Vollrath U3-02 - Manual (Page 13)

7
3.1 SAFETY PRECAUTIONS
Do not attempt to operate the U3-02A pump until the safety
precautions and operating instructions in the manual are
read completely and thoroughly understood.
Take notice of all warning labels on the U3-02A pump. The
labels have been put there to help in maintaining a safe
working environment. The labels are designed to with-
stand washing and cleaning. All labels must remain
legible for the life of the mix pump. Warning labels should
be checked periodically to be sure they have not been
removed, painted over, rubbed off, and can be recog-
nized as warning labels.
If replacement labels are needed, indicate the part num-
ber, type of label, location of label, and quantity required.
Mail your name and address to:
STOELTING, LLC
ATTENTION: Customer Service
502 Hwy 67
Kiel, Wisconsin 53042
Labels will be furnished and mailed at no charge.
SAFE OPERATION IS NO ACCIDENT; Observe these
rules:
A. Know the U3-02A pump - read and understand the
Owner’s Manual.
B. Wear proper clothing - avoid loose fitting garments,
and remove watches, rings or jewelry which could
cause a serious accident.
C. Maintain a clean work area - avoid tripping or
slipping by cleaning up the area and keeping it
clean.
D. Stay alert at all times - know which switch, push
button or control you are about to use and what
effect it is going to have.
E. Turn all switches to OFF prior to making any adjust-
ments.
F. Do not attempt to repair or perform maintenance on
the mix pump until the main electrical power has
been disconnected.
G. Do not operate the mix pump if unusual or
excessive noise or vibration occurs.
3.2 PUMP MOTOR SWITCH
The PUMP MOTOR switch (Fig. 4) is located on the mix
pump assembly. When the pump motor switch is placed
in the ON position, the mix pump motor will be actuated
to pump mix into the freezer cylinder. When the set
pressure is reached, the mix pump will shut off automati-
cally. When the pump motor switch is placed in the OFF
position, the mix pump will be inoperative.
SECTION 3
OPERATION INSTRUCTIONS
Figure 4
Pump Motor Switch
NOTE
The mix pump motor is equipped with an internal
overload that will “trip”, disabling the pump when the
motor is overloaded. Consult the trouble shooting
section for corrective information.The internal over-
load will automatically reset after cooling. If the con-
dition continues, contact a qualified service person.
3.3 OPERATION OF U3 MIX PUMP
This section describes the operation of the U3 mix pump.
CAUTION
Risk of Product Damage
Mix pump hose must be repositioned every 1 -2
weeks. Failure to comply will result in reduced mix
pump liquid capacity, dispense stoppage, popping,
and possible mix pump hose leakage. Hose leak-
age may damage the pump roller assembly and void
the factory warranty.
A. Refer to freezer owners manual for the operation of
the freezer.
B. Mix Operation: The peristaltic mix pump contains
one continuous mix pump hose. When looking at
the face of the peristaltic mix pump, the left side of
this hose is the suction or pickup. The right side of
the hose is the discharge. Mix is drawn up the
suction side of the hose and transferred thru the
discharge side to the freezer (Fig. 5).
C. Air Operation: The air compressor operates concur-
rently with the peristaltic mix pump. Air enters thru
an intake check valve on the piston downstroke. The
air is discharged thru an output check valve, and
second check valve on the piston upstroke. The air
and mix join at the tee and then travel to the freezer.