PENTAIR Myers RG-10 Grinder Pump Instruction Manual

: June 9, 2024
: Pentair

Table of Contents

PENTAIR Myers RG-10 Grinder Pump
USAGE
INSPECTING PUMP
GRINDER COMPONENT CLEARANCES
OVERVIEW
TROUBLESHOOTING GUIDE
STANDARD LIMITED WARRANTY
CONTACTS
References
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PENTAIR Myers RG-10 Grinder Pump

PENTAIR-Myers-RG-10-Grinder-Pump-PRODUCT

NOTE: To the installer: Please make sure you provide this manual to the owner of the equipment or to the responsible party who maintains the system.

USAGE

The RG-10 is a submersible wastewater grinder pump designed specifically for residential applications. These pumps are to be used for residential domestic sewage only and are not to be used for pumping commercial or industrial sewage such as from motels, schools, apartments, factories, etc.

CALIFORNIA PROPOSITION 65 WARNING

WARNING: This product and related accessories contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

INSPECTING PUMP

Before making any piping or electrical connections, check the pump for shipping damage or cracks. Using a flat screwdriver placed in the slot on the shaft end, turn the shaft and impellers to be sure they are free, DO NOT TURN IMPELLER WITH FINGERS AS EDGES ARE SHARP.

CAUTION: NEVER WORK ON THE UNIT WITHOUT DISCONNECTING THE ELECTRICAL POWER CORD.

GRINDER COMPONENT CLEARANCES

If the shaft and impellers do not turn freely, the grindingimpeller may be contacting the grinder ring. The diametric clearance should be .005/.00″ (.0025/.004 per side). If the grinding impeller rubs on the grinding ring, loosen the four bolts that hold the volute case in place. With a rubber hammer, tap the volute until the shaft turns freely, retighten the bolts down evenly.

POWER SUPPLY

The RG-10 grinder pump should only be connected to a 230 volt, single phase, 60 Hertz power source. The pump will draw approximately 8.2 amperes at minimum flow and 11.0 amperes at maximum flow rate. Locked rotor current is 35 amperes. The pump must be connected to a grounded power socket. Do NOT cut off the ground pin from the power cord plug.

POWER CORD

A 20 foot power cord is attached to the grinder pump via a quick-disconnect positive sealing socket design. To replace cord simply unscrew (turn counterclockwise) the thermoplastic cord nut from the socket on the pump’s cap. With the nut unscrewed and moved up the cord a few inches, grasp the upper end of the cord end connector and pull and wiggle the connector from the socket. The power cord should be replaced if it has been damaged in any way or the cord jacket has become brittle.

FLOAT CONTROL

The float control has the same type of cord end connector as the power cord. If a replacement control needs installed, the cord tether length between the clamp and the float should be a minimum of 4″ to allow proper operation. The “OFF” and “ON” cycle times can be increased by setting a slightly longer tether length between the clamp and the float.

MOTOR

The RG-10 grinder pump contains a single phase, capacitor start, 3450 RPM motor. Resistance at the motor terminals is 2.0 ohms. Resistance at the end of a 20 foot cord is 2.5 to 3.0 ohms. Overload protection is provided by an on- winding thermal protector which opens upon experiencing higher than normal temperatures. The protector will re-set automatically upon cooling and the motor will re-start.

OIL LEVEL

The motor chamber contains dielectric transformer oil to provide good heat transfer and lubrication of the ball bearings and seal, no other lubrication is required. Oil level may be checked by removing the oil fill plug from the side of the motor housing. The oil level should be just at the bottom of the oil fill hole with the pump setting vertically. Do not over fill with oil. Only dielectric oil obtained from a Myers authorized service center should be used. Tighten the oil plug firmly.

CLEANING THE VOLUTE CASE

Remove the four bolts from the grinder volute case and pull the volute case straight out from the seal plate. Use a plastic hammer, if necessary, to loosen.
Clean the volute case and check for blockage of the discharge channel. Do not remove the impellers.
By turning the impellers clockwise, check that the impellers and motor turn; there will be some drag due to shaft seal friction
Before replacing the volute case, check that the small air vent groove on the upper surface of the volute is free of debris.
Set the case on the seal plate and start the four bolts through the volute and into the plate. Lightly tighten the bolts evenly.
Place a screwdriver in the shaft end slot and turn to be sure that the impellers turn freely. Some drag, due to the seals, will be present, but there should not be any binding spots.
If the impeller rubs, slightly loosed the four bolts and tap the case with a plastic hammer until the impeller does not rub. Then tighten the bolts down evenly.

OVERVIEW

PENTAIR-Myers-RG-10-Grinder-Pump-FIG-1

Ref. No.	Part No.	Description
1	21929A002	Bolt, Eye, 3/8-16
2	24472D001	Cap (After Nov. 1989)
3	05876A125	O-Ring, 6-1/8 x 5-7/8 x 1/8″ (2 Req’d)
4	18475A003	Screw, 1/4-20 x 7/8″ Lg., SST (8 Req’d)
5	24466D000	Housing, Motor
6	24467B000	Motor, 230 V, 1 Ph., 2 Pole
7	22447A000	Seal, Rotary, 5/8″
8	24473C000	Plate, Seal
9	24463D000	Case, Volute with Ring
10	19099A014	Screw, 1/4-20 x 1-1/2″ Lg., SST (4 Req’d)
11	24465B000	Impeller
12	21628B019	Cord, Electric, 20 ft., 230 V.
13	19331A005	Washer, Spring Finger
14	09859A800	Wire, Jumper
15	09822A032	Screw, No. 10 x 3/8″ Lg.
16	22071A001	Clamp, Cable
17	21813B138	Control, Float
18	05022A056	Plug, Pipe, 1/4 NPT (After Nov. 1989)
19	24468A000	Impeller, Grinding

Discharge Elbow

Ref. No.| Part No.| Description
20| 24460B000| Elbow, Discharge
21| 05014A184| Gasket
22| 19099A024| Screw, 1/4-20 x 1-1/4″ Lg.
23| 05030A171| Washer, Flat
24| 05454A023| Washer, Lock
25| 19109A077| Nut, 1/4-20

TROUBLESHOOTING GUIDE

The pump does not run or hum.

