Grundfos DMH 280 Installation And Operating Instructions Manual Download Page 8

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English (GB)

3.6 AR control unit

Functions of pumps with electronics:
• "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

• dosing controller function (only with sensor - optional)
• diaphragm leakage detection (only with sensor - optional)
• access-code-protected settings
• remote on/off
• hall sensor
• operating hours counter
• motor monitoring.
Operating modes:
• manual

Stroke frequency: manually adjustable between zero and
maximum

• contact signal control

Multiplier (1:n) and divisor (n:1)

• current signal control 0-20 mA/4-20 mA

Adjustment of stroke frequency proportional to the current
signal. Weighting of current input.

3.6.1 Inputs and outputs

AR control unit factory settings

• Inputs and outputs: NO (normally open)

• inputs and outputs: NC (normally closed).

3.7 Required energy

Power supply for AC voltage

Maximum permissible mains impedance

(0.084 + j 0.084) Ohm (testing according to DIN EN 61000-3-11).
These details apply to 50 Hz.

3.8 Ambient and operating conditions

• Permissible air humidity: max. relative humidity:

70 % at +40 °C, 90 % at +35 °C.

3.8.1 DMH with motor labelled for coolant temperature -20 °C

≤

amb

≤

40 °C

• Permissible ambient temperature: 0 °C (standard) to +40 °C

(for an installation height up to 1000 m above sea level)

• Pumps with minimum T

amb

-20 °C available on request

• Permissible storage temperature: -20 °C to +50 °C.

3.8.2 DMH with motor labelled for coolant temperature -20 °C

≤

amb

≤

55 °C and with dosing head material

stainless steel or PVDF

• Permissible ambient temperature: 0 °C (standard) to +55 °C

(for an installation height up to 1000 m above sea level)

• Pumps with minimum T

amb

-20 °C available on request

• Permissible storage temperature: -20 °C to +55 °C.

Pumps with AR control unit only

Maximum permissible mains impedance: 0.084 + j 0.084

(testing according to EN 61000-3-11).

Inputs

Contact signal

Maximum load: 12 V, 5 mA

Current 0-20 mA

Maximum load: 22

Remote on/off

Maximum load: 12 V, 5 mA

Two-stage tank-empty signal

Maximum load: 12 V, 5 mA

Dosing controller and diaphragm leakage sensor

Outputs

Current 0-20 mA

Maximum load: 350

Error signal

Maximum ohmic load:
50 V DC / 75 V AC, 0.5 A

Stroke signal

Contact time/stroke: 200 ms

Pre-empty signal

Maximum ohmic load:
50 V DC / 75 V AC, 0.5 A

Rated voltage

Permissible deviation from rated

value

230/400 V

± 10 %

240/415 V

± 10 %

115 V

± 10 %

Caution

The installation site must be under cover!
Do not install outdoors!

Note

Observe the nameplate of the motor.

Summary of Contents for DMH 280

Page 1: ...DMH 28X Dosing pump Installation and operating instructions GRUNDFOS INSTRUCTIONS Further languages http net grundfos com qr i 99558950 ...

Page 2: ...nnections 20 7 1 Electric servomotor optional 20 7 2 Electronic preselection counter optional 20 7 3 Electrically heated dosing head optional 20 7 4 Diaphragm controller optional 20 7 5 Connecting the power supply cable 20 8 Start up shutdown 21 8 1 Initial start up subsequent start up 21 8 2 Start up subsequent start up of DMH 280 21 8 3 Start up subsequent start up of DMH 281 288 23 8 4 Setting ...

Page 3: ...the operator user Hazardous hot or cold parts on the pump must be protected to prevent accidental contact Leakages of dangerous substances e g hot toxic must be disposed of in a way that is not harmful to the personnel or the environment Legal regulations must be observed Damage caused by electrical energy must be prevented for more details see for example the regulations of the VDE and the local ...

