Pentair FLECK NXT2 User manual

pentair.com
FLECK® NXT2 TIMER
SERVICE MANUAL
FLECK

TABLE OF CONTENTS
OPERATING PARAMETERS...................................................... 3
FEATURES................................................................................ 3
TIMER DISPLAY........................................................................ 4
TIMER OPERATION .................................................................. 5
TIMER FEATURES .................................................................... 6
SYSTEM DEFINITIONS ............................................................. 8
MASTER PROGRAMMING MODE FLOW CHART...................... 9
USER PROGRAMMING MODE FLOW CHART........................... 10
DIAGNOSTIC PROGRAMMING MODE FLOW CHART ............... 11
TIME OF DAY PROGRAMMING MODE FLOW CHART............... 12
NXT2 TIMER ASSEMBLY
(2510, 2750, 2850, 2900, 3150, 3900 VALVES) .......................... 14
NXT2 TIMER ASSEMBLY (2815 VALVE) .................................... 15
NXT TO NXT2 CONVERSION KITS............................................ 16
NXT2 WIRING DIAGRAM .......................................................... 17
POWER SUPPLY CONNECTIONS............................................. 18
NETWORK/COMMUNICATION CABLES AND CONNECTIONS 18
ERROR CODES AND TROUBLESHOOTING.............................. 19
CALIFORNIA PROPOSITION 65 WARNING
WARNING:
This product contains chemicals known to the
State of California to cause cancer or birth
defects or other reproductive harm.
System Type 4 - Single Unit
5 - Parallel Interlock (2-8 Unit)
6 - Parallel Series Regeneration (2-8 Units)
7 - Alternating Interlock (2 Units)
8 - Alternating Delayed (2 Units)
9 - Alternating with Standby Units (2-8 Units)
14 - Demand Recall (2-8 Units)
Valve Type 2510
2750
2815
2850
2900S
2910 (Europe only)
3150
3900
Regeneration
Type
Softener/Filter Meter Delayed
Softener/Filter Meter Immediate
Time Clock
Day of the Week
Remote Regeneration
Regeneration
Flow
Downflow
Upflow
Filter
Electrical
Rating
24V DC
FEATURES
• On-screen multilingual support: English, Francais,
Deutsch, Italiano, Espanol, Nederlands, Portugues
• Time of day super capacitor backup for 12-hour power
loss
• 2 to 4 line scrolling text OLED display, high contrast easy
to read in low light conditions and at a distance
• Full functional user interface with easy programming
allowing forward and backwards menu navigation
• Network two to eight valves via shielded CAT5 cables
• LED Status Indicator
- Blue: In Service
- Flashing Blue: Regeneration Queued
- Green: Regeneration
- Flashing Green: Standby
- Red: Error condition present
• Two Programmable Auxiliary relay outputs
- Time-based
- Volume based (Chemical pump)
- Alarm-based
- Cycle-based
- Standby
• Remote input
- Remote Lockout
- Remote Regeneration
• Easy installation with plug-in wiring harnesses
• Assistance Name and Phone Number contact fields
• Error Log History
• Water Usage Daily (up to 13 weeks)
• Push Settings
• Capacitive Touch buttons
• Two Regeneration Lockout Windows
• Reset to factory default settings or from saveable custom
settings
• Full calendar display
• Master Programming Lockout
- Code-based
- Time-based
- Delayed
• Icons for easy system status identification
• Dynamic network addressing
• Diagnostics
- Real-time Flow Rate
- Peak Flow Rate (can be reset)
- Totalizer (can be reset)
- Reserve Capacity
- Use Since Last Regeneration
- Last Regeneration
- Identifiable Software Version
- Total Number of Regenerations
- Regeneration Interval
- Last Settings Change
- Error Log History
- Average Daily Usage (per weekday, 3 month history)
IMPORTANT PLEASE READ:
• The information, specications and illustrations in this manual are
based on the latest information available at the time of release. The
manufacturer reserves the right to make changes at any time without
notice.
• This manual is intended as a guide for service of the valve only. System
installation requires information from a number of suppliers not known
at the time of manufacture. This product should be installed by a
plumbing professional.
• This unit is designed to be installed on potable water systems only.
• This product must be installed in compliance with all state and
municipal plumbing and electrical codes. Permits may be required at
the time of installation.
• It is established that when daytime water pressure exceeds 80 psi
(5.5 bar), the maximum pressure rating of 125 psi (8.6 bar) can be
exceeded. A pressure regulator must be installed on this system or
warranty is voided.
• Do not install the unit where temperatures may drop below 32°F (0°C)
or above 120°F (52°C).
• Do not place the unit in direct sunlight. Black units will absorb radiant
heat, increasing internal temperatures.
• Do not strike the valve or any of the components.
• Warranty of this product extends to manufacturing defects.
Misapplication of this product may result in failure to properly condition
water, damage to product, or personal injury.
• A prelter should be used on installations in which free solids are
present.
• In some applications local municipalities treat water with Chloramines.
High Chloramine levels may damage valve components.
• Correct and constant voltage must be supplied to the controller to
maintain proper function.
• The system is intended to treat only potable quality water. It is not
intended as the permanent primary treatment of water from a source
that is contaminated, such as from radon, pesticides, insecticides,
sewage or wastewater.
• This system is not intended for use by persons (including children) with
reduced physical, sensory, or mental capabilities, or lack of experience
and knowledge, unless they have been given supervision or instruction
concerning use of the appliance by a person responsible for their
safety.
