Pentair FLECK 2850 SXT User guide

FLECK
2850 SXT
INSTALLER
MANUAL
WATER PURIFICATION

Installer manual Fleck 2850 SXT - Table of Contents
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Table of Contents
1 Generalities..................................................................................... 7
1.1 Scope of the documentation ....................................................................... 7
1.2 Release management ................................................................................. 7
1.3 Manufacturer identifier, product ................................................................ 7
1.4 Intended use................................................................................................ 8
1.5 Abbreviations used...................................................................................... 8
1.6 Norms.......................................................................................................... 8
1.6.1 Applicable norms ................................................................................................ 8
1.6.2 Available certificates........................................................................................... 9
1.7 Procedure for technical support................................................................. 9
1.8 Copyright and Trademarks ......................................................................... 9
1.9 Limitation of liability.................................................................................... 10
1.10 Scan & Service application.......................................................................... 11
2 Safety .............................................................................................. 12
2.1 Safety pictograms definition ....................................................................... 12
2.2 Serial label location..................................................................................... 13
2.3 Hazards........................................................................................................ 13
2.3.1 Personnel ............................................................................................................ 13
2.3.2 Material ............................................................................................................... 14
2.4 Hygiene and sanitization ............................................................................. 14
2.4.1 Sanitary issues .................................................................................................... 14
2.4.2 Hygiene measures............................................................................................... 14
3 Description ...................................................................................... 15
3.1 Technical specifications .............................................................................. 15
3.2 Performance flow rate characteristics....................................................... 17
3.3 Outline drawing ........................................................................................... 18
3.4 Components description and location ........................................................ 19
3.5 System regeneration cycle.......................................................................... 21
3.5.1 Downflow regeneration cycle (5-cycles operation) ............................................ 21
3.5.2 Filter cycle (3-cycles operation) ......................................................................... 23
3.6 Configurations for softener, no by pass and filter...................................... 25
3.6.1 Downflow softener .............................................................................................. 25
3.6.2 No by pass configuration..................................................................................... 25
3.6.3 Automatic filter ................................................................................................... 26
4 System sizing................................................................................... 27
4.1 Recommended Injector/DLFC/BLFC-Valve configuration ......................... 27

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4.2 Sizing a softener (single unit) ..................................................................... 27
4.2.1 Parameters to be considered ............................................................................. 27
4.2.2 Determining the required volume of resin ......................................................... 28
4.2.3 Resin exchange capacity and capacity of the unit .............................................. 29
4.2.4 Valve configuration.............................................................................................. 30
4.2.5 Cycle time calculation......................................................................................... 31
4.3 Salt amount definition ................................................................................. 33
4.4 Injector flow rates ....................................................................................... 33
4.4.1 1600 injectors ...................................................................................................... 34
4.4.2 1650 injectors ...................................................................................................... 35
4.4.3 1700/1710 injectors ............................................................................................. 36
5 Installation ...................................................................................... 37
5.1 Warnings...................................................................................................... 37
5.2 Safety notices for installation ..................................................................... 37
5.3 Installation environement ........................................................................... 37
5.3.1 General ................................................................................................................ 37
5.3.2 Water ................................................................................................................... 38
5.3.3 Electrical ............................................................................................................. 38
5.3.4 Mechanical .......................................................................................................... 39
5.4 Integration constraints................................................................................ 39
5.5 Valve connection to piping........................................................................... 40
5.5.1 Top-mounted valve installation .......................................................................... 40
5.5.2 Side-mounted valve installation ......................................................................... 42
5.6 Block diagram and configuration example................................................. 43
5.7 Electrical connections................................................................................. 45
5.8 Bypassing .................................................................................................... 46
5.9 Drain line connection .................................................................................. 46
5.10 Overflow line connection............................................................................. 47
5.11 Brine line connection .................................................................................. 48
6 Programming .................................................................................. 49
6.1 Display ......................................................................................................... 49
6.2 Commands .................................................................................................. 51
6.3 Setting the time of the day (TD)................................................................... 51
6.4 Basic programming..................................................................................... 51
6.4.1 Basic programming mode chart......................................................................... 51
6.4.2 Day of override (DO) ............................................................................................ 52
6.4.3 Regeneration time (RT) ....................................................................................... 52
6.4.4 Feed water hardness (H)..................................................................................... 52
6.4.5 Reserve capacity (RC) or (SF).............................................................................. 52
6.4.6 Current day of the week (CD).............................................................................. 52
6.5 Master programming mode........................................................................ 52

