La Marzocco Linea PB Manual - page 11

EN

11

thus preventing them from working properly. 

Connect  the  water  supply  connection  of 

the  espresso  machine  to  the  water  pump 

outlet  using  one  of  the  supplied  stainless 

steel braided hoses. Then connect the water 

pump inlet to the water filter/softener outlet 

(if present).

Note: The water pump is a differential pressure 

volumetric pump and has been designed to 

be  used  exclusively  with  cold  water.  Make 

sure that water is always present while the 

pump  is  operating,  otherwise  air  can  be 

introduced into the brew boiler causing an 

undesireable  condition  and  the  pump  can 

be damaged.

5) Electrical connections

a) Power supply cord

•  This  is  the  main  power  supply  cable 

that  provides  power  to  the  entire  espresso 

machine.  There are different types of cable 

based  upon  the  electrical  requirements  of 

the espresso machine purchased:

•  200/220VAC  1  Phase  3-core  cable  with 

4/6/10mm2 cross section or AWG 12/10/8 

for 2,3 4 group versions,  secured to espresso 

machine via a strain relief connector

• 220VAC 3 Phase 4-core cable with 4 mm2 

cross section for  2 , 3 and 4 group versions, 

secured  to  espresso  machine  via  a  strain 

relief connector

•  380  VAC  3  Phase    5-core  cable  with 

2.5mm2 cross section for 2, 3 and 4 group 

versions, secured to espresso machine via a 

strain relief connector.

b) Water pump motor power cord

This is the power supply for the water pump 

motor.  The internal electronics will switch 

the pump motor on when needed.

• 3-core cable with 1.5 mm2 cross section 

or 3-core AWG 16 (for UL version) secured 

to  espresso  machine  via  a  strain  relief 

connector.

c) Quick connection between the water pump and 

the espresso coffee machine

The  electrical  connection  must  be  made 

through  the  use  of  the  connectors,  as 

shown in the following figures:

- View of the connectors;

- Cable connection;

- Cable tightening;

CAUTION

BEFORE MAKING ANY ELECTRICAL CONNECTIONS MAKE 

SURE THAT THE TWO STRAIN RELIEF CONNECTORS 

ARE FIRMLY SECURED TO THE BODY OF THE MACHINE 

IN ORDER TO PREVENT INADVERTENT STRESS ON THE 

POWER CABLES.

WARNING

THE MOTOR PUMP MUST BE SITUATED CLOSE TO THE 

MACHINE IN AN ACCESSIBLE PLACE FOR MAINTENANCE 

BUT NOT FOR ACCIDENTAL INTERFERENCE AND WHERE

THERE IS AN OPTIMAL AIR CIRCULATION.

THE MOTOR PUMP MUST BE SITUATED

CLOSE TO THE MACHINE IN AN ACCESSIBLE

PLACE FOR MAINTENACE BUT NOT FOR

ACCIDENTAL INTERFERENCE AND WHERE

THERE IS AN OPTIMAL AIR CIRCULATION

WARNING

HAZARDOUS VOLTAGE DISCONNECT FROM

POWER SUPPLY BEFORE SERVICING.