• Children shall not play with the system.
• Cleaning shall not be made by children without supervision.
• Periodic cleaning and maintenance may be required to function
properly.
• All plumbing and electrical should be done in accordance with local
codes.
• An uninterrupted power supply is required. The control uses a
transformer to supply 24 VDC. Please make sure your voltage supply is
compatible with your unit before installation.
OPERATING PARAMETERS
Minimum Pressure 20 psi/1.4 bar/138 kPa
Maximum Pressure 125 psi/8.61 bar/861 kPa
Minimum Water
Temperature
34°F/1°C
Maximum Water
Temperature
110°F/43°C
Minimum Ambient
Temperature
34°F/1°C
Maximum Ambient
Temperature
120°F/52°C
Maximum Humidity 75%
Input Voltage 100-240 VAC
Input Frequency 50/60 Hz
Output Voltage 24 VDC
Output Current 2.7 amps
Maximum Altitude 2,000 meters
Pentair Fleck NXT2 Timer • 32 • Pentair®Fleck NXT2 Timer

Display Icons
Valve State: Service
Valve State: Standby
Flow Indicator (flashing)
Regeneration
Master Unit (auto-assigned)
Network Indicator - Connected
Network Indicator - Disconnected
Network Indicator - Unit Missing
USB Connected (Field Programmer)
Error Condition Present
Remote Lock
Lock Window
Initializing
Upper Drive Movement
Lower Drive Movement
Remote Regeneration
Master Programming
User Programming
Diagnostics
Time of Day Programming
TIMER DISPLAY
System
Number
Network
Indicator
Valve
State
Flow
Indicator
Time
of Day
Master
Indicator
Status
LEDs
Display Screen
Alternates between
Date, Flow Rate, and
Volume Remaining
(If a regeneration is
queued, displays time
until regeneration)
Left Button
Press:
Navigate to previous
menu option
Press and Hold:
Enter Diagnostic menu
Blue LED
On - Unit in Service
Blinking - Regeneration Queued
Green LED
On - Unit in Regeneration
Blinking - Unit in Standby
Red LED
On - Error present
Down Button
Press:
Adjust menu value down
Press and Hold:
Enter Time of Day menu
Up Button
Press:
Adjust menu value up
Press and Hold:
Enter Time of Day menu
Left Button + Down Button
Press and Hold -
Enter Master Programming
Down Button + Up Button
Press and Hold -
Enter User Programming
Extra Cycle Button
Press:
Navigate to next
menu option
Press and Hold:
Initiate a regeneration
TIMER OPERATION
Setting the Time of Day
NOTE: Set Time of Day on any unit and the rest of the units in
the system will update the Time of Day automatically.
1. Press and hold the Up button for 2 seconds.
The "Time" value is displayed. Press the Up or Down
buttons to adjust as desired.
2. Press the Extra Cycle button to advance to the "Year" field.
Press the Up or Down buttons to adjust as desired.
3. Press the Extra Cycle button to advance to the "Month"
field. Press the Up or Down buttons to adjust as desired.
4. Press the Extra Cycle button to advance to the "Calendar
Day" field. Press the Up or Down buttons to adjust as
desired.
5. Press the Extra Cycle button to return to the normal display
screen.
NOTE: Press and hold the Left button to exit without saving.
Manually Initiating a Regeneration
1. When timer is In Service or Standby, press and hold the
Extra Cycle button on the main screen.
2. The timer advances to Regeneration Cycle Step #1, and
begins programmed time count down.
3. Press the Extra Cycle button once to advance valve to
Regeneration Cycle Step #2 (if active).
4. Press the Extra Cycle button once to advance valve to
Regeneration Cycle Step #3 (if active).
5. Press the Extra Cycle button once to advance valve to
Regeneration Cycle Step #4 (if active).
6. Press the Extra Cycle button once to advance valve to
Regeneration Cycle Step #5 (if active).
7. Press the Extra Cycle button once more to advance the
valve back to In Service.
NOTE: A manually initiated or queued regeneration can be
cleared by pressing and holding the Back button.
A system queued regeneration can only be cleared
by stepping through a manual regeneration. If
regeneration occurs for any reason prior to the
delayed regeneration time, the manual regeneration
request shall be cleared. Pressing the Extra Cycle
button while in regeneration will cause the upper
drive to advance to the next step immediately.
Timer Operation During Regeneration
In the Regeneration Cycle step display, the timer shows the
current regeneration cycle name the valve is in, or has reached,
and the time remaining in that step. Once all regeneration
steps are complete, the timer returns to In Service and
resumes normal operation.
Press the Extra Cycle button during a system
queued Regeneration Cycle to immediately
advance the valve to the next cycle step position
and resume normal step timing.
Timer Operation During Programming
The timer enters the Program Mode in Standby or Service
Mode as long as it is not in regeneration. While in the Program
Mode, the timer continues to operate normally monitoring
water usage. Timer programming is stored in memory
permanently.
Timer Operation During A Power Failure
All program settings are stored in permanent memory. Current
valve position, cycle step time elapsed, and time of day are all
stored during a power failure, and will be restored when power
is re-applied. Time is kept during a power failure, and time of
day is adjusted upon power up (as long as power is restored
within 12 hours).
NOTE: The time of day on the main display screen will flash
for 5 minutes when there has been a power outage.
