Xylem TEKNOSPEED - Manual (Page 24)

6.2.11 Pressure Transmitter
The TKS system comes with pressure transmitter connected to the TEKNOSPEED converter’s terminal
board. The transmitter is equipped with a 2-meter shielded cable. If you need to wind up the cable, do
not coil it but fold it .
For further information refer to chapter 12.
6.2.12 Regulation Dip-switches
The TEKNOSPEED converter is equipped with a series of microswitches (dip-switches) that determine its
operating cycle.
Do not modify the factory setting; you could damage the converter or the system on which it is in-
stalled.
For further information refer to chapter 12.
6.3 Initial Start-up
6.3.1 Priming
Read the operating instructions for the electric pump.
Fill the pump and suction pipes with water before starting the system. Dry running can damage
the pump.
Start the system with the on-off valve on the delivery side closed. Then open the valve gradually. When
the air in the pipe has been bled off the pump will run smoothly and silently.
6.3.2 Checking the Direction of Rotation of the Motor
There is no need to check the direction of rotation of the motor since it is pre-set at the factory.
6.3.3 Operating Pressure Calibration
A pressure gauge must necessarily be installed on the delivery side as it may be necessary to
modify the factory setting according to the actual installation conditions and system require-
ments.
The TKS system comes with a factory setting that enables it to be used.
To modify the pressure based on the actual system requirements proceed as follows:
• Increasing the pressure value
- Make sure that the system is pressurized, no user is open and the pump is off. If there are any open
users you can close the on-off valve located on the pump’s delivery side.
- Unscrew the plug that protects the adjusting screw.
- Turn the adjusting screw slowly to the right 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 .
- The pump starts.
- 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 slight adjustments by turning the adjusting screw to the right or left. If you need to
lower the pressure setting, we recommend that you open a user partially (see next section “Lowering
the pressure value”).
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)
• Lowering the pressure value
- Make sure that the system is pressurized, no user is open and the pump is off.
- Unscrew the plug that protects the adjusting screw.
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