Pentair ME40T20-R User manual

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INSTALLATION AND
OPERATION MANUAL
MY994_R (08-20-20) ©2020 Pentair. All Rights Reserved.
MYERS
SUBMERSIBLE EFFLUENT PUMP
ME40T20-R
ENGLISH: 1-8 FRANCAIS: 9-16 ESPANOL: 17-24

Safety Instructions........................................................................................................................................................................... 3
Installation................ ...................................................................................................................................................................... 4
Operation......................................................................................................................................................................................... 5
Parts List......................................................................................................................................................................................... 6
Troubleshooting............................................................................................................................................................................... 7
Warranty.......................................................................................................................................................................................... 8
TABLE OF CONTENTS

3
MY994_R (08-20-20)
SAFETY INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS: This manual contains important
instructions that should be followed during installation,
operation, and maintenance of the product. Carefully read and
follow all safety instructions in this manual.
indicates a hazard which, if not avoided, will result
in death or serious injury.
indicates a hazard which, if not avoided, can result
in death or serious injury.
indicates a hazard which, if not avoided, can or
may result in minor or moderate injury.
NOTE addresses practices not related to personal injury.
Hazardous Voltage. Can cause severe or fatal
electrical shock. Do not plug in or unplug while standing on a
wet floor or in water. Failure to follow this warning can result in
fatal electrical shock.
Risk of flooding. Do not run pump dry. To do so
will damage seals and can cause leaking and property damage.
Risk of electrical shock. Do not lift the pump by
the electrical cord; lift pump only by the discharge pipe, lifting
ring or handle on the pump. Lifting by the cord can damage the
cord.
CALIFORNIA PROPOSITION 65 WARNING
This product and related accessories contain
chemicals known to the State of California to cause cancer,
birth defects or other reproductive harm.
 Know the pump application, limitations, and potential
hazards.
 Disconnect power before servicing.
 Drain all water from system before servicing.
 Secure discharge line before starting pump. An unsecured
discharge line will whip, possibly causing personal injury
and/or property damage.
 Check hoses for weak or worn condition before each use,
making certain that all connections are secure.
 Periodically inspect basin/tank and system components.
Keep free of debris and foreign objects. Perform routine
maintenance as required.
 Provide means of pressure relief for pumps whose discharge
line can be shut-off or obstructed. Release all pressure
within system before servicing any component.
 Do not use in water with fish present. If any oil leaks out
of the motor it can kill fish. This unit is not designed as a
waterfall or fountain pump, or for applications involving salt
water or brine! Use with waterfalls, fountains, salt water or
brine will void warranty.
 Personal Safety:
1. Wear safety glasses at all times when working with
pumps.
2. Keep work area clean, uncluttered and properly
lighted.
3. Keep visitors at a safe distance from work area.
 Follow local and/or national plumbing and electrical codes
when installing the system. A ground fault circuit interrupter
(GFCI) is recommended for use on any electrical appliance
submerged in water.
 All wiring should be performed by a qualified electrician.
 This equipment is only for use on 115 volt
(single phase) and is equipped with an approved
3-conductor cord and 3-prong, grounding-type plug.
 Where a 2-prong wall receptacle is encountered, it must
be replaced with properly grounded 3-prong receptacle
installed in accordance with codes and ordinances that
apply.
 Make certain power source conforms to requirements of
your equipment.
 Protect electrical cord from sharp objects, hot surfaces,
oil, and chemicals. Avoid kinking cord. Replace or repair
damaged or worn cords immediately.
 Do not touch an operating motor. Modern motors can
operate at high temperatures.
 Pump is permanently lubricated at the factory. Do not try to
lubricate it!

