MYERS MUSP125 Notice D'utilisation page 4

Installation / Maintenance
pump into the back of the switch's plug.
Adjusting The Flow
The drain pump can pump up to 27 gallons per minute
(GPM). Normal sink drains allow only 5 to 6 GPM to
flow. Adjust the discharge shut-off/flow balancing valve as
follows so that the pump does not cycle on and off when
the faucets are on full.
1. Run water into the sink. The pump will start when it
detects water.
2. Check for leaks. If leaks are found, unplug the pump
power cord and fix the leaks before proceeding.
3. Put a stopper in the drain and allow the sink to fill up
a few inches.
4. Open the discharge shut-off valve, open the faucets,
and remove the stopper to drain the sink.
5. The pump will start. Adjust the discharge shut-off/flow
balancing valve until the pump runs continuously
while the faucets are running and the sink is draining.
If the water level rises with the pump on, slightly open
the discharge valve to balance the flow. If it drops,
slightly close the discharge valve.
Washing Machine Use
Washing machines usually discharge more water than the
faucets do, and it is normal for the water level to rise in
the sink while the pump is discharging. Do not adjust the
discharge valve to match the flow when the washing
machine discharges into it, unless the sink is ONLY used
Laundry Laundry
Screen Screen
1-1/2" PVC † 1-1/2" PVC †
Pump Pump
† For easier removal for servicing or cleaning, † For easier removal for servicing or cleaning,
install a 1-1/2" solvent union in the drop pipe. install a 1-1/2" solvent union in the drop pipe.
Figure 3: Pump Removal.
Discharge Pipe Discharge Pipe
Sink Sink
Check Valve Check Valve
Shut-Off/Flow- Shut-Off/Flow-
Balancing Valve Balancing Valve
1-1/4" Union Half 1-1/4" Union Half
1-1/4" Union 1-1/4" Union
Half Half
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for washing machine discharge.
NOTICE: Washing machine discharge water contains fiber
and lint. Unfiltered washing machine discharge could
plug the pump and require pump disassembly for clean-
ing. To avoid this, install a lint trap or bag type filter in the
washing machine discharge line and clean it out regularly.
MAINTENANCE
This pump requires very little maintenance and should
provide a long service life. Problems are rare; when the
pump flow drops off, the most likely cause is something
solid going down the drain and jamming the impeller.
To clear a jammed impeller:
1. Unplug the Pump.
2. Close the discharge shutoff valve.
3. Bail out the sink as much as possible.
4. Disconnect the union, unscrew the pump from the
sink tail piece, lower the pump to the floor, and slide it
out from under the sink (see Figure 3).
5. Remove the six housing screws (see Figure 4).
6. Clean out the pump. Make sure that the pump dis-
charge is clear. If necessary, replace the impeller.
7. Install the new gasket (included with impeller).
Reassemble the pump.
8. Raise the pump back into position, thread it back onto
the sink tail piece, and reconnect the union.
9. Plug in the pump. Run water in the sink until the
pump has run at least one complete cycle to make
sure the pump is operating correctly and there are no
Figure 4: Remove 6 housing screws to clean out pump.
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