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Maintenance/repair

WILO USA 2021-01

9.5.2

Dismantling the bearing bracket

4.5 4.3 4.2 4.4

4.4 4.2

4.3 3.3

8.1 8.3 8.2

Fig. 22:

Bearing bracket

4.1A

4.1B

3.1

Fig. 23:

Shaft

1. Remove the key (3.3).

2. Pull off the thrower (4.5) and V-gaskets (4.3).

3. Remove the bearing cover (4.2) and retaining ring (4.4).

4. Loosen the hexagon head screw (8.2), remove the lock washer (8.3) and remove the

pump support foot (8.1).

5. Completely remove the shaft (3.1) from the bearing bracket (5).

6. Remove the ball bearings (4.1A and 4.1B) from the shaft (3.1).

9.6

Installation

Installation must be carried out according to the detailed drawings in the “Dismantling”
chapter and the general drawings in the “Spare parts” chapter.

Clean the single components and check them for wear before installing them. Damaged
or worn parts must be replaced with original spare parts.

Coat location points with graphite or similar materials before installation.

Check the O-rings for damage and replace if necessary.

Flat gaskets must be constantly replaced.

DANGER

Risk of fatal injury due to electrical current!

Proceeding incorrectly when carrying out electrical work can lead to death by electric
shock!

• Any work on electrical devices may only be carried out by a qualified electrician.

• Before all work on the unit, deactivate the power supply and secure it against being

accidentally switched on again.

• Any damage to the pump connection cable should only ever be repaired by a quali-

fied electrician.

• Observe the installation and operating instructions for the pump, motor and other

accessories!

• Reinstall any uninstalled safety devices, such as terminal box covers, once the work

is complete!

Содержание NL-HE Series

Страница 1: ...Pioneering for You Wilo NL HE 3327453 Ed 01 2021 01 en Installation and operating instructions ...

Страница 2: ......

Страница 3: ...y 11 4 5 Scope of delivery 11 4 6 Accessories 12 4 7 Anticipated noise levels 12 4 8 Permissible forces and torques on the pump flanges 13 5 Transportation and storage 13 5 1 Delivery 13 5 2 Transport 14 5 3 Storage 15 6 Installation and electrical connection 16 6 1 Personnel qualifications 16 6 2 Operator responsibilities 16 6 3 Preparing the installation 16 6 4 Setting up the pump by itself vari...

Страница 4: ...5 Dismantling 32 9 6 Installation 34 10 Troubleshooting possible causes and remedies 37 10 1 Troubleshooting 38 10 2 Causes and remedies 38 11 Spare parts 39 11 1 Spare parts list 40 12 Disposal 41 12 1 Oils and lubricants 41 12 2 Water glycol mixture 41 12 3 Protective clothing 41 12 4 Information on the collection of used electrical and electronic products 41 ...

Страница 5: ...Safety This chapter contains basic information for the individual phases of the life cycle Failure to observe this information carries the following risks ƒ Injury to persons from electrical mechanical and bacteriological factors as well as elec tromagnetic fields ƒ Environmental damage from discharge of hazardous substances ƒ Property damage ƒ Failure of important functions of the product Failure...

Страница 6: ...ger of crushing Warning risk of cutting injuries Warning hot surfaces Warning high pressure Warning suspended loads Personal protective equipment wear a safety helmet Personal protective equipment wear foot protection Personal protective equipment wear hand protection Personal protective equipment wear mouth protection Personal protective equipment wear safety goggles Useful information ...

Страница 7: ... cables filters etc ƒ Replace defective connection cables Contact customer service 2 4 Transport ƒ Wear protective equipment Safety gloves for protection against cuts Safety shoes Sealed safety goggles Safety helmet when using lifting equipment ƒ Only use legally specified and approved lifting gear ƒ Select lifting gear based on the available conditions weather attachment point load etc ƒ Always a...

Страница 8: ...n also remain hot after switching off the unit These surfaces may only be touched with extreme caution Wear protective gloves if it is essential to touch hot surfaces Make sure that the drained water is not too hot for more intensive contact with skin Introduce appropriate equipment to protect components that may become hot against ac cidental contact Hazard due to articles of clothing or other ob...

Страница 9: ...ormance data e g size construction hydraulic rated power speed needed to select a motor 2 9 Operator responsibilities The operator must ƒ Provide the installation and operating instructions in a language which the personnel can understand ƒ Make sure that personnel are suitably trained for the specified work ƒ Ensure that safety and information signs mounted on the device are always legible ƒ Trai...

