4
1. PRINCIPLE OF OPERATION
S1
S1
S2
S2
Circuit Board
Water
Syrup Chamber
Piston
Syrup Solenoids
Components:
Flowmeter
Flow Washer
W1
W1
Nozzle
Water
Syrup
Measuring
System
Solenoid
Injecting
System
A.
Three systems in the Volumetric Valve work together to maintain an accurate syrup to water ratio:
• The circuit board with its computer.
• The water measuring system.
• The syrup injecting system.
B. Set the ratio by using the hand held programmer (Lancer PN 52-1420/02; CCPN 532179).
C. When a customer activates the valve, the water starts flowing to the nozzle. The flow washer en-
sures that the water does not flow too fast.
D. The paddle wheel in the flowmeter begins to spin, sending signals to the circuit board (see below).
E. The computer on the circuit board monitors the signals and determines when to inject syrup into the
water stream. The circuit board energizes one syrup solenoid and then the other. This alternating
action injects a metered amount of syrup into the water. This happens seven to eight (7-8) times a
second (see Fig. 2 and 3).
F.
The circuit board indicates which solenoid is activated with the LEDs mounted on the front of the
board. The green LED corresponds to the water solenoid and the red LEDs correspond to the syrup
solenoids.
S1
S1
S2
S2
FIGURE 1. COMPONENTS
FIGURE 2. OPERATION DIAGRAM - VALVE ON
FIGURE 3. OPERATION DIAGRAM - VALVE ON
