3.9 Safety of the system in the event of a failure in the hazards: dosing system • failure of important functions of the pump/system DMX 226 dosing pumps are designed according to the latest • failure of specified methods for maintenance technologies and are carefully manufactured and tested. However, •...
4.3 Pump performance 4.3.1 Accuracy • Dosing flow fluctuation: ± 1.5 % within the control range 1:10. • Linearity deviation: ± 4 % of the full-scale value. Adjustment from max. to min. stroke length, within the control range 1:5. Applies to: •...
4.4 Suction heights 4.4.1 Media with a viscosity similar to water Applies to: • counterpressure of 1.5 to 3 bar • non-degassing and non-abrasive media • temperature of 20 °C • stroke length 100 % • standard pump version. 50 Hz 60 Hz 100 Hz Max.
In the event of questions regarding the material resistance DMX 160-5 and suitability of the pump for specific dosing media, Caution DMX 190-10 please contact Grundfos. DMX 199-8 The dosing medium must have the following basic characteristics: DMX 224-5 •...
"Continuous operation" button for function test and dosing head deaeration • memory function (stores a maximum of 65,000 pulses) • two-stage tank-empty signal (e.g. via Grundfos tank empty sensor) • stroke signal/pre-empty signal (adjustable), e.g. as a feedback to the control room •...
If proper cleaning is not possible, all relevant information about the chemical must be provided. If the above is not fulfilled, Grundfos can refuse to accept the pump for service. Possible costs of returning the pump are paid by the customer.
6.2 Installation tips • For easy deaeration of the dosing head, install a ball valve (11i) with bypass line (back to the dosing tank) immediately after the discharge valve. • In the case of long discharge lines, install a non-return valve (12i) in the discharge line.
6.4 Hose / pipe lines p ≥ 1bar 6.4.1 General Warning To protect the dosing pump against excessive pressure build-up, install a relief valve in the discharge line. Only use the prescribed line types! All lines must be free from strain! Avoid loops and buckles in the hoses! Keep the suction line as short as possible to avoid cavita- tion!
6.5 Connecting the suction and discharge lines • Connect the discharge line to the dosing controller. Warning All lines must be free from strain! flow Only use the prescribed line types! 2 mm • Connect the suction line to the suction valve. - Install the suction line in the tank so that the foot valve remains 5 to 10 mm above the bottom of the tank or the possible level of sedimentation.
Warning bubbles. The pump housing must only be opened by personnel au- 7. Close the deaeration valve (17), if installed. thorised by Grundfos! The pump is now ready for operation. Warning Protect the cable connections and plugs against corrosion and humidity.
It is necessary to check regularly (daily) if liquid is leaking out of the intermediate flange. For maximum safety, we recommend the pump version with diaphragm leakage detection. 9.1 Description of the pump DMX 226 Pos. Components...
9.2 Switching on/off 9.4 Stroke-length adjustment Before switching on the pump, check that it is installed Warning correctly. Refer to sections Installation and Commission- Caution Wear protective clothing (gloves and goggles) when work- ing. ing on the dosing head, connections or lines! •...
Warning Observe the manufacturer’s instructions! The connections must be carried out according to these instructions. Settings of frequency converter when used with Grundfos dosing pumps Pay special attention to the following parameters of the frequency converter: •...
10. Operation with other electronics 10.2.4 Electrical connection of the electronics First refer to the general section Operation. This section Warning Caution only describes the additional functions. Electrical connections must only be carried out by quali- fied personnel! Related information Disconnect the power supply before connecting the power 9. Operation supply cable and the relay contacts!
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10.2.5 Relay outputs The relay output connection depends on the application and the connected actuators. Note • Interference suppression is required for inductive loads (also relays and contactors). • If this is not possible, protect the relay contacts using a suppressor circuit as described below. With AC voltage Current up to Capacitor C...
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• No maintenance is possible by the user. 10.2.8 Using the contacts • If the electronics does not operate correctly, call Grundfos • Terminals 6 and 7 (potential-loaded) service. - for instance for switching off the pump in case of a diaphragm leakage.
11. Integral relief valve 11.4 Setting of opening pressure 11.4.1 General 11.1 Function The opening pressure can only be set if a pressure gauge is If the pump is the only pump in the system, the integral relief valve installed in the system between the pump and the next isolating (optional) protects the complete discharge side of the discharge line valve or pressure-loading valve.
11.5 Venting The relief valve can also be opened manually, thus serving as a venting valve at the same time. If manual venting is required (e.g. nduring start-up or when the tank has been replaced), proceed as follows: • Turn the knob so that the smaller cut-out rests on the nub of the dosing head (the rotary knob is then further away from the dosing head).
Observe the flow direction (indicated by an arrow on the qualified personnel. valve)! For this purpose, send the pump to Grundfos or an au- thorised service workshop. To ensure trouble-free operation, it is recommended to have the gear grease changed after five years or after 20,000 operating hours.
12.4 Maintenance of the relief valve 12.5 Replacing the diaphragm 12.4.1 Cleaning and maintenance intervals Adjust the stroke length only while the pump is running! Caution Clean the relief valve, and replace the diaphragm, if necessary. During transport, the deaeration opening must be closed Caution •...
Leaking suction line. Replace or seal the suction line. and peripheral equipment. and correct installation. Cross-section of the suction Check with Grundfos 13.4 Dosing flow of the pump is inaccurate. line too small or suction line too specification. long. Cause Remedy Clogged suction line.
They apply to: 1. Use the public or private waste collection service. • performance of single pump (the flow rate is doubled for the 2. If this is not possible, contact the nearest Grundfos company or double pump), service workshop. •...
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Appendix B B.1. Safety declaration • Please copy, fill in and sign this sheet and attach it to the product returned for service. • Fill in this document using English or German language. Fault description • Please make a circle around the damaged part. •...
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Tel.: +387 33 592 480 Centre Turkey Fax: +387 33 590 465 29-33 Wing Hong Street & 68 King Lam GRUNDFOS Pumper A/S GRUNDFOS POMPA San. ve Tic. Ltd. Sti. www.ba.grundfos.com Street, Cheung Sha Wan Strømsveien 344 Gebze Organize Sanayi Bölgesi E-mail: grundfos@bih.net.ba...
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