SEQUENCE Alpha Primer Pump Installation Guide

Alpha Primer Pump
Installation Guide

Alpha Primer Pump

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MODEL: __
SERIAL NUMBER: ___
DATE PURCHASED: __
COMPLETE AND MAIL YOUR WARRANTY REGISTRATION CARD INCLUDED WITH THIS PRODUCT OR FILE ONLINE AT: WWW.MDMINC.COM/PUMP-REGISTRATION

TYPE: STRAIGHT CENTRIFUGAL
MOTOR: NEMA 56Y
HORSEPOWER: 1/3, 1/2 (1750 RPM), 2
INLET: 2” FNPT WITH 2” SLIP ADAPTERS
DISCHARGE: 2” & 2 1/2” SLIP ADAPTERS
MATERIAL: GLASS-FILLED POLYPROPYLENE
HARDWARE: STAINLESS STEEL
OPTIONS: SALTWATER SERVICE
ACCESSORIES: SWING CHECK VALVES (1.5”, 2”, 3”)
*MOTORS ARE SUBJECT TO CHANGE DUE TO AVAILABILITY OR SPECIFICATION REQUIREMENTS.

Model| 3200PRM15| 5000PRM18| 6800PRM19| 7800PRM24| 6000PRM60 (HIGH-SPEED)
---|---|---|---|---|---
INLET| 2”| 2”| 2”| 2”| 2”
DISCHARGE| 2”| 2”| 2”| 2”| 2”
MAX FLOW (GPH)| 3200| 5000| 6800| 7800| 6000
MAX HEAD (FEET)| 15| 18| 19’| 24’| 60’
MAX POWER (WATTS)| 228| 310| 369| 504| 1418
MAX CURRENT (AMPS)| 2.68 @120V| 3.27 @120V| 3.93 @115V| 5.02 @115V| 8.74 @230V
VOLTS| 120| 120| 115/230| 115/230| 230
MOTOR HP| 1/2, 1/3| 1/2, 1/3| 1/2, 1/3| 1/2, 1/3| 2
MOTOR TYPE| 56Y| 56Y| 56Y| 56Y| 56Y
MOTOR ENCLOSURE| TEFC| TEFC| TEFC| TEFC| ODP

Read this manual completely before you install or operate your new pump. This is an external “out-of-pond” pump.
It is not submersible. Do not allow this pump to become submerged. Never run dry.

We congratulate you on your choice of the Sequence® Alpha Primer. It has been carefully designed using the advantages of today’s technology and carefully constructed to give you the dependability of yesterday. To ensure proper performance, we urge you to carefully follow the instructions in this manual. If you have any questions, please call your supplier for assistance or visit www.mdminc.com/support.

INSTALLATION

Please read carefully. When properly installed the Sequence® Alpha Primer will provide dependable trouble-free service.

1. Locate the pump as near the source to be pumped as possible. A flooded suction situation is preferred. This pump is self-priming, however, there must be fluid in the pump for it to function properly. A check valve is recommended for non-flooded suction (Figure 1).
2. Mount the motor base to a secure, immobile foundation.
3. Use only plastic fittings on both the intake and discharge ports. Seal pipe connections with Teflon ® paste. These fittings should be self-supported and in neutral alignment with each port (i.e. Fittings must not be forced into alignment which may cause premature line failure or damage to the pump volute).
4. Never restrict intake. Keep both input and discharge lines as free of elbows and valves as possible. Always use pipe of adequate diameter. This will reduce friction losses and maximize output.
5. Before starting the pump, the priming pot must be filled with water. WARNING: DO NOT RUN DRY

WARNING: ALWAYS SHUT OFF ELECTRICAL POWER BEFORE INSTALLATION AND / OR SERVICING THIS PUMP.
ALL ELECTRICAL WIRING SHOULD MEET STATE AND LOCAL ORDINANCES. IMPROPER WIRING MAY NOT ONLY BE A SAFETY HAZARD BUT MAY
PERMANENTLY DAMAGE THE MOTOR AND/OR PUMP. 230V 50HZ MOTORS ARE AVAILABLE. CONTACT YOUR SUPPLIER FOR INFORMATION.

ELECTRICAL HOOK-UP

1. Check that the supply voltage matches the motor’s requirements.
2. Check motor wiring and connect, according to instructions on the motor, to match the supply voltage.
3. The power cord should be protected by conduit or by cable and be of proper gauge. It should be no longer than necessary.
4. Power should be drawn directly from a box with circuit breaker protection or with a fused disconnect switch.

PUMP END ASSEMBLY

1. Inspect all pump parts (O-ring, O-ring groove, impeller hub ID, motor shaft, etc.) and clean them if necessary.

2. If replacing the seal, apply sealant in the bracket borehole and around the seal case according to sealant instructions. We recommend using Gasgacinch®. Silicone sealant can also be used.

3. Press seal into bracket while taking care not to damage seal face.

4. Place slinger (rubber washer) over the motor shaft and mount bracket to motor.

5. If replacing the seal, carefully lubricate the boot around the ceramic piece and press it into the impeller hub making certain that the ceramic is in evenly – the sealing surface should be parallel with the impeller hub.

