CPI COTI, Technical Manual, Page: 138 / 170

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10.3.3 Draining down the Espresso Boiler
Draining down the module allows the engineer to safely work on system components. It may
also be necessary to do this for transit purposes.
Note: A CoEx® Boiler Cool Down cycle MUST ALWAYS be carried out before draining
the espresso boiler.
1. Remove the lower cover from the module to expose the boiler blanking plug (1). Hold
the collar and remove the plug. You must also break into the water circuit above the
boiler by disconnecting any of the connections to allow the water to drain. A length of
silicone pipe attached to the outlet can be used as a drain tube.
2. Reverse the procedure before putting the module back into service.
10.4 CoEx® Brewer/Bean Grinder Maintenance
Espresso machines are fitted with the CoEx® brewer unit which produces both fresh coffee
and espresso based drinks from ground beans and freshbrew pre-ground coffee from the
same unit. Routine cleaning and maintenance instructions for this unit can be found in the
Operator’s Manual
10.4.1 CoEx® Brewer/Grinder Blades - 50,000 Vend Service
Crane Merchandising Systems recommends that the brewer unit and bean grinder are
serviced by an authorised engineer after every 50,000 vends.
To carry out the 50,000 vend service, proceed as follows:
1. Disconnect the machine from the mains electricity.
Open the front door of the machine and remove the
coffee dispense pipe from the brewer outlet.
Holding the unit as shown in the photograph, lift the
green lever (a) and carefully pull the brewer unit out of
the machine.
2. Carefully unclip the wiper arm from the brewer unit and
place to one side.
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