Page 4: ... the pump and motor nameplates An EC declaration of conformity is provided in accordance with the EC directive 2014 34 EU the so called ATEX directive This declaration of conformity replaces the declaration of conformity in this manual Warning To operate a pump which has been identified as an explosion proof pump for the dosing of inflammable media or for operation in potentially explosive operati...

Page 5: ...t valve 0 8 bar Hydraulic connections first outlet second inlet DMH 55 100D B SS V SS X E2A1A1XEMAG A G 5 8 for pipes with internal thread Rp 1 4 SS A1 G 5 4 for pipes with external thread Rp 3 4 SS B6 G 3 8 for pipes 4 6 mm cutting ring connection SS V G 5 8 for pipes with external thread 1 4 NPT SS A3 G 5 4 for pipes with external thread 3 4 NPT SS C2 G 5 8 for pipes 8 10 mm cutting ring connect...

Page 6: ...H 2 81 200 2 81 200 120 3 37 200 144 DMH 3 42 200 3 42 200 144 DMH 281 DMH 2 100 2 100 29 2 4 100 35 DMH 4 2 100 4 2 100 63 5 100 75 DMH 6 4 100 6 4 100 96 7 7 100 115 DMH 8 100 8 100 120 9 6 100 144 DMH 9 6 100 9 6 100 144 DMH 283 DMH 10 100 10 100 26 12 100 31 2 DMH 19 100 19 100 54 23 100 65 DMH 27 100 27 100 75 32 100 90 DMH 33 100 33 100 92 40 100 110 DMH 40 100 40 100 112 48 100 134 DMH 55 1...

Page 7: ...only met if the sockets are protected The data regarding the enclosure class applies to pumps with correctly inserted plugs or screwed on caps 3 5 2 Motor Version see motor and pump nameplates Pump model bar DMH 280 1 DMH 281 10 DMH 283 5 DMH 285 5 DMH 286 5 DMH 287 5 DMH 288 5 Pump model bar All 2 Note A positive pressure difference of at least 2 bar is required between the suction valve and the ...

Page 8: ...ty max relative humidity 70 at 40 C 90 at 35 C 3 8 1 DMH with motor labelled for coolant temperature 20 C Tamb 40 C Permissible ambient temperature 0 C standard to 40 C for an installation height up to 1000 m above sea level Pumps with minimum Tamb 20 C available on request Permissible storage temperature 20 C to 50 C 3 8 2 DMH with motor labelled for coolant temperature 20 C Tamb 55 C and with do...

Page 9: ...th or toxic If the pump has been used for such substances the pump must be cleaned before it is returned If proper cleaning is not possible all relevant information about the chemical must be provided If the above is not fulfilled Grundfos Water Treatment can refuse to accept the pump for service Possible costs of returning the pump are paid by the customer The safety declaration can be found at t...

Page 10: ...e and seals the stroke area from the drive area The hydraulic driven movement of the PTFE diaphragm Q displaces an equivalent volume of dosing medium from the dosing head 2 into the dosing line With the suction stroke the piston creates a low pressure which is established in the dosing head The ball valve 3b on the dosing side closes and the dosing medium flows through the suction valve 3a into th...

Page 11: ...English GB 11 Fig 4 DMH 283 Fig 5 DMH 285 286 287 TM03 6857 4506 TM03 6858 4506 1p F L M E 3b 3a 9p 3p 2p 5p 4p 2 Q V 6p L 1p F M E 3b 3a 9p 3p 2p 5p 2 Q V 6p 7p ...

Page 12: ...Return spring not with drive size 3 5p Sliding sleeve 6p Piston 7p Crank M Combined overpressure and degassing valve E Degassing valve 9p Diaphragm protection system AMS Q Dosing diaphragm 2 Dosing head V Dosing head deaeration screw 3a Suction valve 3b Discharge valve L Stroke length adjustment knob F Oil filling screw with dipstick ...