The flashing of the time of day can be stopped by
pressing any button on the display.
Flow Meter Equipped Timer
As treated water is used, the Volume Remaining display counts
down from the calculated system capacity to zero. When zero
is reached, a Regeneration Cycle begins if no other units are in
regeneration.
CYCLE 1/5
BACKWASH 00:10:00
CYCLE 2/5
DRAW 00:60:00
CYCLE 3/5
RAPID RINSE 00:10:00
CYCLE 4/5
TANK REFILL 00:12:00
CYCLE 5/5
PAUSE 00:00:00
CYCLE 3/5
RAPID RINSE 00:10:00
CYCLE 4/5
TANK REFILL 00:12:00
CYCLE 5/5
PAUSE 00:00:00
CYCLE 3/5
RAPID RINSE 00:10:00
CYCLE 4/5
TANK REFILL 00:12:00
CYCLE 5/5
PAUSE 00:00:00
CYCLE 3/5
RAPID RINSE 00:10:00
CYCLE 4/5
TANK REFILL 00:12:00
CYCLE 5/5
PAUSE 00:00:00
CYCLE 3/5
RAPID RINSE 00:10:00
CYCLE 4/5
TANK REFILL 00:12:00
CYCLE 5/5
PAUSE 00:00:00
CYCLE 3/5
RAPID RINSE 00:10:00
CYCLE 4/5
TANK REFILL 00:12:00
CYCLE 5/5
PAUSE 00:00:00
CYCLE 3/5
RAPID RINSE 00:10:00
CYCLE 4/5
TANK REFILL 00:12:00
CYCLE 5/5
PAUSE 00:00:00
4 • Pentair Fleck NXT2 Timer Pentair Fleck NXT2 Timer • 5

Remote Lock
The timer does not allow the unit/system to go into
Regeneration until the Regeneration Lockout Input signal to the
unit is cleared. This requires a contact closure to activate the
unit. The recommended gauge wire is 16 AWG with a maximum
wire length run of 50 feet.
Regeneration Day Override Feature
If the Day Override option is turned on and the valve reaches
the set Regeneration Day Override value, the Regeneration
Cycle starts if no other unit is in Regeneration. If other units
are in regeneration, it is added to a regeneration queue. This
occurs regardless of the remaining volume available.
Lock Settings (access to Master Programming)
Lock Settings prevents the user from accessing Master
Programming. In Master Programming, select the desired Lock
Settings option (Off, Time Based, Delayed, or Enter Code).
Time Based - User must set clock to 12:01 pm to unlock
Delayed - User must press and hold the Left and Down buttons
for 60 continuous seconds to unlock
Enter Code - User must input code "1201" to unlock
Capacitive Buttons
Capacitive button entry warrant different consideration than
tactile button entry. Do not wear gloves. Be sure to keep
your hands and the capacitive buttons free of debris, grease,
or water. Buttons may become temporarily unresponsive if
environmental conditions change such as sudden humidity or
temperature changes. If buttons become unresponsive, wait 5
to 10 minutes for the buttons to recalibrate.
LED Status indicator
Blue - Unit in Service
Flashing Blue - Regeneration Queued
Green - Unit in Regeneration
Flashing Green - Unit in Standby
Red - Error with codes
Power Loss Backup
Time of day super capacitor backup for power loss; rated to
last minimum 12 hours
Continuous Flow Detect
Alert appears when specified continuous flow rate is detected
during service over a specified duration. Continuous flow rate
is adjustable from 0.1 to 99999.9 GPM/LPM (accuracy of flow
rate detected will vary based on capability of meter). Duration
range is adjustable from 1 to 255 hours.
Remote Regeneration
Ability to trigger a regeneration via a remote input.
TIMER FEATURES
Regeneration Types
Softener/Filter Meter Delayed - When volume remaining
reaches zero and the scheduled regeneration time is reached
(default 2 a.m. softener; 12 a.m. filter), the unit will regenerate.
Softener/Filter Meter Immediate - When volume remaining
reaches zero, the unit will regenerate.
Time Clock - Once days remaining reaches zero the unit will
regenerate at the selected regeneration time (default 2 a.m.
softener; 12 a.m. filter).
Day of the Week - Once selected day of the week is reached it
will regenerate at the selected regeneration time.
Remote Regeneration - Remote Regeneration is accomplished
by a 3rd party device completing a contact closure connected to
the remote regeneration input connector. The 3rd party device
must complete the signal duration time that was set in the
duration signal time in programming to start a regeneration.
You can set the remote regeneration for immediate
regeneration or delayed regeneration at the set time that was
programmed for regeneration time in programming.
Reset to Factory Defaults
While powering up the unit, when the Pentair logo appears,
press and hold the Extra Cycle button to access the Reset
menu then select Reset to Factory Defaults. Press the Extra
Cycle Button to confirm your selection and to advance to the
service screen. Furthermore, you may select
Reset to Non-Factory Defaults to save a set of unique control
parameters.
RESET
PRESS & HOLD
BACK
RESET TO FACTORY DEFAULTS
RESET TO NON-FACTORY DEFAULTS
END
Power on the unit.
When Pentair logo appears,
press and hold the Extra Cycle button.
The Reset menu appears.
Use the up/down buttons to select.
Press the Extra Cycle button to set the
desired option and return to the
Service screen.
