Davey HS Series Benutzerhandbuch

Note:

Product specifications may change without notice.

Drawings are indicative only, product appearance may change slightly.

® Davey is a registered trade mark of Davey Products Pty Ltd.

HS SERIES MULTISTAGE PUMPS

MODELS: HS50-05 HS50-06

HS60-06 HS60-08

SERVICING INSTRUCTIONS

SI17/1550/1001

Further information can be found in

Hydrascan®Trouble Shooting Guide (SI10/500/1000)

and X Series Motors (SI05/500/1000) Servicing Instructions

Davey Products Pty Ltd

Member of the GUD Holdings Ltd Group

ABN 18 066 327 517

Head Office and Manufacturing

6 Lakeview Drive,

Scoresby, Australia 3179

Ph: +61 3 9730 9222

Fax: +61 3 9753 4100

Website: www.davey.com.au

Customer Service Centre

Ph: 1300 367 866

Fax: 1300 369 119

E-mail: [email protected]

Interstate Offices

Sydney – Brisbane – Adelaide

Perth - Townsville

International

6 Lakeview Drive,

Scoresby, Australia 3179

Ph: +61 3 9730 9121

Fax: +61 3 9753 4248

E-mail: [email protected]

Germany

Kantstrasse 47,

04275 Leipzig

Ph: +49 341 301 0412

Fax: +49 341 301 0413

E-mail: [email protected]

New Zealand

8 Ashfield Street,

Glenfield, Auckland 1310

Ph: +64 9 444 3622

Fax: +64 9 444 2179

Website: www.daveynz.co.nz

E-mail: [email protected]

USA

1005 N. Commons Drive

Aurora, Illinois 60504

Ph: +1 630 898 6976

Fax: +1 630 851 7744

Website: www.daveyusa.com

E-mail: [email protected]

TOOLS REQUIRED TORQUE SETTINGS

•5mm Allen Key Casing screws 7-9Nm

•Pozi Drive Screw Driver, 2 point Check valve 4-7Nm

•17mm Ring Spanner Socket Impeller nut 10Nm

•Flat Blade Screw Driver

WARNINGS

WARNING: Automatic reset thermal overloads will allow the pump to restart without warning.

Always disconnect the pump motor from the electrical supply before maintenance or repairs.

ALL ELECTRICAL WORK TO BE PERFORMED BY SUITABLY QUALIFIED

ELECTRICAL PERSONNEL.

Always disconnect from electrical supply BEFORE any work is carried out.

Release pump pressure before undoing any pipe work.

*NOTE: For protection, the Davey pump motor is fitted with an automatic reset thermal overload,

constant tripping of this overload indicates a problem e.g. low voltage at pump, excessive

temperature (above 50°C) in pump enclosure.

WARNING: When servicing or attending pump, always ensure power is switched off and lead

unplugged. Electrical connections should be serviced only by qualified persons.

Care should also be taken when servicing or disassembling pump to avoid possible injury from hot

pressurised water. Unplug pump, relieve pressure by opening a tap on the discharge side of the

pump and allow any hot water in the pump to cool before attempting to dismantle.

IMPORTANT: DO NOT USE petroleum based fluids or solvents (e.g. Oils, Kerosene, Turpentine,

Thinners, etc) on the plastic pump components or seal components.

HS SERIES MULTISTAGE PUMP ASSEMBLY

1. Fit the ceramic wear face to the stainless steel backplate using a little water on the

rubber boot. Ensure that it is square and pushed all the way into the backplate.

2. Put the slinger onto the motor shaft and press it all the way down to the drive

endshield. Ensure that it is put on in the right direction

with the taper facing forward.

3. Assemble the backplate to the motor and put the mechanical seal on using a little

water on the rubber boot and pushing it down over the shaft until the seal faces

meet. The carbon seal face should be in contact with the ceramic wear face.

4. Stand the motor vertically on the fan end for ease of assembly of impellers and

stage bodies.

5. Fit the last stage impeller with neck ring facing you and push it down onto the

mechanical seal. You will see that there are two flats running the length of the shaft

and two corresponding flats in the impeller for better drive.

6. Next fit the floating wear ring. This should fit over the neck ring of the impeller.

HS SERIES MULTISTAGE PUMP ASSEMBLY

7. Fit the last stage body. This is the one with the exit slots in it and continue to build

with the next impeller and wear ring. There are no clearances or spacers to worry

about as the impeller has the spacer inbuilt to minimise

the number of components in the pump.