Page 13: ... 7 Contact pressure gauge Functional principle of diaphragm leakage detection The non return valve and the gap between the diaphragms are factory filled with a separating agent paraffin oil They are set in such a way during start up on the test stand that there is always a hydraulically separated equilibrium between the valve and diaphragm gap the pressure gauge indicates 0 when the pump is runnin...

Page 14: ... 1 4 9 234 240 129 25 191 290 194 5 11 5 DMH 287 490 553 170 24 5 274 G 5 8 9 208 240 129 25 176 290 194 5 24 5 DMH 288 425 492 156 20 155 5 G 5 8 9 208 185 126 10 173 225 180 22 TM07 3721 1019 Pump model A B C C2 D D1 D2 E F B1 J K M N S DMH 280 465 336 97 5 14 192 G 3 8 9 142 152 85 5 16 114 180 117 5 14 5 DMH 281 432 336 97 5 14 192 G 5 8 9 155 152 85 5 16 114 180 117 5 8 DMH 283 706 493 156 20...

Page 15: ...hemical manufacturer s safety instructions when handling chemicals Make sure that the pump is suitable for the actual dosing medium Caution The resistance of the parts that come into contact with the media depends on the media media temperature and operating pressure Ensure that parts in contact with the media are chemically resistant to the dosing medium under operating conditions Note Further in...

Page 16: ...s Note The flow must run in the opposite direction to gravity Caution Risk of damage to the system It is always recommended to use pulsation dampers for large high speed pumps Since the pulsation is influenced by many factors a system specific calculation is essential Request a calculation from our calculation program Pump model pump type Nominal width of suction line Maximum length of suction lin...

Page 17: ... suction line observe the following Keep the suction line as short as possible Prevent it from becoming tangled If necessary use swept bends instead of elbows Always route the suction line up towards the suction valve Avoid loops which may cause air bubbles Fig 10 Installation of suction line TM03 6296 4506 1i 2i 3i 4i 5i 6i 7i 9i 10i 8i max 1m Max 1 m Pos Components 1i Dosing tank 2i Electric agi...

Page 18: ...osing medium or a counter pressure below 2 bar Install a pressure loading valve 7i immediately before the outlet or the injection unit A positive pressure difference of at least 2 bar must be ensured between the counter pressure at the injection point and the pressure of the dosing medium at the pump suction valve If this cannot be ensured install a pressure loading valve 7i in the discharge line ...

Page 19: ...ilable in stainless steel Fig 19 Liquid heated dosing head Required characteristics of heating liquid The heating liquid must not chemically attack stainless steel Maximum permissible pressure pmax 3 bar Maximum permissible temperature tmax 100 C Warning To protect the dosing system against excessive pressure build up install a relief valve in the discharge line Only use the prescribed line types ...

Page 20: ...he pump housing must only be opened by personnel authorised by Grundfos Protect the cable connections and plugs against corrosion and humidity Only remove the protective caps from the sockets that are being used TM03 6460 4506 Pos Component 2e Dosing head electrically heated TM03 6461 4506 Pos Connections 2e1 Sensor 2e2 Heating 2e3 Power supply 2e 2e1 2e2 2e3 Warning Explosion proof pumps with dia...

Page 21: ...l clearly labelled mains switch with a minimum contact gap of 3 mm in all poles Warning The specified enclosure class can only be ensured if the power supply cable is connected with the same degree of protection Caution Observe the direction of rotation To protect the motor install a motor protecting switch or motor contactor and set the bimetal relay to the rated motor current for the available v...

Page 22: ...inutes The pump is now ready for operation Checking the degassing valve cartridge Check the setting of the degassing cartridge when the pump is switched off Fully tighten the adjusting screw 7e and then loosen by approx 1 4 turn Fig 25 Degassing valve After start up Torques TM03 6864 4506 Pos Components 1q Dosing head screws 2 Dosing head 3b Discharge valve F Oil filling screw with dipstick L Stro...

