Description - Pentair MYERS MWH50 Série Manuel D'installation Et D'utilisation

DESCRIPTION

DESCRIPTION
Myers ME and MW series pumps are available in both a single
seal as well as a double seal design with leak detector. The
ME50-ME150 models are designed for effluent dosing, Septic
Tank Effluent Pumping (S.T.E.P.) or normal sump and general
dewatering applications where higher pressure is required.
These units are designed to handle ¾" spherical solids.
The MWH50-MW200 models are designed for raw sewage
applications and can pass 2" spherical solids. These units can
also be used for sump and general dewatering applications
where larger solids capabilities are required.
When used in effluent dosing or S.T.E.P. applications, the pump
must be installed in a separate tank or compartment at the
discharger side of the septic tank. Never install pump in tank
where sludge collects.
These pumps are available in single phase and three phase,
and either in single seal or double seal with seal leak detector.
All three phase units, all double seal units and all duplex
installations must be used with a control box. All power cords
and seal leak detector cords are 20 feet long.
The ME model impellers are enclosed two vane type to handle
¾" spherical solids and are available made of engineered
thermoplastic or optional naval bronze. All pumps have a 2" NPT
discharge tapping.
The MW model impellers are enclosed two vane non-clog
style, designed to handle 2" spherical solids. The MW pumps
are available with standard cast iron or optional naval bronze
impellers.
These pumps are NOT for use in swimming pools or fountains.
AIR LOCKING
A sump pump is said to be air locked if water traps air in the
pump and it cannot get out, thus preventing the pump from
operating.
In installation of this type a 1/8" hole should be drilled in the
discharge pipe just above the pump discharge and a check valve
should be installed 12 to 18 inches above pump discharge. Do not
put check valve directly into pump discharge opening - follow
local code.
PACKAGING
Each pump is packaged separately in a carton marked with a
catalog number and the Myers engineering number.
LEVEL CONTROLS
All pumps must use sealed level control switches for automatic
operation. MLC and MFLC controls have sealed switches that
are 1 HP rated at 230 volts. ALC and AWS-1 controls have sealed
mechanical switches that are rated 2 HP at 230 volts.Simplex
4
single phase pumps can be made automatic by attaching MFLC
or MFS controls to the pump. These switches have a fixed draw
off level of 8 to 10 inches and can be used up to 1 HP. For higher
horsepower ratings two mercury switches (or SMNO) controls
with a magnetic starter can be used. Simplex systems may
also use on/off pilot mercury control switches (when permitted
by code) with control box and magnetic starter. The ALC and
AWS-1 controls can be used for simplex single phase pumps with
ratings up to 2 HP. All duplex systems must use pilot mercury
control switches with control box and magnetic starters.
Plug-in cords can be used on all the single phase pumps with
a single seal (does not have a seal leak detector). This 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.
DOUBLE SEAL PUMPS
All pumps in this series "ME—D" or "MW—D" have two seals with
an oil chamber between the seals so that the seal faces of
both the 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 all made with a seal leak
detector.
The leak detector 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 the sump
and seals replaced after the seal light shows in the panel.
Control panels must be used for pumps having the seal leak
detectors, and seal leak detectors must be wired as illustrated
in these instructions.
D ESIGN 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.
23822A278 (02-13-20)