Service and Repair Manual

ManualsBrandsBunn-O-Matic ManualsCommercial Beverage Equipment16 Inch 3 Gallons Beverage Dispenser

SERVICE (CONT.)

Liquid Autoﬁll System

Location:

Under each hopper motor cover there are two

constant ﬂow (CF) valves, one for water and one for

syrup. Located on top of the cover is a needle valve for

adjusting water ﬂow.

Test Procedure:

The water screw adjustment valve is used to set the

product mix ratio, but only as long as the incoming

water pressure is between 30-80 psi. Rotate the

adjustment screw with a standard screwdriver.

Turning the screw clockwise will decrease the water

ﬂow and counter-clockwise will increase water ﬂow.

NOTE: If water source is not within the speciﬁcation

of water pressure requirement(s), a water booster

pump will need to be installed and adjusted to

maintain the 30 to 80 psi requirement.

CO2 Tank with Pressure Regulator is an alternate

source used in conjunction with syrup CO2 pumps

to move bag-in-box syrup product. Several factors

are involved when setting the actual pressure be-

cause of product viscosities, length and positioning

of lines (vertical or horizontal). Optimal psi range

is 40-80. A typical set point is 65 psi.

Check for voltage at the Water valve solenoid between

the WHT and WHT/YEL wires. The reading should be 120

vac for 120V machines, or 230 vac for 230V machines.

Check for voltage at the Syrup valve solenoid between

the WHT and WHT/YEL wires. The reading should be 120

vac for 120V machines, or 230 vac for 230V machines.

If voltage is not present as indicated, replace solenoid

valve(s).

Removal and Replacement:

1. Shut off and disconnect the product and water

supply lines to the solenoid valves.

2. Disconnect the product and water supply lines to

the hopper from the solenoid valves.

3. Remove the auger motor cover.

4. Remove WHI and WHT/YEL wires from solenoid

valve.

5. Remove YEL and WHT/YEL wires from the pressure

switch.

6. Replace the faulty solenoid valve with new valve.

7. Reconnect WHI and WHT/YEL wires to solenoid

valve.

8. Reconnect YEL and WHT/YEL wires to the pressure

switch.

9. Reinstall auger motor cover.

10. Reconnect the supply lines from the solenoid valves

to the hopper.

11. Reconnect the water and syrup supply lines to the

solenoid valves.

12. Turn on the water and syrup supply.

13. Inspect for leaks.

FIG. 69 SOLENOID WIRING CONNECTIONS

WHT/YEL

WHT

YEL

41084 081216