For parts or assistance, call Simer Customer Service at
800-468-7867 / 800-546-7867
Installation • Operation
3
Performance
Installation
1. Install tethered switch models in a sump pit with a
minimum diameter of 14” (356mm). Install vertical switch
models in a sump pit with a minimum diameter of 11”
(280mm). Construct the sump pit of tile, concrete, steel or
plastic. Check the local codes for approved materials.
The pump should not be installed on clay, earth or sand
surfaces. Clean the sump pit of small stones and gravel
which could clog the pump. Keep the pump suction
housing clear of debris.
2. Install the pump in the pit so the switch operating
mechanism has maximum possible clearance.
3. Install an in-line check valve to prevent flow backwards
through the pump when the pump shuts off.
4. Install the discharge plumbing.
A. When using rigid pipe, use plastic pipe. Wrap the
discharge pipe thread with PTFE pipe thread sealant tape.
Screw the pipe into the pump discharge port hand tight
+1 – 1-1/2 turns.
NOTICE Do not use ordinary pipe joint compound on
plastic pipe. Pipe joint compound can attack plastics.
NOTICE Thread the discharge pipe into the pump body
carefully to avoid stripping or crossing threads.
B. If a flexible discharge hose is used, make sure the pump
is secured in the sump to prevent movement. Do not use
a flexible discharge pipe in any permanent installation.
Risk of flooding. Can cause personal
injury and/or property damage. Failure to secure pump
may allow pump movement, switch interference and
prevent pump from starting or stopping.
NOTICE The discharge piping should be as short as
possible to reduce pipe friction losses. Discharge pipe
diameter should be equal to or larger than the discharge
size of the pump. Smaller pipe diameters will restrict the
capacity of the pump and reduce pump performance.
C. Secure the discharge line before starting the pump.
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.
If the pump discharge line is exposed to 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 any water trapped in the discharge line to freeze
which could result in damage to pump.
5. Power Supply: This pump is designed for 115 V., 60 Hz.,
operation and requires a minimum 15 amp individual
branch circuit. 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 switch plug.
Risk of electric shock. Can shock, burn or
kill. Pump is supplied with a grounding conductor and
grounding-type attachment plug. To reduce the risk of
electric shock, be certain that it is connected only to a
properly grounded, grounding type receptacle such as
a grounded water pipe or a properly grounded metallic
raceway or ground wire system. Ground terminal on
pump cord plug is provided for your protection. DO NOT
REMOVE!
A ground fault circuit interrupter is recommended for use
with any electrical appliance submerged in water. For
installation of such a circuit, consult a licensed electrician.
6. After the piping and the check valve (if needed) have been
installed, the unit is ready for operation
7. Check the operation by filling the sump with water and
observing pump operation through one complete cycle.
Risk of flooding. Can cause personal injury
and/or property damage. Failure to make this operational
check may lead to flooding and premature failure.
Operation
Risk of electric shock. Can shock, burn or kill.
Do not handle a pump or pump motor with wet hands or
when standing on wet or damp surface, or in water.
1. Keep the pump inlet screen clear.
2. The shaft seal depends on water for lubrication. Do not
operate the pump unless it is submerged in water as the
seal may be damaged if the pump is allowed to run dry.
3. 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 of the power before any
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 for the cause of
the difficulty. Low voltage, long extension cords, a clogged
impeller, very low head or lift, etc., could cause cycling.
Refer to the “Troubleshooting Chart”.
Individual
Switch
Setting
Model
Max.
Branch Circuit
Cord
in inches (mm)
Number
HP
Load Amps
Required (Amps)
Length
On
Off
2905-04
1/4
6.0
15
8’
10” (254)
3” (76)
2955-04 1/3 10.0 15
8’ 11” (279)
4” (102)
2957-04
1/3
10.0
15
8’
7-1/2” (191)
2-1/2” (64)
Motor, Switch, and Cord Specifications
GPM (LPM) AT TOTAL FEET (m)
5
10
15
20
25
Model (1.5m) (3m) (4.6m) (6.1m) (7.6m)
CAPACITY GALLONS(L)/HOUR
2905-04
1,170 1,020 810 510
0
(4,429) (3,840) (3,066) (1,931)
(0)
2955-04 1,740 1,620 1,260 720
60
2957-04
(6,600) (6,120) (4,740) (2,700)
(240)