4MY994_R (08-20-20)
DESCRIPTION
Submersible Effluent Pumps are designed for home basins. For
use in effluent applications or grey water and can handle 1/2"
solids or less". The unit is equipped with a 3-prong grounding-
type power cord. The shaded-pole motor is oil filled and sealed
for cooler running. Upper sleeve/lower ballbearing on the
motor shaft never need lubrication. Automatic reset thermal
protection provided.
SPECIFICATIONS
Power supply required..............................................115V, 60 HZ.
Motor Duty................................................................Continuous
Motor HP..............................................................................4/10
Liquid Temp. Range.................................32°F to 130°F (0°-54°C)
Individual Branch Circuit Required.................................15 Amps
Cord Length.......................................................................20 ft
Discharge Adapter......................................................1-1/2” NPT
PERFORMANCE
INSTALLATION
1. Install the pump in a effluent pit with a minimum diameter
of 14” (356mm). The effluent depth should be 15” minimum
(381mm). Construct the effluent pit of tile, concrete, steel
or plastic. The pump should not be installed on clay, earth
or sand surfaces. Check the local codes for approved
materials.
2. Clean the effluent pit of small stones and gravel which could
clog the pump. Keep the pump inlet screen clear.
3. Install the pump in the pit so that the switch operating
mechanism has maximum possible clearance.
4. Install the discharge plumbing. When using rigid pipe,
use plastic pipe. Wrap the threads with PTFE pipe thread
sealant tape. Screw the pipe into the pump hand tight +1 –
1-1/2 turns.
5. Do not use ordinary pipe joint compound on plastic pipe.
Pipe joint compound can attack plastics and damage the
pump.
6. Risk of flooding. If a flexible discharge hose is
used, make sure the pump is secure in the basib/tank to
prevent movement. Failure to secure the pump may allow
pump movement, switch interference and prevent the
pump from starting or stopping.
7. To reduce motor noise and vibrations, a short length of
rubber hose (e.g. radiator hose) can be connected into the
discharge line near the pump using suitable clamps.
8. Install an in-line check valve to prevent backward flow
through the pump when the pump shuts off.
9. Power Supply: The pump is designed for 115 V., 60 Hz.,
operation and requires a minimum 15 amp individual branch
circuit.
10. Both the pump and switch are supplied with 3-wire cord
sets with grounding-type plugs. The switch plug is inserted
directly into the outlet and the pump plug inserts into the
opposite end of the switch plug.
11. Hazardous Voltage. Can cause severe or
fatal electrical shock. The pump should always be
electrically grounded to a suitable electrical ground such as
a grounded water pipe or a properly grounded metallic
raceway, or ground wire system. Do not modify the cord or
plug or cut off the round ground pin.
12. If the pump discharge line is exposed to an outside sub-
freezing atmosphere, the portion of the line exposed must
be installed so any water remaining in the pipe will drain to
the outfall by gravity. Failure to do this can cause the water
trapped in the discharge to freeze which could result in
damage to the pump.
13. After the piping and check valve have been installed, the
unit is ready for operation.
14. Check the operation by filling the basin/tank with water and
observing pump operation through one complete cycle.
Risk of Flooding. Failure to make this
operational check may lead to improper operation,
premature failure, and flooding.
OVERVIEW
0'
(0m)
5'
(1.5m)
10'
(3m)
15'
(4.6M)
20'
(6.1M)
25'
(7.62M)
30'
(9.14M)
NO FLOW AT
HEIGHT SHOWN
BELOW IN FEET
(METERS)
4020
(15217) 3720 (14082) 3200 (12113) 2820 (10675) 2280 (8631) 1680 (6359) 600 (2271) 31 (9.4 )

5
MY994_R (08-20-20)
OPERATION
 Risk of electrical shock. Can burn or cause
death. Do not handle a pump or pump motor with wet hands
or when standing on a wet or damp surface, or in water.
 Disconnect power from unit before attempting to check
why unit has stopped operating.
 Risk of fire and explosion. Can cause severe
injury, property damage or death. Do not use in explosive
atmospheres. Pump water only with this pump.
 The shaft seal depends on water for lubrication and cooling.
Do not operate the pump unless it is submerged in water as
the seal may be damaged if allowed to run dry.
 The motor is equipped with an automatic reset thermal
protector. If the temperature in the motor should rise
unduly, the switch will cut off all power before damage
can be done to the motor. When the motor has cooled
sufficiently, the switch will reset automatically and restart
the motor.
If the protector trips repeatedly, the pump should be
removed and checked as to cause of difficulty. Low voltage,
long extension cords, clogged impeller, very low head or lift,
etc., could cause cycling.
 The pump will not remove all water. If a manually operated
pump is operating and suddenly no water comes out of the
discharge hose, shut the unit off immediately. The water
level is probably very low and the unit has broken prime.
 Do not change the tether length of the float switch (Fig 1.).
The float must be able to swing through its complete arc
without interference.
AIRLOCKS
When a pump airlocks, it runs but does not move any water. An
airlock will cause the pump to overheat and fail. This pump has
a built in anti-airlock hole. Leakage from the anti-airlock hole is
normal.
If you suspect an airlock, unplug the pump, clean out the anti-
airlock hole with a paper clip or a piece of wire, and restart the
pump.
OPERATION
3-1/2"
(89 mm)
3649 0200
Figure 1 – Float Switch Tether Length