14
en
- Open the on-off valve located on the pump’s delivery side.
- Open a user or the test tap (chapter 6.1) partially, allowing the pressure to drop slowly.
- The pump starts.
- Turn the adjusting screw slowly to the left using a screwdriver.
Use the slotted blade screwdriver (2.5 mm) provided with the TKS system. The adjusting screw
has a limited travel, less than one turn, between the minimum value (0 bar) and the maximum
value (10 bar). Do not force it beyond the limits as you could damage the adjusting screw.
- Read the pressure value on the gauge and keep turning the adjusting screw until the gauge
pointer reaches the desired value.
- Make sure that the pressure has stabilized at the desired value.
- If necessary, make small adjustments by turning the adjusting screw to the right or left.
Make sure that the new value you have selected is within the head range specified in the TKS sy-
stem’s rating plate.
- The pump stops after approx. 60 seconds. The switch-off pressure may be slightly higher than the
desired value (chapter 6.4.1).
For further information refer to chapter 12.
6.3.4 Indicator Lights
On the adhesive plate attached to top of the radiator there are three LED’s with the following functions :
Steady green light
Power Indicates that the TKS system is powered
Steady yellow light
Run
Indicates that the pump is running
Flashing red light Alarm
Indicates an alarm has triggered
If an alarm is triggered, the red light will flash more or less rapidly depending on what has caused the sy-
stem to shut down. Except for lack of water on the suction side, in all other cases the system will automa-
tically start again after 20 seconds. If the cause of the malfunction persists, after three attempts to restart
the system will definitively shut down except in case of lack of water on the suction side.
For further information refer to chapters 8.1 and 12.
6.4 Product Description
Information for users
The TKS system consists of an electric pump operated by an automatic electronic control system (fre-
quency converter known also as speed variator) that enables the delivery of constant pressure by redu-
cing or increasing the flow rate based on the water demand.
6.4.1 Operation
The automatic electronic control system receives a signal from a pressure sensor and compares it with
the set value.
When the system is pressurized the pump is switched off. Water consumption by the users determines a
decrease in system pressure which causes a reduction in the value of the signal. In this case the control
system starts the pump, regulating its speed until the reference or operating pressure is re-established.
If the water consumption increases the control system increases the speed of the pump, while if the water
consumption diminishes the control system decreases the speed of the pump. When the maximum flow
rate of the pump is reached, the control system runs the pump at its maximum nominal speed.
If the pressure increases because of decreased water consumption, the value of the signal from the sen-
sor increases; in this case the control system reduces the speed of the pump.
If there is a swift decrease in water consumption (e.g. due to sudden closing of the faucets), the control
system runs the pump at minimum speed for approx. 60 seconds and then stops it. In this case the stop-
ping pressure coincides with the set value.