Lock Window
Lock Window prevents the unit from regenerating during a
specified time frame. Two lock windows are available (Lock
Window #1 and Lock Window #2). In Master Programming,
enable a Lock Window then select the desired Lock Start time
and Lock End time.
Settings Review
To prevent unintentional changes to Master Programming,
enable Settings Review to view and navigate through Master
Programming settings without the ability to edit.
Auxiliary Relays
The NXT2 has two auxiliary relays that may be activated based
on cycle, time, or volume.
Activates during selected cycle step
Activates upon selected start time
(Range: 0-91 minutes)
Deactivates upon selected end time
(Range: Start Time plus 1 minute)
Activates when selected volume (gallon)
is reached (Range: 0-99999)
Selected duration in seconds
(Range: 0-9999 seconds)
AUX.1: CYCLE BASED
SP BW BD RR RF SB
AUX.1:TIME BASED-START TIME #1
1 M
AUX.1:TIME BASED-END TIME #1
5 M
AUX.1:VOLUME BASED - VOLUME-G
00100
AUX.1:VOLUME BASED - DURATION-S
0010
TIMER FEATURES continued...
Push Settings
The ability to transmit user settings from one unit to all other
connected units. Select the desired Master Programming
settings on one unit then push the same settings to all other
connected units. After the push settings have completed, you
may still make unique changes to individual units.
6 • Pentair Fleck NXT2 Timer Pentair Fleck NXT2 Timer • 7

Example:
On: View settings without the ability to alter settings.
Off: User has ability to alter settings.
OFF
ON SETTINGS REVIEW
Example:
English, Francais, Duetsch, Italiano,
Espanol, Nederlandse, Portugues
ENGLISH
FRANCAIS
PORTUGUES
LANGUAGE
Example:
12 characters maximum.
ASSISTANCE NAME 1
Example:
12 characters maximum.
ASSISTANCE NAME 2
Example:
14 characters maximum.
ASSISTANCE PHONE
Example:
4, 5, 6, 7, 8, 9, 14
SYSTEM 5
SYSTEM 6
SYSTEM 4SYSTEM
Example:
2510, 2750, 2815, 2900, 3150, 3900
2850
2900
2815 VALVE
Example:
Upflow
Downflow
Filter
DOWNFLOW
FILTER
UPFLOW
REGEN. FLOW
Example:
Softener Meter Delayed
Softener Meter Immediate
Time Clock
Day of the Week.
SOFTENER METER IMM
TIME CLOCK
SOFTENER METER DEL
REGEN. TYPE
Example:
Metric
US
US
METRIC UNITS
Example:
Range: 0-9,999,999 grains
0023828
CAPACITY - GRAINS
Example:
Range: 0-199 GPG
Example:
Fixed Volume
Weekly Reserve
Variable Reserve
Fixed %
WEEKLY RESERVE
VARIABLE RESERVE
FIXED VOLUME
RESERVE
Example:
Off, Immediate, Delayed
OFF
IMMEDIATE
DELAYED
REMOTE REGENERATION
Example:
Range:
1-9999 seconds
1 S
REMOTE SIGNAL DURATION
Example:
Range: Off - 99 Days
10 D
DAY OVERRIDE/TIME-DRIVEN
Example:
Range: 0 - 23 Hours 59 Minutes.
Example:
Start Lock Window
End Lock Window
02:OOHR
REGEN. TIME
OFF
ON LOCK WINDOW #1
Example:
Range: 0 - 240 M
10 M
BACKWASH
Example:
Range: 0 - 240 M
60 M
DRAW
Example:
Range: 0 - 240 M
10 M
RAPID RINSE
Example:
Range: 0 - 240 M
12 M
TANK REFILL
Example:
Range: 0 - 240 M
Example:
Range: 0.1 to 999.9 gpm/Lpm
0 M
PAUSE
Example:
Paddle (0.75”, 1”, 1.5”, 2”, 3”)
Turbine (0.75”, 1.25”, 1.5”)
Generic
1.00” PADDLE
1.00” TURBINE
0.75” TURBINE
METER TYPE
OFF
ON
CONTINUOUS FLOW DETECT
Example:
Off, Alarm Based, Cycle Based, Time Based,
Volume Based, Standby
OFF
ALARM BASED
STANDBY
AUXILIARY 1
Example:
Off, Alarm Based, Cycle Based, Time Based,
Volume Based, Standby
OFF
ALARM BASED
STANDBY
AUXILIARY 2
OFF
ON
SAVE AS NON-FACTORY
Example:
Off, Delayed, Enter Code, Time Based
OFF
DELAYED
TIME BASED
LOCK SETTINGS
025
HARDNESS - GPG
Example:
2, 3, 4, 5, 6, 7, 8
2
8
3NUMBER OF TANKS
Example:
Trip Points only available/visible when
System Type 14 is selected.
0001
TRIP POINT #1 - GPM
1 S
TRIP POINT #1 - SERVICE DURATION
60 S
TRIP POINT #1 - STANDBY DURATION
Example:
Range: 1-90 seconds
Example:
Range: 60-300 seconds
ON
OFF PUSH SETTINGS
END
MASTER PROGRAMMING MODE
FLOW CHART
CAUTION
Before entering Master Programming, please
contact your local professional water dealer.
NOTE: Depending on current option settings, some values
cannot be viewed or set.
Master Programming Mode
1. Press and hold the Left and Down buttons simultaneously
for 3 seconds to enter Master Programming mode.