Page 23: ... injuries caused by the dosing medium Dosing medium leaks from the hose nipple I of the deaeration line If the pressure is high the medium may squirt out Turn the hose nipple I in the right direction or drain the dosing medium through a suitable hose When dosing dangerous media observe the corresponding safety precautions Wear protective clothing gloves and goggles when working on the dosing head ...

Page 24: ...p If the operating counter pressure deviates considerably from this value an adjustment of the zero point will ensure more precise values Counter pressure at the factory set zero point of the pump 8 5 2 Adjusting the zero point for system pressures of 100 bar and up Adjusting range approx 20 100 If the rated pressure of the pump is 100 bar or higher the maximum dosing flow is factory adjusted to a...

Page 25: ...ll lines 5 Uninstall the pump 8 7 2 Cleaning 1 Rinse all parts that have come into contact with the medium very carefully lines valves dosing head diaphragm 2 Remove any trace of chemicals from the pump housing 8 7 3 Storage Storage of the pump 1 After cleaning see section 8 7 2 Cleaning carefully dry all parts and reinstall the dosing head and valves or 2 change the valves and diaphragm See secti...

Page 26: ...ional When using the AR control unit observe the installation and operating instructions for the AR control unit in addition to the instructions in this manual Caution Before switching on the pump check that it is installed correctly See sections 6 Installation and 8 Start up shutdown TM03 6466 4506 Pos Components L Stroke length adjustment knob 1l Cover 2l Locking screw 3l Screw 4l Scale ring Cau...

Page 27: ... steel valves inner valve parts Changing diaphragms and gear oil At least every 12 months or after 8 000 operating hours change the dosing diaphragm and gear oil In dusty installation sites change the gear oil every 3 000 operating hours Cleaning the ball non return valve of the double diaphragm After a diaphragm breakage remove the ball non return valve immediately and clean it Replacing the groo...

Page 28: ...by new ones Refit the valve Fig 35 Stainless steel DN 4 valve spring loaded Fig 36 Stainless steel DN 8 valve spring loaded Fig 37 Stainless steel DN 20 valve Caution Check the oil level at least every two weeks and add oil if necessary Note Rod length of oil dipstick DMH 280 281 27 mm DMH 283 288 35 mm Immersion depth to marking approx 5 mm Warning Wear protective clothing gloves and goggles when...

Page 29: ...ith a stroke length setting of 40 Warning Wear protective clothing gloves and goggles when working on the dosing head connections or lines The dosing diaphragm should be replaced with each gear oil change Before removing the dosing head valves and lines empty any remaining medium in the dosing head into a drip tray by carefully unscrewing the suction valve Note Only use original Grundfos gear oil ...

Page 30: ...d after each time the diaphragm is changed tighten the dosing head screws After approximately 6 10 operating hours or two days cross tighten the dosing head screws using a torque wrench Pump model Torque Nm DMH 280 55 60 DMH 281 17 19 DMH 283 27 30 DMH 285 50 54 DMH 286 80 85 DMH 287 50 54 DMH 288 75 80 Warning Wear protective clothing gloves and goggles when working on the dosing head connections...

Page 31: ...cessary 2 Refit the oil filling screw F Torques Caution The paraffin oil between the diaphragms Q is connected via the clamping sleeves 6q to the contact pressure gauge S in order to fill and activate the diaphragm leakage detection The oil is able to pass between the diaphragms through the slits in the clamping sleeves and the slits in the intermediate disk The clamping sleeves 6q must therefore ...

Page 32: ...l non return valve T 5 Screw the contact pressure gauge S and connection piece U back on 6 For pumps and pressure gauges in explosion proof version screw the earth cable 4u back on Note Only clean the ball non return valve after a diaphragm breakage TM03 6453 4506 Pos Components S Contact pressure gauge 5s Union nut 6s Contact output T Ball non return valve U Connection piece 2u Deaeration screw 3...

Page 33: ...ump is designed for this Never block the overpressure valve Discharge valve is installed in the opposite direction of the flow Observe the arrow on the valve Install the discharge valve correctly The diaphragm protection system AMS responds The overpressure valve reacts independently of the dosing flow adjustment 10 to 100 Fault detection When the dosing head deaeration screw V is opened no jet me...

