GEAppliances CFE28TSH Technical Service Manual page 39

During a Cocoa dispense the Hot Water Outlet Valve
air into the Pod to stir up the contents so all will be
valve opens again and the air pump continues
for 5-10 seconds blowing air through the Hot
Water Outlet and pod to clear water and beverage
however the last 2 seconds the air pump increases
speed and pressure to ensure all of the content of
the pod are used.
The Hot Water tank is made of very strong glass
liner to protect the tank from the heater.
The tank consists of 2 chambers, a large lower
reservoir and a small upper reservior connected
by 2 quick connectors. The lower reservior holds
approximately 22 ounces of water, contains the
heater and stainless steel liner. The upper chamber
is an expansion area to prevent water drips at
the recess while the water is heating and provide
complete.
The heater is a 750 watt calrod for the standard
Cafe Models and a 1200 watt calrod for the Keurig
K-cup models the heater is protected by 2 internal
The water temperature in the tank is monitored by 2
thermistors located at the top left of the tank. Both
thermistors must have a valid reading (neither open
or shorted) for the Hot Water system to operate.
When the Hot Water system is activated the door
controls monitor both of the thermistors to ensure
the Hot Water system will be disabled and a fault
code is set. Both are wired to a 6 pin low voltage DC
connector.
that signals the controls that the tank is either
full when the contact is open or not full when the
same 6 pin low voltage DC connector as the tank
thermistors.
Water enters the Hot Water tank through the inlet
down the dip tube into the main lower chamber
As the water is heated it expands into the upper
chamber through the dip tube, venture, 2 quick
the excess water to enter and be collected. A vent
tube at the top of the upper chamber allows this
water to enter without resistance. On Keurig K-Cup
models the vent tube has a connector attached to
two solenoid valves that open and close the vent to
the atmosphere.
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