Nibe AMS10 - Page 35

4-WAY VALVE FUNCTION
Power disconnected
A B
Vacuum from the suction side
Over pressure from the hot gas side
1.
When the current is broken a spring presses the piston to the left.
2.
This opens the gas pressure to chamber B and releases the pressure in chamber A.
3.
The slide moves to the left which changes how the refrigerant moves. In this case it runs directly from evap-
orator to suction gas.
Power connected
A
B
Vacuum from the suction side
Over pressure from the hot gas side
1.
When the current is switched on a solenoid pulls the piston to the right.
2.
This opens the gas pressure to chamber A and releases the pressure in chamber B.
35Chapter 5 | Component descriptionNIBE AMS10