Wega Espresso Coffee Machine Service Manual download pdf (Page 11)

espresso coffee machine - instructions for technician

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3.2 HYDRAULIC CONNECTION FOR EPU - EVD - EVDT MACHINES

1) Remove any rubber plugs which may be inserted in the tap fixtures of the softener.

2) Connect the water mains

(2) to the softener inlet (7) using the provided hose.

3) rinse resins

from the softener and check that the water, which initially comes out yellowish, comes out clean

4) connect the softener outlet (8) to the external motor pump inlet (9);

5) connect the outlet of the motor pump

(10) to the inlet of the machine (11);

WARNING

If hydraulic connection is not to the water mains but to an external tank, it is advisable to place a non-return valve between the

machine and the tank. The connection pipe between the machine and the external tank must not be greater than 150 cm.

NOTE

In all machines equipped with automatic water ﬁ lling, there is an automatic time control device which allows the boiler to

be ﬁ lled with water within a maximum period of time. This function keeps water from coming out of the valve of the boiler

(ﬂ ooding) and keeps the motor pump from overheating.

If the maximum time is not enough for the boiler to ﬁ ll up completely (machines installed with 3 or 4 groups), turn the ma-

chine off and then back on, and repeat the operations shown above.

When the machine is started for the ﬁ rst time, it is advisable to ﬁ ll the boiler manually using the knob (14)

NOTE

All ﬁ lling connections are 3/8 male gas type. The drain tub is connected

with a tube with an internal diameter of 16mm.

6) connect the drain tub of the machine (12) to the sewer discharge (13)

using the special tube provided. Take care to avoid overly tight bends or

kinks, and make sure that there is sufficient inclination for water to flow

out of the drain.

3.3 HYDRAULIC CONNECTION OF ALE MACHINES

1) Remove any rubber plugs which may be inserted in the tap fixtures of

the softener.

2) connect the water mains

(2) to the inlet of the machine (11);

connect the drain tub of the machine (12) to the sewer discharge (13)

using the special tube provided. Take care to avoid overly tight bends or

kinks, and make sure that there is sufficient inclination for water to flow out

of the drain.

Warnings

The water mains must provide cold water for human consumption (potable water) at a pressure between 1 and 5 bar inclusive If the pressure

is greater than 5 bar, connect a pressure reducer upstream from the pump.

2) insert a tap (2) on the water mains supply so that it will be possible to cut off water flow to the machine;

in order to prevent damage to the outer covering, to the valves or to the taps, install the softener where it will be protected from accidental blows;

to prevent the water from freezing, install the softener in rooms with an ambient temperature of more than 0°C;

if there is no softener, connect the water mains (2) directly to the inlet of the external motor pump(9);

if there is an internal motor pump, connect the outlet of the softener (8) (if there is one) or the water mains (2) directly to the machine inlet (11);

7) when connecting the tub of the machine to the sewer drain, avoid overly tight curves or kinks, and make sure that there is sufficient

inclination for water to flow out of the drain.

the drain must be connected to an inspectionable siphon that can be periodically cleaned in order to avoid the backflow of unpleasant odours;

9) to avoid oxidization and damage to the machine over time, do not use iron connections for the hydraulic connections, even if they are

galvanized.

LEVER MACHINE

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Wega Espresso Coffee Machine Service Manual Page 11

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