EBARA DSC4 Series Manual de operación y mantenimiento

Submersible Wastewater, Sewage Pump

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 

INSTRUCTION MANUAL P.1

PM32U 

1. Preface

Design of this EBARA pump is based on superior engineering and long experience.

To prevent trouble and provide satisfactory operation and long life, it is important to

understand the EBARA pump thoroughly by careful study of this manual. If any

questions arise regarding this manual, please direct them to EBARA. Your questions

will be promptly answered and your suggestion may be considered for incorporation

into our future products.

CAUTION : THIS INSTRUCTION MANUAL INCLUDES NECESSARY ITEMS

FOR INSTALLATION, OPERATION AND MAINTENANCE. READ THIS MANUAL

CAREFULLY TO ENSURE CORRECT INSTALLATION, OPERATION AND

MAINTENANCE.

BE SURE TO KEEP THIS INSTRUCTION MANUAL ON HAND FOR FUTURE

REFERENCE.

Safety Labels

Four different types of safety labels are used in this manual. Please study the labels

carefully so that the meaning of any safety warning you encounter is immediately

clear.

DANGER :indicates a potentially hazardous situation which, if not avoided,

will result in death or serious injury.

WARNING :indicates a potentially hazardous situation which, if not avoided,

could result in death or serious injury

CAUTION :indicates a potentially hazardous situation which, if not avoided,

may result in minor or moderate injury or possible damage to the

equipment or machine.

Note : is used to call attention or to emphasize essential information.

 

INSTRUCTION MANUAL P.2

PM32U 

2. Acceptance Inspection

Upon arrival of the pump –

(1) Check the nameplate information for agreement with specifications in respect

to model identification, head, pumping capacity, speed, output, voltage and

frequency.

(2) Check the pump has not been damaged during shipment and all plugs and

fastening bolts properly tightened.

(3) Check accessories and spare parts against the packing list.

If any problem is found, contact your dealer.

3. Installation

3.1 Foundation

Place concrete to build up the floor and discharge elbow foundations to the values

shown in installation drawing. The discharge elbow foundation must have sufficient

size and strength to support the weight of the pump body, submersible motor and

accessories plugs the weights of the discharge pipe, and to absorb vibrations and

impacts resulting from operation. Usually, it should weigh more than seven times the

pump weight.

3.2 Floor Frame (Fig. 1, 2 and 3)

Install a cable lead-out elbow and a floor frame on the floor over the pump pit. Attach

a guide pipe holder securely to the floor frame with bolts. As the guide pipe must be

installed vertically (with a tolerance of 1mm (0.04in) or less per 1m (3.3ft)), carefully

check the positional relationship between the floor frame location and the discharge

elbow foundation. (See Fig. 1 ∗)

Cable lead-out elbow

Fig. 1

 

INSTRUCTION MANUAL P.3

PM32U 

If the guide pipe holder is attached directly to the concrete, use hole-in anchor bolt as

shown in Fig. 3.

Fig. 2 Fig. 3

CAUTION : IF THE CABLE LEAD-OUT ELBOW IS TOO SMALL IN DIAMETER,

THE CABLE MAY BE HEATED WHERE IT RUNS THROUGH THE ELBOW.

3.3 Discharge Elbow Installation (Fig. 4)

WARNING : WHEN LIFTING THE PUMP, USE APPROPRIATE CRANE (OR

HOIST) AND LIFT SYSTEM.

CHECK POSITION AND TIGHTNESS OF LIFT SYSTEM SO THAT WEIGHT OF

THE PUMP IS NOT UNBALANCED.

FAILURE TO OBSERVE THIS PRECAUTION CAN RESULT IN SERIOUS

ACCIDENTS.

Install the discharge elbow level on the bottom on the pump pit, and connect the

guide pipe.

Hole-in anchor bolt

 

INSTRUCTION MANUAL P.4

PM32U 

Fig 4

Support the guide pipe with bushings on discharge elbow and the guide pipe holder.

If the guide pipe requires a length exceeding 5.5m (18ft), an extension or

intermediate support may become necessary, in which case we are available for

consultation. When installing the discharge elbow, the guide pipe must be vertical

(with a tolerance of 1mm (0.04in) or less per 1m (3.3ft)), using a plum bob. If it is not

vertical, it may become impossible to lift pump. Discharge elbow level should be

within 0.1mm (0.04in) per 1m (3.3ft), both in the “X”and “Y”directions shown in Fig.

4. It is recommended practice that pipe installation be carried out with the discharge

elbow covered to protect against entry of concrete and mortar during the work.

CAUTION : FIX THE ANCHOR BOLTS TIGHTLY BY, FOR EXAMPLE, BY

WELDING THEM TO THE REINFORCEMENT BAR, ETC.

