Xylem GOULDS WATER TECHNOLOGY 1GD51G1A Serie Manual De Instruccion página 5

Three Phase Control Panels
Series 1GD and 12GDS three phase grinder pumps require
a control panel containing as a minimum:
• A 3 pole circuit breaker.
• Magnetic starter with ambient compensated Class 10
overloads.
• Transformer to supply 115 or 24 volt control power.
• Terminal wiring strip for all external connections.
RECOMMENDED CONTROL PANEL AND PUMP
OPTIONS
• A panel seal failure circuit with relay and warning device
can only be used if pump is equipped with a seal failure
sensor.
• High level alarm circuit
• Visual and/or audible high level alarm device.
Our Simplex and Duplex "Single Phase Grinder Panels" (see
the price book) contain built-in capacitors, a start relay and
wiring terminals.
In the event you wish to source a control panel locally we sell
capacitor kits which a panel shop will be able to build into a
custom panel. Note: the kits contain the capacitors and start
relay. These are not a field installable, add-on item. Building
the capacitor kits into a control panel is a job for a UL or CSA
approved panel shop. Due to concern for liability, installer
safety and Agency Listing, our Customer Service technicians
are forbidden to assist anyone attempting to field modify a
standard control panel using these capacitor kits. We hope
you understand and respect our position in this matter.
"Recommended Control Panels" are listed in the Product
Bulletins found in the respective product catalog or on the
website named on the front cover of this IOM.
Motor High Temperature Sensor:
The single phase 1GD or 12GDS pumps have an
optional feature, a built-in motor high temperature sensor.
This heat sensor opens and closes the circuit to the contactor
coil when properly wired into a control panel. It opens at a
motor temperature of 275°F (135°C) and stops the pump.
As the motor temperature drops to 112°F (78°C) the motor
automatically restarts.
Pump Seal Failure (Moisture Detection) Sensor:
An option on the 1GD and standard on the 12GDS. This
sensor located in the seal chamber detects the presence
of moisture in the seal chamber. When connected to an
optional seal failure relay and warning device in the control
panel it signals that service needs to be performed on the
lower seal.
The seal failure circuit option must be ordered as a con-
trol panel option, it is not supplied as a standard item.
FLOAT SWITCH TYPES
There are two basic float switch designs; single-action and
wide-angle. Single-action switches operate over a range of
15º so they open and close quickly. Wide-angle floats oper-
ate over a 90º swing with the tether length between the float
body and the pivot point controlling the On-Off range. The
design determines how many floats are required with differ-
ent systems or controls.
Floats may be normally open (NO) for pump down applica-
tions or to empty a tank. Normally closed (NC) switches are
used to pump up or to fill a tank.
A control switch may be used only with a control panel,
never direct connected to a pump.
SETTING THE FLOAT SWITCHES
There are no absolute rules for where to set the float switch-
es, it varies from job to job.
Suggested Rules to Follow:
All floats should be set below the Inlet pipe!
Off Float: Best: set so the water level is always above the top
of the pump (motor dome). Next Best: set so the water level
is not more than 6" below the top of the pump.
On Float: set so the volume of water between the On
and Off floats allows two (2) HP and larger pumps to run a
minimum of 2 minutes. Basin literature states the gallons of
storage per inch of basin height.
Lag/Alarm Float(s): should be staggered above the Off and
On floats. Try to use most of the available storage provided
by the basin, save some space for reserve storage capacity.
See Diagrams and Charts in Float Switch Chart Section.
PANEL WIRING DIAGRAMS
Our control panels are shipped with instructions and wiring
diagrams. Use those instructions in conjunction with this
IOM. Electrical installation should be performed only by
qualified technicians. Any problem or questions pertaining
to another brand control must be referred to that control
supplier or manufacturer. Our technical people have no
technical schematics or trouble shooting information for
other companies' controls.
ALARMS
We recommend the installation of an alarm on all Wastewa-
ter pump installations. Many standard control panels come
equipped with alarm circuits. If a control panel is not used,
a stand alone high liquid level alarm is available. The alarm
alerts the owner of a high liquid level in the system so they
can contact the appropriate service personnel to investigate
the situation.
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