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6.5.1 Master programming mode chart ...................................................................... 53
6.5.2 Entering master programming mode................................................................. 54
6.5.3 Display format mode (DF) ................................................................................... 55
6.5.4 Regeneration flow (RF) ....................................................................................... 55
6.5.5 Regeneration control type(CT) ........................................................................... 55
6.5.6 Number of tanks (NT).......................................................................................... 56
6.5.7 Tank in service (TS) ............................................................................................. 56
6.5.8 Unit capacity (C)................................................................................................... 56
6.5.9 Feedwater hardness (H)...................................................................................... 57
6.5.10 Reserve selection (RS) ........................................................................................ 57
6.5.11 Days override (DO)............................................................................................... 58
6.5.12 Regeneration time (RT) ....................................................................................... 58
6.5.13 Regeneration cycle step duration....................................................................... 59
6.5.14 Day of week (Dn, n=1 to7) ................................................................................. 59
6.5.15 Current day (CD).................................................................................................. 59
6.5.16 Flow meter type (FM) .......................................................................................... 60
6.5.17 Meter pulse (K).................................................................................................... 61
6.6 Filter programming..................................................................................... 61
6.7 Diagnostic.................................................................................................... 61
6.7.1 Commands .......................................................................................................... 61
6.7.2 Current flow rate (FR) ......................................................................................... 61
6.7.3 Peak flow rate (PF).............................................................................................. 61
6.7.4 Hours since last regeneration (HR) .................................................................... 62
6.7.5 Volume since last regeneration (VU) .................................................................. 62
6.7.6 Reserve capacity (RC) ......................................................................................... 62
6.7.7 Software version (SV) .......................................................................................... 63
6.8 Resetting the controller .............................................................................. 63
6.8.1 Soft reset (SR) ..................................................................................................... 63
6.8.2 Hard reset (HR) ................................................................................................... 63
7 Commissioning................................................................................ 64
7.1 Water filling, draining and waterproofness inspection .............................. 64
7.2 Sanitization .................................................................................................. 65
7.2.1 Disinfection of water softeners........................................................................... 65
7.2.2 Sodium or calcium hypochlorite ......................................................................... 65
7.2.3 Electro chlorination............................................................................................. 66
8 Operation......................................................................................... 67
8.1 Display ......................................................................................................... 67
8.1.1 Display during operation..................................................................................... 67
8.1.2 Display during regeneration ............................................................................... 67
8.2 Recommendations ...................................................................................... 68
8.3 Manual regeneration................................................................................... 68
8.3.1 Manual delayed regeneration ............................................................................. 68
8.3.2 Immediate regeneration ..................................................................................... 68
8.3.3 To advance regeneration cycles ......................................................................... 68
9 Maintenance .................................................................................... 69

