3033-005B Section 5: Plumbing
Concordia Xpress Technical Support Manual 5-7
2900-300B
Flowmeter
The flowmeter is used to measure water flowing throughout the system.
The flowmeter contains a Hall-Effect Sensor. As the internal impeller
spins, a fixed sensor located on the top of the flowmeter detects the
passing of the magnets which interrupts (pulses) the DC signal flowing to
the CPU. The CPU correlates .5mL of water per pulse to determine the
total volume of water passing through the flowmeter. Water passing
through the flowmeter is displayed in milliliters.
Heating Elements
The water tank contains three 850 watt - 48
(ohm) heating elements.
Only two heating elements are used on single-phase and high leg-
configured machines. Use the third heating element as a spare.
One pair of solid state relays control the AC voltage to each of the
heating elements. The heating elements are wired in parallel, so when
reading the resistance you will see approximately 24
. Remember to
isolate the element from the system prior to performing an ohms check.
Brew Valve
Operating Voltage: 24Vdc
The brew valve controls the water flow to the brew group, which is used
to extract espresso. The brew valve is the top rear solenoid on the dual
manifold valve assembly located on top of the hot water tank.
Hot Water Valve
Operating Voltage: 24Vdc
The hot water valve is used for dispensing hot water into the cup. The
hot water valve is the top front solenoid on the dual manifold valve
assembly located on top of the hot water tank.
PULSED 5 VDC SIGNAL OUPUT TO CPU
TRANSLATES INTO 0.5ML / PULSE
WATER
INPUT
WATER
OUTPUT
5 VDC SIGNAL INPUT
TO FLOWMETER
Viewing amount of water flowing through the flowmeter
1. Navigate to TEST ROUTINES > BREW WATER
VALVE.
2. Activate the valve. The display will read “[X] mL” and
increase as the valve is opened and water flows
through the flowmeter.
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