Tank Module - Bunn Fast Cup Series Service & Repair Manual

REAR PANEL
Inlet, Pre-Heat & Finish Tank Assembly
(Module)
Purpose: A total of three tanks make up the tank
module. The three tanks are referenced as Inlet,
Pre-Heat and Finished boiler tank. Each tank has a
heating element, qty-2, limit thermostats and a tem-
perature sensor.
All three tanks are identical in electrical components.
The only difference is the orientation or position of
the Inlet Tank from the other two tanks (Pre-Heat &
Finish). All three tanks are plumbed in series, de-
signed in managing the heating cycle/current and
capable of delivering a minimum of qty-6, 20 oz.
drinks back to back before "Please Wait Heating"
message appears.
Heating Priority: First, Finish Boiler Tank, Second,
Pre-Heat Boiler Tank and Third, Inlet Boiler Tank
Note: A maximum of any two tanks can heat at the
same time.
TEST INSTRUCTION
Note: First, cool the tank module so you don't ac-
cidentally create a tank over temperature error which
could result in a tripped limit thermostat.
Tank Module Cooling Instruction
Step 1: Enter Service Technician Mode and select
Service icon.
Step 2: Select and enter the Heaters tab.
Step 3: Disable Finish, Pre-Heat and Inlet Heater
Control. This will temporarily stop the
heating control from turning ON because of
low tank temperature.
Step 4: Exit Heaters tab and enter Water System
tab.
Step 5: Touch and hold Hot Water Bypass Valve
to start cooling down the tank module.
The valve test time runs a maximum of 10
seconds.
Step 6: Next, go back to the Heaters tab. Read all
three tank temperature's and ensure they
are cooled down below 150° F. from 200°F.
SERVICE

Tank Module

2
4
95
6
ON
3
10.8 amps
5
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