Grundfos MQ User manual

GRUNDFOS INSTRUCTIONS

Installation and operating instructions

Grundfos.book Page 1 Monday, May 23, 2011 10:17 AM

LIMITED WARRANTY

Products manufactured by GRUNDFOS PUMPS CORPORATION (Grundfos) are

warranted to the original user only to be free of defects in material and workmanship

for a period of 24 months from date of installation, but not morethan 30 monthsfrom

date of manufacture. Grundfos' liability under this warranty shall be limited to repair-

ing or replacing at Grundfos' option, without charge, F.O.B. Grundfos' factory or

authorized service station, any product of Grundfos' manufacture. Grundfos will not

be liable for any costs of removal, installation, transportation, or any other charges

which may arise in connection with a warranty claim. Products which are sold but

not manufactured by Grundfos are subject to the warranty provided by the manu-

facturer of said products and not by Grundfos' warranty. Grundfos will not be liable

for damage or wear to products caused by abnormal operating conditions, accident,

abuse, misuse, unauthorized alteration or repair, or if the product was not installed

in accordance with Grundfos' printed installation and operating 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 defective product to be returned

to Grundfos or a service station must be sent freight prepaid; documentation sup-

porting the warranty claim and/or a Return Material Authorization must be included

if so instructed.

GRUNDFOS WILL NOT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUEN-

TIAL DAMAGES, LOSSES, OR EXPENSES ARISING FROM INSTALLATION,

USE, OR ANY OTHER CAUSES. THERE ARE NO EXPRESS OR IMPLIED WAR-

RANTIES, INCLUDING MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE, WHICH EXTEND BEYOND THOSE WARRANTIES DESCRIBED OR

REFERRED TO ABOVE.

Some jurisdictions do not allow the exclusion or limitation of incidental or conse-

quential damages and some jurisdictions do not allow limit actions on how long

implied warranties may last. Therefore, the above limitations or exclusions may not

apply to you. This warranty gives you specific legal rights and you may also have

other rights which vary from jurisdiction to jurisdiction.

Grundfos.book Page 2 Monday, May 23, 2011 10:17 AM

Contents

English (US)

Installation and operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Español (MX)

Instrucciones de instalación y funcionamiento. . . . . . . . . . . . . . . . . . . . . . . . . .23

Français (CA)

Notice d'installation et de fonctionnement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

Grundfos.book Page 3 Monday, May 23, 2011 10:17 AM

English (US)

English (US) Installation and operating instructions

CONTENTS

Page

1. Introduction

The MQ is a low-noise water supply system

consisting of pump, motor, pressure tank and

controller combined into one compact unit.

The system is suitable for both indoor and out-

door use.

The self-priming pump starts automatically

when water is consumed in the installation and

stops when consumption ceases. The internal,

built-in non-return valve prevents backflow

during priming and operation.

The MQ pump incorporates overtemperature

and dry-running protection as well as a user-

friendly control panel.

The built-in pressure tank reduces the number

of starts and stops in case of leakage in the

installation.

2. Items supplied

The MQ packaging contains these items:

• MQ water supply system with built-in non-

return valve

• non-return inlet valve in plastic bag

• installation and operating instructions.

1. Introduction 4

2. Items supplied 4

3. Symbols used in this document 5

4. Applications 5

4.1 Pumped liquids 5

5. Identification 6

5.1 Type key 6

6. Operating conditions 7

6.1 Suction lift 7

7. Mechanical installation 8

7.1 Location 8

7.2 Foundation 8

7.3 Space requirement 8

7.4 Pipework 8

7.5 Protective cover 10

8. Electrical connection 11

8.1 Generator or inverter 11

8.2 Wiring diagram 12

8.3 Winding resistance measurement 12

8.4 Winding resistance measurement 13

8.5 Start-up 14

9. Functions 15

9.1 Control panel 15

9.2 Pump stop 16

10. Maintenance 17

10.1 Service kits 17

10.2 Start-up after a long period of inactivity 17

11. Service 17

12. Technical data 18

12.1 Dimensions 18

12.2 Electrical data 18

12.3 Approvals 18

13. Accessories 18

14. Fault finding chart 19

15. MQ frequently asked questions 21

16. Disposal 22

WARNING

Prior to installation, read these

installation and operating instruc-

tions. Installation and operation

must comply with local regula-

tions and accepted codes of good

practice.

Grundfos.book Page 4 Monday, May 23, 2011 10:17 AM

English (US)

3. Symbols used in this document

4. Applications

The MQ water supply system is designed for

these typical applications:

• water pressure boosting

(maximum inlet pressure: 40 psi)

• water supply from wells (maximum suction

lift: 25 ft), for example

– in private homes

– on farms

– in market gardens and other large gar-

dens.

The pump is suitable for rain water.

4.1 Pumped liquids

Thin, clean, non-aggressive liquids, not con-

taining solid particles or fibres.

WARNING

If these safety instructions are not

observed, it may result in personal

injury!

Caution

If these safety instructions are not

observed, it may result in malfunc-

tion or damage to the equipment!

Note

Notes or instructions that make

the job easier and ensure safe

operation.

Grundfos.book Page 5 Monday, May 23, 2011 10:17 AM

English (US)

5. Identification

5.1 Type key

Fig. 1 MQ water supply system. Protective cover is required for outdoor use.