Страница 10: ...iral housing for horizontal installation Motor dimensions in accordance with NEMA standards Suitable Wilo control devices e g Wilo EFC Variable Frequency Drive can control the power of the pumps continuously This allows optimization of the pump output for the demands of the installation and particularly economically efficient pump operation 4 1 1 Hydraulics The pump consists of a radially divided ...

Страница 11: ...ional information CH Approved fluids for heating pumps No oxygen binding agents no chemical sealant Ensure enclosed system from corrosion perspect ive Statement of date of manufacture The date of manufacture is stated in the format MMDDYYYY ƒ MM month ƒ DD day ƒ YYYY year 4 4 Type key Example NL HE 2x1 25x5 5 182 4T 460 2 TEFC NL HE Product family 2 Nominal diameter of Suction Flange 1 25 Nominal ...

Страница 12: ...N hp Measuring surface sound pressure level Lp A dB A 1 2 Pole 3550 rpm 4 Pole 1750 rpm 0 75 52 1 68 52 1 5 68 52 2 68 52 3 66 56 5 66 56 7 5 68 59 10 68 59 15 72 64 20 72 64 25 72 64 30 73 64 40 76 66 50 76 66 60 79 69 75 84 69 100 84 69 125 84 73 150 84 78 200 85 78 250 85 78 300 85 75 1 Spatial mean value of sound pressure levels within a cube shaped measuring area at a distance of 1 m from the...

Страница 13: ...le 2 Permissible forces and torques on the pump flanges If not all working loads reach the maximum permitted values one of these loads may exceed the normal limit value This is under the condition that the following additional conditions are fulfilled ƒ All force and torque components are limited to 1 4 times the maximum permitted value ƒ The forces and torques acting on each flange meet the requi...

Страница 14: ...uipment Use only properly functioning lifting equipment to lift and lower the pump Ensure that the pump does not become jammed during lifting and lowering Do not exceed the maxi mum bearing capacity of the lifting equipment Check that lifting equipment is function ing properly before use CAUTION Property damage due to incorrect transport To ensure proper alignment all equipment is pre assembled If...

Страница 15: ...ƒ Ensure the load is lifted vertically ƒ Prevent the suspended load from swinging 5 2 2 Proper lifting of the complete unit Fig 4 Lifting the complete unit ƒ Comply with applicable national safety regulations ƒ Use legally specified and approved lifting gear ƒ Select the lifting gear based on the prevailing conditions weather attachment point load etc ƒ Only attach the lifting gear to the attachme...

Страница 16: ...urges can lead to the destruction of the pump ƒ Structural components and foundations must be of sufficient stability in order to allow the device to be fixed in a secure and functional manner The operator is responsible for the provision and suitability of the building foundation ƒ Check that the available consulting documents installation plans design of the operat ing space inflow conditions ar...

Страница 17: ... be checked again ƒ Avoid accidental contact during operation The coupling should be protected with an OSHA compliant coupling guard 6 5 Installing the pump unit on a base CAUTION Danger of property and material damage A missing foundation or incorrect installation of the unit on the base can lead to a mal function of the pump Incorrect installation is not covered by the warranty Only have the pum...

Страница 18: ...laced under all middle bra cing C channels see below in figure Levelling and aligning the baseplate showing shim locations ƒ Level in both directions with additional shims ƒ Align the unit when installing on the base using a spirit level at the shaft pressure port The baseplate must be horizontal tolerance 0 006 inches per foot ƒ Fit anchor bolts in the provided drilled holes NOTICE The anchor bol...

Страница 19: ...ake the pressure temperature and fluid into account Check the gaskets for proper fitting The pipes must not transfer any forces to the pump Brace the pipes directly before the pump and connect them without tension Observe the permissible forces and torques on the pump connecting pieces The expansion of the pipes in the event of a temperature rise is to be compensated by suitable means Avoid air po...

Страница 20: ...larly in the case of very hot flu ids Adjustment may be required if the pump is required to pump very hot fluids Allow the pump to run at the actual operating temperature Switch off the pump then immediately check the alignment Precondition for reliable smooth and efficient operation of a pump unit is proper alignment of the pump and the drive shaft Misalignments can be the cause of ƒ excessive no...

