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13

English (US)

7.5 Wiring diagrams

Fig. 16 Three thermal switches (PTO, bimetallics)

Fig. 17 Three PTC sensors

7.6 Direction of rotation

When the electrical connections have been carried out, 
check that the propeller is rotating in the correct direction. 
When viewed from the motor, the propeller should rotate 
clockwise. 
An arrow on the motor housing shows the correct direction of 
rotation.

If the propeller rotates in the wrong direction, interchange two 
phases of the mains supply (L1, L2, L3).

7.7 Protection from electro-chemical corrosion

Two different metals or alloys cause electro-chemical corrosion if 
they are connected by an electrolyte. This applies if more than 
one pump is installed in the same tank. We recommend the 
following additional protection:

galvanic separation of the earth conductor from the neutral 
conductor or

galvanic separation of the mains supply by means of an 
isolation transformer.

The earth conductor must be separated in such a way as to 
ensure that no direct current can flow through it. It must still 
function as a protective conductor. This can be achieved with a 
limiting unit (polarization cell or anti-parallel diode) or an isolation 
transformer.

Fig. 18 Protection from electro-chemical corrosion

7.8 Frequency converter operation

The SRP pumps are designed for frequency converter operation 
in the 40 to 60 Hz range. However the SRP pumps can run down 
to 10 Hz in min frequency, having sufficient cooling in mind.

T

M

02

 49

40

 18

02

Terminals

Description

1, 2, 3, 4, 5, 6

Ends of the three stator windings
(U1, U2, V1, V2, W1, W2) 

11, 12

Thermal switches (F6)

21, 22

Leak sensor in gearbox (B)

TM

02 49

32 18

02

Terminals

Description

1, 2, 3, 4, 5, 6

Ends of the three stator windings
(U1, U2, V1, V2, W1, W2) 

31, 32

PTC sensors (according to DIN 44 081) 
(

1, 

2, 

3)

21, 22

Leak sensor in gearbox (B)

B

LS

V2

U2

W2

W1

V1

U1

PE

PTO

LS

V2

U2

V1

U1

W2

W1

PTC

PE

T

M

02

 94

80

 27

04

Pos.

Designation

1

Limiting unit

2

Earth conductor

3

Isolation transformer

Warning

When using an isolation transformer, the ratio 
between starting current and rated current (I

A

/I

N

must not be altered.

L1
L2
L3
N
PE 

1

3

2

2

Summary of Contents for SRP Series

Page 1: ...GRUNDFOS INSTRUCTIONS SRP 60 Hz North America Installation and operating instructions ...

Page 2: ......

Page 3: ...ble of contents SRP 3 English US Installation and operating instructions 4 Español MX Instrucciones de instalación y funcionamiento 19 Français CA Notice d installation et de fonctionnement 34 Appendix 49 ...

Page 4: ...ing instructions To obtain service under this warranty the defective product must be returned to the distributor or dealer of Grundfos products from which it was purchased together with proof of purchase and installation date failure date and supporting installation data Unless otherwise provided the distributor or dealer will contact Grundfos or an authorized service station for instructions Any ...

Page 5: ...tor 18 11 2 Gearbox 18 11 3 Shaft seals 18 11 4 Propeller 18 11 5 Sound pressure level 18 12 Disposal 18 Warning Prior to installation read these installation and operating instructions Installation and operation must comply with local regulations and accepted codes of good practice Warning The use of this product requires experience with and knowledge of the product Persons with reduced physical ...

Page 6: ...lue 4 to 10 Maximum sludge index 14 98 gallon lb 125 ml g Maximum dynamic viscosity 500 CSt mPas Maximum density 8 846 lb gallon 1060 kg m3 Chloride content 1 67 x 10 3 lb gallon 200 mg l for stainless steel AISI type 304 Voltage tolerance 10 10 of nameplate value Enclosure class IP68 Insulation class F Maximum installation depth 66 ft 20 m below liquid level Maximum number of starts per hour 20 S...

Page 7: ...e pump has never been in use This is necessary because of natural aging of mineral oil lubricants TM04 9249 1037 Pos Description 1 Type designation 2 Production code 3 Propeller diameter 4 Liquid temperature range 5 Product number 6 Enclosure class according to IEC 7 Serial number 8 Insulation class 9 Rated voltage 10 Rated speed propeller 11 Weight 12 Starting current 13 Frequency 14 Number of po...

Page 8: ... the following two requirements For pumps with vortex shield the distance must at least be equal to the propeller diameter For pumps without vortex shield the distance must at least be equal to 1 5 times the propeller diameter See fig 3 Fig 3 Distance to liquid surface and tank bottom Fig 4 Open installation Guide claws are only available for SRP xx 32 Caution Never hang the pump by the power cabl...

Page 9: ...ail with the profile section on the connection flange Shorten the column profile pos 2 to the correct length to match the position of epoxy insulator pos C at the top mounting bracket A gap of 0 2 to 0 4 in 5 to 10 mm between collar of epoxy and guide rail is optimal See fig 8 8 Remove the epoxy insulator and the turnable metal part by removing the center screw pos A and the two mounting screws po...

