Tetra Pak Hoyer Frigus 400, Manual

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Tetra Pak
Hoyer
4-4 F40 03 DB 00
Fig. 4.4
4.2.1 Cooling water connection
Connect up the supply of condenser cooling
water, taking care to get the direction of water
flow correct: water must flow in through the
connection at the bottom (2) and out through the
connection at the top (1) . It is recommended that
two on/off taps (3) (4) be installed close to the
machine, as well as a small drain tap (5) close to the
bottom connection; it is also a good idea to connect
up these two taps with the machine through two pipe
unions (three-piece connectors) to make it easy to
separate the freezer from the installation.
The machine is fitted with a pressure valve which
controls the flow of water in inverse proportion
to its temperature to obtain constant cooling
(constant condensation pressure on the coolant
side); this makes it possible to use water supplies with widely varying temperatures for cooling the
condenser. The water flow varies as a result, from
about 600 litres/hour at 5ºC to 3600 litres/hour
at 28ºC (average values for machine in operation
at maximum production rate).
Pipe diameter depends on pipe length and the
pumps available, and must never be less than
the diameter of the connections, which is 1” gas.
It is essential to wash out the pipes BEFORE
connecting them to the machine by flushing them
with water to eliminate any particles or dirt. If
the water that flows out of the pipes continues to
be dirty, it will be necessary to install a filter with
a filtering capacity and size appropriate to the
type and amount of dirt conveyed at the intake (1)
(the bottom connection).
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