Pentair Riversoft User guide

Riversoft
Water Softener
INSTALLER
MANUAL
WATER PURIFICATION

Installer Manual Riversoft - Table of content
2 / 90 Ref. MKT-IM-045 / A - 13.03.2020
Table of content
1. Generalities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1. Scope of the documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2. Release management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3. Manufacturer identifier, product . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4. Intended use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5. Abbreviations used and glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6. Norms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6.1. Applicable norms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6.2. Available certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.7. Procedure for technical support . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.8. Copyright and Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.9. Limitation of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.10. Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1. Safety pictograms definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2. Serial and safety tags location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3. Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.1. Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.2. Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.3. Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4. Hygiene and sanitization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.1. Sanitary issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.2. Hygiene measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1. Introduction to softeners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.1. Softening principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.2. System service & regeneration cycles (8-cycles operation). . . . . . . . . 14
3.2. Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.2.1. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2.2. Performance flow rate characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3. Outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3.4. Description and components location . . . . . . . . . . . . . . . . . . . . . . .21
3.5. Softener’s available options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.5.1. Safety brine valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.1. Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.2. Safety notices for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

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4.3. Installation environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3.1. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.3.2. Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.3.3. Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.3.4. Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.4. Integration constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.5. Softener connection to piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.5.1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.5.2. Installation layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.5.3. Tools and material required for installation. . . . . . . . . . . . . . . . . . . . . 30
4.5.4. Inspection/preliminary assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.5.5. Softener installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.5.6. Water supply line and bypass connections . . . . . . . . . . . . . . . . . . . . . . 33
4.6. Drain line flow controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
4.6.1. Drain line connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
4.6.2. Brine line connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.6.3. Overflow line connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
4.6.4. Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5. Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
5.1. Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.2. Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
5.3. Quick program guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.4. Time of day . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
5.5. Brine dosage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.6. Volumetric regeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.7. Time clock regeneration (Riversoft 4 only) . . . . . . . . . . . . . . . . . . 47
5.8. Calendar override setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.9. System selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.10. Regeneration cycles time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
5.11. History values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
5.12. Resetting the controller and system selection (u1 to u4) . . . . . . . 49
6. Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
6.1. Softener commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.1.1. Water filling, draining and waterproofness inspection . . . . . . . . . . . . 50
6.1.2. Quick cycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.1.3. Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.1.4. Additional tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.2. Cleaning, disinfection and sanitization . . . . . . . . . . . . . . . . . . . . . . 53
6.2.1. Cleaning of softeners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.2.2. Disinfection with sodium or calcium hypochlorite . . . . . . . . . . . . . . . . 53
6.2.3. Sanitization by electrochlorination process . . . . . . . . . . . . . . . . . . . . . 54

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7. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.1. Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.1.1. During operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.1.2. During regeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2. Manual regeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2.1. Manual delayed regeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.2.2. Immediate regeneration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.2.3. To advance regeneration cycles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.2.4. To cancel a regeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.3. Operation during a power failure . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.1. General system inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.1.1. Water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.1.2. Mechanical Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.1.3. Regeneration test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.2. Recommended maintenance plan . . . . . . . . . . . . . . . . . . . . . . . . . .58
8.2.1. Maintenance instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
8.3. Adding salt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
8.4. Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.4.1. Use original spare parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.4.2. Use original approved lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.5. Cleaning and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.5.1. First steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
8.5.2. Covers removal (softener and valve). . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
8.5.3. Brine tank and brine well cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8.5.4. Cleaning the refill flow controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.5.5. Cleaning injector and injector screen . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
8.5.6. Controller replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8.5.7. Other wear and tear parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
9. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
9.1. Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
9.2. Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
9.3. System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
10. Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
10.1. Softener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
10.2. Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
10.3. Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
11. Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

