Components; Suction Lines; Dosing Pumps - GRUNDFOS ALLDOS Oxiperm C 164 Series Operation And Service Manual

5.2 Components

5.2.1 Suction Lines

5.2.2 Dosing Pumps

16
Item 10 Dosing pump for H
Item 10.1 Suction line for H
Item 10.2 Dosing controller for H
Item 11 Gauging system for H
Item 12 Water tank for preliminary dilution, with float valve and
overflow contact
Item 13 Gauging system for HCl (164-1300/2500)
Item 14 Gauging system for NaClO
Item 15 Purging unit for reactor
Standard version: ball valve
Option: solenoid valve and drain unit
The suction lines must be matched to the tank size and the system performance
(diameter of suction line).
They have a two-stage level monitoring feature.
If the level of the components (HCl / NaClO
advanced empty alarm), the alarm "HCl – MIN" or "NaClO
controller as an advanced warning.
This is indicated by flashing of the LED on the controller flowchart (see Section
"Control and display elements on the controller", item 2 and item 5).
The system remains in operation following an advanced empty alarm. A relay
"Advanced empty alarm NaClO
The system is switched off when the second stage is reached (MIN-MIN contact/
main empty alarm), and the alarm "HCl – empty alarm" or "NaClO
is output on the controller.
The "Alarm" relay is then activated (see Section "Control and display elements on
the controller", item 22). The alarm LED lights up red permanently. If a buzzer is
connected to the floating output relay, an audible signal is output.
The dosing pumps are mounted at the bottom end of the system frame. The suction
ends of the suction lines lead to the pumps. The stroke length is adjusted using a
rotary knob on the dosing pumps. The pumps are not frequency-controlled, they
operate according to the pulse/pause procedure.
The stroke length is preset, but may have to be corrected following gauging of the
pumps since the local pressure conditions depend on the application.
Gauging of the dosing pumps is carried out on the system using the respective
gauging system.
Refer to the Table "Performance and consumption data", Section 3.1.1 for the
dosing rate to be set for the pumps.
The dosing rates of the pumps should be set approximately the same (+/- 10-15%)
to guarantee uniform consumption of the chemicals.
The stroke length must not be adjusted any further following gauging.
Oxiperm 164 150-2500 g en
O
2
O
2
O flow monitoring
2
O dosing pump
2
(164-1300/2500)
2
) drops to the first stage (MIN contact/
2
2
/ HCl" is activated.
2
– MIN" is output on the
– empty alarm"
2
15.710010-V5.0