Franklin Electric SubDrive15 Connect N3R User manual

Owner’s Manual
SubDrive15/20/30/50
MonoDrive, MonoDriveXT
Connect NEMA 3R

s WARNING
!
Serious or fatal electrical shock may result from failure to connect the ground terminal to the motor,
SubDrive/MonoDrive controller, metal plumbing, or other metal near the motor or cable, using wire
no smaller than motor cable wires. To minimize risk of electrical shock, disconnect power before
working on or around the SubDrive/MonoDrive system. CAPACITORS INSIDE THE SUBDRIVE/
MONODRIVE CONTROLLER CAN STILL HOLD LETHAL VOLTAGE EVEN AFTER POWER HAS
BEEN DISCONNECTED.
ALLOW 5 MINUTES FOR DANGEROUS INTERNAL VOLTAGE TO DISCHARGE BEFORE REMOVING
SUBDRIVE/MONODRIVE COVER.
Do not use motor in swimming areas.
Before Getting Started
s ATTENTION
!
This equipment should be installed by technically qualied personnel. Failure to install it in compliance
with national and local electrical codes and within Franklin Electric recommendations may result in
electrical shock or re hazard, unsatisfactory performance, or equipment failure. Installation information
is available through pump manufacturers and distributors, or directly from Franklin Electric at our
toll-free number 1-800-348-2420.
s CAUTION
!
Use SubDrive/MonoDrive only with Franklin Electric 4-inch submersible motors as specied in this
manual (see Table 2, pg. 19). Use of this unit with any other Franklin Electric motor or with motors from
other manufacturers may result in damage to both motor and electronics. In applications where water
delivery is critical, a replacement pressure sensor and/or back-up system should be readily available if
the drive fails to operate as intended.
*Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc.
*Google Play™ is a trademark of Google Inc.
FE Connect
Wi-Fi connectivity is a feature of the drive that enables a connection to be made with a single
Wi-Fi device (smartphone or tablet). The connection can be used to monitor drive characteristics,
adjust advanced settings, and view or email fault history and configuration changes. The mobile
app can be downloaded from the Apple App Store or Google Play ™.
FE Connect Mobile App
Get the FE Connect App Today!

Table of Contents
Before Getting Started .............................................................2
Declaration of Conformity ..........................................................4
Description ......................................................................5
Features and Benets .............................................................5
Replaceable Parts ................................................................8
In the Box .......................................................................9
How it Works ....................................................................9
Drive Display ...................................................................10
Location of Drive ................................................................10
Special Considerations for Outdoor Use ..............................................11
Wire Routing....................................................................12
Grounding......................................................................14
Fuse/Circuit Breaker and Wire Sizing.................................................15
Generator Sizing.................................................................16
Tank and Pipe Sizing .............................................................17
Pump Sizing and Performance......................................................18
• SubDrive15 .................................................................18
• SubDrive20 .................................................................19
• SubDrive30 .................................................................20
• SubDrive50 .................................................................21
• MonoDrive ..................................................................22
• MonoDriveXT ................................................................22
Installation Procedure.............................................................23
Drive Mounting ................................................................23
Drive Wiring ..................................................................24
Drive Conguration...............................................................28
Basic Setup (DIP Switches) ......................................................28
Motor Type Selection ...........................................................28
Motor/Pump Size ..............................................................28
Pressure Sensor Selection .......................................................29
Pressure Setpoint ..............................................................29
Underload Sensitivity ...........................................................30
Steady Flow Selection ..........................................................31
Advanced Setup (Wi-Fi/FE Connect Mobile App) .......................................32
Connecting to Wi-Fi ............................................................32
Accessing the Drive ............................................................33
Set-up.......................................................................33
Monitoring....................................................................35
Logs ........................................................................35
Accessories ....................................................................36
Specications - MonoDrive/MonoDriveXT.............................................37
Specications - SubDrive15/SubDrive20..............................................38
Specications - SubDrive30/SubDrive50..............................................39
Diagnostic Fault Codes ...........................................................40
SubDrive Troubleshooting .........................................................42
Limited Warranty ................................................................44

