Cf Cfive Solenoid Valves - Laf/Autofill - Bunn Ultra NX Service & Repair Manual

CF CFIVE Solenoid Valves - LAF/Autofill

FIG. 23 CF CFIVE VALVE
Location:
Inside the auger motor cover, two CF CFIVE sole-
noid valve assemblies are present.
WV: Water CF CFIVE Solenoid Valve Assembly
Description:
The LAF system is designed to use an external
Ratio Brix Proportioning Pump that is driven by
pressurized water, allowing the water and product
to be delivered at an exact ratio. When a Bag-in-
Box (B-I-B) container is used, a vacuum shut-off
is needed on the Ratio Brix pump. The pump will
automatically stop operation, when the concentrate
bag is completely evacuated, by closing off the inlet
water. When a new B-I-B is installed, the pump will
automatically resume operation without the need to
prime the system. See "BRIX Pump (Autofill) Instal-
lation" illustration.
Rear Cover Removal:
1. Disconnect power from machine.
2. Lift hopper cover to remove dual inlet fitting
from hopper.
3. Remove 4 screws securing rear cover.
4. Grab cover with water line still connected to the
inlet barb fitting and gently pull cover away from
machine.
Test Procedure:
NOTE: The Dual Inlet Hopper Fitting is removed
from hopper during this Valve Test Procedure to
prevent any unwanted mix ratio entering already
ratio'd product in hopper.
SERVICE - REAR COVER COMPONENTS
Outlet
Inlet
If hopper is empty of product, test can be performed
on valve assemblies with Dual Inlet Hopper Fitting
still installed on empty hopper.
1. Ensure Dual Inlet Fitting removed from hopper
and/or use of temporary extension lines are put
inside an empty bucket for the purpose of
checking the flow of water and syrup.
2. Enter the software program and scroll to main
"Auto Refill" menu.
3. Press the "Right Dot" switch to answer "Yes".
4. Press the "Center Dot" switch to advance onto
"Test Refill" menu.
5. Press the "Right Dot" switch to answer "Yes" to
advance onto "Left Refill Valve" menu.
6. Press the "Left Dot" switch to answer "ON". The
Left Refill Valve will energize to allow water and
syrup flow, press "OFF" by pressing the "Right
Dot" to stop test.
7. Press the "Center Dot" to advance onto "Right
Refill Valve" menu.
8. Press the "Left Dot" switch to answer "ON". The
Right Refill Valve will energize to allow water
and syrup flow, press "OFF" by pressing the
"Right Dot" to stop test.
If you hear a click sound or feel the magnetic
pull on top of the water solenoid valve coil, the
control board output is operating correctly. If
the water or syrup fails to flow, reference the
Brix Pump manufacture manual regarding
Troubleshooting the Brix Pump.
No click sound or magnetic pull, check valve
coil for power.
No power across valve coil - replace control
board.
Electrical Rating:
Ultra NX 120V Models:
CFV CFIVE Solenoid Valve: 24VDC
Ultra NX 200-240V Models:
CFV CFIVE Solenoid Valve: 24VDC
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