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Installation and operating instructions Wilo-Rexa NORM 27

MAINTENANCE AND REPAIR English

8.3.2.  Regrease the pump bearings

Grease amounts

Type

F1

F2

NORM-M15.77

60 g (2 oz)

110 g (4 oz)

NORM-M15.84

40 g (1.5 oz)

70 g (2.5 oz)

NORM-M25.61

60 g (2 oz)

110 g (4 oz)

RE 25.74E

60 g (2 oz)

110 g (4 oz)

RE 25.93D

60 g (2 oz)

110 g (4 oz)

NORM-M30.41

60 g (2 oz)

110 g (4 oz)

NORM-M50.21

70 g (2.5 oz)

180 g (6.5 oz)

Fig. 10.: Grease nipple 

F1+ Bearing on pump side
F2+ Bearing on the motor side

1.  Use a grease gun to inject the new grease into the 

grease nipples (F1+ and F2+).

2.  Clean grease nipple

8.3.3.  Vibration measurement

WARNING! Rotating parts! 

During operation, the coupling and the two 

drive shafts rotate. Danger of serious injuries 

to legs and arms. A vibration measurement 

may only be carried out if the coupling guard 

is firmly installed!

CAUTION! Risk of burns! 

The housing parts can heat up to well above 

40 °C (104 °F). There is a risk of burns! Wear 

heat-resistant protective gloves.

Fig. 11.: Illustration of the measuring points 

M1 Measuring point vertical vibration, top of bearing 

housing

M2

Measuring point horizontal vibration, lateral to 

 

bearing housing

The vibration measurement must be carried out 

at the duty point with the machine running.

1. 

Place the measuring point on the first measuring 

point: Top side of bearing housing

2.  Place the measuring tip on the second measuring 

point: Lateral to bearing housing

3.  The measured value may not exceed  

4.5 mm/s eff.

 (0.18 in/s). If the value is higher 

than this, consult the Wilo customer service.

8.3.4.  Visual inspection of coupling

Visual inspection of the coupling for wear and 

damage (see manufacturer’s instructions).

8.3.5.  Functional check of pencil electrode for sealing 

chamber monitoring

To check the pencil electrode, the pump has to  

be cooled to the ambient temperature, and the 

electrical connection for the pencil electrode  

has to be disconnected in the switchgear. The 

monitoring device can then be checked with an  

ohmmeter. The following values should be  

measured:

 -

This value must approach “infinity”. If the 

values are low, there is water in the oil. Please 

also observe the instructions of the optional 

evaluation relay.

If there are larger deviations, please consult the 

Wilo customer service!

8.3.6.  Oil change in the sealing chamber

The sealing chamber has separate openings for 

draining and filling the chamber.

WARNING! Risk of injury from hot and/or 

pressurised operating fluid!

 

After the hydraulics are switched off, the oil 

is still hot and pressurised. This can cause the 

screw plug to be ejected and hot oil to escape. 

There is a risk of injury or burns! First allow 

the oil to cool down to ambient temperature.

Filling quantities

Type

Filling quantity

NORM-M15.77

2.3 l (78 US.fl.oz)

NORM-M15.84

0.65 l (22 US.fl.oz)

NORM-M25.61

2.3 l (78 US.fl.oz)

RE 25.74E

2.3 l (78 US.fl.oz)

RE 25.93D

2.3 l (78 US.fl.oz)

NORM-M30.41

2.3 l (78 US.fl.oz)

NORM-M50.21

4.0 l (135 US.fl.oz)

Fig. 12.: Screw plugs 

D- Drain hole screw plug
D+ Filler hole screw plug

1.  If you can place a tank beneath the bearing hous-

ing to collect the operating fluid, you do not need 

to remove the pump.

2.  Carefully and slowly unscrew the screw plug (D+).

Caution: The operating fluid may be pressur

-

ised! This can cause the screw to be ejected at 

speed.

3.  Place a suitable tank beneath the screw plug (D-) 

to collect the operating fluid.

4.  Carefully and slowly unscrew the screw plug (D-) 

and allow the operating fluid to drain out. Dispose 

of the operating fluid in accordance with the 

requirements in the “Disposal” chapter.

5.  Clean the screw plug (D-), renew the seal ring and 

screw it back in.

6. 

Pour the new operating fluid in through the hole 

for the screw plug (D+). Note the recommended 

operating fluids and filling quantities!

7.  Clean the screw plug (D+), renew the seal ring and 

screw it back in.

Summary of Contents for Wilo-Rexa NORM

Page 1: ...6081510 02 04 2021 WH Pioneering for You Wilo Rexa NORM RexaNorm RE en Installation and operating instructions...

Page 2: ...Fig 2 Fig 1 A B 8 9 10 2 4 4 7 5 5 3 1 2 7 1 6 3 6...

Page 3: ...Fig 3B Fig 3A 1...