Page 10: ...d slide it over the guide rail 19 Slowly lower the pump into the tank and down to position on the connection flange 20 Mount the cable sock pos 18 to the top mounting bracket using the shackle and pull the motor cable through it to the desired position See fig 12 The power cable should be slightly tightened Fig 12 Top mounting bracket with lifting and safety cables and cable sock 21 Dismantle the ...

Page 11: ...ing When the maximum winding temperature is reached the switch will open the circuit and stop the motor When the windings have cooled to normal temperature the switch will close the circuit and the motor can be restarted See notes in fig 16 section 7 5 Wiring diagrams Thermal switches F6 Two conductors terminals 11 and 12 Maximum operating voltage of switch 250 V Maximum switching current 2 5 A at...

Page 12: ...d via a thermal delay relay according to local regulations The relay must be adjusted to the rated current stated on the nameplate Electro thermal all pole triggers in all six mains conductors U1 V1 W1 and U2 V2 W2 7 4 Starting method In general it is advisable to use Soft start or Variable speed drive in order to lower wear and tear on the equipment Continuous operation The SRP recirculation pump...

Page 13: ...rated in such a way as to ensure that no direct current can flow through it It must still function as a protective conductor This can be achieved with a limiting unit polarization cell or anti parallel diode or an isolation transformer Fig 18 Protection from electro chemical corrosion 7 8 Frequency converter operation The SRP pumps are designed for frequency converter operation in the 40 to 60 Hz ...

Page 14: ...e the pump Grundfos must be contacted with details about the pumped liquid etc before the pump is returned for service Otherwise Grundfos can refuse to accept the pump for service Possible costs of returning the pump are paid by the customer However any application for service no matter to whom it may be made must include details about the pumped liquid if the pump has been used for liquids which ...

Page 15: ...als speedy sleeve and wear ring and replace them if worn If the oil contains water replace the mechanical shaft seal Check the oil level twice a year If refilling is required See section 9 3 1 Oil quality Propeller All Check the propeller regularly for wear and tear Remove any material wound round the propeller such as ropes threads etc which may cause uneven running and oscillation of the install...

Page 16: ...oil into the oil chamber through the filling hole pos 2 Quantity according to section 9 3 2 Oil quantity 8 Refit screw pos 2 Fig 20 Position of oil drain and oil filling screws Type Gearbox oz l SRP 11 12 524 40 5 1 2 SRP 15 12 628 SRP 19 12 720 SRP 26 12 805 SRP 30 12 883 SRP 40 12 513 SRP 55 12 607 SRP 75 12 722 SRP 95 12 805 SRP 48 20 254 SRP 68 20 299 SRP 95 20 363 84 5 2 5 SRP 136 20 406 84 5...

Page 17: ...oad relay Set the relay to the rated current See section 7 3 Overload relays d Leak sensor has cut out the pump Contact Grundfos e Humidity in motor Contact Grundfos 3 No liquid or inade quate quantity is pumped even if the motor is running a Propeller rotates in the wrong direction Interchange two phases of the mains supply b Pump runs on two phases 1 Check the electrical connections 2 Replace fa...

Page 18: ...er of starts per hour 20 Enclosure class IP68 Insulation class F Material motor housing Cast iron ASTM A48 Class 40B epoxy coated Ambient temperature 41 F to 104 F 5 C to 40 C Type Planetary gearbox Gears Hardened and ground steel Monitoring of shaft seal Leak sensor incorporated in gearbox Drive end bearings Two tapered roller bearings Material gear casing Cast iron ASTM A48 Class 40B epoxy coate...

Page 19: ...2 805 9 5 264 6 120 SRP 48 20 254 4 8 35 7 8 910 32 7 8 835 29 7 8 757 32 3 8 824 2 9 16 66 26 3 8 670 9 1 16 230 1 25 441 200 SRP 68 20 299 6 8 441 200 SRP 95 20 363 9 5 44 1 16 1119 33 5 8 855 39 1 8 996 529 1 240 SRP 136 20 406 13 6 551 2 250 SRP 95 32 260 9 5 44 1 2 1129 48 5 8 1237 39 9 16 1006 48 1 4 1225 2 9 16 66 40 1015 10 1 2 267 1 25 771 6 350 SRP 163 32 308 16 3 793 7 360 SRP 204 32 33...

Page 20: ...tion 3905 Enterprise Court IL 60504 Aurora Phone 1 630 236 5500 Telefax 1 630 236 5511 Canada GRUNDFOS Canada Inc 2941 Brighton Road Oakville Ontario L6H 6C9 Phone 1 905 829 9533 Telefax 1 905 829 9512 México Bombas GRUNDFOS de México S A de C V Boulevard TLC No 15 Parque Industrial Stiva Aeropuerto Apodaca N L C P 66600 Phone 52 81 8144 4000 Telefax 52 81 8144 4010 ...

Page 21: ... ahead makes it possible Innovation is the essence The name Grundfos the Grundfos logo and the payoff Be Think Innovate are registrated trademarks owned by Grundfos Management A S or Grundfos A S Denmark All rights reserved worldwide 97761676 0611 US ECM 1065734 ...

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