SubDrive/MonoDrive Connect
4
Declaration of Conformity
MOTOR OVERLOAD PROTECTION NOTE:
The drive electronics provide motor overload protection by preventing motor current from
exceeding the maximum Service Factor Amps (SFA). Motor overtemperature sensing is not
provided by the drive.
BRANCH CIRCUIT PROTECTION
Integral solid state short circuit protection does not provide branch circuit protection.
Branch circuit protection must be provided in accordance with the National Electrical Code
and any additional local codes, or the equivalent. Drive shall be protected by inverse-time
fuse or Circuit breaker only, rated 300 V maximum, and per the full-load motor output
current rating, as noted in the Fuse/Circuit Breaker and Wire Sizing section.
INTERNAL LITHIUM BATTERY
CAUTION: Never place lithium batteries in mouth. If swallowed, contact your physician or
local poison control center. If battery is damaged, do not use. Battery shall be serviced or
replaced by a qualied serviceman.
Store new batteries only in the manufacturer's containers. Dispose/recycle used and
damaged batteries per local, regional, and national laws and regulations.
MAINTENANCE
Unless needed by the accessory kit or noted within this manual, no additional SubDrive/
MonoDrive maintenance is required.
Wi-Fi MODULE
The Wi-Fi module has been tested and found to comply with part 15 of FCC Rules.
These limits are designed to provide reasonable protection against harmful interference.
This equipment generates, uses, and can radiate radio frequency energy for limited
periods (approx. 15 min.) and, if the drive is not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference
by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Model No. Model Description
5870205003C MonoDrive Connect N3R
5870205103C SubDrive15 Connect N3R
5870205203C MonoDriveXT Connect N3R
5870205303C SubDrive20 Connect N3R
5870205403C SubDrive30 Connect N3R
5870205503C SubDrive50 Connect N3R
E184902

SubDrive/MonoDrive Connect
5
Description
The Franklin Electric SubDrive/MonoDrive is a variable frequency controller that uses
advanced electronics to protect the motor and enhance the performance of standard
pumps used in residential and light commercial water system applications. When used
with Franklin Electric motors (see Table 2 on Page 16), the SubDrive/MonoDrive provides
constant “city-like” water pressure by eliminating the effects of pressure cycling associated
with conventional water well systems.
Features and Benets
Constant Water Pressure
The Franklin Electric SubDrive/MonoDrive provides consistent pressure regulation using
advanced electronics to drive a standard motor and pump according to the pressure
demands indicated by a highly accurate, heavy-duty, long-life pressure sensor or analog
pressure transducer. By adjusting the motor/pump speed, the SubDrive/MonoDrive can
deliver constant pressure dependably, even as water demand changes. For example,
a small demand on the system, such as a bathroom faucet, results in the motor/pump
running at a relatively low speed. As greater demands are placed on the system, such
as opening additional faucets or using appliances, the speed increases accordingly to
maintain the desired system pressure. Using the provided analog pressure transducer,
system pressure can be set in the range of 5–95 psi (0.3–6.6 bar).
Reduced Tank Size
Conventional systems use larger tanks in order to store water, whereas SubDrive systems
utilize a smaller tank in order to maintain constant pressure. See Table 3 on page 17 for
pressure tank size requirements.
Reduced Pump Size
SubDrive/MonoDrive controllers t the pump to the application by adjusting the
speed of the pump and motor. In SubDrive applications, a pump with a power rating
of half the motor's power rating can be used when properly sized. See pump sizing
information on page 18.
Over Temperature Foldback
SubDrive/MonoDrive controllers are designed for full power operation in ambient
temperatures up to 122 °F (50 °C) at nominal input voltage. In extreme thermal conditions,
the controller will reduce output power in an attempt to avoid shutdown and potential
damage while still trying to provide water. Full output power is restored when the internal
controller temperature cools to a safe level.

