MYERS WHR, Installation And Servicing Instructions, Page: 3 / 24

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.
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.
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23833A201
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.
*This product contains mercury and must be disposed of according to local
and federal codes.