8. Fit the stage body and the next impeller and wear ring. One more stage body and

another impeller in the case of a four-stage pump or a spacer in place of the impel-

ler if it is a three-stage pump. The impeller spacer or the impeller should be sitting

slightly proud of the shaft steam to enable you to tighten the nut and washer and

lock the impellers in position.

9. Tighten nut to required torque setting.

10. Locate the first stage body with the word “top” adjacent to the outlet port of the

pump. Note: It is important that this stage body is assembled correctly to aid in the

priming of the pump.

HS SERIES MULTISTAGE PUMP ASSEMBLY

11. Fit the two orings to the assembly and lightly lubricate them with an approved

silicon grease.

12. Assemble the pump casing with the eight casing screws to the required torque

settings.

13. Replace the priming plug and oring and screw the non-return valve cartridge into

the suction port, in a clockwise rotation using non specified tools (eg. a screwdriver

handle, a pair of pliers, a large coin or a flat blade - 20mm wide).

14. Your pump is now ready for water testing.

15. The Davey HS casing design allows for the motor to be fitted at 90 degrees to the

outlet port to cater for wall mounting of the motor. The outlet port and first stage

body should be uppermost during this configuration.

HS SERIES MULTISTAGE PUMP DISASSEMBLY

1. Disconnect the power supply and release the pump pressure before removing the

pump to do any repairs.

2. Remove the eight casing screws with a 5mm allen key turning anti-clockwise. Sit

the pump on the fan cowl for easier removal of the screws.

3. You may have to put a flat blade screwdriver between the casing and the back plate

to pry it off.

4. The first stage body should lift off and it should also have an oring with it. If it is not

still attached to the stage body, check inside the casing to see if it is stuck to the

inside. If so remove it and check for flat spots and tears.

5. You will now see a stainless steel nut that holds the rest of the pump assembly in

place. This is removed with a 17mm ring spanner. You will need to sit the pump

horizontally and remove the fan cowl. Place a flat blade screwdriver into the slot in

the rotor, hold it tight and give the spanner a sharp tap with a softhead mallet to

loosen the impeller screw.

6. Remove the impellers wear rings and stage bodies and check for wear or rub

marks.

7. Remove the mechanical seal and casing oring. Check for wear or signs of heat on

the seal faces and rubber boot. Check the oring for tears or flat or pinched spots.

8. The back plate can be removed by inserting a small punch through the holes in the

motor end shield and tapping it off. Remove the slinger from the shaft. Check,

clean or replace all parts before you reassemble the pump.

TROUBLE SHOOTING

1. Pump not delivering water or not building up pressure

May be caused by one or more of the following :

a. Pump not properly primed

b. Foot valve leaking on suction lift

c. Suction lift too high

d. Suction piping not correctly sealed or holed allowing air to enter pump suction

e. Blocked or worn impellers

f. Insufficient water supply source

g. Reverse rotation

2. Motor not running

May be caused by one or more of the following :

a. Power failure

b. Blown fuse

c. Motor overload tripped

d. Motor windings faulty

3. Motor thermal overload tripping

May be caused by one or more of the following :

a. Low voltage supply

b. Motor or pump seized

c. Motor windings faulty

d. Frequent cycling

To check for correct automatic pressure system operation:

• Close gate valve at pump outlet, allowing pump to run and build up pressure until it

switches off at cut-out setting of pressure switch or Hydrascan®.

• Open gate valve at pump outlet to allow water to discharge to an outlet point.

Pump will automatically switch on at cut-in setting of pressure switch or Hydrascan.

TROUBLE SHOOTING CONTINUED...

AUTOMATIC SYSTEMS

5. Pump switching on and off frequently when no taps are turned on

May be caused by one or more of the following :

a. Leaking footvalve or in-line checkvalve

b. Water leaking from suction or delivery piping

c. Ball valve in toilet cistern, hot water system, or stock troughs allowing unit to

overflow

d. Pressure tank not retaining air pressure or air change too high (pressure

switch model only)

6. Pump not switching off or taking too long to switch off (Pressure Switch

model only)

May be caused by one or more of the following :

a. Voltage supply too low

b. Leak in discharge pipe or fitting, taps etc.

c. Worn or blocked pump components, impeller, casing etc.

d. Drop in water level in water supply source

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