SubDrive/MonoDrive Connect
6
Motor Soft Start
Normally, when there is a demand for water, the SubDrive/MonoDrive will be operating
to accurately maintain system pressure. Whenever the SubDrive/MonoDrive detects that
water is being used, the controller always “ramps up” the motor speed while gradually
increasing voltage, resulting in a cooler motor and lower start-up current compared to
conventional water systems. In those cases where the demand for water is small, the
system may cycle on and off at low speed. Due to the controller’s soft-start feature and the
sensor’s robust design, this will not harm the motor or the pressure sensor.
Power Factor Correction
Active Power Factor Correction (PFC) minimizes input RMS current by allowing the drive
to draw a cleaner, sinusoidal input current waveform. This allows for a reduction in input
power cable size when compared to similar applications without power factor correction,
because less average current is used by the drive for a given load when compared to
non-PFC devices.
Ground Fault Detection
The drive is equipped with Ground Fault Protection for the motor output. In the event that
a current leak to ground is detected on the motor output, the drive will indicate a Ground
Fault (Fault Code F16). See the Diagnostic Fault Codes table at the end of the instruction
manual for more information.
Adjustable Underload Sensitivity
The SubDrive/MonoDrive controller is congured at the factory to ensure detection of
Underload faults in a wide variety of pumping applications. In rare cases (as with certain
pumps in shallow wells), this trip level may result in nuisance faults. If the pump is installed
in a shallow well, activate the controller and observe system behavior. Once the controller
begins to regulate pressure, check operation at several ow rates to make sure the default
sensitivity does not induce nuisance Underload trips. See Basic Set-up section on page 28
for details regarding the Underload Potentiometer.
System Run Relay
The SubDrive/MonoDrive is tted with a relay output that activates (normally-open
contact will close) whenever the system is actively pumping. Both normally-open (NO)
and normally-closed (NC) contacts are provided. The contacts are rated 5 A at
250 VAC/30 VDC for general purpose loads, or 2A at 250 VAC/30 VDC for inductive
loads (i.e. relay). It is not recommended to use this function relay to control critical
systems (chemical dosing, etc.)
System Fault Relay
The SubDrive/MonoDrive is tted with a relay output that activates (normally-open
contact will close) whenever the system is faulted. Both normally-open (NO) and normally-
closed (NC) contacts are provided. The contacts are rated 5 A at 250 VAC/30 VDC for
general purpose loads, or 2A at 250 VAC/30 VDC for inductive loads (i.e. relay). It is not
recommended to use this function relay to control critical systems (chemical dosing, etc.).

SubDrive/MonoDrive Connect
7
Analog Pressure Transducer
The SubDrive/MonoDrive NEMA 3R family of controllers support a 4-20mA analog
pressure transducer input (100 PSI analog transducer is included with the controller).
The default pressure range is 5–95 PSI, with an adjustment knob provided to set the
desired system pressure. The drive will display the system pressure (ex. “50P” for
50 PSI) when using an analog pressure transducer rather than motor speed when using
the traditional SubDrive pressure sensor. Additional pressure transducer ranges are
supported by using the FE Connect mobile app.
Moisture / Wet Floor Sensor
An additional input to support an optional Franklin Electric Moisture Sensor (often referred
to as a “Wet Floor Sensor”) has been added to the SubDrive/MonoDrive NEMA 3R drive
family. When the system is equipped with a moisture sensor, the drive will stop pumping
and indicate a specic fault code when the sensor detects the presence of water. This does
not replace the need for a pressure relief valve in the system. Refer to the Accessories page
for ordering information.
Wi-Fi and FE Connect Mobile App
Wi-Fi connectivity is included in the drive to enable a connection to be made between the
drive and a single Wi-Fi capable device (smartphone, tablet, etc.). This connection can
be used in order to adjust advanced settings, monitor drive characteristics, and view fault
history when using the FE Connect mobile app. See the Advanced Set-up section on page
32 of this manual for more details regarding the capabilities of the Wi-Fi connection.
Auxiliary Control Input (App Only)
A 24 VDC dry-contact, digital control input labeled “Aux In” is provided to allow for
additional external control of the SubDrive/MonoDrive controller. This input can be
set using the FE Connect mobile app to control the drive in the following ways:
fault when high, fault when low.
Drawdown (App Only)
When using an analog pressure transducer in the system, an optional “cut-in” pressure
can be set to allow for pressure drawdown in the system. For example, a system set
point pressure of 50 PSI and a cut-in pressure of 30 PSI would allow the drive to regulate
system pressure at 50 PSI when running, but will not turn the drive on until the system
pressure drops below 30 PSI. The FE Connect mobile app is required to activate and set
the cut-in pressure.
Duplex Alternator Built-In (App Only)
The capability of the SubDrive Duplex Alternator product has now been built into the
SubDrive/MonoDrive NEMA 3R product family. A communication cable connected between
two (2) drives and the FE Connect mobile app are required to activate this feature.

