FAQs

Questions

  1. What is a LEVEL CONTROL SYSTEM?
  2. What is a SEAL MOISTURE DETECTION SYSTEM?
  3. What is a PUMP HIGH TEMPERATURE SYSTEM?
  4. What is a HIGH WATER ALARM?
  5. What is a REDUNDANT HIGH WATER ALARM?
  6. What is a STATION ALARM?

Answers

Q. What is a LEVEL CONTROL SYSTEM?
A. A level control system shall be provided to start and stop pump motors in response to wet well liquid level. Pump on and off levels shall be sensed by float type liquid level sensors.
Q. What is a SEAL MOISTURE DETECTION SYSTEM?
A. A seal moisture detection system shall be provided for each pump to operate in conjunction with moisture detection probes in the pump motors. Detection of moisture shall illuminate a seal failure light on the inner swing panel and energize the station alarm circuit. The pump shall be allowed to continue to run. A latching relay shall maintain the alarm signal until the alarm condition has cleared and the circuit has been manually reset by depressing a pushbutton switch. An adjustable time delay relay (0.1 to 10 seconds) shall be provided to prevent false alarms due to electrical transients in the seal moisture detection system.
Q. What is a PUMP HIGH TEMPERATURE SYSTEM?
A. A pump high temperature protection system shall be provided for each pump to operate in conjunction with thermal probes in the pump motors. Detection of high temperature shall illuminate a high temperature light on the inner swing panel, shut down the affected pump and energize the station alarm circuit. A latching relay shall maintain the alarm signal until the alarm condition has cleared and the circuit has been manually reset by depressing a pushbutton switch. The overheated pump shall be allowed to restart after it has cooled down.
Q. What is a HIGH WATER ALARM?
A. Wet well high water level shall be sensed by a float switch installed to activate at the “high water alarm” level. Detection of high water shall illuminate a high water alarm light on the inner swing panel and energize the station alarm circuit. A latching relay shall maintain the alarm signal until the alarm condition has cleared and the circuit has been manually reset by depressing a pushbutton switch.
Q. What is a REDUNDANT HIGH WATER ALARM?
A. Wet well high water level shall also be sensed by a redundant float switch installed to activate the “high water alarm” level. Detection of high water by the redundant high water float shall signal the alarm dialer directly.
Q. What is a STATION ALARM?
A. A common station alarm circuit shall be provided. This circuit shall cause a station alarm light to go to a flashing mode and a station alarm horn to sound upon the occurrence of any alarm condition specified herein. The alarm circuit shall include a “Test-Normal-Silence” switch with spring return to the “Normal” position. With this switch in the “Test” position, the station alarm light shall go to a flashing mode and the alarm horn shall sound. When the “Test-Normal-Silence” switch is momentarily placed in the “Silence” position during an alarm condition, the alarm circuitry shall silence the station alarm horn and cause the station alarm light to go to full non-flashing brilliance and remain there until the alarm condition has cleared and the circuit causing the alarm has been manually reset. The alarm silence relay shall automatically reset upon manual reset of the circuit which caused the alarm to be sounded. Successive alarm conditions shall re-energize the station alarm horn and cause the station alarm light to go to the flashing mode even though the alarm silence relay has been set due to a previously silenced alarm.