Sta-Rite DH2E3-50 Installation Manual

OWNER’S MANUAL

INSTALLATION AND OPERATING INSTRUCTIONS

REPAIR PARTS LIST

60 CYCLE

SELF-PRIMING CENTRIFUGAL PUMPS

“D” SERIES

MODELS

1 HP 1-1/2 HP 2 HP 2-1/2 HP

DMG-41L DMMG-42L

MEDIUM HEAD DMG3-41 DMMG3-42

DMM2G-42

DHE-50L DHF-51L DHG-52L DHHG-53L

HIGH HEAD DHE3-50 DHF3-51 DHG3-52 DHHG3-53

DH2E3-50

STA-RITE INDUSTRIES, DELAVAN, WISCONSIN 53115

LIMITED WARRANTY

Sta-Rite Industries warrants to the original consumer of the products listed below, that they will be free from defects in material and workmanship for the Warranty Period from the date of original installation or manufacture as noted.

Product Warranty Period

Water Systems Products – jet pumps,

whichever occurs first:

small centrifugal pumps, submersible pumps 1 year from date of original installation, or and related accessories 2 years from date of manufacture

Hydro-Flow Filters 1 year from date of purchase Signature 2000 Fibrewound Tanks 5 years from date of original installa ion Pro-Source Steel Pressure Tanks 5 years from date of original installation Pro-Source Epoxy-Line Tanks 3 years from date of original installation Sump/Sewage/Effluent Products 1 year from date of original installation, or

2 years from date of manufacture

Our warranty will not apply to any product hat has been subject to negligence, misapplication, improper installation or maintenance. In the event a three phase submersible motor is operated with single phase power through a phase converter, or if three-leg ambient compensated, extra-quick trip overload relays of recommended size are not used, our warranty is void.

Buyer’s only remedy and Sta-Rite Industries’ only duty is to repair or replace defective products (at Sta-Rite Industries’ choice). Buyer agrees to pay all labor and shipping charges associated with this warranty and to request warranty service through the installing dealer as soon as a problem is discovered. If warranty service is requested more han 30 days after he Warranty Period has ended, it will not be honored.

STA-RITE INDUSTRIES SHALL NOT BE LIABLE FOR ANY CONSEQUENTIAL, INCIDENTAL, OR CONTINGENT DAMAGES WHATSOEVER. THE FOREGOING WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER EXPRESS WARRANTIES. IMPLIED WARRANTIES,

INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, SHALL NOT EXTEND BEYOND THE WARRANTY PERIOD PROVIDED HEREIN.

Certain states do not permit he exclusion or limitation of incidental or consequential damages or the placing of limitations on the duration of an implied warranty, therefore, the limitations or exclusions herein may not apply. This warranty sets forth specific legal rights and obligations, however, additional rights may exist, which may vary from state to state.

Supersedes all previous publications.

Sta-Rite Industries, Inc. 293 Wright St., Delavan, WI 53115

Support suction pipe as required

Support discharge pipe as required

As close

as possible

4 x "D"

minimum

Pipe diameter "D" at least as large as pump suction connection

Important:

All connections must be

air tight

Solid, level base

Priming Plug

Gate Valve

Union

Discharge to service

Recommended pump suction and discharge connections

Not

recommended pump suction

and discharge connections

Elbow immediately in front of pump suction.

High

lift

Pipe diameter "D" insufficient size

Pipe submerged less than 4 x "D" will cause vortexing

Long suction

run

Valve

Unsupported

Pipe

Misaligned pipe causes

air leaks;

high spots along the suction line result in

air pockets.

Offset suction flange adapter keeps suction water level above impeller eye to aid priming.

Use of excess fittings means potential

air leaks

Straight run, short as possible but at least 6 times pipe diameter ("D"); slope is

down

going away

from pump.

1239 0894

Some models have top discharge; these require a priming tee.

On the discharge

avoid:

Quick closing valves. Small I.D. pipe. Numerous fittings. Misalignment. Sharp turns in piping run.

Figure 1

Figure 2

LOCATION OF UNIT

Locate the pump as near the liquid source as possible, using a short, direct suction pipe. Keep the static suction lift (vertical distance between the center line of the pump and the liquid level) to a minimum. Mount the pump on a solid, level foundation, which provides a rigid and vibration-free support. It should be located where the unit is readily accessible for service and maintenance. The pump should be protected against flooding and excessive moisture. Do not allow pump or any system component to freeze.

PIPING

Both suction and discharge piping should be independently supported at a point near the pump to avoid strains being placed on the pump. Start all piping at pump to avoid strains left by a gap at last connection.

SUCTION PIPING

The suction pipe must be kept free of leaks. The suction pipe must have a gradual slope upward to the pump. Avoid any fittings which may cause an air trap. On units that have a suction fitting, a check valve is a built-in feature and no foot valve is required.

DISCHARGE PIPING

A gate valve and union should be installed in the discharge line. For removal of the pump for service, close the gate valve, and disconnect at union.

Never run pump dry. Running pump without water may cause pump to overheat, damaging seal and possibly causing burns to persons handling pump. Fill pump with water before starting.

Never run pump against closed discharge. To do so can boil water inside pump, caus-

ing hazardous pressure in unit, risk of explosion and possibly scalding persons handling pump.

PRIMING THE PUMP

A tee installed in the discharge opening of the pump, and provided with a priming plug at the top position, will enable you to fill the pump with liquid. Once filled and the priming plug replaced, the pump will prime. The pump should prime itself time after time, as long as the built-in check valve functions.

TABLE I - RECOMMENDED FUSING AND WIRING DATA - 60 CYCLE MOTORS

DIAMETER IN FEET FROM MOTOR TO METER

BRANCH 0’ 101’ 201’ 301’ 401’

FUSE* TO TO TO TO TO

MOTOR MAX. LOAD RATING 100’ 200’ 300’ 400’ 500’

HP AMPERES AMPS

115/230 VOLT SINGLE PHASE WIRE SIZE

1 15.3/7.6 20/15 12/14 8/14 6/14 6/12 4/10

1-1/2 19.2/9.6 25/15 10/14 8/14 6/12 4/10 4/10

2 24.0/12.0 30/15 10/14 6/14 6/12 4/10 4/10

2-1/2 26.0/12.0 30/15 10/14 16/14 4/12 4/10 4/10

230/460 VOLT THREE PHASE WIRE SIZE

1 3.6/1.8 15/15 14/14 14/14 14/14 14/14 14/14

1-1/2 4.7/2.35 15/15 14/14 14/14 14/14 14/14 14/14

2 6.8/3.4 15/15 14/14 14/14 14/14 12/14 12/14

2-1/2 8.5/4.25 15/15 14/14 14/14 14/14 12/14 10/14

200/400 VOLT THREE PHASE WIRE SIZE

1 3.8/1.9 15/15 14/14 14/14 14/14 14/14 14/14

*A Fusetron is recommended instead of a fuse in any motor circuit.

IMPORTANT: BE SURE lead wire opening on end of motor is fully sealed when conduit or a pressure switch is not used. Failure to seal it properly will allow dirt, rain, bugs, etc. to enter back compartment of motor through conduit opening and cause switch malfunction.

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