SubDrive/MonoDrive Connect
8
Adjustable Underload Off Time (App Only)
The Underload Off Time determines how long the drive will wait before attempting to run
following an Underload event. The default time is 5 minutes, but is user-adjustable through
the Wi-Fi interface from 1 minute to 48 hours.
System Diagnostics Fault History (App Only)
In addition to regulating pump pressure and accurately controlling motor operation,
the SubDrive/MonoDrive continuously monitors system performance and can detect a
variety of abnormal conditions. In many cases, the controller will compensate as needed
to maintain continuous system operation; however, if there is a high risk of equipment
damage, the controller will protect the system and display the fault condition. If possible,
the controller will try to restart itself when the fault condition subsides. Each time a fault
is detected in the system, the drive records the fault and the actual date and time when
the fault was detected. A maximum of 500 events are recorded and can be viewed and
emailed using the FE Connect mobile app.
Adjustable Bump Modes (App Only)
Using the Advanced Setup (Wi-Fi and FE Connect App), the bump mode and tank size
settings of the drive can be changed. Bump mode controls how hard the drive will pump
for the very short time period just before attempting to shut down. The drive ships with
default settings that are compatible with the majority of SubDrive applications. For
applications with large pressure tanks or trouble shutting down, the bump mode can be
modied to be more aggressive. The system behavior should be monitored when adjusting
these settings to ensure proper operation.
Replaceable Parts
Cooling Fan
In the event that the cooling fan fails and results in an occurrence of frequent Overheated
Drive faults (Fault Code F7), the fan is able to be replaced. See Accessories section for
information regarding NEMA 3R Fan Replacement kits.
Enhanced Pressure Input Board
In the event that a lightning strike creates a surge on the various I/O terminals of the drive,
the Enhanced Pressure Input Board (EPIB) can become damaged, causing the drive to
not operate. Rather than replacing the entire drive, the EPIB can be replaced in an attempt
to repair the drive. See the Accessories section for information regarding the Enhanced
Pressure Sensor Input Board Replacement kit.

SubDrive/MonoDrive Connect
9
Pressure
Transducer
Leads
Power Supply
from Circuit Breaker
PUMP
MOTOR
A
D
BC
Pressure
Relief Valve
Pressure Transducer
Pressure Transducer must
be installed in the upright
and vertical position.
Power to Motor
In the Box
A. Controller Unit
B. Analog Pressure Transducer
C. Screwdriver/Adjustment Tool
D. Transducer Cable
E. Installation Guide
F. Strain Relief Fitting
How it Works
The Franklin Electric SubDrive/MonoDrive is designed to be part of a system that consists
of only four (4) components:
A. Standard Pump and Franklin Electric Motor
B. SubDrive/MonoDrive Controller
C. Small Pressure Tank (see Table 3, page 17)
D. Analog pressure transducer
D
B
D
B
SubDrive15/20/30
MonoDrive, MonoDriveXT
Owner’s Manual
Pressure
Transducer/Sensor
Run/Fault
Relays
AC
M
Moisture
Sensor
Display Control
AUX Input Alternator
Electrical Diagram

SubDrive/MonoDrive Connect
10
Drive Display
Drive Running
When the SubDrive/MonoDrive unit is controlling the motor and pump, the display will be
illuminated and the following information will be shown on the display:
• System pressure (in PSI) when using an analog pressure transducer. When
displaying system pressure, the display will include a “P” sufx to the numerical
pressure reading to distinguish it from motor speed. The “P” will steadily ash on
and off when the drive is running.
• Motor/pump speed (in Hz) when using the standard pressure sensor.
System Idle
When the SubDrive/MonoDrive unit is powered on and idle (not pumping water), the display
will be illuminated and the following will be shown on the display:
• System pressure (in PSI) with the “P” on steady (not ashing) when using an analog
pressure transducer - “- - -” when using the standard pressure sensor.
Fault Detected
When a fault condition is detected in the system, the drive display will illuminate red and
the fault code will be displayed. All fault codes begin with “F” and followed by a one- or
two-digit number. Consult the Diagnostic Fault Codes table in the back of this manual for
more information.
Location of Drive
The SubDrive/MonoDrive controller is intended for operation in ambient temperatures from
-13 °F to 122 °F (-25 °C to 50 °C) at 208/230 VAC input. The following recommendations
will help in selection of the proper location of the controller:
• A tank tee is recommended for mounting the tank, analog pressure transducer,
pressure gauge, and pressure relief valve. If a tank tee is not used, the pressure
transducer or pressure sensor should be located within 6 feet (1.8 meters) of
the pressure tank to minimize pressure uctuations. There should be no elbows
between the tank and pressure transducer or pressure sensor.
• The unit should be mounted on a sturdy supporting structure such as a wall or
supporting post. Please take into account the weight of the unit.
• The electronics inside the SubDrive/MonoDrive are air-cooled. As a result, there
should be at least 6 inches (15.24 cm) of clearance on each side and below the unit
to allow room for air ow.
• The mounting location should have access to 208/230 VAC electrical supply and to
the submersible motor wiring. To avoid possible interference with other appliances,
please refer to the Wire Routing section of this manual and observe all precautions
regarding power cable routing.
• The unit should not be installed in corrosive environments.

