Closed
System
Phoenix
from
to
!
Hoses
26
HAAKE Phoenix II P1
Version 3.07
9.4 Pressure pump
9.4.1 Temperature controlling an object in the
internal bath
Close pump pressure and return port with the closing
pieces and coupling nuts (see chap. 9.1) or for a better
temperature accuracy connect the two nozzles with a
short hose.
9.4.2 Connection of external closed systems
E.g. instruments with a pressure-tight temperature
jacket or coil or a heat exchanger (external system).
Hose connection:
From the pressure port to the exter-
nal system and then back to the return port.
If it cannot be avoided that the external object is si-
tuated higher than the circulator, the heat transfer will
only not flow back on the condition that the system is
completely tight and leak-free. To be on the safe side
it may be considered necessary to fit stop cocks to the
inlet and outlet hoses.
9.4.3 Connection of external open systems
Hose connection:
From the pressure port to the exter-
nal bath and then back to the suction port.
With a hose support (optional accessory) which is
employed for baths with a wall thickness up to 26 mm,
both the pressure and suction hose are securely held.
With a clamp in the pressure hose the amount of the cir-
culating liquid is balanced with that of the amount float-
ing back. It is recommended to use a hose with 8 mm
interior-
∅
as pressure hose and one with 12 mm inter-
ior-
∅
as suction hose.
The end of the pressure hose in the bath vessel should
be placed in a position where an optimum circulation
within the bath is achieved.
The liquid level of the external bath can be adjusted
with the end of the suction hose.
The external system and the temperature unit have to
be arranged so that they have the same liquid level in
order to prevent draining by siphoning action. In case
the application requires that both systems have to be
situated at different levels, the two hose lines have to
be closed prior to turning off the temperature unit.
When a safety element causes a shut off, the si-
phoning of one of the vessels cannot be prevented.
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