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9.1 General system inspection.......................................................................... 69
9.1.1 Water quality ....................................................................................................... 69
9.1.2 Mechanical Checks ............................................................................................. 69
9.1.3 Regeneration test................................................................................................ 70
9.2 Recommended maintenance plan .............................................................. 71
9.2.1 Valve used for softening...................................................................................... 71
9.2.2 Valve used for filtration....................................................................................... 73
9.3 Recommendations ...................................................................................... 74
9.3.1 Use original spare parts...................................................................................... 74
9.3.2 Use original approved lubricants........................................................................ 74
9.3.3 Maintenance instructions ................................................................................... 74
9.4 Cleaning and maintenance.......................................................................... 74
9.4.1 First steps............................................................................................................ 74
9.4.2 Power head and/or motor replacement ............................................................. 75
9.4.3 Controller replacement ...................................................................................... 76
9.4.4 Piston and/or seal and spacer kit replacement ................................................. 77
9.4.5 Micro-switches replacement .............................................................................. 79
9.4.6 Cams replacement.............................................................................................. 81
9.4.7 Injector cleaning.................................................................................................. 82
9.4.8 BLFC cleaning ..................................................................................................... 83
9.4.9 DLFC cleaning ..................................................................................................... 84
9.4.10 Valve on tank assembly....................................................................................... 85
10 Troubleshooting .............................................................................. 86
10.1 Error detection ............................................................................................ 89
10.1.1 Motor stall/cam sense error............................................................................... 89
10.1.2 Motor run-ON error/cycle sense error............................................................... 90
10.1.3 Regeneration failure ........................................................................................... 90
10.1.4 Memory error ...................................................................................................... 91
11 Spare parts and options................................................................... 92
11.1 Valve parts list............................................................................................. 92
11.2 Power head parts list .................................................................................. 94
11.3 Injector parts list ......................................................................................... 95
11.3.1 1600/1650 injector parts list ............................................................................... 95
11.3.2 1700/1710 injector parts list ............................................................................... 96
11.4 Brine valve parts list ................................................................................... 97
11.5 Safety brine valves list ................................................................................ 99
11.6 Safety brine valves 2310 parts list .............................................................. 99
11.7 Distribution systems parts list.................................................................... 100
11.8 Air checks list .............................................................................................. 101
11.9 Meters parts list .......................................................................................... 101
11.10 Inline meter & Meter cable list ................................................................... 101
11.11 CE compliance parts list ............................................................................. 102

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11.12 Other components list................................................................................. 102
12 Disposal........................................................................................... 103

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1 Generalities
1.1 Scope of the documentation
The documentation provides the necessary information for appropriate use of the product. It
informs the user to ensure efficient execution of the installation, operation or maintenance
procedures.
The content of this document is based on the information available at the time of publication. The
original version of the document was written in English.
For safety and environmental protection reasons, the safety instructions given in this
documentation must be strictly followed.
This manual is a reference and will not include every system installation situation. The person
installing this equipment should have:
• training in the Fleck series, SXT controllers and water softener installation;
• knowledge of water conditioning and how to determine proper controller settings;
• basic plumbing skills.
This document is available in other languages on https://www.pentairaquaeurope.com/product-
finder/product-type/control-valves.
1.2 Release management
Revision Date Authors Description
A 26.04.2018 BRY/GJA First edition.
B 12.11.2019 BRY Corrections.
C 12.05.2020 BRY/FIM Copyright and Trademarks.
1.3 Manufacturer identifier, product
Manufacturer: Pentair International LLC
Avenue de Sevelin 18
1004 Lausanne
Switzerland
Product: Fleck 2850 SXT

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1.4 Intended use
The device is intended for industry environment use only and it is purpose-built for water
treatment.
1.5 Abbreviations used
Assy Assembly
BLFC Brine Line Flow Controller
BV Brine Valve
CW Cold Water
DF Down Flow
Distr Distribution
DLFC Drain Line Flow Controller
HW Hot Water
Inj Injector
N/A Not Available
NBP No By Pass
PN Part Number
QC Quick connect
Regen Regeneration
S&S Seals & Spacers
SBV Safety Brine Valve
STD Standard
SM Side Mounted
Sys System
TC Time Clock
TM Top Mounted
UF Up Flow
VB Valve Body
1.6 Norms
1.6.1 Applicable norms
Comply with the following guidelines:
• 2006/42/EC: Machinery Directive;
• 2014/35/UE: Low Voltage Directive;
• 2014/30/UE: Electromagnetic compatibility;
• 2011/65/UE: Restriction of use of certain hazardous substances in electrical and electronic
equipment (RoHS);
• UNI EN ISO9001.

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Meets the following technical standards:
• EN 55014-1;
• EN 55014-2;
• EN 61000-6-1;
• EN 61000-6-2;
• EN 61000-6-3;
• EN 61000-6-4;
• EN 61010-1;
• EN 61000-3-2;
• EN 61000-3-3.
1.6.2 Available certificates
• CE;
• DM174;
• ACS.
Please find beside the certifications for some of our
product families. Please note that this list is not an
exhaustive list of all our certifications. In case of need
for more information please contact us.
1.7 Procedure for technical support
Procedure to follow for any technical support request:
1. Collect the required information for a technical assistance request.
ðProduct identification (see Serial label location [→Page13] and Recommendations
[→Page74]);
ðDescription of the device problem.
2. Please refer to the Troubleshooting [→Page86]. If the problem persists contact your
supplier.
1.8 Copyright and Trademarks
All indicated Pentair trademarks and logos are property of Pentair. Third party registered and
unregistered trademarks and logos are the property of their respective owners.
© 2020 Pentair. All rights reserved.

