Troubleshooting guide

Bunn-O-Matic Corporation
17
Pump Assembly Bypass
The bypass holes are used for increased agitation in the water tank which has
an additional purpose of enhancing the performance and burst capacity of the
machine. Both pumps are identical in appearance but have two different service
replacement part numbers. Single hole is used in the JDF-2S and the two hole
bypass is used in the JDF-4S.
Water Tank Assembly
The water tank is used for the purpose of containing the non-
potable water in the development of the ice block and the
process of cooling the potable water in the water coil that will
be used for the purpose of product dispense. In addition, the
chilled non-potable water in the tank is used for the method
of cooling the upper cabinet to keep product at refrigerated
temperature.Thesizeofthetankandiceblockrelatetothe
meaning of burst capacity. Burst capacity refers to the number
of drinks/volume that can be produced without exceeding 41º
Fnisheddrinktemperaturewithinatimeframe.
Draining Water Tank
The unit will need to be unplugged or refrigeration switch
turned off for a period of 48 hours for the ice block to thaw.
After thaw, remove sight gauge tube from retaining clip and
lower the tube below tank level and the tank will begin drain-
ing water out of the sight gauge tube.
Water Delivery
When a user depresses a button or membrane on the door an input signal is sent to the CBA. In return the CBA will
send out the corresponding output to turn on the water inlet valve, dispense motor and dispense valve to begin dis-
penseorportiondispense.Thewatergoesthroughastrainerandisregulatedto2.0gpmbytheowrestrictorinthe
inletvalve.Thewaterowsthroughthecoldwatercoilthatissubmergedinthecoldwatertankandenterstheback
of each dispense valve.
Alldispensevalveshaveawaterow
rate adjustment to assist in the cali-
bration or ratio set-up of product. Pri-
marily the water is factory set and the
concentrate is adjusted for ratio set-up
by pump motor rpm. The concentrate
and water mixes in the High Intensity
dispense valve and is being delivered
outthequickstopnozzle.
The optional cold water dispense is
only available on the JDF-4S.
Water Return Manifold
Water Coil
Evaporator
OverowTube
Cabinet
Drain Line
Sight Gauge
Fill Tube
Water Inlet Valve
Water Coil
Optional/Cold
Water Valve
ColdWaterNozzle
Dispense Valve