Page 34: ... low too much slip Replace the piston and piston slide valves Use other hydraulic oil with a higher viscosity mainly for frequency converter operation and higher counter pressures Fault detection When the pump stops fit the degassing valve E block start up the pump Check if the dosing flow increases Open the degassing valve E again when the pump stops The O rings of the degassing valve E are fault...

Page 35: ...0 60 70 80 90 100 h Q l h 100bar 10bar 200bar 100 bar 200 bar 10 bar 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 0 10 20 30 40 50 60 70 80 90 100 h Q l h 10bar 100bar 200bar 100 bar 200 bar 10 bar 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 10bar 200bar 100 bar 200 bar 10 bar TM03 6800 4506 TM03 6801 4506 TM03 6802 4506 TM03 6803 4506 0 1 2 3 4 5 0 10 20 30 40 50 60 70 80 9...

Page 36: ...0bar 200bar 100 bar 200 bar 10 bar TM03 7201 4506 TM03 7202 4506 TM03 6805 4506 TM03 6806 4506 0 1 2 3 0 10 20 30 40 50 60 70 80 90 100 h Q l h 80 bar 100 bar 60 bar 60 bar 100 bar 80 bar 0 1 2 3 0 10 20 30 40 50 60 70 80 90 100 h Q l h 80 bar 100 bar 60 bar 60 bar 100 bar 80 bar 0 1 2 3 4 5 6 0 10 20 30 40 50 60 70 80 90 100 h Q l h 80bar 100bar 60bar 60 bar 100 bar 80 bar 0 1 2 3 4 5 6 0 10 20 3...

Page 37: ...10 0 10 20 30 40 50 60 70 80 90 100 h Q l h 75bar 100bar 75 bar 100 bar 0 2 4 6 8 10 0 10 20 30 40 50 60 70 80 90 100 h Q l h 75bar 100bar 75 bar 100 bar 0 2 4 6 8 10 12 0 10 20 30 40 50 60 70 80 90 100 h Q l h 80bar 100bar 60bar 60 bar 100 bar 80 bar 0 2 4 6 8 10 12 0 10 20 30 40 50 60 70 80 90 100 h Q l h 80bar 100bar 60bar 60 bar 100 bar 80 bar TM03 6811 4506 0 2 4 6 8 10 12 14 0 10 20 30 40 50...

Page 38: ...100 h Q l h 75 bar 100 bar 50 bar 75 bar 100 bar 50 bar 0 5 10 15 20 25 30 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 35bar 50bar 50 bar 100 bar 35 bar 0 5 10 15 20 25 30 0 10 20 30 40 50 60 70 80 90 100 h Q l h 50bar 100bar 35bar 50 bar 100 bar 35 bar TM03 6814 4506 TM03 6815 4506 TM03 6816 4506 TM03 6817 4506 0 5 10 15 20 25 30 35 40 0 10 20 30 40 50 60 70 80 90 100 h Q l h 50bar 100bar 50 ...

Page 39: ... 0 10 20 30 40 50 60 70 80 90 100 h Q l h 75bar 100bar 50bar 75 bar 100 bar 50 bar 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 50bar 75bar 75 bar 100 bar 50 bar TM03 6821 4506 TM03 6822 4506 TM03 6823 4506 TM03 6824 4506 0 20 40 60 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 50bar 75bar 75 bar 100 bar 50 bar 0 20 40 60 0 10 20 30 40 50 60 70 80 90 100 h Q l h 75bar 1...

Page 40: ... 70 80 90 100 h Q l h 100bar 50bar 75bar 75 bar 100 bar 50 bar 0 20 40 60 80 100 0 10 20 30 40 50 60 70 80 90 100 h Q l h 75bar 100bar 50bar 75 bar 100 bar 50 bar 0 20 40 60 80 100 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 50bar 75bar 75 bar 100 bar 50 bar 0 20 40 60 80 100 0 10 20 30 40 50 60 70 80 90 100 h Q l h 75bar 100bar 50bar 75 bar 100 bar 50 bar TM03 6829 4506 0 20 40 60 80 100 120 ...

