© MDM INC.
WWW.MDMINC.COM
Efficiency and Longevity.
PROUDLY MADE
IN THE USA
© MDM INC.
WWW.MDMINC.COM
Efficiency and Longevity.
PROUDLY MADE
IN THE USA
MATERIAL:
GLASS-FILLED POLYPROPYLENE
HARDWARE:
STAINLESS STEEL HARDWARE
OPTIONS:
SALTWATER SERVICE
ACCESORIES:
SWING CHECK VALVES (1.5”, 2”, 3”)
INSTALLATION
Please read carefully. When properly installed the Sequence
®
Primer will provide dependable trouble-free service.
1. Locate pump as near to the water source as possible. A flooded suction configuration is mandatory. This pump is self-priming, however, there must be fluid in the pump
for it to function properly. A vertically installed check valve is recommended for non-flooded suction. (Figure 1)
2. Mount 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 the 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. This pump must not be run dry. We recommend a flooded suction installation. Please read carefully. When properly installed, the Sequence
®
pump will provide
dependable, trouble-free service.
6. Before starting pump, the priming pot must be filled with water.
ELECTRICAL HOOK-UP
1. Check that supply voltages match the motor’s requirements.
2. Check motor wiring and connect, according to instructions on motor, to match supply voltage.
3. 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.
We congratulate you on your choice of the Sequence
®
Primer Pump. It has been carefully designed using the advantages of today’s technology and carefully constructed
to give you the dependability of yesterday. To insure proper performance, we urge you to carefully follow the instructions in this manual. If you have any questions, call
your nearest distributor or MDM for assistance.
PRIMER
SWING CHECK VALVE
FLOODED SUCTION
WARNING: DO NOT RUN DRY.
(FIGURE 1)
BALL VALVE
PUMP END ASSEMBLY
1. Inspect all pump parts (O-ring, O-ring groove, impeller hub ID, motor shaft, etc.) and clean if necessary.
2. If replacing the seal, apply sealant in bracket bore hole and around 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 motor shaft and mount bracket to motor.
5. If replacing the seal, carefully lubricate the boot around 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 impeller onto shaft and install o-ring and screw. If required, remove motor end-cap and use a screwdriver on the back of motor shaft to prevent shaft
rotation while tightening. Replace motor end cap.
9. Place diffuser over impeller and tighten allen bolts used to hold diffuser in place. Note: Be sure diffuser is in an upright position. (The word “top” appears on the
diffuser as an indicator).
10. Seat O-ring on diffuser. Assemble diffuser to bracket with 2 allen screws.
11. Seat O-ring in bracket slot and assemble casing to bracket.
12. Install drain plugs with its O-rings in casing drain holes.
DISASSEMBLY
1. Shut off power to motor before disconnecting any electrical wiring.
2. Close all necessary valves on 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 casing by removing the nuts and bolts. (The casing may be left in-line)
4. Unscrew the two allen bolts and remove diffuser. Diffuser may need to be pried off with a flathead screwdriver.
5. Remove screw and O-ring from front side of impeller. Screw is a left-handed thread and loosens in a clockwise direction.
6. Remove cap covering shaft at back of motor. Unscrew the impeller by twisting counter clockwise while holding the shaft with a large screwdriver to prevent shaft rotation.
7. Remove ceramic piece from impeller (if replacing the seal).
8. Detach bracket from motor.
9. Remove seal from bracket by pressing out from the back (if replacing the seal). Do not dig out from the front.
IMPELLER*
SEAL
DRAIN PLUG
& O-RING
DESCRIPTION
P/N
SEAL
1000.0414
IMPELLER
*DEPENDS ON MODEL
CONSULT FACTORY
O-RING, CASING TO BRACKET
9000.061
CASING
9000.070
DRAIN PLUG
1000.110
O-RING, DRAIN PLUG
805-0112
DIFFUSER
9000.120
O-RING, DIFFUSER
9000.121
LID
9000.779
HARDWARE KIT
9000.502
SLINGER
1000.010V
BRACKET
9000.030
O-RING, LID
9000.777
STRAINER BASKET
9000.778
2” ADAPTOR (2
1/2
” UNION X 2” SOCKET) 9000.070-2
DESCRIPTION
P/N
SEAL
1000.0414
IMPELLER
*DEPENDS ON MODEL
CONSULT FACTORY
O-RING, CASING TO BRACKET
8000.061
CASING
8000.070
DRAIN PLUG
1000.110
O-RING, DRAIN PLUG
805-0112
DIFFUSER
8000.120
O-RING, DIFFUSER
8000.121
LID
1000.771-L
HARDWARE KIT
8000.502
SLINGER
1000.010V
BRACKET
8000.030
O-RING, LID
1000.771-O
STRAINER BASKET
8000.778
DIFFUSER PLATE
8000.141
ADAPTER, UNION X 2” SLIP
400-5081-2B
ALPHA PRIMER
STRAINER
BASKET
HARDWARE
BRACKET
O-RING, CASING TO
BRACKET
O-RING
(DIFFUSER)
DIFFUSER
IMPELLER*
BRACKET
O-RING, CASING TO
BRACKET
SEAL
DRAIN PLUG
& O-RING
DIFFUSER
O-RING
(DIFFUSER)
LID
O-RING, LID
STRAINER
BASKET
HARDWARE
CHAMPION PRIMER, POWER PRIMER
CASING
LID
O-RING, LID
CASING
DIFFUSER PLATE
®
PRIMER
®
PRIMER
SUCTION LIFT
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.
SLINGER
SLINGER
2” ADPATOR
( 2 1/2” UNION X 2” SOCKET)