Page 4: ...Fig 4 8 2 4 7 5 3 1 6 Fig 5 1 Rexa NORM M15 77 2140 1400 370 790 860 370 36 29...

Page 5: ...Fig 1 150 0 3 1060 2100 2 6 900 0 3 900 0 3 1010 0 3 Fig 5 2 Rexa NORM M15 84 Fig 5 3 RexaNorm RE 25 74E RE 25 93D 1640 1060 290 600 660 36 29 290...

Page 6: ...Fig 5 4 Rexa NORM M25 61 M30 41 Fig 5 5 Rexa NORM M50 21 26 665 665 665 26 150 26 26 2300 1010 1060 765 765 765 26 198 26 26 26 1450 1500 2691...

Page 7: ...Fig 7 Fig 6 A A A A 2 4 4 5 5 5 5 5 5 3 1 S1 S1 X X Y Y Z Z Fz Mz My Mx Fy Fx...

Page 8: ...Fig 9 Fig 8 2 3 1 2 4 5 3 1...

Page 9: ...Fig 11 Fig 10 F2 F1 M1 M2...

Page 10: ...Fig 13 Fig 12 D D L...

Page 11: ...delivery 17 3 9 Accessories 17 4 Transportation and storage 17 4 1 Delivery 17 4 2 Transportation 17 4 3 Storage 17 4 4 Return delivery 18 5 Installation 18 5 1 General 18 5 2 Installation types 18 5...

Page 12: ...iod is stipulated in the General Terms and Conditions Any deviations must be contractually agreed 1 4 3 Spare parts add ons and modifications Only genuine spare parts from the manufacturer may be used...

Page 13: ...ng instructions in a language which the personnel can under stand Make sure that personnel are suitably trained for the specified work Ensure that safety and information signs mounted on the device ar...

Page 14: ...ibility that people can come into contact with the motor and the fluid the connection must be equipped with an additional residual current device RCD The hydraulics must always be earthed In a standar...

Page 15: ...n various standards are used as a basis for operating assembling and dismantling the pump 2 12 CE marking The CE marking is attached to the rating plate for the pump 3 Product description The pump is...

Page 16: ...ulics must not be operated in an explo sive atmosphere 3 4 Operation with frequency converters Operation on a frequency converter is possible NOTICE Also note all the information in the operating and...

Page 17: ...oted on the freight documentation 4 2 Transportation Only use lifting gear which is legally designated as such and officially approved The lifting gear must have sufficient bearing capacity so that th...

Page 18: ...In order to prevent damage to the device or seri ous injury during installation the following points must be observed Installation work assembly and installation of the pump may only be carried out by...

Page 19: ...to the baseplate using shackles Carrying straps wire ropes and plastic ropes or chains may be used as lifting equipment Bare shaft version The lifting equipment must be attached using a loop Chains m...

Page 20: ...ons for information on concrete quality edge dis tances and curing times Install the pump 1 Check suction and pressure side pipeline system for tight fit The pipeline system must be self supporting i...

Page 21: ...structions from manufacturer 4 Fasten the lifting equipment to the attachment points 5 Loosen the motor fixation on the baseplate 6 Slowly raise the motor by 1 2 mm 0 04 0 08 in 7 Place alignment plat...

Page 22: ...aling chamber monitoring Before the pencil electrode is connected it must be checked with an ohmmeter The following values must be complied with This value must approach infinity If the values are low...

Page 23: ...E Also note all the information in the operating and maintenance manual for the motor Operation on a frequency converter is possible The following parameters must be observed The standard speed of the...

Page 24: ...st measuring point M1 top side of bearing housing vertical vibration 2 Place the measuring point on the second meas uring point M2 laterally on the bearing housing horizontal vibration 3 The measured...

Page 25: ...risk of fatal injury from electric shock when working on electrical devices With all maintenance or repair work the motor must be disconnected from the mains by a qualified electrician and secured aga...

Page 26: ...de for sealing chamber monitoring if applicable Oil change in the sealing chamber Check the leakage chamber for leaks NOTICE If sealing chamber monitoring is installed the maintenance interval corresp...

Page 27: ...ent temperature and the electrical connection for the pencil electrode has to be disconnected in the switchgear The monitoring device can then be checked with an ohmmeter The following values should b...

Page 28: ...runs freely again 2 The sealing chamber monitoring optional has interrupted the electric circuit operator related See fault Mechanical seal leak sealing chamber monitoring reports a fault or shuts dow...

Page 29: ...defective Replace the mechanical seal and contact the plant Further steps for troubleshooting If the points listed here do not rectify the fault contact the Wilo customer service They can help you as...

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Page 32: ...Pioneering for You WILO SE Wilopark 1 44263 Dortmund Germany T 49 0 231 4102 0 F 49 0 231 4102 7363 wilo wilo com www wilo com Local contact at www wilo com contact...

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