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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
(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
ERROR CODES AND TROUBLESHOOTING .............................. 19
CALIFORNIA PROPOSITION 65 WARNING
This product contains chemicals known to the
WARNING:
State of California to cause cancer or birth
defects or other reproductive harm.
Fleck NXT2 Timer
2 • Pentair
®
IMPORTANT PLEASE READ:
• The information, specifications 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 prefilter 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
34°F/1°C
Temperature
Maximum Water
110°F/43°C
Temperature
Minimum Ambient
34°F/1°C
Temperature
Maximum Ambient
120°F/52°C
Temperature
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
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
Softener/Filter Meter Delayed
Type
Softener/Filter Meter Immediate
Time Clock
Day of the Week
Remote Regeneration
Regeneration
Downflow
Flow
Upflow
Filter
Electrical
24V DC
Rating
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)
Pentair Fleck NXT2 Timer • 3
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