Priming the Pump
Before priming the pump, or starting the pump, be sure that all suction and discharge lines are connected properly and that proper valves are open.
Pressing the Prime Key will start the pump at 100% speed and run for 60 seconds. The pump can be stopped at any time by pressing the Start/Stop key. All 60 seconds may not be required to prime the pump. Conversely, if additional priming is necessary, the Prime key can be pressed again.
If the pump does not prime, check the suction line for clogs, obstructions, or leaks.
Manual Operation
To run the pump in Manual Mode, ensure the “Manual Adjust -Local” light is on, or press the “Manual Adjust” key to activate (“Local” light will turn on). Press the Start/Stop key to start the pump running. Adjust pump speed by pressing the Up and Down arrow keys on the touchpad. To stop the pump, press the Start/Stop key.
If using the pump in Remote Start Stop Mode, press the Start/Stop key to put the pump in “Ready – Standby” state. The display will read “SBY” if waiting for a signal from the user-provided control system. Once a signal is received, the pump will start. Adjust pump speed manually by pressing the Up and Down arrow keys on the touchpad.
4-20ma Input Speed Control Mode
To run the pump in 4-20mA Mode, press the “4-20mA Input” key to active (“Remote” light will turn on.) Press Start/Stop key to start the pump running. Pump speed will be set by remote 4-20mA input signal. To stop the pump, press the Start/Stop key.
If using the pump in “Remote Start/Stop” Mode, press the Start/Stop key to put the pump in “Ready – Standby” state. The display will read “SBY” if waiting for a signal from the user-provided control system. Once a signal is received, the pump will start. Pump speed will adjust via 4-20mA input signal.
To see the actual input 4-20mA signal value, press the “Display” button in the upper left of the touchpad.
Calibration
To ensure the most accurate pumping, a pump calibration is recommended prior to operating the pump. The MD1 pump flow rate will vary depending on the system pressure. (Note: If system pressure varies frequently, a back-pressure valve will be necessary to ensure consistent flow accuracy.)
To calibrate the pump:
- Fill a calibration column or graduated cylinder with solution. Note the level of the fill.
- Run the pump at a set speed for 1 minute against the actual system pressure.
- Record the flow difference in the calibration cylinder.
- Calculate the flow rate by dividing the flow by the time. For example, if the pump runs for 1 minute, and the flow difference is 30 ml, then divide 30ml by 1 minute. The flowrate is 30 ml/min.
- For best accuracy, run more than one calibration to check results, or run another calibration at a different pump speed.
Calibration results should be close to the flow curve (below), but can vary depending on chemical composition, viscosity, temperature, and other conditions.
Diaphragm Failure Detection (DFD)
The MD1 pump is equipped with diaphragm leak detection pins located inside the pump. If a diaphragm fails or leaks for any reason, the chemical will contact the pins and trigger an alarm. (Note: pins will only detect conductive chemicals and may not trigger with water.)
If DFD alarm occurs, the pump will stop, close an alarm output, and the screen will flash DFD with an alarm icon. If the system has detected chemical, the pump diaphragm must be replaced and the pump head must be thoroughly cleaned.
Remove front cover to clean pump and DFD pins. Failure to clean pump head properly will void warranty.
FAQs
Frequently Asked Questions
MD1 Operation
- There is a large bubble in the manifolds, will this cause issues with my flow rate?
No, it will not cause issues with the flow rate.
Pump displays an Fu5 error message? What is causing it?This is actually the Flow Verification Sensor alarm. If the green light above the FVS button is on, the pump is checking for a signal back from a Flow Verification Sensor. If there is not a sensor installed, the pump will think there is no flow and display the FVS sensor error. To deactivate the sensor, turn the pump off, press the FVS button on the front of the pump so the green light is off.
How does the DFD work?The CD1 and MD1 are equipped with a Diaphragm Failure Detection System which is designed to stop pump and provide an
output alarm in event diaphragm should rupture and chemical enters pump head.
This system is capable of detecting presence of a large number of chemicals including Sodium Hypochlorite
(Chlorine), Hydrochloric (muriatic) Acid, Sodium Hydroxide, and many others. System will not be triggered by
water (rain, condensation, etc.) or lubricants.
If system has detected chemical, pump diaphragm must be replaced and pump head must be thoroughly cleaned. Failure to clean pump head will void warranty.
If DFD alarm occurs, pump will stop, close an alarm output, and screen will flash DFD with an alarm icon.