SubDrive/MonoDrive Connect
11
Special Considerations for Outdoor Use
The controller is suitable for outdoor use with a NEMA 3R rating; however, the following
considerations should be made when installing the controller outdoors:
• The unit MUST be mounted vertically with the wiring end oriented downward, and
the cover must be properly secured (also applies to indoor installations).
• The controller shall be mounted on a surface or back plate no smaller than the outer
dimensions of the controller enclosure.
• NEMA 3R enclosures are capable of withstanding downward-directed rain only.
The controller should be protected from hose-directed or sprayed water as well as
blowing rain. Failure to do so may result in controller failure.
• The controller should NOT be placed in direct sunlight or other locations subject to
extreme temperatures or humidity.
• Appropriate screening should be used for the air inlet and outlet when installed in
areas where insect or small animal intrusion is an issue. See Accessories page for
ordering information. Caution: Installation of non-approved screening may damage
the drive and/or reduce drive output. Screens should be cleaned on a regular basis
to ensure proper airow needed to cool the controller.
Service Entrance
Panel
Mount drive to a sturdy
supporting structure (wall or back plate).
Mount the drive as close
as possible to the service
entrance panel.
Use a dedicated branch circuit for the drive.
Wire directly from the service entrance panel.
Listed fuse/Listed circuit breaker “See Table 1
on page 18 for fuse and circuit breaker sizing.”
Allow a 6" (15 cm) clearance
around the drive for cooling.
Use the holes and
guides provided.
(DO NOT drill holes
in the drive.)
GND GND
Service entrance ground rod Wire directly to the service
entrance panel.
DO NOT wire to a sub panel
located in a home.
Service Entrance
Panel
IN HOME
Sub Panel
GND
GND GND
6"
15 cm
6"
15 cm
6"
15 cm
6"
15 cm
MOTOR OVERLOAD PROTECTION NOTE:
The drive electronics provide motor overload
protection by preventing motor current from exceeding
the maximum Service Factor Amps (SFA). Motor
overtemperature sensing is not provided by the drive.

SubDrive/MonoDrive Connect
12
Service Entrance
Panel
GND GND
When possible DO NOT run drive input
power or motor wires in parallel with house wiring.
Avoid running out-building wires in parallel with motor wires.
Pump
Motor
GND GND
Input
power Motor
Separate input power and motor
wiring by at least 8" (20.3 cm)
GND
GND
DO NOT run input power
and motor wires together.
Separate by at least 8" (20.3 cm)
Motor
Output lead to motor to
exit house as soon as possible.
8"
20.3 cm
Input
power
Wire Routing
To ensure the best protection from interference with other devices, please observe the
following precautions:

SubDrive/MonoDrive Connect
13
Service Entrance
Panel
GND
Motor
TV
Branch 1
Branch 2
Branch 3
8" (20.3 cm) min. 8" (20.3 cm) min.
8" (20.3 cm) min.
Telephone
If it is necessary to run wiring in parallel, keep
drive input power and motor wires
at least 8" (20.3 cm) from other house wiring.
Satellite/
Antenna wire
8" (20.3 cm) min.
GND
Service Entrance
Panel
GND
GND
8" (20.3 cm) min. 90º
OK
Cross over other branch circuits
and house wiring at 90º.
8" (20.3 cm) min.

SubDrive/MonoDrive Connect
14
Grounding
To ensure safety and performance, please observe the following grounding requirements:
Ensure that a
proper utility
ground rod
is present &
connected.
Service entrance
ground rod
Service Entrance
Panel
GND GND
L2
L1
An input power ground wire from
the supply panel must be connected
to the drive.
A dedicated output ground wire
from the drive must be connected
to the motor (motor wires and ground
wires must be bundled together).
Pump
Motor
Service Entrance
Panel
GND GND
Avoid multiple ground paths.
GND
GND
Pump
Motor
GND

