Xylem IM127 R04 Sump Pumps - Manual (Page 4)

4
WARNING
Hazardous
voltage
WARNING
WARNING
Check the strain relief nut on power cable strain assem-
blies. Power cables should be torqued to 75 in. lbs. for
#16 cables and 80 in. lbs. for all other cable assemblies.
Warranty does not cover damage caused by connecting
pumps and controls to an incorrect power source (volt-
age/phase supply).
Record the model numbers and serial numbers from the
pumps and control panel on the front of this instruction
manual for future reference. Give it to the owner or affix
it to the control panel when finished with the installation.
LIFTING OF PUMP
DO NOT LIFT, CARRY OR HANG
PUMP BY THE ELECTRICAL
CABLES. DAMAGE TO THE
ELECTRICAL CABLES CAN CAUSE
SHOCK, BURNS OR DEATH.
Lift the pump with an adequately sized chain or cable at-
tached to the lifting eye bolt. DO NOT damage electrical
and sensor cables while raising and lowering unit.
OPTIONAL GUIDE RAIL
OR LIFT-OUT SYSTEM
In many effluent and sewage basins or lift stations it is
advisable to install the pump on a guide rail system or on
a lift-out adapter to facilitate installation and removal for
inspection and/or service. Most codes do not allow per-
sonnel to enter a wetwell without the correct protective
equipment and training. Guide rails are designed to allow
easy removal of the pump without the need for entry
into the wetwell or need to disturb piping. The guide rail
or lift-out adapter should locate the pump opposite the
influent opening preventing stagnate areas where solids
can settle. The basin or pit must be capable of supporting
the weight of the pump and guide rail. The pit floor must
be flat.
NOTICE: FOLLOW THE INSTRUCTIONS THAT ARE
PROVIDED WITH THE GUIDE RAIL ASSEMBLY.
PIPING
Discharge piping should be no smaller than the pump
discharge diameter and kept as short as possible, avoiding
unnecessary fittings to minimize friction losses.
Install an adequately sized check valve matched to the
solids handling capability of the pump to prevent fluid
backflow. Backflow can allow the pump to “turbine” back-
wards and may cause premature seal and/or bearing wear.
If the pump is turning backwards when it is called on to
start the increased torque may cause damage to the pump
motor and/or motor shaft and some single-phase pumps
may actually run backwards.
Install an adequately sized gate valve AFTER the check
valve for pump, plumbing and check valve maintenance.
Important – Before pump installation. If pumping water,
drill a 1 ⁄
8
” (3.2mm) relief hole. If pumping waste water
containing solids, drill a 3 ⁄
16
” (4.8mm) relief hole in the
discharge pipe. It should be located within the wetwell,
2” (51mm) above the pump discharge but below the check
valve. The relief hole allows any air to escape from the
casing. Allowing liquid into the casing will insure that the
pump can start when the liquid level rises. Unless a relief
hole is provided, a bottom intake pump could “air lock”
and will not pump water even though the impeller turns.
All piping must be adequately supported, so as not to
impart any piping strain or loads on the pump.
The pit access cover must be of sufficient size to allow for
inspection, maintenance and crane or hoist service.
WIRING AND GROUNDING
Important notice: Read Safety Instructions before pro-
ceeding with any wiring.
Use only stranded copper wire to pump/motor and
ground. The ground wire must be at least as large
as the power supply wires. Wires should be color
coded for ease of maintenance and troubleshooting.
Install wire and ground according to the National
Electrical Code (NEC), or the Canadian Electrical
Code, as well as all local, state and provincial codes.
Install an all leg disconnect switch where required
by code.
Disconnect and lockout electrical power before
performing any service or installation.
The electrical supply voltage and phase must match
all equipment requirements. Incorrect voltage or
phase can cause fire, motor and control damage,
and voids the warranty.
All splices must be waterproof. If using splice kits
follow manufacturer’s instructions.
Select the correct type and NEMA grade
junction box for the application and loca-
tion. The junction box must insure dry,
safe wiring connections.
Seal all controls from gases present which
may damage electrical components.
FAILURE TO PERMANENTLY
GROUND THE PUMP, MOTOR AND
CONTROLS BEFORE CONNECTING
TO POWER CAN CAUSE SHOCK,
BURNS OR DEATH.
SELECTING AND WIRING
PUMP CONTROL PANELS AND SWITCHES
FLOAT SWITCH TYPES
There are three types of float switches typically used
on single phase pumps; single action, vertical and wide
angle.
Single action control switches can only be connected
through a control panel. Connecting them directly to a
pump will cause rapid cycling and may burn up the mo-
tor, and/or the motor start switch and/or the float switch.
If using single action switches with a control panel please
see the Float Switch and Panel Section.
Vertical mechanical float switches with piggyback plugs
are available for single phase pumps. They are an ideal
choice where there is limited space for a switch. They
require less room than a wide angle switch because they
travel in a vertical direction. Typical model numbers start
with A2H…
WARNING
Hazardous voltage
can shock, burn or
cause death.