Page 41: ...0 bar 0 10 20 30 40 50 60 70 80 90 100 110 120 0 10 20 30 40 50 60 70 80 90 100 h Q l h 25 bar 50 bar 25 bar 50 bar 0 20 40 60 80 100 120 140 160 0 10 20 30 40 50 60 70 80 90 100 h Q l h 50 bar 25 bar 25 bar 50 bar 0 20 40 60 80 100 120 140 160 0 10 20 30 40 50 60 70 80 90 100 h Q l h 25 bar 50 bar 25 bar 50 bar TM03 6830 4506 TM03 6831 4506 TM03 6832 4506 0 50 100 150 200 250 0 10 20 30 40 50 60 ...

Page 42: ... 180 bar 200 bar 150 bar 0 5 10 15 20 25 30 35 0 10 20 30 40 50 60 70 80 90 100 h Q l h 200bar 150bar 180bar 180 bar 200 bar 150 bar 0 5 10 15 20 25 30 35 0 10 20 30 40 50 60 70 80 90 100 h Q l h 180bar 200bar 150bar 180 bar 200 bar 150 bar TM03 6839 4506 TM03 6840 4506 TM03 6841 4506 TM03 6842 4506 0 5 10 15 20 25 30 35 40 45 50 0 10 20 30 40 50 60 70 80 90 100 h Q l h 200bar 150bar 180bar 180 ba...

Page 43: ...Appendix 43 Fig 54 DMH 50 200 50 Hz Q0 160 bar TM03 6843 4506 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 80 90 100 h Q l h 200bar 100bar 160bar 160 bar 200 bar 100 bar ...

Page 44: ...70 80 90 100 h Q l h 100bar 200bar 100 bar 200 bar 0 2 4 6 8 10 12 14 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 200bar 100 bar 200 bar 0 2 4 6 8 10 12 14 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 200bar 100 bar 200 bar TM03 6848 4506 TM03 6849 4506 TM03 6850 4506 TM03 6851 4506 0 2 4 6 8 10 12 14 16 18 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 200bar 100 bar 200 bar 0 2 4 6 8 10 ...

Page 45: ...03 6852 4506 TM03 6853 4506 TM03 6854 4506 0 4 8 12 16 20 24 28 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 200bar 100 bar 200 bar 0 4 8 12 16 20 24 28 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 200bar 100 bar 200 bar 0 4 8 12 16 20 24 28 32 0 10 20 30 40 50 60 70 80 90 100 h Q l h 100bar 200bar 100 bar 200 bar ...

Page 46: ...________________ see pump nameplate Fault description Please make a circle around the damaged part In the case of an electrical or functional fault please mark the cabinet Please give a short description of the fault _______________________________________________________________________________ _______________________________________________________________________________ _______________________...

Page 47: ...so 4 I 20060 Truccazzano Milano Tel 39 02 95838112 Telefax 39 02 95309290 95838461 Japan GRUNDFOS Pumps K K 1 2 3 Shin Miyakoda Kita ku Hamamatsu 431 2103 Japan Phone 81 53 428 4760 Telefax 81 53 428 5005 Korea GRUNDFOS Pumps Korea Ltd 6th Floor Aju Building 679 5 Yeoksam dong Kangnam ku 135 916 Seoul Korea Phone 82 2 5317 600 Telefax 82 2 5633 725 Latvia SIA GRUNDFOS Pumps Latvia Deglava biznesa ...

Page 48: ...isplayed in this material including but not limited to Grundfos the Grundfos logo and be think innovate are registered trademarks owned by The Grundfos Group All rights reserved 2019 Grundfos Holding A S all rights reserved www grundfos com ...

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