de Jong Duke COEX 9CND SERIES, Technical Manual

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Electrical connections/wire colors:
Pump 1:
Number Wire color
function
1 Grey-Blue Common (+24V)
2 Yellow-Brown Output (0)
Pump 2:
Number Wire color
function
1 Black-Pink Common (+24V)
2 Orange-White Output (0)
Machines with one or two pumps:
- The Fresh brew version without a bean hopper (Zia 6000) has just 1 pump and
is brewing coffee on a low 1-4 bar pressure.
- The B2C espresso machine has 2 pumps, parallel connected and can brew
espresso on 8-10 Bar or coffee on a low pressure 1-4 bar.
The variation in pressure generates an excellent coffee or espresso flavor.
Part number pump: 4EMT027
2 pumps system (Zia 8000 series) 1 pump system (Zia 6000 series)