Free Flow Line - Jenn-Air JDB9600AW Technical Education

3.10

Free flow line

1 Free flow line
2 Air equalisation opening
The free flow line is a water bend with an opening.
The curved shape accelerates the water which flows past the opening.
As a result, almost no water can escape through the opening even at
a low water pressure. If water nevertheless escapes, it flows into the
appliance. In the case of appliances up to FD8903 the water runs into
the tank via the expansion opening. With FD8904 a lug was inserted
into the heat exchanger. Escaping water flows into the heat exchanger.
This measure is stipulated by the deutsche Vereinigung des Gas- und
Wasserfaches (DVGW).
3 Lug
If there is low pressure in the water line, water may flow out of the
machine into the water supply system in the worst case scenario.
Only air is drawn in through the opening in the flow line and the return
flow of water is prevented.
3.10.1 Flow characteristics in the free flow line
1 Air equalisation opening