Example MQ 3 -35 A -O -A BVBP

Pump type

Nominal flow rate [m³/h]

Head [m]

Code for pump version

A: Standard

Code for pipework connection

Code for materials

A: Standard

Code for shaft seal

TM04 3648 4908

Base plate

Drain plug

Suction

port

Priming plug

Discharge port Control panel Pressure

tank cover

End-cover

plug

Protective cover

(accessory)

Grundfos.book Page 6 Monday, May 23, 2011 10:17 AM

English (US)

6. Operating conditions

6.1 Suction lift

The maximum suction lift of the pump can be

determined from the diagram, page 62.

Example:

If the suction lift is 10 ft, the length of the suc-

tion pipe must not exceed 72 ft.

MQ 3-35 MQ 3-45

Maximum flow rate [gpm] 22

Maximum pressure [psi] 51 65

Maximum system pressure [psi] 108

Maximum suction lift [ft]; see page 62 25

Minimum ambient temperature [°F]/[°C] 32/0

Maximum ambient temperature [°F]/[°C] 113/45

Minimum liquid temperature [°F]/[°C] 32/0

Maximum liquid temperature [°F]/[°C] 95/35

Net weight [lbs] 29

Sound pressure level [dB(A)] < 70

Tank volume [oz] 13.5

Air pressure in tank [psi] 22 to 25

Connections 1" NPT

Priming and drain plugs 3/8" GAS

Grundfos.book Page 7 Monday, May 23, 2011 10:17 AM

English (US)

7. Mechanical installation

7.1 Location

The pump is suitable for indoor and outdoor

installation. It is resistant to sunlight.

7.2 Foundation

Mount the pump on the base plate with hori-

zontal suction port and vertical discharge port.

The pump must be installed horizontally.

The maximum permissible inclination angle is

± 18 °. See fig. 2.

Fig. 2 Horizontal installation of the MQ

To prevent movement and vibrations, the

pump and base plate can be secured to a solid

foundation by means of the bolt holes in the

base plate. For pipework connection, see sec-

tion 7.4 Pipework.

7.3 Space requirement

For inspection and service, allow a minimum

clearance of 60" behind the pump.

Fig. 3 Minimum clearance behind the

pump

Being self-cooling, the pump requires no

space or ventilation at the sides.

7.4 Pipework

The pump is supplied with 1" NPT screwed

connections. Fit the connections in the suction

and discharge ports. See fig. 4. The pump dis-

charge port is flexible, ± 5 °, to facilitate the fit-

ting.

Fig. 4 Fitting of screwed connections in

suction and discharge ports

Note

For outdoor installation, the pump

must be fitted with a protective

cover (accessory). See section

7.5 Protective cover and

13. Accessories.

Note

Should the unlikely event of an

internal leakage occur, pumped

liquid will be drained out from the

base and/or end cover instead of

damaging the pump. Install the

pump in such a way that no unde-

sirable collateral damage can

arise.

TM01 9691 2600

Max. ± 18 °

TM04 3746 5008

Note

Ensure that the maximum ambient

temperatures do not exceed the

values stated in section

6. Operating conditions.

Note

Never use unnecessary force

when connecting the pipes.

TM01 9698 2600

60"

Grundfos.book Page 8 Monday, May 23, 2011 10:17 AM

English (US)

Carefully screw the discharge connection into

the discharge port, using a spanner or similar

tool. Hold the discharge connection, and

tighten the pump discharge union nut with your

hand. See fig. 5.

Fig. 5 Correct: Tighten the discharge

union nut with your hand

Fig. 6 Wrong: Do not use a tool to tighten

the discharge union nut

7.4.1 Suction pipes connected to a well

If the pump draws water from a well, we rec-

ommend to fit a foot valve to the end of the

suction pipe. See fig. 7.

Fig. 7 Suction pipes connected to a well

7.4.2 Suction hose instead of pipe

If a suction hose is used instead of a pipe, the

hose should not exceed the lengths stated in

the graph, page 62. The suction hose must be

minimum Ø1". The hose must be of the non-

collapsible type.

7.4.3 Long suction pipes

A separate non-return inlet valve is supplied

with the pump. In case of long suction pipes,

we recommend to fit the non-return inlet valve

in the pump suction port. See section

7.4.4 Fitting of the non-return inlet valve

The pipes must be adequately supported on

either side of the pump to avoid straining the

pump connections.

7.4.4 Fitting of the non-return inlet valve

The non-return inlet valve reduces the risk of

losing pump priming in negative suction appli-

cations and improves the auto-aspiration

capability, for example in water supply from a

cistern.

Install the non-return inlet valve as follows,

see fig. 8:

1. Remove the suction connection of the

pump.

2. Fit the non-return inlet valve into the suc-

tion port in the direction shown in fig. 8.

3. Refit the pump connection.

Fig. 8 Fitting of non-return inlet valve

TM04 4271 1009TM 044272 1009TM01 9693 2600

Foot valve

Note

Applications with positive inlet

pressure do not require installa-

tion of the non-return inlet valve,

due to the fact that the MQ pump

incorporates an internal non-

return valve at the discharge side.

TM 04 4121 0809

Grundfos.book Page 9 Monday, May 23, 2011 10:17 AM

English (US)

7.5 Protective cover

The protective cover protects the control panel

against the weather. It is available as an

accessory. See section 13. Accessories.

To fit the protective cover, click the cover onto

the top of the control panel so that it engages

with the top cooling ribs.

To remove the cover, pull the two clips out-

wards, free of the cooling ribs, and pull the

cover upwards.

Fig. 9 Protective cover

Note

Failure to use the protective cover

in outdoor installations will invali-

date the warranty.

TM04 3745 5008

Grundfos.book Page 10 Monday, May 23, 2011 10:17 AM

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