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1. Generalities
1.1. Scope of the documentation
This documentation provides the necessary information for appropriate use of the product and
informs users 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 368 valves with 604-606 series 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/softeners.
1.2. Release management
1.3. Manufacturer identifier, product
Manufacturer: Pentair International LLC
Avenue de Sevelin 18
1004 Lausanne
Switzerland
Product: Riversoft
1.4. Intended use
• For domestic use only;
• the water softener series Riversoft may only and exclusively be used for residential water
softening under specified conditions, see 4.3.2. Water, page 25;
• the water softener series Riversoft protects water pipes and connected water-carrying systems
from scaling, respectively from malfunctions and damage caused by scaling;
• the water softener series Riversoft is designed for continuous supply of water for different family
sizes depending on the chosen model.
Revision Date Authors Description
A13.03.2020 STF/GPI First edition.

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1.5. Abbreviations used and glossary
Assy......................................................... Assembly
BLFC ....................................................... Brine Line Flow Controller
DF............................................................ Down Flow
DLFC ....................................................... Drain Line Flow Controller
Inj ............................................................ Injector
QC............................................................ Quick Connect
Regen...................................................... Regeneration
SBV.......................................................... Safety Brine Valve
TC ............................................................ Time Clock
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/EC: Restriction of use of certain hazardous substances in electrical and electronic
equipment (RoHS);
• UNI EN ISO9001.
Meets the following technical standards:
• IEC/EN 60335-1;
• IEC 61010-1;
• EN 55014-1;
• EN 55014-2;
• EN 61000-3-2: 2006 + A1: 2009 + A2: 2009;
• EN 61000-3-3: 2008;
• EN 61000-6-2: 2005;
• EN 61000-6-3: 2007 + A1: 2011;
• EN 61326-1.
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.

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1.7. Procedure for technical support
Procedure to follow for any technical support request:
ACollect the required information for a technical assistance request.
→ Product identification (see 2.2. Serial and safety tags location, page 8 and 
8.1.2. Mechanical Checks, page 57);
→ Problem description.
BPlease refer to the "Troubleshooting" chapter, page 78. 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.
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 may 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 of profits, revenues, use, production, or contracts, or for any indirect,
special or consequential loss or damage whatsoever. Please refer to the Pentair List Price to know
more about terms and conditions applicable to this product.
1.10. Illustrations
Depending on the configuration of your softener, it can be mounted with a bypass or a manifold. We
chose to use the bypass configuration to illustrate this document. However when necessary, we
illustrated both configurations.

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2. Safety
2.1. Safety pictograms definition
2.2. Serial and safety tags location
CAUTION
Warns of a risk of minor injury or
major material damage to the device
or environment.
WARNING
Warns against serious personal injury
and damage to health.
DANGER
Warns against serious personal injury
or death.
MANDATORY
Standard or measure to apply. 
NOTE
Comment.
PROHIBITION
Restriction to be observed.
Model
Electrical rating
Part number
Serial number
Production date
Production order
Locking bars label

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NOTE
Ensure that the serial label and the safety tags on the device are completely legible and
clean. If necessary, replace them with new tags and put them in the same places.
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
Only qualified and professional personnel, based on their training, experience and
instruction as well as their knowledge of the regulations, the safety rules and operations
performed, are authorized to carry out necessary work.
2.3.2. Transport
The following points must be observed to ensure proper operation of the system:
• do not lay down or flip over the softener at any time. The media may paste to the upper
distributor thus obstructing its slots or enter the valve and may therefore compromise the
softener operation;
• pay attention not to hit the softener;
• use all the safety lifting systems to move the softener;
• do not lift the softener by the valve or bypass.
2.3.3. Material
The following points must be observed to ensure proper operation of the system and the safety of
user:
• beware of high voltages present on the transformer (230 V);
• do not put your fingers in the system (risk of injuries with moving parts and shock due to electric
voltage).

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2.4. Hygiene and sanitization
2.4.1. Sanitary issues
Preliminary checks and storage
• Check that the brine tank and the brine well are clean and free from burr, debris or any scraps;
• 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 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.
NOTE
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.
NOTE
Valid only for Italy: In case of equipment used in accordance with the DM25, apply all the
signs and obligations arising from the DM25.

