rgtech
Electrical
- Jan 17, 2014
- 2
We have a 300l tank solar water heater installed with an assistant tank. Please refer to link below for model of solar water heater.
The assistant tank's purpose is for automatic filling of the 300L non-pressure tank. When the 300L tank is full, water rises in the assistant tank and closes the valve on the in incoming supply pipe.
The problem we have us that the ballcock in the assistant tank expands and water is getting inside. (This is not supposed to happen) Since the ballcock gets heavy, it no longer closes the valve. Hence we are having overflow problem.
This is the first time that we have such a problem. Can anyone explain to us why water is getting inside the ballcock as physically it is a sealed body?
Also I suspect the assistant tank volume which is about 3L is too small for a 300L system. Since the water in the 300L tank gets heated up and expansion volume from 20 deg to say 70 deg will be more than 3L, there is a built-up of pressure inside the assistant tank. Does this make sense? Could this be causing water ingress inside the ballcock?
Amy ideas on what could be happening would help us a lot.
Thanks
The assistant tank's purpose is for automatic filling of the 300L non-pressure tank. When the 300L tank is full, water rises in the assistant tank and closes the valve on the in incoming supply pipe.
The problem we have us that the ballcock in the assistant tank expands and water is getting inside. (This is not supposed to happen) Since the ballcock gets heavy, it no longer closes the valve. Hence we are having overflow problem.
This is the first time that we have such a problem. Can anyone explain to us why water is getting inside the ballcock as physically it is a sealed body?
Also I suspect the assistant tank volume which is about 3L is too small for a 300L system. Since the water in the 300L tank gets heated up and expansion volume from 20 deg to say 70 deg will be more than 3L, there is a built-up of pressure inside the assistant tank. Does this make sense? Could this be causing water ingress inside the ballcock?
Amy ideas on what could be happening would help us a lot.
Thanks