SubDrive/MonoDrive Connect
15
Fuse/Circuit Breaker and Wire Sizing
The Listed fuse/Listed circuit breaker size and maximum allowable wire lengths for
connection to the SubDrive/MonoDrive are given in the following tables:
Model Family
Listed Fuse /
Listed Circuit
Breaker Amps
Nominal
Input
Voltage
AWG Copper Wire Sizes, 167 °F (75 °C) Insulation Unless Otherwise Noted
14 12 10 8 6 4 3 2 1 1/0 2/0
MonoDrive C 15 208 80 125 205 315 500 790 980 1290 1635 - -
15 230 95 150 250 385 615 970 1200 1580 2000 - -
SubDrive15 C 15 208 70 110 185 280 450 710 880 1160 1465 - -
15 230 85 135 225 345 550 865 1075 1415 1795 - -
MonoDriveXT C 20 208 - 85 140 220 345 550 680 895 1135 - -
20 230 - 105 175 265 425 670 835 1095 1390 - -
SubDrive20 C 20 208 - - 115 180 285 450 555 730 925 - -
20 230 - 85 140 220 345 550 680 895 1130 - -
SubDrive30 C 25 208 - - 95 145 235 370 460 605 765 - -
25 230 - - 115 180 285 455 560 740 935 - -
SubDrive50 C
40 208 - - - - 150 235 295 385 490 610 735
40 230 - - - 115 185 290 360 470 600 745 895
Table 1: Circuit Breaker Sizing and Maximum Input Cable Lengths (in Feet)
Based on a 3% voltage drop
XXXX Highlighted Numbers denote wire with 194 °F (90 °C) insulation only.
NOTE: Not to be used on a Ground Fault Circuit Interrupter (GFCI). If using an externally regulated generator, verify that the
voltage, Hertz and idle speed are appropriate to supply the drive.
Service Entrance
Panel
GND
GND
Use the service
entrance panel
ground ONLY.
DO NOT run ground wire separate.
Motor ground wire MUST be bundled with motor wires.
Pump
Motor

SubDrive/MonoDrive Connect
16
Table 2: Maximum Motor Cable Length (in feet*)
Controller Model Franklin Electric
Motor Model HP AWG 600V Copper Wire Sizes, 167
o
F (75
o
C) Insulation
14 12 10 8 6 4
SubDrive15 C 234 514 xxxx 1.5 (1.1 kW) 420 670 1060 - - -
SubDrive20 C 234 315 xxxx 2.0 (1.5 kW) 320 510 810 1000 - -
SubDrive30 C 234 316 xxxx 3.0 (2.2 kW) 240 390 620 990 - -
SubDrive50 C 234 317 xxxx 5.0 (3.7 kW) - 230 370 590 920 -
MonoDrive C
214 505 xxxx
214 507 xxxx
214 508 xxxx
0.5 (0.37 kW)
0.75 (0.55 kW)
1.0 (0.75 kW)
400
300
250
650
480
400
1020
760
630
-
1000
990
-
-
-
-
-
-
MonoDriveXT C
214 508 xxxx
224 300 xxxx
224 301 xxxx
1.0 (0.75 kW)
1.5 (1.1 kW)
2.0 (1.5 kW)
250
190
190
400
310
250
630
480
390
990
770
620
-
1000
970
-
-
-
*1 ft = 0.305 m
NOTES:
• The use of 600 V minimum rated motor cable is required.
• SubDrive models show cable lengths for highest power motor supported by each model.
• A 10-foot (3.05 m) section of cable is provided with the SubDrive/MonoDrive to connect the analog pressure transducer.
• Maximum allowable wire lengths are measured between the controller and motor.
• Aluminum wires should not be used with the SubDrive/MonoDrive.
• All wiring to comply with the National Electrical Code and local codes.
• MonoDrive minimum breaker amps may be lower than AIM Manual specications for the motors listed due to the soft-
starting characteristic of the MonoDrive controller.
• SubDrive minimum breaker amps may appear to exceed AIM Manual specications for the motors listed because
SubDrive controllers are supplied from a single-phase service rather than three-phase.
• Motor Overload Protection Note: The drive electronics provide motor overload protection by preventing motor current
from exceeding the maximum Service Factor Amps (SFA). Motor overtemperature sensing is not provided by the drive.
• Flat-jacketed submersible motor cable is recommended. All splices in the motor cable must be properly sealed with the
appropriate watertight shrink tubing. Extreme caution must be taken, especially when using non-jacketed motor cable,
to avoid damaging or compromising the motor cable insulation during installation
or service. Improper splicing or damage to motor cable insulation may expose the conductor(s) to moisture and can
produce motor cable failure.
Generator Sizing
Basic generator sizing for the Franklin Electric SubDrive/MonoDrive system is 1.5 times
the maximum input watts consumed by the drive, rounded up to the next normal-sized
generator.
Recommended minimum generator sizes:
MonoDrive C
1/2 hp = 2000 Watts (2 kW)
3/4 hp = 3000 Watts (3 kW)
1 hp = 3500 Watts (3.5 kW)
MonoDriveXT C
1.5 hp = 4000 Watts (4 kW)
2 hp = 5000 Watts (5 kW)
SubDrive15 C = 3500 Watts (3.5 kW)
SubDrive20 C = 5700 Watts (6 kW)
SubDrive30 C = 7000 Watts (7 kW)
SubDrive50 C = 11000 Watts (11 kW)
NOTE: Not to be used on a Ground Fault Circuit Interrupter (GFCI). If using an externally regulated generator, verify that the
voltage, Hertz and idle speed are appropriate to supply the drive.

