S-Drive FAQ

Single Pump Drive –SPD-S-Drive™ Frequently Asked Questions

What are the Aquavar S-Drive and Aquvar SPD from Goulds ?
What horsepower and voltages are available?
Can I mount the S-Drive/SPD outdoors?
What are the temperature limits for the S-Drive/SPD?
Do I need to install a LOAD REACTOR/FILTER for my long motor cables?
Can I use single phase 208 – 230volt input for the S-Drive/SPD?
Should I oversize the S-Drive/SPD drive based on the submersible motor service factor amps?
What does the S-Drive/SPD controller protect on the motor and pump?
What is the maximum speed for the S-Drive/SPD?
How do I adjust the constant system pressure set point with the S-Drive/SPD?
Can I adjust my ramp up and ramp down times?
Can I adjust my restart times for the Dry well/ Loss of prime protection?
My motor rotates backwards. How do I change rotation?
What size tank should I use for the S-Drive/SPD constant pressure system?
Can I use the S-Drive in a multi-pump duplex, triplex or Quad system?
Is the pressure transducer included with my S-Drive/SPD controller?
What is the maximum pressure set point for the S-Drive/SPD?
Do I need to ground my pressure transducer/sensor?
Can I run my S-Drive/SPD controller when I have a pressure transducer failure?
Can I stop and start my drive with an external switch?
Can I allow a pressure drop before the drive starts the pump?
Can I operate the S-Drive/SPD in “hand” mode?
Can I set two different pressure settings for my irrigation or municipal constant pressure system?
How do I size the S-Drive for my pump and submersible motor?
Can I use the service factor amps to size my pump?
Can I use a back up generator with the S-Drive/SPD?
What are the standard warranty terms for the S-Drive/SPD?
Is there a repair option for the S-Drive/SPD?
Can you use the S-Drive/SPD on a 230Volt “Open Delta” 3 wire power system?
Can I connect the S-Drive/SPD to a SCADA (Supervisory Control And Data Acquisition) system for monitoring and control?
Can I control a metering or injection pump with the S-Drive/SPD?
What pressure do I charge my tank?
Can I use my existing tank size or multiple tanks on retro-fit jobs?
Is there any maintenance required for the S-Drive/SPD?
Where are the units stocked and supported?
Will the S-Drive auto reset on all faults?
After a fault, how do I reset my drive?
What are the most common causes of start-up and run problems?