See A, B, C, D, E or F.

| A. Line circuit breaker may be off; or fuse may be blown or loose.

B. Water level in sump may be too low. Run in more water.

C. Pump cord plug may not be making contact in the receptacle.

D. If pump is using the series cord plug, the two plugs may not be plugged tight together.

E. Float may be stuck. Be sure float operates freely in basin. Check tether length of switch.

F. If all symptoms check OK, motor winding may be open; take to service center for repair.

G. Check valve may be installed backwards. Arrow on valve points in direction of flow.

H. Discharge shut-off valve, if used, may be closed.

I. Pump may be air locked. Start & stop several times by plugging & unplugging cord. Check vent hole on pump case for plugging.

| J.

K.

L.

M.

N.

O.

P.

| The pump head may be too high. Horizontal distance does not affect pumping, except loss due to friction.

Inlet holes in pump base may be clogged. Remove pump and clean out openings.

Impeller or volute openings may be plugged or partially

plugged. Remove pump & clean. Check tether length of switch.

Float is stuck in up position. Be sure float operates freely in basin.

Pump impeller may be partially clogged causing motor to run slow, resulting in motor overload.

Fuse size or circuit breaker is too small. Must be 15 amps. Defective motor stator. Return to Myers service center.

The pump runs but does not deliver water.

See G, H, I, J, K or L.

The pump runs and pumps out the sump but does not stop.

See M.

Pump runs but delivers only small amount of water.

See I, J, K, L or N.

Fuse blows or circuit breaker trips when pump starts.

See K, L, N, O or P.

Motor runs for short time then stops. Then after short period starts again. Indicates tripping overload caused by symptom shown.

See K, L, N or P.

For any other symptoms contact a Myers authorized service facility.

STANDARD LIMITED WARRANTY

Pentair Myers® warrants its products against defects in material and workmanship for a period of 12 months from the date of shipment from Pentair Myers or 18 months from the manufacturing date, whichever occurs first – provided that such products are used in compliance with the requirements of the Pentair Myers catalog and technical manuals for use in pumping raw sewage, municipal wastewater or similar, abrasive-free, noncorrosive liquids. During the warranty period and subject to the conditions set forth, Pentair Myers, at its discretion, will repair or replace to the original user, the parts that prove defective in materials and workmanship. Pentair Myers reserves the right to change or improve its products or any portions thereof without being obligated to provide such a change or improvement for prior sold and/or shipped units.

Start-up reports and electrical schematics may be required to support warranty claims. Submit at the time of startup through the Pentair Myers website: http://forms.pentairliterature.com/startupform/startupform.asp?type=m. Warranty is effective only if Pentair Myers authorized control panels are used. All seal fail and heat sensing devices must be hooked up, functional and monitored or this warranty will be void. Pentair Myers will cover only the lower seal and labor thereof for all dual seal pumps. Under no circumstance will Pentair Myers be responsible for the cost of field labor, travel expenses, rented equipment, removal/reinstallation costs or freight expenses to and from the factory or an authorized Pentair Myers service facility.

This limited warranty will not apply: (a) to defects or malfunctions resulting from failure to properly install, operate or maintain the unit in accordance with the printed instructions provided; (b) to failures resulting from abuse, accident or negligence; (c) to normal maintenance services and parts used in connection with such service; (d) to units that are not installed in accordance with applicable local codes, ordinances and good trade practices; (e) if the unit is moved from its original installation location; (f) if unit is used for purposes other than for what it is designed and manufactured; (g) to any unit that has been repaired or altered by anyone other than Pentair Myers or an authorized Pentair Myers service provider; (h) to any unit that has been repaired using non factory specified/OEM parts.

Warranty Exclusions: Pentair MYERS MAKES NO EXPRESS OR IMPLIED WARRANTIES THAT EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF. Pentair MYERS SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE. Liability Limitation: IN NO EVENT SHALL Pentair MYERS BE LIABLE OR RESPONSIBLE FOR CONSEQUENTIAL, INCIDENTAL OR SPECIAL DAMAGES RESULTING FROM OR RELATED IN ANY MANNER TO ANY Pentair MYERS PRODUCT OR PARTS THEREOF. PERSONAL INJURY AND/OR PROPERTY DAMAGE MAY RESULT FROM IMPROPER INSTALLATION. Pentair MYERS DISCLAIMS ALL LIABILITY, INCLUDING LIABILITY UNDER THIS WARRANTY, FOR IMPROPER INSTALLATION. Pentair MYERS RECOMMENDS INSTALLATION BY PROFESSIONALS.

Some states do not permit some or all of the above warranty limitations or the exclusion or limitation of incidental or consequential damages and therefore such limitations may not apply to you. No warranties or representations at any time made by any representatives of Pentair Myers shall vary or expand the provision hereof.