SubDrive/MonoDrive Connect
17
Pump Flow Rating Controller Model Minimum Tank Size
Less than 12 gpm (45.4 lpm)
SubDrive15 or MonoDrive 2 gallons (7.6 liters)
SubDrive20 4 gallons (15.1 liters)
SubDrive30 or MonoDriveXT 4 gallons (15.1 liters)
SubDrive50 8 gallons (30.3 liters)
12 gpm (45.4 lpm) and higher
SubDrive15 or MonoDrive 4 gallons (15.1 liters)
SubDrive20 8 gallons (30.3 liters)
SubDrive30 or MonoDriveXT 8 gallons (30.3 liters)
SubDrive50 20 gallons (75.7 liters)
The pressure tank pre-charge setting should be 70% of the system pressure setting as
indicated in Table 4. The minimum supply pipe diameter should be selected not to exceed a
maximum velocity of 8 ft/sec (2.4 m/s) (See Table 5 below for minimum pipe diameter).
Table 3: Minimum Pressure Tank Size (Total Capacity)
Pressure Gauge
Pressure
Transducer
Pressure
Relief Valve Drain Valve
Pump
Motor
6 ft (1.83 m) max
The pressure tank pre-charge setting should be 70%
of system pressure setting.
Analog pressure transducer
must be installed in the upright
and vertical position.
PRESSURE SENSOR
Turn right (clockwise)
to increase pressure setting.
Turn left (counter clockwise)
to decrease pressure setting.
1/4 turn = 3 psi
Pressure sensor
(NSF61 rated) factory
preset for 50 psi
Position the pressure sensor
between vertical (preferred)
and horizontal. Do not install
inverted. Not to be placed in
direct sunlight.
7/32" Allen-wrench
(provided)
"
Submersible pumps can
develop very high pressure
in some situations. Always
install a pressure relief
valve able to pass full pump
flow at 100 PSI. Install the
pressure relief valve near
the pressure tank and run
to a drain capable of full
system flow.
WARNING
The pressure sensor
supplied with this controller
must be set between 25
and 80 psi (1.7 and 5.5 bar)
only.
WARNING
(Discharge into drain
rated for max pump
output at relief pressure.)
Pressure Sensor
Set Point (PSI)
5
10
15
20
25
30
35
40
45
50 (Factory set)
55
60
65
70
75
80
85
90
95
Pressure Tank
Pre-charge (± 2 PSI)
4
7
11
14
18
21
25
28
32
35
39
42
46
49
53
56
60
63
67
Pressure Setting Guide
Maximum Velocity 8 ft/sec. (2.4 m/s)
Min Pipe Dia. Max GPM (lpm)
1/2" 4.9 (18.5)
3/4" 11.0 (41.6)
1" 19.6 (74.2)
1-1/4" 30.6 (115.8)
1-1/2" 44.1 (166.9)
2" 78.3 (296.4)
2-1/2" 176.3 (667.4)
Table 4 Table 5
Tank and Pipe Sizing
The SubDrive/MonoDrive needs only a small pressure tank to maintain constant pressure.
(See table below for recommended tank size.) For pumps rated 12 gpm (45.4 lpm) or more,
a slightly larger tank is recommended for optimum pressure regulation. The SubDrive/
MonoDrive can also use an existing tank with a much larger capacity.