Answers

What are the Aquavar S-Drive and Aquvar SPD from Goulds?
The S-Drive is a commercial simplex, variable speed, constant pressure submersible pump controller. It has a built in motor LOAD FILTER for long motor leads and is rated for outdoor mounting. The SPD is designed for booster applications and does not require the load filter.
What horsepower and voltages are available?
The Aquavar S-Drive and SPD are offered from 5HP through 30HP, 230 and 460 volt input. The Aquavar SPD Plus extends the range to 100 HP with 3ø power. The line to line voltage must be in the range of 195Vac to 265Vac (230V +/– 15%) for 230V models and 391Vac to 529Vac (460V +/– 15%) for 460V models.
Can I mount the S-Drive/SPD outdoors?
Yes. The S-Drive is rated for NEMA 3R, rain proof when proper conduit connections and liquid tight fitting are used for the cables. A sun shield (not supplied) is recommended for direct sunlight.
What are the temperature limits for the S-Drive/SPD?
-22 degrees F to 122 degrees F.
Do I need to install a LOAD REACTOR/FILTER for my long motor cables?
No. The S-Drive has an integrated LOAD FILTER which protects the motor insulation up to 1000 ft from the controller. The SPD, which is intended for use with above ground motors, does not include an output filter.
Can I use single phase 208 – 230volt input for the S-Drive/SPD?
Yes. Single phase input can be used providing that you connect your line voltage to L1 and L3 and set the overload switch to 50% of the motor current rating. In essence you are de-rating the drives current rating by 50%. Therefore, if you have a 10HP, 230volt motor you should size a 20HP, 230volt S-Drive for single phase input power.
Should I oversize the S-Drive/SPD drive based on the submersible motor service factor amps?
No. All S-Drive controllers are sized for the MAX AMPS of any commercially available three phase submersible motors. Therefore, if you have a 10HP, 230volt three phase sub motor and have three phase input power you can use a 10HP, 230volt S-Drive.
What does the S-Drive/SPD controller protect on the motor and pump?
The S-Drive/SPD provides protection on motor current overload, low and high voltage input, short circuit equipment protection, loss of suction or dry well, ground leaks, phase loss.
What is the maximum speed for the S-Drive/SPD?
The controller will limit speed to 60HZ output frequency to the motor.
How do I adjust the constant system pressure set point of the S-Drive/SPD?
Similar to the Goulds Aquavar AB II product, you would open a fixture and start the pump, then PRESS and HOLD the INC or DEC button to set your system pressure. Once the system maintains the system pressure and turns off, the controller saves this setting and will continue to maintain this pressure even during power outages. Please note: The pump needs to be running in order to increase or decrease your desired pressure.
Can I adjust my ramp up and ramp down times?
Yes. Using the ACCEL and DECEL switch setting you can adjust your ramp times.
Can I adjust my restart times for the Dry well/ Loss of prime protection?
Yes. Use the switch setting labeled “no water restart time” to adjust protection for low yielding wells with slow recovery. From 10 minutes up to 2 hours between restarts on loss of prime or dry well protection.
My motor rotates backwards. How do I change rotation?
Motor rotation can only be changed by switching any 2 wires on the output side of the controller, T1, T2 or T3. Changing wires on the Input side of the controller will have no affect on motor rotation.
What size tank should I use for the S-Drive/SPD constant pressure system?
Use the 20% total system gallon per minute rule. If your system is 100 GPM max, then use a 20 gallon total volume tank. Pre-charge your empty tank to 10-15 psi below your system pressure.
Can I use the S-Drive/SPD in a multi-pump duplex, triplex or Quad system?
No. The S-Drive/SPD is designed and programmed specifically for single pump applications that require a smoother constant pressure and pump/motor protection. For multi-pump systems, use the Aquavar CPC series of controllers.
Is the pressure transducer included with my S-Drive/SPD controller?
Yes. Each drive, similar to other Goulds variable speed controllers includes a pre-wired pressure transducer and shielded cable. The included transducer has a maximum 300PSI, and operates in the 4-20 milliamp range.
What is the maximum pressure set point for the S-Drive/SPD?
The maximum pressure set point is based on the transducer range, which is 0 – 300 psi. The effective range is actually 20 to 240 psi. Accuracy drops off outside of the range of 20-240 PSI. Please ensure your system can withstand higher pressures and the pump is capable of generating this type of pressure.
Do I need to ground my pressure transducer/sensor?
No. The S-Drive pressure transducer has an internal ground wire that connects the sensor electronics back to the chassis of the controller for a common system ground.
Can I run my S-Drive/SPD controller if I have a pressure transducer failure?
Yes. Connect terminals #4 and #3 to a standard pressure switch (no power) and the drive will ramp up to full speed when the switch is closed. When the switch is open the drive will ramp down and stop. This will provide a soft start ON/OFF system until a new pressure transducer is provided.
Can I stop and start my drive with an external switch?
Yes. Connect terminals #2 and #1 with your non-powered switch. When the contact is OPEN the drive will be in the STOP mode, when the switch is CLOSED the drive will be in the RUN mode.
Can I allow a pressure drop before the drive starts the pump?
Yes. Connect terminals # 12 and #9 and the drive will allow a 20psi pressure drop before starting the motor. Then the drive will ramp up and maintain pre-set system pressure. After the unit has achieved set pressure it will stop, then repeat this cycle as long as the jumper wire is in between 12 and 9 on the terminal board. The standard pressure drop set point is 5 PSI.
Can I operate the S-Drive/SPD in “hand” mode?
Yes. Connect terminals # 3 and #4 with a jumper wire and the drive will run the pump and motor up to Full speed, or current limited to maximum speed.