Страница 21: ...al displacement Kr Angular displacement Kw degree Fig 12 Jaw coupling alignment ROTEX Size 14 19 24 28 38 42 48 55 65 75 90 100 110 125 140 160 180 Max axial misalignment Ka in 0 2 0 04 0 02 0 05 0 02 0 06 0 03 0 07 0 04 0 08 0 04 0 08 0 04 0 09 0 04 0 10 0 06 0 10 0 06 0 12 0 06 0 13 0 06 0 15 0 08 0 17 0 08 0 18 0 08 0 20 0 10 0 22 0 12 0 25 Max parallel misalignment with n 1 800 rpm Kr in 0 006...

Страница 22: ...ximum values found in tables Maximum RPM and Allowable Misalignment for EPDM couplings and Allowable Misalignment for flexible jaw couplings This requirement applies to every operating status including operating temperature and inlet pressure Checking the axial alignment Fig 15 Checking the axial alignment with a calliper gauge NOTICE The axial deviation of the two coupling halves must not exceed ...

Страница 23: ...ng torques for Lovejoy EPDM coupling halves Coupling Size Screw A lb in 38 M8 89 42 M8 89 48 M8 89 55 M10 150 65 M10 150 75 M10 150 Table 8 Tightening torques for Jaw type coupling halves ƒ Install the coupling guard 6 7 2 Alignment of the pump unit Any deviations in the measuring results indicate a misalignment In this case the unit must be realigned to the motor ƒ Loosen the hexagon head screws ...

Страница 24: ...hat the pump and drive are elec trically isolated Make sure that no one can turn on the power supply again before work is completed Make sure that all energy sources can be isolated and locked If the pump was switched off by a protective device it must be secured against switching back on again until the error has been remedied Electrical machines must always be grounded Grounding must be appropri...

Страница 25: ...ection of rotation of the motor while commissioning 6 8 1 Fuse on mains side Circuit breaker The size and switching characteristics of the circuit breakers must conform to the rated cur rent of the connected product Observe local regulations Residual current device RCD Comply with the regulations of the local energy supply company The use of a residual cur rent device is recommended If persons com...

Страница 26: ...he pump must not be operated outside of the specified operating range Do not operate the pump with the shut off devices closed Make sure that the NPSHA value is always higher than the NPSHR value CAUTION Risk of material damage due to the formation of condensate When using the pump in air conditioning or cooling applications the formation of con densate can cause pump corrosion WILO USA leaves ins...

Страница 27: ... until the suction line and the pump are completely filled 7 3 Checking the direction of rotation CAUTION Risk of property damage Danger of damage to the pump parts that rely on the fluid supply for lubrication Before checking the direction of rotation and commissioning the pump must be filled with fluid and vented Do not operate the pump with the shut off devices closed The correct direction of r...

Страница 28: ...auges to a pressurised pump Install pressure gauges on the suction and pressure side NOTICE It is recommended to attach a flow meter to determine the exact pump delivery rate CAUTION Risk of property damage due to motor overload To start up the pump use the soft start star delta connection or speed control ƒ Switch on the pump ƒ After reaching the speed slowly open the shut off device in the press...

Страница 29: ...eposits from occur ring in the pump compartment 8 2 Shutdown and storage WARNING Risk of injury and damage to property Dispose of the pump contents and rinsing fluid by taking the legal regulations into account Always wear protective clothing protective gloves and protective goggles when working ƒ Clean the pump thoroughly prior to storage ƒ Drain the pump completely and rinse thoroughly ƒ The rem...

Страница 30: ...the power supply and guard against acci dental switch on Any damage to the pump connection cable should only ever be rectified by a quali fied electrician Observe the installation and operating instructions for the pump motor and other accessories Reinstall any uninstalled safety devices such as terminal box covers once the work is complete WARNING Sharp edges on the impeller Sharp edges can form ...

Страница 31: ...gn of bearing damage The bearing temperature may be up to 50 C above the ambient temperature but never rise above 80 C ƒ Check the static gaskets and the shaft seal regularly for leakages ƒ For pumps with mechanical seals there is little to no visible leakage during operation If a gasket is leaking significantly this is a sign that the gasket surfaces are worn The gasket must be replaced The servi...

Страница 32: ...tor and other accessories Reinstall any uninstalled safety devices such as terminal box covers once the work is complete Maintenance and repair work require the pump be partially or completely dismantled The pump housing can be installed in the piping ƒ Switch off the energy supply to the pump and secure against switching on again ƒ Close all valves in the suction line and pressure pipe ƒ Drain th...

