Thanks Sarge.
God Bless America, ßill O|||||||O
http://www.billhughes.com/


Sarge wrote:
>
> Water is not the refrigerant. The water is used instead of air on the
> condenser. Water is used in a lot of system that have a high heat load.
> The water helps condense the refrigerant back into a liquid after it has
> been compressed. The liquid refrigerant then passes through a metering
> device (capillary tube, orifice, expansion valve) to feed the evaporator.
> The air that passes over the evaporator transfers heat with the refrigerant.
> This turns the freon back to a gas. It then gets compressed again and the
> cycle starts over.
>
> If water is used on the condenser, the water is either disposed or recycled
> in a closed loop system. Water can come from the city supply and use to
> supply water to your water heater. What not used is sent to the sewer,
> drain or pumped into the ground. If ground water is used, water is pumped
> to the condenser and back to the ground.
>
> If the system is closed loop, the water is circulated from the condenser in
> to a tower called a cooling water tower. Air then cools the water back off
> and it is pumped back to system. Make up water is needed and the water must
> be chemically treated to prevent algae and conductivity problems with the
> metal. The cooling water tower usually has a fan that pulls air upward
> while the water drains downward.
>
> These type of system are used where they may be one unit supplying multiple
> evaporators. This allows individual zones to be adjust their temperature
> without affecting other zones. In order for the unit to run properly there
> is probably a spill back line that is adjusted to allow minimum refrigerant
> flow yet will close down when a load is needed, This is one problem area on
> the units is the spill back valve. They can stick in one position thus
> causing HVAC problems.
>
> Sarge