Can I set two different pressure settings for my irrigation or municipal constant pressure system?
Yes. Connect terminals # 11 and #9 and the drive will allow another pressure set point by pressing and holding the INC button. When the contact is OPEN, the drive will change back to your original pressure setting. Can be used with a timer or non-powered switch.
How do I size the S-Drive for my pump and submersible motor?
Size based on motor Service Factor Amps and voltage. The S-Drive is specifically sized in amperage to run submersible pumps and motors to their maximum allowable amperage as noted by the manufacturer. The motor overload switch should be set for the specific motor service factor amps.
Can I use the service factor amps to size my pump?
Yes. Remember, NEMA motor manufacturers allow service factor use intermittently NOT CONTINUOUS. If you need service factor amps temporarily, size it using the service factor amps. In hot environments or high elevations, it is NOT recommended to use service factor for above ground motors.
Can I use a back up generator with the S-Drive/SPD?
Yes. Make sure you size the generator to provide at least 120% of total current and power consumption of your controller system. KVA = (Volts x Amps x 1.73)/1000. The drive has soft start which prevents sudden sags in voltage. Please use a delay switch for automatic turn on generators.
What are the standard warranty terms for the S-Drive/SPD?
All S-Drive/SPD or Aquavar products have a 24/30 month workmanship/product defect warranty. 24 months from start up OR maximum 30 months from manufacture date code located on the side label of the unit. The serial number indicates the build date.
Is there a repair option for the S-Drive/SPD?
Not at this time. We have a return and replace policy based on warranty analysis. Pressure Transducers are available for repair or replacement. Send units back to Seneca Falls NY for evaluation. Our address is : 2881 East Bayard Street, Seneca Falls, NY 13148
Can you use the S-Drive/ SPD on a 230Volt “Open Delta” 3 wire power system?
Yes, however, this is sometimes referred to as a “wild leg” delta system. This is really a single phase system with two transformers to derive a third leg. This system provides POOR POWER regulation under loads. When you take a static voltage check, it may appear o.k. However, when you start the pump the third leg will vary. This “wild leg” will have a voltage that is different from the other legs.(L1-231V,L2- 230V, L-3 316V). Treat these as SINGLE phase systems and oversize your drive. Use a 20HP drive on a 10HP 230volt pump.
Can I connect the S-Drive/SPD to a SCADA (Supervisory Control And Data Acquisition) system for monitoring and control?
Yes. The S-Drive has 4 digital inputs, 1 analog output and 2 form C “dry” relays for monitoring and control purposes.
Can I control a metering or injection pump with the S-Drive/SPD?
Yes. Using the Analog Output 4-20mA signal provided on contact #10 and #9. This will provide a linear signal based on the speed of your main pump. Therefore at 0HZ your output would be 4mA and at full speed 60HZ, your output will be 20mA.
What pressure do I charge my tank?
10-15psi below system discharge pressure. Ensure that the tank is not filled with water when charging with air.
Can I use my existing tank size or multiple tanks on retro-fit jobs?
On retro-fit jobs we would recommend that you remove or bypass existing tanks that are greatly oversized for the system. If too large a tank is used there is a risk of creating stagnate water inside the tank due to lack of fluid exchange. If you prefer to use an older tank that is oversized for the system, you can reduce the risk of creating stagnate water by increasing the air pressure inside the tank closer to the desired water system pressure. This will result in is less volume of water inside the tank and reduce the risk of creating stagnate water. Or a tank can be removed from the system by setting the air bladder pressure higher than the system water pressure. Another option for reducing the risk of stagnate water associated with oversized tanks is to set the Pressure Drop setting on the User Interface board to 20psi. This will ensure the largest possible fluid exchange. The use of oversized tanks can also cause short cycling of the drive where the tank is replenished by the pump and the large tank supplies the system. At low flow rates this can cause the drive to turn off the pump due to the slow changing pressure in the system.
Is there any maintenance required for the S-Drive/SPD?
No. Other than keeping free from debris, insects, and maintaining the cooling fans.
Where are the units stocked and supported?
Goulds Pumps stocks product at our various customer service centers throughout the US and Canada: Lake Mary FL, Fresno CA, Auburn NY, Guelph Ontario Canada, Seneca Falls NY (main tech support).
Will the S-Drive auto reset on all faults?
No. Auto restart is not available on: Short Circuit. All other faults will auto-restart five times or until the fault goes away.
After a fault, how do I reset my drive?
Power down using the circuit breaker or fused disconnect. Power should be kept off for 5 minutes to assure the capacitors have had time to fully discharge. You can then power up the drive.
What are the most common causes of start-up and run problems?
Please verify the following:

  • Incorrect wire sizing. Please refer to the wire sizing chart in the IOM. Calculate for both input and output distances.
  • Loose wiring, either on the incoming or the output to the motor. Verify that leads are properly connected.
  • Transducer wiring. Transducer cable should be run separate from the wiring, in its own conduit if possible. Do not leave any remaining cable exposed. Please cut to proper length.
  • Improper switch settings. Verify motor overload settings and ramp settings. Refer to the specified chart in the IOM.
  • Improper rotation of the motor. Power down the drive for 5 minutes to fully discharge the capacitors, and switch any of the two leads and verify proper rotation.
  • A good installation requires a qualified electrician and the use of the instruction manual for reference.