Installation; Installation As Evaporator; Installation, Welding Aspects - Alfa Laval AlfaNova 76 Manual Del Usuario

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Installation as evaporator

For refrigeration applications – figure A below
shows the installation of an evaporator, for which
the connections may be either on the front or on
the rear. In evaporator applications and in applica-
tions in which a phase change of media occurs,
the heat exchanger should be installed vertically.
Figure B shows a condenser.
A
B
EN 8
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Installation

• Use an anti-freeze thermostat and flow monitor
• Avoid "pump-down", i.e. emptying the evapora-
• Use a flow switch and a low-pressure switch.

Installation, welding aspects

For installation of AlfaNova equipped with welding
connections, TIG or MIG welding method must be
used for installation of the heat exchanger to min-
imize heat impact of the heat exchanger.
to ensure a constant water flow before, during
and after the compressor has been running.
tor by running the compressor after shut-down
until a preset refrigerant pressure is reached.
The temperature could then drop below the
brine freezing point, which could damage the
evaporator.
Note!
To avoid damage due to freezing, the
medium used must include an anti-
freeze agent at operating conditions be-
low 5 °C/41 °F and/or when the evapo-
rating temperature is below 1 °C/34 °F.
Note!
Protect the heat exchanger by using a
heat-sink (welding paste or tape) around
the connection before welding opera-
tion.
Plate Heat Exchanger