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1.9 Limitation of liability
Pentair Quality System EMEA products benefit, under specific conditions, from a manufacturer
warranty that may be invoked by Pentair’s direct customers. Users should contact the vendor of
this product for applicable conditions and in case of a potential warranty claim.
Any warranty provided by Pentair regarding the product will become invalid in case of:
• installation done by a non-water-professional;
• improper installation, improper programming, improper use, improper operation and/or
maintenance leading to any kind of product damages;
• improper or unauthorized intervention on the controller or components;
• incorrect, improper or wrong connection/assembly of systems or products with this product
and vice versa;
• use of a non-compatible lubricant, grease or chemicals of any type and not listed by the
manufacturer as compatible for the product;
• failure due to wrong configuration and/or sizing.
Pentair accepts no liability for equipment installed by the user upstream or downstream of Pentair
products, as well as for process/production processes which are installed and connected around
or even related to the installation. Disturbances, failures, direct or indirect damages that are
caused by such equipment or processes are also excluded from the warranty. Pentair shall not
accept any liability for any loss or damage to profits, revenues, use, production, or contracts, or
for any indirect, special or consequential loss or damage whatsoever. Please refer to the Pentair
List Price for more information about terms and conditions applicable to this product.

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1.10 Scan & Service application
Scan & Service mobile application is the ideal support for the maintenance person in his daily
business. A simple scan of an identification (ID) label (1) present on the valve with a smartphone
gives an instantaneously access to all updated information related to the product, such as:
• valve’s and tanks detailed configuration;
• manuals;
• spare parts lists;
• troubleshooting recommendations;
• multi-lingual videos, detailing how to best service a part;
• informations about new products, latest technologies, novelties about the Blue Network
program, etc.
1. Download the application "Scan & Service" from or in a
smartphone(4).
2. Open the application "Scan & Service".
3. Scan the bleam(3) stuck on the valve(2).
4. Navigate to find information.

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2 Safety
2.1 Safety pictograms definition
DANGER
This combination of symbol and keyword indicates an imminently hazardous situation
that will result in serious or fatal injury if not avoided.
WARNING
This combination of symbol and keyword indicates a potentially hazardous situation
that can result in serious or fatal injury if not avoided.
CAUTION
This combination of symbol and keyword indicates a potentially hazardous situation
that can result in minimal or minor injury if not avoided.
Caution - material
This combination of symbol and keyword indicates a potentially hazardous situation
that can result in material damage if not avoided.
Prohibition
Mandatory advice to follow.
Mandatory
Applicable guideline, measure.
Info
Informative comment.

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2.2 Serial label location
Model
Part number
Electrical rating
Serial number
Production date
Production order
Mandatory
Ensure that the serial label and the safety labels on the device are completely legible
and clean!
If necessary, replace them with new labels in the same positions.
2.3 Hazards
All the safety and protection instructions contained in this document must be observed in order to
avoid temporary or permanent injury, damage to property or environmental pollution.
At the same time, any other legal regulations, accident prevention and environmental protection
measures, as well as any recognized technical regulations relating to appropriate and risk-free
methods of working which apply in the country and place of use of the device must be adhered to.
Any non-observation of the safety and protection rules, as well as any existing legal and technical
regulations, will result in a risk of temporary or permanent injury, damage to property or
environmental pollution.
2.3.1 Personnel
CAUTION
Risk of injury due to improper handling!
Only qualified and professional personnel, based on their training, experience and
instruction as well as their knowledge of the regulations, safety rules and operations
performed, are authorized to carry out necessary work.