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2.4.2. Hygiene measures
DANGER
Do not use with water that is micro-biologically unsafe or of unknown quality without
adequate disinfection before or after the softener.
WARNING
Water softeners using sodium chloride for regeneration will add sodium to the water.
Person who are on sodium-restricted diets should consider the added sodium as part of
their overall sodium intake.
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 odour problems and water contamination;
• it is therefore strongly recommended to sanitize the products. See 6.2. Cleaning, disinfection and
sanitization, page 53;
• 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. Introduction to softeners
3.1.1. Softening principles
Softening is an ion exchange process where the hard ions are getting exchange by soft ions, typically
sodium or potassium. This is achieved by placing the water in contact with an ion exchange resin and
ensuring the contact time is appropriate for the flow rate to produce.
The basic chemistry of softening resins is very simple: the resin is made of small polymer beads with
chemical functionality that selectively captures the divalent ions (such as Ca2+ and Mg2+ - hardness
ions) and releases in exchange less tightly held monovalent ions, usually sodium (Na+) or less
frequently potassium. Here below is shown the chemical reactions mechanism for softening:
The means that under certain conditions, the reactions can be reversed. This is due to the
equilibrium between the water composition and the amount of hardness that can be removed. This
reverse reaction is observed at different kinetics and at high monovalent ions concentration. Usually
for softening this conditions are obtained using concentrated NaCl (or KCl) solutions that are put in
contact with the resin. This is called regeneration:
Hardness Resin bead Exhausted resin
bead
Soft water
Saturated
brine
Exhausted
resin bead
Regenerated
resin bead
Waste Excess
salt

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The service and regeneration reaction can be done over and over, so softening systems last years.
A softener consists of different components:
• a tank, filled with softening resin;
• a valve, that will direct the inlet water flow on the resin bed so that the softening or regeneration
reaction can take place;
• a timer, that will control when the regeneration phases have to be done;
• a brine tank, where saturated brine solution is prepared for the regenerations.
The present softener will simply allow the previously described reaction to happen, alternating
softening period of few days with regeneration that may last up to few hours depending on setting
done. The softener is equipped with a controller that will trigger automatically the different phases of
service and regeneration upon the programming done.
The valve configuration has been chosen to be in accordance with the volume of resin contained in the
tank. Do not intend to modify it or you may cause kinetics changes and may cause regeneration
malfunction.
In order to ensure proper softener function, make sure it always contains salt in the brine tank and
remains electrically powered. Softener installation, start up and programming must be done by
trained professional water treatment specialist. Incorrect installation or wrong programming may
cause softener malfunctions or even damage the softener and its components.
Respect programming recommendations for each softener size in order to achieve best optimized
softener performances.
Softener requires periodical cleaning/maintenance operations to ensure proper function over years.
Those are described in the present manual on chapter 8. Maintenance, page 57.

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3.1.2. System service & regeneration cycles (8-cycles operation)
Service (downflow) — cycle C0
Untreated water is directed down through the resin bed and up through the riser tube. The hardness
ions attach themselves to the resin and are removed from the raw water being exchanged on the resin
beads against sodium ions. The water is conditioned as it passes through the resin bed.
Backwash (upflow) — cycle C1
The flow of water is reversed by the valve and directed down the riser tube and up through the resin
bed. During the backwash cycle, the bed is expanded and debris are flushed to the drain, while the
media bed is remixed.
Brine draw (downflow) & slow rinse — cycle C2
The valve directs water through the brine injector and brine is drawn from the brine tank. The brine
is then directed down through the resin bed and up through the riser tube to the drain. The hardness
ions on the resin beads are replaced by sodium ions and are sent to the drain. The resin is regenerated
during the brine cycle. When the air check valve closes brine draw finishes, and then the slow rinse
phase starts.
Repressurization cycle — cycle C3
This cycle allows the air and water to hydraulically balance in the valve before continuing the
regeneration.
Rapid rinse (downflow) — cycle C4
The valve directs water down through the resin bed and up through the riser tube to the drain. Any
residual brine is rinsed from the resin bed, while the media bed is recompacted.
2nd Backwash (upflow) — cycle C5
2nd Rapid rinse (downflow) — cycle C6
Brine refill — cycle C7
Water is directed to the brine tank at a rate controlled by the refill flow controller, to prepare brine for
the next regeneration. During brine refill cycle, treated water is already available at the valve outlet.
NOTE
For illustration purpose only. Always verify inlet and outlet marking on the softener.

