Xylem Flygt FGC 400, Инструкция по установке, эксплуатации и обслуживанию

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WS009296A
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1. Overflow
2. High level
3. Start level, standby pump
4. Start level, duty pump
5. Stop level
6. Low level
5.3 Pump control
Pump activation
Level sensors, or switches, give the signals to start and stop the pumps at
different levels.
High Level Runtime
The high-level float switch signals the controller to start all the pumps
immediately. After that, they run for a defined period.
Low Level Block Time
The low-level float switch signals the controller to stop all the pumps
immediately. After that, they are blocked for a defined minimum period. See
also the Inter-Pump Delay function.
Dry Run Protection
This function is used to prevent the pumps from running dry. When activated,
the pumps stop at the stop level regardless of any configured delay.
Inter-Pump Delay
This function prevents the pumps from starts and stops in quick successions,
which can damage the wastewater piping system and activate the overcurrent
protection.
Minimize Fat Build-Up
This function applies a random pump start level, or random start delay, to avoid
a fat ring build-up at the start level. The pump then starts at slightly different
levels each time. The random start levels are always higher than the configured
start level. This function only applies to the duty pump.
Alternation Mode
In a two-pump station, the pumps alternate on each pump cycle by default. The
station can instead be configured to run the pump with the shortest total run
time, or to not alternate at all. If the duty pump is unavailable, then the standby
pump becomes the lead pump, regardless of alternation mode.
5 Function Description
14 Flygt FGC 400 Installation, Operation, and Maintenance