Vollrath U431 Water Cooled - Manual (Page 19)

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3.12 MIX PUMP CLEANING
NOTICE
Any cleaning procedure must always be followed
by sanitizing before fi lling machine with mix.
The mix pump is approved for CIP (clean in place). It is
thoroughly cleaned when the detergent solution is pumped
through the machine. We recommend completely disas-
sembling the pump and disconnecting tubing every 14
days for inspection of parts to confi rm the CIP has been
properly performed. If any residue is detected, clean or
replace those parts as outlined below.
A. With the machine fi lled with mix, press the Clean
button. Allow the auger to agitate for 5 to 10
minutes.
B. Remove the suction tube from the mix container.
Open the spigot to remove the mix remaining in
the freezing cylinder.
C. Pump 2 gallons (7.5 liters) of potable water through
machine until the water coming out of the spigot
is clear.
D. Pump 2 gallons (7.5 liters) of 90° to 110°F (32°C
to 43°C) detergent solution through the machine.
The use of soft water is recommended, along with
dishwashing detergents such as “Joy,” “Dawn,”
or equivalent.
E. Press the Pump button to turn the pump Off. Open
the spigot to relieve the remaining pressure.
F. Press the Clean button to stop the cleaning cycle
and press the On/Off button for the cylinder to
turn it Off.
3.13 DISASSEMBLY AND INSPECTION OF
REMOVABLE PARTS
Inspection of removable parts should be made whenever
maintenance is performed or when the pump requires
disassembly.
NOTE
If the mix line or air line is diffi cult to remove, soften
the tubing with a rag soaked in hot water. Hose
connections may be sprayed with Haynes Sanitary
Lubricant for ease of removal.
WARNING
Hazardous Moving Parts
Revolving pump head can grab, mangle, and cause
serious crushing injury. Make sure the display
shows the freezing cylinders and pump are off. If
they are not, press the On/Off button and Pump
button to turn them off.
CAUTION
System Under Pressure
Never disconnect hoses from the machine or the
pump without fi rst opening the spigot to relieve
pressure.
A. Loosen the clamp and remove the air hose from
the pump compressor.
B. Loosen the clamp and disconnect the mix pump
hose. Remove the pickup hose, and the mix
pickup assembly from the mix container.
C. Completely disassemble the hose assembly and
the check valve (Fig. 3-10). Place hoses, tee,
check valve assembly, and pickup hose adapter in
90° to 110°F (32°C to 43°C) mild detergent water
and wash thoroughly. Use soft bristle brushes to
clean inside of fi ttings. Rinse all parts in clean
90° to 110°F (32°C to 43°C) water.
D. Carefully inspect each part for wear or damage.
Replace worn or damaged parts.
E. Wash the mix tube and the air tube in the cabinet
with 90° to 110°F detergent water and brushes
provided. Rinse with clean, 90° to 110°F water.
F. Prepare two gallons (7.5 liters) of sanitizing
solution using a USDA certifi ed grade sanitizing
solution. Sanitize all removed parts. Allow them
to air dry.
G. Reassemble both hose assemblies per the
diagram located on the inside of the cab door.
Reconnect the assemblies to the pump hose and
the discharge hose, using the clamps. (Refer to
Section 2.5 Mix Pump).
H. Sanitize assembled machine as per instructions
outlined in Section 3.11.
Figure 3-10 Mix Pump Removable Parts