2. To navigate, press the Extra Cycle button to advance to the
next value. Press the Left button to retreat to the previous
value.
3. Where applicable, use the Down and Up buttons to adjust
a value as desired. When entering data into text fields
(such as Assistance Name) or numerical fields (such as
Hardness), press the Extra Cycle button to advance to the
next character/digit and press the Left button to retreat to
the previous character/digit. Proceed through all available
characters/digits to advance to the next value.
4. To reset/clear a value (such as Assistance Name), while
on the value, press and hold the Down and Up buttons
simultaneously for 5 seconds.
5. To exit Master Programming Mode, progress through all
available values or after 5 minutes of inactivity the timer
will exit automatically. To exit master programming without
saving changes, press the Left button until you return to
the service screen.
6. Depending on the current controller programming, certain
values may not be able to be viewed or set.
7. The timer will display local information, not system
information.
8. In the event of a regeneration occurring while displaying
master programming, the regeneration step and time
remaining will be displayed. When regeneration has been
completed, the display will return to the main screen.
System 4 - Single Unit
Single Tank configurationTime Clock: No MeterImmediate: One
MeterDelayed: One MeterRemote Signal Start
System 5 (2-8 Units) Parallel Interlock)
All tanks in parallel supplying treated water. Each unit in the
system will have its own flow meter/sensor input. The control
will delay the start of Regeneration if another unit is already
in Regeneration. Once that unit has completed a Regeneration
cycle, and has returned to Service, the unit with the longest
regeneration queue time will begin Regeneration. No more
than one unit will be in Regeneration at at time.
System 6 (2-8 Units) Parallel Series Regeneration
All tanks in parallel supplying treated water. Only #1 control
will monitor flow meter/sensor input. When a regeneration is
required for the system, it will regenerate valve address #1
first, immediately followed by #2, then #3, then #4 if installed.
No more than one unit will be in Regeneration at a time.
System 7 (2 Units) Alternating Immediate
One tank online supplying treated water, one tank in Standby.
Only #1 control will monitor its flow meter/sensor input.
Regeneration of a unit will begin after the other control has left
Standby and returned to Service. When the Regeneration cycle
is complete, the regenerated unit will enter Standby. Standby
on each tank is controlled by the relay on the NXT2 circuit
board.
System 8 (2 Units) Alternating Delayed
Immediate Transfer Delayed RegenerationOne tank online
supplying treated water, one tank in Standby. Only #1 control
will monitor its flow meter/sensor input. Online unit depletes
its volume. Once this occurs the offline unit comes online. The
previously online unit goes offline and delays its regeneration
until the programmed regeneration time has been reached.
System 9 (2-8 Units) Alternating with Standby
Units
Up to 7 tanks online supplying treated water, one tank
in Standby. Meter/sensor input is required on each tank.
Regeneration of a unit will begin after the other control has left
Standby and returned to Service. When the Regeneration cycle
is complete, the regenerated unit will enter Standby. Standby
on each tank is controlled by the relay on the NXT2 circuit
board.
System 14 (2-8 Units) Demand Recall
Meter input is required on each tank. Unit #1 will begin In
Service with #2, #3, and #4 (if installed) will begin in Standby.
At least one unit is In Service at all times. When flow rate to the
Primary Service Unit increases to a user specified rate, the
next unit in sequence will move from Standby to Service. As
the flow rate falls below the user specified rate, subsequent
tanks will return to Standby. When the Primary Service Unit
regenerates, the next unit in sequence will become the new
Primary Service Unit. As each units capacity is reached, the
controller will initiate a Regeneration of that unit. Depending
on the number of units in the system and flow rate demand,
the regenerated unit will then be placed either into Standby or
Service. Only one unit will be in Regeneration at a time.
8 • Pentair Fleck NXT2 Timer Pentair Fleck NXT2 Timer • 9

MASTER PROGRAMMING MODE
FLOW CHART continued...
Example:
On: View settings without the ability to alter settings.
Off: User has ability to alter settings.
OFF
ON SETTINGS REVIEW
Example:
English, Francais, Duetsch, Italiano,
Espanol, Nederlandse, Portugues
ENGLISH
FRANCAIS
PORTUGUES
LANGUAGE
Example:
12 characters maximum.
ASSISTANCE NAME 1
Example:
12 characters maximum.
ASSISTANCE NAME 2
Example:
14 characters maximum.
ASSISTANCE PHONE
Example:
4, 5, 6, 7, 8, 9, 14
SYSTEM 5
SYSTEM 6
SYSTEM 4SYSTEM
Example:
2510, 2750, 2815, 2900, 3150, 3900
2850
2900
2815 VALVE
Example:
Upflow
Downflow
Filter
DOWNFLOW
FILTER
UPFLOW
REGEN. FLOW
Example:
Softener Meter Delayed
Softener Meter Immediate
Time Clock
Day of the Week.
SOFTENER METER IMM
TIME CLOCK
SOFTENER METER DEL
REGEN. TYPE
Example:
Metric
US
US
METRIC UNITS
Example:
Range: 0-9,999,999 grains
0023828
CAPACITY - GRAINS
Example:
Range: 0-199 GPG
Example:
Fixed Volume
Weekly Reserve
Variable Reserve
Fixed %
WEEKLY RESERVE
VARIABLE RESERVE
FIXED VOLUME
RESERVE
Example:
Off, Immediate, Delayed
OFF
IMMEDIATE
DELAYED
REMOTE REGENERATION
Example:
Range:
1-9999 seconds
1 S
REMOTE SIGNAL DURATION
Example:
Range: Off - 99 Days
10 D
DAY OVERRIDE/TIME-DRIVEN
Example:
Range: 0 - 23 Hours 59 Minutes.