6. Apply clean water to the carbon-graphite and seal seat sealing surfaces. Do not use silicon lubricants or grease.

7. Mount bracket to motor face.

8. Thread the impeller onto the shaft and install the o-ring and screw. If required, remove the motor end-cap and use a screwdriver on the back of the motor shaft to prevent shaft rotation while tightening. Replace motor end cap.

9. Place the diffuser over the impeller and tighten the Allen bolts used to hold the diffuser in place.
   Note: Be sure the diffuser is in an upright position. (The word “top” appears on the diffuser as an indicator).

10. Seat the O-ring on the diffuser. Assemble diffuser to bracket with 2 Allen screws.

11. Seat the O-ring in the bracket slot and assemble the casing to the bracket.

12. Install drain plugs with their O-rings in casing drain holes.

DISASSEMBLY

1. Shut off power to the motor before disconnecting any electrical wiring.
2. Close all necessary valves on the inlet and discharge lines and drain the pump by removing both drain plugs. The water will drain faster if you loosen the lid.
3. Disassemble bracket-motor assembly from the casing by removing the nuts and bolts. (The casing may be left in-line).
4. Unscrew the two Allen bolts and remove the diffuser. The diffuser may need to be pried off with a flathead screwdriver.
5. Remove the screw and O-ring from the front side of the impeller. The screw is a left-handed thread and loosens in a clockwise direction.
6. Remove the cap covering the shaft at the back of the motor. Unscrew the impeller by twisting counterclockwise while holding the shaft with a large screwdriver to prevent shaft rotation.
7. Remove the ceramic piece from the impeller (if replacing the seal).
8. Detach the bracket from the motor.
9. Remove the seal from the bracket by pressing out from the back (if replacing the seal). Do not dig out from the front.

MAINTENANCE

Lubrication
Motor – Permanently Lubricated ball bearings – no service required.
Rotary Seal – Requires no lubrication after assembly.
WARNING: EYE PROTECTION IS STRONGLY RECOMMENDED
*The pump must be drained before servicing or if stored below freezing temperatures. Periodic replacement of seals may be required due to normal carbon wear.

suction piping.
Install check valve.
Insufficient Power| Verify power supply and connection from panel to pump.
Verify proper voltage.  Some models are dual voltage (115/230).
Flow Restriction| Ensure valves are open.
Ensure plumbing is clear, including suction strainers, check valves, etc.
Verify check valve orientation and direction of permitted flow.
Clean out leaves or other debris from the basket strainer (if applicable).
Air leak| Fix air leaks at fittings, connections, strainer baskets, etc.  This typically occurs on the intake side.
System Incompatibility| Verify hydraulic compatibility: i.e. pump & pipe are sized for the system.
Low Flow| Air leak| Fix air leaks at fittings, connections, strainer baskets, etc.  This typically occurs on the intake side.
System Incompatibility| Verify hydraulic compatibility: i.e. pump & pipe are sized for the system.
Insufficient Power| Verify power supply and connection from panel to pump.
Verify proper voltage.  Some models are dual voltage (115/230).
Flow Restriction| Ensure valves are open.
Ensure plumbing is clear, including suction strainers, check valves, etc.
Clean out leaves or other debris from the basket strainer (if applicable).
Insufficient Prime| Prime system with water and purge all air from suction piping.
Cavitation| Verify airtight plumbing on the suction plumbing, especially fittings.
Clean out leaves or other debris from the basket strainer (if applicable).
Increase pipe size where possible.
Decrease suction pipe length, reduce the number of elbows, etc.
Verify hydraulic compatibility: i.e. pump and pipe are sized for the system.
Sporadic Operation| Insufficient Power| Verify power supply and connection from panel to pump.
Verify proper voltage.  Some models are dual voltage (115/230).
Poor Ventilation| Ensure adequate airflow over the motor to prevent overheating.
Excessive Noise| Cavitation| Verify airtight plumbing on the suction plumbing, especially fittings.
Clean out leaves or other debris from the basket strainer (if applicable).
Increase pipe size where possible.
Decrease suction pipe length, reduce the number of elbows, etc.
Verify hydraulic compatibility: i.e. pump and pipe are sized for the system.
Insufficient Power| Verify power supply and connection from panel to pump.
Verify proper voltage.  Some models are dual voltage (115/230).
Flow Restriction| Ensure valves are open.
Ensure plumbing is clear, including suction strainers, check valves, etc.
Verify check valve orientation and direction of permitted flow.

Gasgacinch® is a registered trademark of Porter Manufacturing.
Teflon® is a registered trademark of the Chemours Corporation.
Sequence® is a registered trademark of MDM Incorporated.
Sequence Alpha Primer Installation Manual 2021. in. Adobe Indesign CC. Updated 05/28/21.

© MDM INCORPORATED
3345 N. Cascade Ave
Colorado Springs, CO 80907
Phone 719-634-8202
Fax 866-425-1346
www.mdminc.com
sales@mdminc.com
PROUDLY MADE
IN THE USA

Documents / Resources

| SEQUENCE Alpha Primer Pump [pdf] Installation Guide
Alpha Primer Pump, Alpha Primer, Pump
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References

• Centrifugal Pump Supply & Manufacturer - MDM, Inc.
• Pump Warranty Registration - MDM, Inc.
• Support and FAQ's - MDM, Inc.

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