Страница 33: ...tion with the drive shaft facing downward The kit must be removed vertically to avoid damage to the impellers and other parts 5 Remove the housing seal 1 2 6 Remove the hexagon head screws 7 2 and remove the protective grid 7 1 7 Loosen the impeller nut 2 2 and remove along with the lock washer and impeller disc Version with mechanical seal optional mechanical seal on the sleeve 15 10 9 1 9 2 Fig ...

Страница 34: ...d check them for wear before installing them Damaged or worn parts must be replaced with original spare parts ƒ Coat location points with graphite or similar materials before installation ƒ Check the O rings for damage and replace if necessary ƒ Flat gaskets must be constantly replaced DANGER Risk of fatal injury due to electrical current Proceeding incorrectly when carrying out electrical work ca...

Страница 35: ...o the shaft 3 1 2 Push the shaft 3 1 into the bearing bracket 5 3 Insert the retaining rings 4 4 into the groove and the bearing cover 4 2 into the drilled hole of the bearing bracket 5 4 Push the V gaskets 4 3 and thrower 4 2 onto the shaft 3 1 5 Insert the key 3 3 into the shaft nut 6 Fasten the pump support foot 8 1 with the hexagon head screw 8 2 and lock washer 8 3 9 6 2 Assembling the slide ...

Страница 36: ...e spacer 9 2 onto the shaft 7 2 7 2 2 2 2 1 3 2 7 2 7 1 7 1 Fig 28 Fitting the slide in unit 1 1 1 2 14 Fig 29 Inserting the slide in unit 1 Mark positions of the parts that belong together with a coloured pen or scriber 2 Mount the impeller disc impeller 2 1 and key s 3 2 on the shaft and tighten with the impeller nut 2 2 3 Mount the protective grid 7 1 with interior hexagonal head screws 7 2 4 P...

Страница 37: ...n carrying out electrical work can lead to death due to electric shock Electrical work must be carried out by a qualified electrician in accordance with the locally applicable regulations WARNING No persons are allowed to be present inside the working area of the pump Persons may suffer serious injuries while the pump is in operation No persons may therefore be present inside the working area If p...

Страница 38: ...in the suction line Clean filter Reduce negative suc tion head by installing the pump lower X Incorrect direction of ro tation Change the motor con nection phases X Pump sucks air or the suction line is leaky Replace gasket Check suction line X Supply line or impeller clogged Remove clog X X Pump blocked by loose or jammed parts Clean pump X Air pockets in the piping Change the pipe layout or inst...

Страница 39: ...e X X Imbalance of the impeller Rebalance the impeller X Bearing damage Exchange bearing X Foreign object in the pump Clean pump X Pump pumps against closed shut off device Open the shut off device in the pressure pipe Table 12 Causes of error and remedies 11 Spare parts Spare parts may be ordered via a local installer and or Wilo customer service List of original spare parts Refer to the Wilo spa...

Страница 40: ...4 2 3 4 1B 4 4 4 2 4 3 4 4 1A 4 4 4 2 4 3 4 5 11 2 11 11 1 9 2 7 7 1 7 2 Fig 31 Pump with mechanical seal Item no Description Number Safety relevant 1 1 Pump housing 1 1 2 Flat gasket 1 X 2 1 Impeller 1 2 2 Nut 1 2 3 Disc 1 2 4 Disc 1 3 1 Shaft 1 3 2 Key 1 3 3 Key 1 4 1A Ball bearing 1 X 4 1B Ball bearing 1 X 4 2 Cover 1 4 3 V gasket 1 4 4 Retaining ring 1 ...

Страница 41: ...formation on the collection of used electrical and electronic products Proper disposal and appropriate recycling of this product prevents damage to the environ ment and putting your personal health at risk NOTICE Disposal in domestic waste is prohibited In the European Union this symbol may be included on the product the packaging or the accompanying documentation It means that the electrical and ...

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Страница 44: ...ggins Rd 300 Rosemont IL 60018 USA Tel 1 262 204 6600 Fax 1 229 584 0234 info us wilo com www wilo com us en_us WILO Canada Inc Bay 8 925 30th Street NE Calgary Alberta T2A 5L7 Canada Tel 1 403 276 9456 Fax 1 403 277 9456 info wilo canada com www wilo canada com ...

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