Sterlco 140 to 6,285 Gallon Pump Tanks - Manual (Page 20)

Pump Tanks Chapter 6: Appendix 20 of 36
6-2 Remote Starters and NEMA Panels
Pump tanks can be provided with electrical controls such as basic motor starters or elaborate
NEMA panels.
Motor starters or NEMA panels can be shipped loose for field installation or pre-mounted for
space saving convenience. Motor starters are equipped with on/off selector switches for
turning the pump on with overload relays to protect the motor when operating. On tower
systems, re-circulating pump and tower fan motor starter are also provided with thermostats
for proper temperature. The chiller provides the temperature control on chilled water
systems.
All starters require a 120-volt power source for the control circuit.
NEMA Panel Standard Features
The NEMA panel is a properly sized enclosure to house all the starters required for each
pump tank system. A control circuit transformer is also provided to create the 120 volt
control circuit needed for starters and thermostats. A power distribution block is provided to
bring in main power to the panel. All internal wiring is provided and selector switches and
indicator lights are provided on the NEMA panel door with labels to indicate each device.
NEMA Panel Options
Each panel can be customized beyond the basic setup. A list of some of the possible additions
are as follows:
• Alarm circuitry with horn and strobe light
• High temperature alarm
• Low pressure alarm
• High pressure alarm
• Low flow alarm
• Low level alarm
• High level alarm
• Digital temperature display
• Amp meters
• Hour meters
• Digital flow meters
• UL panel
• Automatic water make-up
• Variable speed systems