suction strainer: Systems may include one or two pumps with alternator as required by Contract Documents: Pump housings may be cast iron, bronze, or stainless steel. Cast iron housings for submersible pumps shall be epoxy coated. Impeller: Brass, bronze or stainless steel. Shaft: Bronze, stainless steel or other VA approved corrosion resisting metal. Bearings: As required to hold shaft alignment, anti-friction type for thrust permanently lubricated. Bio-based materials shall be utilized when possible. SPEC WRITER NOTE: Use NEMA Type 4 for drip proof (vertical) or NEMA Type 6P for completely enclosed (submersible). Motor: Maximum 40 degrees C (104 degrees F) ambient temperature rise, hermitically sealed, lifting eye, voltage and phase as shown in schedule on Electrical drawings conforming to NEMA Type 6P. Size the motor capacity to operate the pump without overloading the motor at any point on the pump curve. Refer to Section 22 05 12, GENERAL MOTOR REQUIREMENTS FOR PLUMBING EQUIPMENT. Starting Switch: Manually operated, tumbler type, as specified in Section 26 29 11, MOTOR CONTROLLERS. Automatic Control and Level Alarm: Furnish a control panel in a // NEMA Type 1 enclosure for indoors // // NEMA Type 4X enclosure for outdoors //. The controls shall be suitable for operation with the electrical characteristics listed on the Electrical drawings. The control panel shall have a level control system with switches to start and stop pumps automatically, and to activate a high water alarm. The level control system shall include sensors in the sump that detect the level of the liquid. The sensors may be Stainless steel or corrosion resistant float type switches, ultrasonic level sensors, transducers, or other appropriate equipment. The high water alarm shall have a red beacon light at the control panel and a buzzer, horn, or bell. The alarm shall have a silencing switch. Provide auxiliary contacts for remote alarming to the Energy Control Center and BACnet compatible open-protocol type interface to // existing // DDC Controls System. The circuitry of the control panel shall include: Power switch to turn on/off the automatic control mechanism
suction strainer: Systems may include one or two pumps with alternator as required by Contract Documents: Pump housings may be cast iron, bronze, or stainless steel. Cast iron housings for submersible pumps shall be epoxy coated. Impeller: Brass, bronze or stainless steel. Shaft: Bronze, stainless steel or other VA approved corrosion resisting metal. Bearings: As required to hold shaft alignment, anti-friction type for thrust permanently lubricated. Bio-based materials shall be utilized when possible. SPEC WRITER NOTE: Use NEMA Type 4 for drip proof (vertical) or NEMA Type 6P for completely enclosed (submersible). Motor: Maximum 40 degrees C (104 degrees F) ambient temperature rise, hermitically sealed, lifting eye, voltage and phase as shown in schedule on Electrical drawings conforming to NEMA Type 6P. Size the motor capacity to operate the pump without overloading the motor at any point on the pump curve. Refer to Section 22 05 12, GENERAL MOTOR REQUIREMENTS FOR PLUMBING EQUIPMENT. Starting Switch: Manually operated, tumbler type, as specified in Section 26 29 11, MOTOR CONTROLLERS. Automatic Control and Level Alarm: Furnish a control panel in a // NEMA Type 1 enclosure for indoors // // NEMA Type 4X enclosure for outdoors //. The controls shall be suitable for operation with the electrical characteristics listed on the Electrical drawings. The control panel shall have a level control system with switches to start and stop pumps automatically, and to activate a high water alarm. The level control system shall include sensors in the sump that detect the level of the liquid. The sensors may be Stainless steel or corrosion resistant float type switches, ultrasonic level sensors, transducers, or other appropriate equipment. The high water alarm shall have a red beacon light at the control panel and a buzzer, horn, or bell. The alarm shall have a silencing switch. Provide auxiliary contacts for remote alarming to the Energy Control Center and BACnet compatible open-protocol type interface to // existing // DDC Controls System. The circuitry of the control panel shall include: Power switch to turn on/off the automatic control mechanism
221436SubPumpUnits.docx