Bunn TB3 Operating & Service Manual page 11

TROUBLESHOOTING (cont.)
PROBLEM
Dilution cycle will not start (cont.)
Inconsistent beverage level in
dispenser
Consistently high or low beverage
level in the dispenser
PROBABLE CAUSE
4. Dilution Solenoid Valve
1. Internal Flow Control (.195
GPM)
2. Syphon System
3. Lime Build-up
CAUTION - Tank and tank compo-
nents should be delimed regularly
depending on local water condi-
tions. Excessive mineral build-up
on stainless steel surfaces can
initiate corrosive reactions resulting
in serious leaks.
4. Water Pressure
1. Brew Timer/Delay Timer
2 . S t r a i n e r / F l o w C o n t r o l
(.750GPM)
Page 11
REMEDY
Refer to Service - Dilution Solenoid
Valve for testing procedures. See
page 20
(A) Direction of fl ow arrow must be
pointing towards the check valve.
(B) Remove the fl ow control and
check for obstruction. Clear or
replace.
The brewer must be level or slightly
lower in front to syphon properly.
Inspect the tank assembly for ex-
cessive lime deposits. Delime as
required.
The water pressure to the brewer
must be at least 20 psi (138 kPa).
With the ON/OFF switch "ON" adjust
the brew timer to achieve the rec-
ommended 76 oz. of concentrate
then the dilution timer to achieve a
total of 396 oz. for each three-gal-
lon brew cycle.
(A) Direction of fl ow arrow must be
pointing upwards in the brewer.
(B) Remove the strainer/fl ow con-
trol and check for obstructions.
Clear or replace.
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