin coil but below the system expansion tank. Therefore not the highest point of the system (the tank is). For context they are above the salon coil and possibly at or slightly above the fore cabin coil. These Watts valves dont look at all marine to me and they are failing and slowly emitting coolant without the system running and will leak with any warmer change in ambient temperature.
My question is, should any auto bleed be in this location at all given the tank is highest and if it is advisable what devise would be recommended?
I do not see a bleed screw on the Espar but I do see where the coils bleed.
Thank-you