- Control Panel Enclosures - refer to NEMA definitions for all control panel options.
- Power Circuit Options - one main disconnect with fused motor circuits, individual disconnects with fused motor circuits, or one main disconnect with motor branch circuit breakers.
- Each A/C motor starter is a full voltage, non reversing magnetic starter and is provided with adjustable 3 leg overload protection with manual overload reset push button.
- Each pump is provided with a panel mounted light (green) which illuminates when the pump is running, and H-O-A switch for manual and automatic operation. The hand or manual mode will not override system protection devices such as over temperature protection.
- Control Circuit will be 115 volt A/C and the transformer will be provided with two fuses on the primary and one fuse on the secondary.
- Thru the Door Reset buttons allows resetting the motor overloads when tripped without opening the panel. Reset is manual.
- Motor Overload Indicating Light (red) when illuminated indicates a tripped motor overload. This circuit will automatically start the next pump in the sequence. The motor reset is manual.
- Control Power (on-off) Switch and Light (amber) provides a means of isolating the control circuit without disconnecting the incoming power at the main disconnect. The light provides visual indication of power to the control circuit.
- a) Low Suction Pressure Shutdown with light (red) - suitable only if suction pressure is normally over 15 PSI. This equipment safety feature senses the pressure in the suction manifold; if the pressure drops below a preset point (determined by job conditions), all pumps will immediately shut off. Reset is automatic upon rise in suction pressure. This option guards against loss of suction pressure and potential contamination of the water supply.
b) Low Suction Level Shutdown with light (red) - this option involves the use of a level sensor on systems taking suction from a tank or reservoir. It protects pumps against running dry. The level sensor is provided for installation by others. It is a displacement type liquid level sensor (which avoids having mercury filled switches in the potable water). Reset is automatic upon rise in tank level.
Example: Many cities require an "air gap"; they will not allow pumping directly from their mains; consequently a tank is used.
Note: It may be appropriate to use a booster system without PRV's in this situation, since suction pressure is constant.
- Low System Pressure Circuit with light (red) - Often called "Lead Pump fail protection". This feature automatically starts one of the main pumps after a time delay if the pressure sensed in the booster's discharge manifold drops below a preset point (determined by job conditions). Panel indicator light remains on until manually reset.
- High Suction Pressure Shutdown with light (amber) - this energy saving option senses the suction pressure by means of a pressure switch. If the supply pressure rises above the system switch-off point and remains there for at least 20 seconds all pumps are turned off because the supply pressure is sufficient to satisfy water demands without them. The system automatically restarts when the suction pressure drops.
- High System Pressure Shutdown with light (red) - instantly shuts down all of the pumps and illuminates an alarm light if the discharge pressure exceeds a predetermined value (15 PSI above design) in order to protect piping, valves and other building fixtures from damage by over pressure. Reset is manual
- Audible Alarm - this consists of a buzzer which is activated whenever any of the alarms are energized. It also includes a silence button.
- Manual Alternation (2) equal pumps - Selector Switch provides manual selection of the pump sequencing.
- Manual Alternation (3) equal pumps - Selector Switch provides manual selection of the pump sequencing.
- Auto Alternator - two equal pumps. This feature will automatically alternate the sequence of the pumps on each shutdown cycle, and equalize their running time.
- Auto Alternator - three equal pumps. This feature will automatically alternate the sequence of the pumps on each shutdown cycle, and equalize their running time.
- 24 Hour Time Clock - two equal pumps. This feature will automatically alternate the sequence of the pumps at a predetermined time once every 24 hours.
- Seven Day Time Clock will automatically start and stop the booster system to coincide with the predetermined hours of building occupancy and provide intermittent system operation. This option is provided with an overriding low system pressure circuit and must include option 20 or 21.
- System Temperature Probe and Purge Valve. A temperature sensing device senses heat buildup in the system. If the water temperature increases to an excessive value, (approximately 110°F) the temperature probe circuit will open a valve. The opened valve allows the heated water to flow out, and cool water from the suction side to flow in. Reset is automatic.
- Individual Pump Temperature Probe and Purge Valve. The operation and purpose of this device is the same as described for option 20 above except each pump is equipped with a temperature sensing probe and valve device mounted on or as close as possible to the pump volute. Reset is automatic.
- Flow Switch to limit lead pump on/off cycling. This feature is used in conjunction with intermittent lead pump operation and the hydro-pneumatic tank option. A flow switch is mounted on one of the system manifolds and is wired in parallel with the lead pump start pressure switch and minimum run timer. This prevents high flow rate shutdowns, lead pump short cycling and maximizes the amount of stored water available from the hydro-pneumatic tank.
- Elapsed Time Meters are not reset able and provide a record of the hours of operation for each pump.
- Remote Alarm Panel with silence push button and light notifies personnel in a remote location of a system problem. The silence button does not extinguish the light. The problem must be corrected before the light goes out.
- Auxiliary Relay Contacts provides a means of tying the booster system operation into another control system.
- Test Button for purge valve allows manual operation of the temperature protection system, option 20 or 21.
- Phase Loss, Low/High Voltage Shutdown provides protection for the electric circuits from single phasing or excessively low or high voltage input.
- Key Lockable Enclosure provides protection from unauthorized access or tampering with the system control panel.
- Programmable Controller (P.C.) with EEPROM memory and status LEDs for both inputs and outputs. The P.C. replaces applicable standard relays, timers and alternator(s) and is most suitable for complex circuits.
- Lightning Arrester (secondary surge arrester) provides protection for the control panel and its components from lightning surges.
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