3.4 Discharge Pipe Installation (Fig. 5)

When mortar under discharge elbow has been sufficiently set, proceed with piping to

the discharge side.

CAUTION : DURING THIS WORK, TAKE CARE NOT TO SUBJECT THE

DISCHARGE ELBOW TO EXCESSIVE WEIGHTS.

 

INSTRUCTION MANUAL P.5

PM32U 

Fig. 5

3.5 Water Level Switch Installation (Fig. 6)

Install a water level switches for use during automatic operation. If a float type switch

is used, each pump will required a total of 3 (or 4) for starting, stopping, (low level

alarm) and high-level alarm.

Above low limit level

Fig. 6

 

INSTRUCTION MANUAL P.6

PM32U 

3.6 Check the Followings Points (1) through (6) Prior to Pump Installation

(1) Ensure that the mechanical seal chamber is filled with specified amount of oil.

*ICS opt.

Ensure that the coolant chamber is filled with specified amount of coolant.

(2) All plugs and fastening bolts are properly tightened.

(3) The sealing chamber is not leaking.

(4) The pump is not damage and the cable glands and cables are in satisfactory

condition.

(5) Insulation resistance values are within limits. (See 3.6.2)

(6) Other points that require particular attention. (See 3.6.3)

3.6.1 Oil Supply (Fig. 7, 8 and 9)

Mech. Air vent.

Mech. Oil port

Mech. Air vent.

Mech. Oil port

Fig. 7 Fig. 8

The motor shaft is sealed with a tandem mechanical seal. The seal chamber provide

between the two sealing stages can be filled with turbine oil by standing the pump

vertically and unplugging “oil port”and “air vent”.

CAUTION : THE SEAL CHAMBER MAY BE UNDER PRESSURE. HOLD A

RAG OVER THE OIL PLUG TO PREVENT SPLATTER.

 

INSTRUCTION MANUAL P.7

PM32U 

Pour the specified oil into the sealing chamber through the “oil port”until the oil flows

out of the “air vent”. (See Table 1)

After the sealing chamber is filled to the specified level, put a sheet gasket between

the plug and the boss, and tighten the plug.

Floor surface

Oil funnel

Turbine Oil ISOVG32

Fig. 9

Use one of the following oils or

equivalent.

Shell : Turbo oil T32

Mobil : Mobil DTE oil light

Esso : Esso Tresso 32

Exxon : Teresstic 32

Gulf : Harmony 32, Crest 32

Caltex : Rega Oil R&O 32

 

INSTRUCTION MANUAL P.8

PM32U 

Table 1

Pump

Model

Code

Approx.

Oil Capacity

(liter)

Pump

Model

Code

Approx.

Oil Capacity

(liter)

150DSC4

AC-46050

AO-46050

2.4

300DSC4

FC-66050

FO-66050

2.4

AC-46060

AO-46060

FC-66060

FO-66060

AC-46075

AO-46075

GC-66075

GO-66075

2.3

BC-46100

3.1

EEC-66175

5.2

BC-46120

2.4

EEC-66200

CC-46120

3.2

EEC-66215

CC-46145

EEC-66245

CC-46175

400DSC4

D1C-106050

4.5

HC-46050

HO-46050

3.2

D1C-106060

D1C-106075

HC-46060

HO-46060

500DSC4

D2C-1060100

5.5

G1C-1060120

6.2

HC-46075

HO-46075

G1C-1060145

G2C-860175

C1C-46175

4.3

G2C-860200

C1C-46200

G2C-860215

C1C-46215

G2C-860245

C1C-46245

250DSC4

EC-66100

EO-66100

3.9

EC-66120

EO-66120

EC-66145

EO-66145

 

INSTRUCTION MANUAL P.9

PM32U 

3.6.1 Coolant Supply (Fig. 7c, 8c and 9c)

Mech. Air vent.

Mech. Oil port

Mech. Air vent.

Mech. Oil port

Fig. 7c Fig. 8c

The motor shaft is sealed with a mechanical seal. The coolant chamber provided

between the two sealing stages can be filled with coolant by standing the pump

vertically and unplugging “Coolant supply hole”and “Air vent & full level check hole”.

CAUTION : THE SEAL CHAMBER MAY BE UNDER PRESSURE. HOLD A

RAG OVER THE PLUG TO PREVENT SPLATTER.

Pour the specified coolant into the coolant chamber through “Coolant supply hole”

until the coolant flows out of “Air vent & full level check hole”. (See Table 1c)

After the coolant chamber is filled to the specified level, plug the two holes.

Coolant supply hole

Air vent & full level check

hole

*ICS opt.

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