Example:
Start Lock Window
End Lock Window
02:OOHR
REGEN. TIME
OFF
ON LOCK WINDOW #1
Example:
Range: 0 - 240 M
10 M
BACKWASH
Example:
Range: 0 - 240 M
60 M
DRAW
Example:
Range: 0 - 240 M
10 M
RAPID RINSE
Example:
Range: 0 - 240 M
12 M
TANK REFILL
Example:
Range: 0 - 240 M
Example:
Range: 0.1 to 999.9 gpm/Lpm
0 M
PAUSE
Example:
Paddle (0.75”, 1”, 1.5”, 2”, 3”)
Turbine (0.75”, 1.25”, 1.5”)
Generic
1.00” PADDLE
1.00” TURBINE
0.75” TURBINE
METER TYPE
OFF
ON
CONTINUOUS FLOW DETECT
Example:
Off, Alarm Based, Cycle Based, Time Based,
Volume Based, Standby
OFF
ALARM BASED
STANDBY
AUXILIARY 1
Example:
Off, Alarm Based, Cycle Based, Time Based,
Volume Based, Standby
OFF
ALARM BASED
STANDBY
AUXILIARY 2
OFF
ON
SAVE AS NON-FACTORY
Example:
Off, Delayed, Enter Code, Time Based
OFF
DELAYED
TIME BASED
LOCK SETTINGS
025
HARDNESS - GPG
Example:
2, 3, 4, 5, 6, 7, 8
2
8
3NUMBER OF TANKS
Example:
Trip Points only available/visible when
System Type 14 is selected.
0001
TRIP POINT #1 - GPM
1 S
TRIP POINT #1 - SERVICE DURATION
60 S
TRIP POINT #1 - STANDBY DURATION
Example:
Range: 1-90 seconds
Example:
Range: 60-300 seconds
ON
OFF PUSH SETTINGS
END
USER PROGRAMMING MODE
FLOW CHART
User Programming Mode
1. Press and hold the Down and Up buttons simultaneously for
3 seconds to enter the User Programming mode.
2. To navigate the menu, press the Extra Cycle button to
advance to the next value. Press the Left button to retreat to
the previous value.
3. Where applicable, use the Up and Down buttons to adjust a
value as desired.
4. After progressing through all available values, the timer
will return to Normal operation.
5. To exit diagnostic mode, progress through all cycles, or
press & hold Left button at any time, or simply wait 5
minutes and timer will automatically return to normal
operation.
6. Depending on the current controller settings, certain values
may not be able to be viewed or set.
7. The timer will display local information, not system
information.
8. In the event of a regeneration occurring while displaying
user programming, the regeneration step and time
remaining will be displayed. When regeneration has been
completed, the display will return to the main screen.
END
Example:
Range: Off - 99 Days
10 D
DAY OVERRIDE/TIME-DRIVEN
Example:
Range: 0 - 23 Hours 59 Minutes.
02:OOHR
REGEN. TIME
Example:
Range: 1 - 999 grains per gallon
025
HARDNESS - GPG
Example:
Range: 1 - 99999 gallons
09999
VOLUME REMAINING - G
DIAGNOSTIC PROGRAMMING MODE
FLOW CHART
Diagnostic Programming Mode
1. Press and hold the Left button to enter Diagnostic
Programming mode.
2. To navigate, press the Extra Cycle button to advance to the
next value. Press the Left button to retreat to the previous
value.
3. Where applicable, use the Up and Down buttons to adjust a
value as desired.
4. To reset/clear a value (such as Totalizer or Error Log),
while on the value, press and hold the Up and Down buttons
simultaneously.
5. After progressing through all available values, the timer
will return to normal operation.
6. To exit diagnostic mode, press and hold the Left button at
anytime or after 5 minutes of inactivity the timer will return
to normal operation automatically.
7. Depending on the current controller programming, certain
values may not be able to be viewed or modified.
8. The timer will display local information, not system
information.
9. In the event of a regeneration occurring while displaying
diagnostics, the regeneration step and time remaining will
be displayed. When regeneration has been completed, the
display will return to the main screen.
Example:
Real-time flow rate reading.
FLOW RATE
29.7 GPM
Example:
Peak flow since last regeneration.
PEAK FLOW
30.1 GPM
Example:
Gallons at the outlet since installation.
TOTALIZER
482474 G
Example:
Reserve Capacity setting.
RESERVE
1588 G
Example:
Gallons at the outlet since last regeneration.
USE SINCE REGEN
7331 G
Example:
Time since last regeneration.
LAST REGEN.
4 H
Example:
Installed software version.
SOFTWARE VERSION
13026
Example:
Total number of regenerations since installation.
NO. OF REGENS
32
Example:
Duration between regenerations.
REGEN INTERVAL
3 D 21 H
Example:
Last time programming settings were changed.
LAST SETTINGS CHANGE
14 H 0 M
Example:
Record of error events chronologically.
ERROR LOG
ERROR LOG EMPTY
SUN-DAILY USAGE
2017-10-10 0 G
2017-01-02 0 G
2017-12-26 0 G
Example:
Average usage from past Sunday.
