Inova NH 20/40 Betriebsanleitung Seite 33

8.2 Filling and venting
Fill and vent the system correctly. The pump rotor chamber
normally vents automatically after a short time in operation.
However, if direct venting of the rotor chamber is required, the
venting function can be started.
By turning the knob to the symbol for venting in the middle
position, the venting function is activated after 5 seconds. The
venting function lasts 10 minutes and is indicated in the LED
display by horizontal bars moving upwards. Noises may be
heard during the venting function. The process can be stopped
if desired by turning the knob.
After 10 minutes, the pump stops and goes into a wait mode
which is indicated by the middle bar of the LED display flashing.
Afterwards, the control mode and the delivery head must be
set in order to the put the pump into operation.
NOTE: The venting function removes accumulated air from the
rotor chamber of the pump. The venting function does not vent
the heating system.
8.3 Setting the control mode (Fig. 2a, 2b) and the delivery head
To select the control mode symbol and set the desired delivery
head, turn the knob.
Setting the control mode
Variable differential pressure (Δp-v): Fig. 2a
The pump for the control mode Δp-v is set on the left of the
middle position.
Constant differential pressure (Δp-c): Fig. 2b
The pump for the control mode Δp-c is set on the right of the
middle position.
NOTE: If a Speck N type pump is replaced by an INOVA NH, the
knob can be moved to the first (I), second (II) or third (III) incre-
ment on the scale for Δp-c. This can be used as a reference
Installation and operating instructions INOVA NH
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