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Cooling may be carried out either through an open
circuit with eventual discharge of the water, or us-
ing a closed circuit cooling system.
The water temperature must be between +10°C
and +30°C, with an inlet pressure between 3 and 5
bar. This allows a flow of about 200 l/h.
NOTE
The water electrical conductance must be
µ
s/cm. When the conductance is higher, in closed
water circuit, the use of up to 20% of Ethyl-Glycole
is suggested.
VENT ACCESSORIES
The vent valve and vent device allow to avoid un-
desired venting of the pump during temporary
power failure and enables an automatic vent op-
eration.
TV 551/701 Navigator Controller Compatible
Vent Valve mod. 969-9834
This vent valve waits before opening a minimum
time of about 5 sec. This time can be increased up
to about 220 min. by means of a setting of the
Navigator software (optional).
To install the vent valve, unscrew the threaded
plug (see figure below).
Then screw the vent valve into the pump and
tighten it using a 16 mm hexagonal spanner with a
torque of 2.5 Nm.
≤
500
Do not overtighten the valve as this may damage
the thread on the pump.
Then connect the cable from the valve to the suit-
able connector on the controller (see the preced-
ing paragraph "INTERCONNECTIONS").
Standard Rack Controller Compatible
Vent Valve mod. 969-9843
This vent valve has a fixed delay time of about 5
sec. This value can be used only with rack control-
ler.
To install the vent valve execute the same steps
as the vent valve model 969-9834 (see the above
paragraph).
69
TECHNICAL INFORMATION
!
CAUTION
87-900-934-01(G)
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