SUN-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Sundays.
MON-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from past Monday.
MON-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Mondays.
TUE-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Tuesday.
TUE-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Tuesdays.
WED-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Wednesday.
WED-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Wednesdays.
THU-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Thursday.
THU-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Thursdays.
FRI-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Friday.
FRI-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Fridays.
SAT-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Saturdays
SAT-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Saturdays.
END
Example:
Real-time flow rate reading.
FLOW RATE
29.7 GPM
Example:
Peak flow since last regeneration.
PEAK FLOW
30.1 GPM
Example:
Gallons at the outlet since installation.
TOTALIZER
482474 G
Example:
Reserve Capacity setting.
RESERVE
1588 G
Example:
Gallons at the outlet since last regeneration.
USE SINCE REGEN
7331 G
Example:
Time since last regeneration.
LAST REGEN.
4 H
Example:
Installed software version.
SOFTWARE VERSION
13026
Example:
Total number of regenerations since installation.
NO. OF REGENS
32
Example:
Duration between regenerations.
REGEN INTERVAL
3 D 21 H
Example:
Last time programming settings were changed.
LAST SETTINGS CHANGE
14 H 0 M
Example:
Record of error events chronologically.
ERROR LOG
ERROR LOG EMPTY
SUN-DAILY USAGE
2017-10-10 0 G
2017-01-02 0 G
2017-12-26 0 G
Example:
Average usage from past Sunday.
SUN-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Sundays.
MON-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from past Monday.
MON-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Mondays.
TUE-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Tuesday.
TUE-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Tuesdays.
WED-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Wednesday.
WED-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Wednesdays.
THU-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Thursday.
THU-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Thursdays.
FRI-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Friday.
FRI-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Fridays.
SAT-DAILY USAGE
2016-10-10 0 G
2017-01-02 0 G
2016-12-26 0 G
Example:
Average usage from last Saturdays
SAT-AVERAGE USAGE
29.7 G
Example:
Average usage from past 3 Saturdays.
END
10 • Pentair Fleck NXT2 Timer Pentair Fleck NXT2 Timer • 11

TIME OF DAY PROGRAMMING MODE
FLOW CHART
Setting the Time of Day
NOTE: Set Time of Day on any unit and the rest of the units in
the system will update the Time of Day automatically.
1. Press and hold the Up button for 2 seconds.
The "Time" value is displayed. Press the Up or Down
buttons to adjust as desired.
2. Press the Extra Cycle button to advance to the "Year" field.
Press the Up or Down buttons to adjust as desired.
3. Press the Extra Cycle button to advance to the "Month"
field. Press the Up or Down buttons to adjust as desired.
4. Press the Extra Cycle button to advance to the "Calendar
Day" field. Press the Up or Down buttons to adjust as
desired.
5. Press the Extra Cycle button to return to the normal display
screen.
NOTE: Press and hold the Left button to exit without saving.
END
Example:
12 or 24 hour formats available
11:00AM
TIME
Example:
Set current year
2018
YEAR
Example:
Set current month
JAN
MONTH
Example:
Set current day
22
CALENDAR DAY
US Metric
Settings Review x x x x x x x x x x
Language x x x x x x x x x x
Assistance Name 1, 2 x x x x x x x x x x
Assistance Phone x x x x x x x x x x
Regen Type x x x x x x x x x x
Valve x x x x x x x x x x
Regen Flow x x x x x x x x x x
Units x x x x x x x x x x
Remote Regeneration x x x x x x x x x x
Auxilliary 1,2 x x x x x x x x x x
Lock Window 1,2 x x x x x x x x x x
Meter Type x x x x x x x x
Continuous Flow Detect x x x x x x x x
Save as Non Factory x x x x x x x x x x
Lock Settings x x x x x x x x x x
Day Override/Time Driven x x x x x x x x x
Regen Time x x x x x
Day of the Week x x
Capacity x x x x x x x x 0-9,999,999 Grains 0-9,999,999 Grams, 0-560,287 Lx°DH, 0-1,000,000 Lx°FTH, 0-701,557 Lx°EH
Hardness x x x x x x x x 0-199 GPG 0-19,999 mg/L, 0-1,402 °EH, 0-199.9 °FTH, 0-112 °DH
International Hardness Units
x x x x x x x x
Reserve x x Number of Tanks (Max) 1 1 1 1 8 8 2 2 8 8
Push Settings x x x x x x
Trip Point #1-7 GPM x 0-1,999 GPM 0-7,569 LPM
Trip Point #1-7 SD x
Trip Point #1-7 STBD x
Weekly Reserve, Variable Reserve, Fixed %, Fixed Volume
2, 3, 4, 5, 6, 7, 8
On, Off
1-90s
60-300s
mg/L, °EH, °FTH, °DH
US, Metric
Off, Immediate, Delayed
Off,
Alarm Based,
Cycle Based,
Time Based,
On, Off
Paddle (0.75", 1", 1.5", 2", 3")
Turbine (0.75", 1.25", 1.5")
Generic
On, Off
On, Off
Off, Delayed, Enter Code, Time Based
Off-99 Days
Any
SU, MO, TU, WE, TH, FR, SA
Upflow, Downflow, Filter
Series Alternating Alternating Alternating Demand Recall
On, Off
English
Francais
Deutsch
Italiano
Espanol
Nederlands
Portugues
Custom
Custom
Time Clock
Day of the Week
Softener/Filter Metered Immediate
