Pentair MYERS Serie Manual De Uso página 3

GENERAL DESCRIPTION AND USES
The WHR and WHRH Series are solids handling pumps that
can be used to pump RAW SEWAGE for COMMERCIAL and
DOMESTIC use, but are not intended to handle large rags,
mop heads, or strings. All pumps can be used for normal
sump duty where extra capacity is required. The WHRE
Series is for pumping sump water and EFFLUENT from
septic tanks only. DO NOT USE FOR RAW SEWAGE.
RECESSED IMPELLERS
All of the pumps are of the recessed impeller type that
provides a clear volute passage for solids as no solids pass
through the impeller. All of the pumps listed can be used to
pump septic tank EFFLUENT or GROUND sewage as used
in some pressure sewer systems.
DESIGN OF PRESSURE SEWER SYSTEMS
MYERS has available complete computer SOFTWARE for
designing PRESSURE SEWER SYSTEMS. This gives pipe
sizes to use and gives exact flow from any pump or group
of pumps in the system when operating simultaneously. This
design DISK for IBM or COMPATIBLE computers is available
to engineers on request.
DOUBLE SEAL PUMPS
All double seal models have two seals with an oil chamber
between the seals so that seal faces of both lower and upper
seals are oil lubricated for longer life and greater protection
against water leaking into the motor windings. These double
seal units are made with and without a seal leak probe. The
leak probe in the oil seal chamber detects any water leakage
into the chamber and turns on a red signal light in the control
panel. Pumps should be removed from sump and seals
replaced after seal light shows in the panel. Control panels
must be used for pumps having the seal leak probe.
Double seal pumps without the seal leak probe, should be
pulled and seal leak checked in 12 to 18 months.
LEVEL CONTROLS
All pumps must use sealed level control switches for
automatic operation. MLC and MFLC controls have sealed
mercury switches that are 1 H.P. rated at 230 volts. ALC and
AWS-1 controls have sealed mechanical switches that are
rated 2 H.P. at 230 volts.
Simplex single phase pumps can be made automatic by
attaching MFLC or MLC controls to pump. These switches
have a fixed draw off level of 8 to 10" and can be used up to
1 H.P. For higher H.P. ratings two mercury switch (or SMNO)
controls with a magnetic starter can be used.
The ALC and AWS-1 controls can be used for simplex single
phase pumps with ratings up to 2 H.P.
All duplex systems must use pilot mercury control sensor
switches with control box and magnetic starters.
Plug in cords can be used on all the single phase pumps
without seal leak detector. The cord has a GROUND pin that
plugs into a grounded receptacle. The grounded receptacle
cannot be used in the wet sump or basin due to DANGER of
current leakage.
Sealed junction boxes must be used in wet sumps or basins
to make connections to motor cord. The AWS-1 control also
acts as a sealed junction box for connecting power cord to
pump cord.
SAFETY WARNING
All pumps single or three phase must have a GROUND
WIRE that is connected to a screw in the metal pump
housing. This wire goes to the control box and is connected
to a good outside GROUND such as a metal water pipe or
GROUND STAKE driven at least 6 feet into the ground.
MOTOR TYPES
All single phase pump motors are of the permanent split
capacitor type that do not require a start switch or start relay.
Automatic reset overload switches are attached directly to the
motor windings.
Three phase pump motors require a magnetic starter with 3
leg overload protection.
INSTALLATION
Pumps can be installed inside sealed basin with proper
venting for either simplex or duplex systems. SIMPLEX or
DUPLEX basin systems are available. See Figs. 3 and 4.
It is not recommended that basins be used for RAW
SEWAGE inside the home, but are for use in office buildings
and small industrial buildings and factories.
Basins can be used inside the home where extra capacity
sump pumps are required for water softeners and wash
water.
If raw sewage must be pumped in the home use outside
basins that connect with pressure sewer mains or gravity
sewers, or run to septic tanks.
If an inside basin is used it is usually installed at time of
pouring the concrete floor.
Pumps can be installed in a compartment of septic tanks
for pumping to pressure sewer mains, gravity sewers, leach
fields, or evaporation mounds. See Figs. 5, 6 and 7.
PROPER VENTING FOR BASINS
INSTALLED INSIDE
All inside sealed basins must have a 2" or 3" vent pipe
installed in accordance with local codes. Sumps for handling
softener water, wash or drainage water do not have to be
sealed or vented.
Outside basins are usually of fiberglass and from 4 to 8 feet
deep and have a sealed cover. Pump is usually installed
with a lift out rail system so that pump can be removed
without disturbing the discharge piping. The check valve
comes out with pump for servicing. Complete LIFT OUT
SYSTEMS mounted in fiberglass basins are available to meet
customer's specifications.
Sump basin must be vented in accordance with
local plumbing codes. These pumps are not designed for and
CANNOT be installed in locations classified as hazardous in
accordance with the National Electric Code ANSI/NFPA 70.
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