SubDrive/MonoDrive Connect
18
Pump Sizing and Performance
SubDrive15
The SubDrive15 is capable of use with 3/4 hp (0.55 kW) pumps that are mounted to
1.5 hp (1.1 kW) Franklin Electric three-phase motors. In general, the SubDrive15 will
enhance the performance of a 3/4 hp (0.55 kW) pump to a similar or better performance
than a conventional 1.5 hp (1.1 kW) pump of the same ow rating (pump series).
To select the proper 3/4 hp
(0.55 kW) pump, rst choose
a 1.5 hp (1.1 kW) curve that
meets the application’s head
and ow requirements. Use the
3/4 hp (0.55 kW) pump in the
same pump series (ow rating).
The SubDrive15 will adjust the
speed of this pump to produce
the performance of the 1.5 hp
(1.1 kW) curve.
An EXAMPLE of this is
illustrated in the graph at
right. Please consult the pump
manufacturer’s pump curve for
your specic application.
The SubDrive15 can also be set up to run a 1.0 hp (0.75 kW) or 1.5 hp (1.1 kW) pump if
desired, but larger pumps will still produce to the 1.5 hp (1.1 kW) curve and may only be
operated with a 1.5 hp (1.1 kW) motor. To operate a different pump size, a DIP switch must
be positioned to select the correct pump rating. Otherwise, the SubDrive15 may trigger
erroneous faults.
See the Basic Set-up section of this manual for DIP switch information and settings.
s WARNING
!
Serious or fatal electrical shock may result from contact with internal electrical components.
DO NOT, under any circumstances, attempt to modify DIP switch settings until power has been
removed and 5 minutes have passed for internal voltages to discharge! Power must be removed
for DIP switch setting to take effect.
EXAMPLE 1
Typical SubDrive15 Performance
SubDrive15

SubDrive/MonoDrive Connect
19
SubDrive20
The SubDrive20 is capable of use with 1.0 hp (0.75 kW) pumps that are mounted to
2.0 hp (1.5 kW) Franklin Electric three-phase motors. In general, the SubDrive20 will
enhance the performance of a 1.0 hp (0.75 kW) pump to a similar or better performance
than a conventional 2.0 hp (1.5 kW) pump of the same ow rating (pump series).
To select the proper 1.0 hp
(0.75 kW) pump, rst choose a
2.0 hp (1.5 kW) curve that meets
the application’s head and ow
requirements. Use the 1.0 hp
(0.75 kW) pump in the same
pump series (ow rating). The
SubDrive20 will adjust the speed
of this pump to produce the
performance of the 2.0 hp
(1.5 kW) curve.
An EXAMPLE of this is
illustrated in the graph at
right. Please consult the pump
manufacturer’s pump curve for
your specic application.
The SubDrive20 can also be set up to run a 1.5 hp (1.1 kW) or 2.0 hp (1.5 kW) pump if
desired, but larger pumps will still produce to the 2.0 hp (1.5 kW) curve and may only be
operated with a 2.0 hp (1.5 kW) motor. To operate a different pump size, a DIP switch must
be positioned to select the correct pump rating. Otherwise, the SubDrive20 may trigger
erroneous faults.
See the Basic Set-up section of this manual for DIP switch information and settings.
s WARNING
!
Serious or fatal electrical shock may result from contact with internal electrical components.
DO NOT, under any circumstances, attempt to modify DIP switch settings until power has been
removed and 5 minutes have passed for internal voltages to discharge! Power must be removed
for DIP switch setting to take effect.
EXAMPLE 2
Typical SubDrive20 Performance
SubDrive20

SubDrive/MonoDrive Connect
20
SubDrive30
The SubDrive30 is capable of use with 1.5 hp (1.1 kW) pumps that are mounted to
3.0 hp (2.2 kW) Franklin Electric three-phase motors. In general, the SubDrive30 will
enhance the performance of a 1.5 hp (1.1 kW) pump to a similar or better performance
than a conventional 3.0 hp (2.2 kW) pump of the same ow rating (pump series).
To select the proper 1.5 hp
(1.1 kW) pump, rst choose
a 3.0 hp (2.2 kW) curve that
meets the application’s head
and ow requirements. Use
the 1.5 hp (1.1 kW) pump
in the same pump series
(ow rating). The SubDrive30
will adjust the speed of
this pump to produce the
performance of the 3.0 hp
(2.2 kW) curve.
An EXAMPLE of this is
illustrated in the graph at
right. Please consult the
pump manufacturer’s
pump curve for your
specic application.
The SubDrive30 can also be set up to run a 2.0 hp (1.5 kW) or 3.0 hp (2.2 kW) pump if
desired, but larger pumps will still produce to the 3.0 hp (2.2 kW) curve and may only be
operated with a 3.0 hp (2.2 kW) motor. To operate a different pump size, a DIP switch must
be positioned to select the correct pump rating. Otherwise, the SubDrive30 may trigger
erroneous faults.
See the Basic Setup section of this manual for DIP switch information and settings.
EXAMPLE 3
Typical SubDrive30 Performance
SubDrive30
s WARNING
!
Serious or fatal electrical shock may result from contact with internal electrical components.
DO NOT, under any circumstances, attempt to modify DIP switch settings until power has been
removed and 5 minutes have passed for internal voltages to discharge! Power must be removed
for DIP switch setting to take effect.