Softener/Filter Metered Delayed
2510
2750 2815 2850 2900 3150 3900
Interlock
NXT2 Programming Parameters and Ranges
System Type 4 5 6 7 8 9 14
Programming Parameter Ranges
Regen Type Time Clock Day of the
Week
Softener/Filter
Metered
Immediate
Softener/Filter
Metered Delayed
12 • Pentair Fleck NXT2 Timer Pentair Fleck NXT2 Timer • 13

Item No. QTY Part No. Description
1.................1........ 62115 .................Timer Assy, NXT2
Service Assemblies
2.................1........ 62120 .................Control Panel Assy, NXT2, Programmed
3.................1........ 40941 .................Wire Harness, Upper Drive
Item No. QTY Part No. Description
1.................1........ 62115-01............Timer Assy, NXT2, 2815
Service Assemblies
2.................1........ 62120 .................Control Panel Assy, NXT2, Programmed
3.................1........ 44076 .................Wire Harness, Upper Drive
NXT2 TIMER ASSEMBLY
(2510, 2750, 2850, 2900, 3150, 3900 VALVES)
NXT2 TIMER ASSEMBLY
(2815 VALVE)
1
2
3
1
2
3
62115 Rev A
62115-01 Rev A
14 • Pentair Fleck NXT2 Timer Pentair Fleck NXT2 Timer • 15

Item No. QTY Part No. Description
1........ 62121-01............Conversion Kit, NXT2, US
1........ 62121-02............Conversion Kit, NXT2, Euro
1........ 62121-03............Conversion Kit, NXT2, Aust
1........ 62121-04............Conversion Kit, NXT2, Japan
NOTE: All Conversion Kits include timer wire harness (not pictured),
and appropriate power supply plug end (also not pictured
NXT TO NXT2 CONVERSION KITS
62121 Rev A
NXT2 WIRING DIAGRAM
VDM
VDM
IMPORTANT: DO NOT USE P18 TO POWER NON-PENTAIR DEVICES; USE AUX1 & AUX2 INSTEAD
44334 Rev B
16 • Pentair Fleck NXT2 Timer Pentair Fleck NXT2 Timer • 17

44404 Rev A
44403 Rev A
POWER SUPPLY CONNECTIONS
2510/2750/2815/2850/2900 Valves:
3150/3900 Valves:
Installing the Power Supply:
NOTE: Power Supply includes a harness with 2 black wires
that connect to circuit board, see page 15.
1. Insert black and black transformer wires into 24VDC input
of control.
Communication Cables
Hinge Mount: mount per valve model noted
Meter Cable
Power Supply
Wire Harness
Communication Cables
Power Supply
Meter Cable
Wire Harness
Hinge Mount: mount per valve model noted
NETWORK/COMMUNICATION CABLES
AND CONNECTIONS
Use a shielded CAT5 Network/Communication cable.
Connect the network/communication cable first before
programming.
Cable length between timers/units should not exceed 25 feet.
Connect each unit in series (do not form a loop) together from
one communication port to the next communication port. It
does not matter which one goes to the next one.
ERROR CODES AND TROUBLESHOOTING
Detected Errors
If a communication error is detected, an Error Screen will
appear.
• All units In Service remain in the In Service position.
• All units in Standby go to In Service.
• Any unit in Regeneration when the error occurs
completes Regeneration and goes to In Service.
• No units are allowed to start a Regeneration Cycle while
the error condition exists, unless they are manually forced
into Regeneration.
• When an error is corrected and the error no longer
displays (it may take several seconds for all of the units
in a system to stop displaying the error message), the
system returns to normal operation.
NOTE: During the error condition, the control continues
to monitor the flow meter and update the volume
remaining. Once the error condition is corrected, all
units return to the operating status they were in prior
to the error. Regeneration queue is rebuilt according
to the normal system operation. Or, if more than
one unit has been queued for regeneration, then the
queue is rebuilt according to which one communicates
first.
Message Displayed Cause For Error Correction
Error
Valve Count Mismatch
Number of NXT2 detected does not match selected system
type in Master Programming
Push correct valve settings in Master
Settings
Motor Stall
No Changes Detected in the Optical
Sensor for 6 Seconds
The motor is on but no encoder pulses are detected within a
given duration while homing.
Check the P11 connection and trigger a
manual regeneration.
Motor Run-On
No CAM Switch Change Detected
The motor is on but no encloder pulses are detected or CAM
Switches change state within a given duration.
Verify correct valve type is chosen. Trigger a
manual regeneration.
Optical Sensor
Undesired change detected by the
Optical Sensor
The motor is off but additional encoder pulses are detected. Trigger a manual regeneration.
Over-Current
Motor Over-Current is Detected Motor current exceeds thresholds. Trigger a manual regeneration.
Flow Meter Error
Continuous Flow Detected Flow exceeded specified threshold for a specific duration. Trigger a manual regeneration.
Error
Send/Receive Failure During a setting push, a packet was missing. Reconnect communication cables and push setting in Master Settings.
Error
System Type Mismatch on Network The system type among connected units does not match. Push correct system settings in Master Settings.
Microcontroller Error Calibration or manufacturing test was not performed Contact your Pentair representative.
100 Days Without Regen 100 Days have expired without a regeneration Trigger a manual regeneration
18 • Pentair Fleck NXT2 Timer Pentair Fleck NXT2 Timer • 19