Most Likely to Burn You
Explain the steam tanks 2 probes and their lengths
Safety/Security Probe(longer): Ensures water level is above the heating elements to prevent a dry fire.
Working Level/Fill Probe(Shorter): Allows CPU to maintain optimal water level via fill circuit.
What is required of a Ditting KR1203 PM?
UNPLUG
1. Remove burr carrier and clean out burrs and burr chamber.
2. Check Transition Tube
3. Remove bottom plate and clean up grounds with a vacuum, pay special attention to terminal block
What is Voltage?
Electrical Pressure
You've rebuilt the mech module, replaced CR&CL, and expansion valve cart but one brew group is still pulling longer than the other.
Brew Valve Cart
Eric's favorite Coffee related pastime
Roasting
These are the two safety devices that active during what events?
PRV: Activates if tank goes over-pressure (2.8 Bar)
JUMO: Thermal Breaker that activates in an overheat scenario (155C/311F)
How do you calibrate a KR804/KR1203?
1. adjust finer until burrs start to chirp, back it off and set as Turkish.
Or
2. Adjust visually from a well know reference point.
Alternating Current: electrical current, where the flow of electrons switches back and forth at regular intervals or cycles
Direct Current: electric current that is uni-directional, so the flow of charge is always in the same direction
M2 called in for inconsistent shots, you arrive on site and remove cleaning key, while pulling shots no espresso comes from outlet and all hot water spills from the cleaning key.
Failed Check Valve
CR/CL?
Nolan has built a fully functional what?
Espresso Machine
This 240(208)VAC Circuit is always active if the 24VDC Fill Valve is Activated.
Booster Pump
But why?
This is the #1 killer of all power chords.
Cramming the back of the grinder up against the back splash.
Explain the electrical principle that turns electrical energy into heat energy
Electrical resistance is a property that opposes the flow of electric current in a conductor. It’s like a kind of “obstacle” that the current encounters when passing through a material. The byproduct is heat.
M2 called in for inconsistent shots, you arrive on site and measure shots with your scale. You measure 40G double shot from one brew chamber and 50G+ on other.
Failed Expansion Valve Cart
This is Wesley's favorite NY Roaster
JoeBean
This valve always activates when Emptying/Purge Valve is energized. Also why?
Bypass/Cold Water Mix
It is activated to mix cold water with the super heated pressurized water coming from steam tank.
The power switch turns on what component?
Relay
What is the difference between a Watt and an Amp?
A Watt is a unit of measure quantifying the relationship of electron flow over 1 second.
An Amp is the strength of the flow at any given moment
What devices is responsible for triggering the infamous "low water flow" error.
Flowmeter
Shawna brings experience from what Rochester based espresso machine retailer
Whole Latte Love
When both elements are fired how many amp are they pulling? 208V is the supply voltage and each element is rated for 2.7kW
5400/208=26
Total capacitance of both mill capacitors.
160 micro-Ferrads
Explain 208
208 VAC has three electrical legs, or phases, that are evenly spaced around a neutral.
Each phase provides power at a unique angle to the neutral (360degrees).
Combining any two legs of 120V to get a sum of 208VAC instead of 240VAC due to those two legs being 120 degrees out of phase with each other instead of 180 degrees.
M2 hydro module is heating but only very slowly
Small crack in the element
This is Jim's favorite home town cafe