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2.3.2 Material
The following points must be observed to ensure proper operation of the system and the safety of
user:
• be careful of high voltages present on the transformer (100 – 240V);
• do not put your fingers in the system (risk of injuries with moving parts and shock due to
electric voltage).
2.4 Hygiene and sanitization
2.4.1 Sanitary issues
Preliminary checks and storage
• Check the integrity of the packaging. Check that there is no damage and no signs of contact
with liquid to make sure that no external contamination occurred;
• the packaging has a protective function and must be removed just before installation. For
transportation and storage, appropriate measures should be adopted to prevent the
contamination of materials or the objects themselves.
Assembly
• Assemble only with components which are in accordance with drinking water standards;
• after installation and before use, perform one or more manual regenerations in order to
clean the media bed. During such operations, do not use the water for human consumption.
Perform a disinfection of the system in the case of installations for treatment of drinking
water for human use.
Info
This operation must be repeated in the case of ordinary and extraordinary
maintenance. It should also be repeated whenever the system remains idle for a
significant time.
Valid only for Italy
In case of equipment used in accordance with the DM25, apply all the signs and
obligations arising from the DM25.
2.4.2 Hygiene measures
Disinfection
• The materials used for the construction of our products meet the standards for use with
potable water; the manufacturing processes are also geared to preserving these criteria.
However, the process of production, distribution, assembly and installation, may create
conditions of bacterial proliferation, which may lead to odor problems and water
contamination;
• it is therefore strongly recommended to sanitize the products. See Sanitization [→Page65] ;
• maximum cleanliness is recommended during the assembly and installation;
• for disinfection, use Sodium or Calcium Hypochlorite and perform a manual regeneration.

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3 Description
3.1 Technical specifications
Design specifications/ratings
Valve body Brass
Rubber components EP or EPDM
Weight (valve with controller) 4.6 kg (max)
Recommended operating pressure 1.8 - 8.6 bar
Maximum inlet pressure 8.6 bar
Hydrostatic test pressure 20 bar
Water temperature std 1 - 43°C
Water temperature for HW volumetric 1 - 65°C
Water temperature for HW time clock 1 - 82°C
Ambient temperature 5 -40°C
Regeneration flow DF
Bypass of raw water during
regeneration:
Standard Yes
NBP version No
Flow rates (3.5 bar inlet - valve only - top mount)
Continuous service flow (Δp=1bar) 11.6 m3/h
Peak service flow (Δp=1.8bar) 15.0 m3/h
Cv* 13.2gpm
Kv* 11.4m3/h
Maximum backwash flow
(Δp=1.8bar)
11.1 m3/h
*Cv: Flow rate in gpm across the valve at a pressure drop of 1 psi at 60°F.
*Kv: Flow rate in m3/h across the valve at a pressure drop of 1 bar at 16°C.
Valve connections
Tank top mounted adapter 4” – 8 UN
Inlet/Outlet 1½" BSP female
Riser tube 50 mm [DN40]
Drain line 1" NPT
Brine line (1600/1650) ⅜"
Brine line (1700/1710) ½”

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Electrical
Transformer input voltage 100 to 240 VAC
Input supply frequency 50 to 60 Hz
Transformer output voltage 24 VAC, 60 VA
Controller input voltage 24 VAC
Motor input voltage 24 VAC
Controller max. power consumption 35 W
Controller protection rating IP 22
Valve protection rating IP 44
Power supply 230 VAC, 50/60 Hz,60 VA, Class II
Transient overvoltages within the limits of category II
Pollution Degree 3
Temporary overvoltages must be limited in duration and in frequency.
Environmental conditions
• Indoor use only;
• temperature from 5°C to 40°C;
• maximum relative humidity 80% for temperatures up to 31°C decreasing linearly to 50%
relative humidity at 40°C;
• mains supply voltage fluctuations up to ±10% of the nominal voltage.

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3.2 Performance flow rate characteristics
The graph shows the pressure drop created by the valve itself at different flow rates. It allows
predetermining the maximum flow rate going through the valve depending on the system settings
(inlet pressure etc). It also allows to determine the valve pressure drop at a given flow rate, and
therefore to evaluate the system pressure drop vs flow rate.
FLOW RATE VS PRESSURE DROP
(single valve)
Service
Backwash
Flow rate [m³/h]
Pressure drop [bar]

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3.3 Outline drawing

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3.4 Components description and location
Meter
Outlet
Drain line
Brine line
Injector block
Inlet
Power head
Brine valve

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Micro-switches
AC motor
SXT controller
Piston
Camshaft
Display
Regeneration button
Up button
Down button