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BRINE DRAW/SLOW RINSE
C2
BACKWASH
C1 and C5
SERVICE
C0
BRINE REFILL
C7
RAPID RINSE
C4 and C6
REPRESSURIZE
C3
7Mediabead
8Brine
4Drain
5Mediatank
6 Brine tank
1Inlet
2Outlet
3Valve
Soft water Hard water

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3.2. Technical specifications
3.2.1. General
Softener type
Riversoft 4............................................... 4 L
Riversoft 8............................................... 8 L
Riversoft 15............................................. 15 L
Riversoft 30............................................. 30 L
Design specifications/ratings
Softener cabinet ..................................... ABS
Tank body................................................ Dowex®HCRS-s resin
Valve body ............................................... Glass-filled Noryl®- NSF listed material
Rubber components ............................... Compounded for cold water - NSF listed material
Valve material certification .................... WQA Gold Seal Certified to ORD 0902, NSF/ANSI 44, CE, ACS
Volume of resin....................................... 4 L.....................8 L ....................15 L .................. 30 L
Approximative shipping weight .............. 9.5 kg................16.5 kg..............27 kg ................ 30 kg
Salt storage ............................................ 6 kg...................25 kg.................50 kg ................ 50 kg
Operating pressure ................................ 1.4 - 8.6 bar
Hydrostatic test pressure....................... 20 bar
Water temperature................................. 4 - 38°C
Ambient temperature............................. 2 - 50°C
Drain
Inlet
Outlet
Overflow
Riversoft with bypass configuration
Riversoft with manifold
configuration
Brine tank connection
Overflow
Outlet
Drain
Inlet
Brine tank connection
Manifold
Bypass

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3.2.2. Performance flow rate characteristics
NOTE
Flow rates are indicative data. Maximum flow rate to produce in order to respect the
required service velocity for an optimal ion exchange upon resin manufacturers
recommendation, regardless of the inlet pressure.
Softening
Number of people................................... POU*................ 1-2 ....................3-4.................... 5-8
* assuming a 200L per day water consumption at POU (Point Of Use).
Capacity & salt consumption for the different salt dosage setting
Softener Riversoft
4815 30
Nominal (residual hardness 0 mg/L as CaCO3)
[m3/h] 0.2 0.5 0.9 1.8
Nominal (residual hardness 50-100 mg/L as
CaCO3) [m3/h] 0.3 0.6 1.1 2.2
Peak (residual hardness mg/L as CaCO3) [m3/h] 0.4 0.8 1.5 3.0
Softener Riversoft 4 Riversoft 8
Corresponding salt dosage (g/L of resin) 80 120 200 80 120 200
Salt amount per regen (kg) 0.3 0.5 0.8 0.6 0.9 1.6
Capacity (kg as CaCO3)0.16 0.2 0.24 0.32 0.4 0.5
Capacity in m3(for 300ppm inlet hardness and
100ppm residual hardness) 0.79 0.98 1.22 1.60 1.98 2.48
Estimated salt consumption per year (kg) for 200 L
daily water consumption per person and 300 mg/L
as CaCO3inlet hardness, residual 100 mg/L as
CaCO3
28.8 34.9 46.6 14.2 -
28.4
17.2 -
34.5 23 - 46
Softener Riversoft 15 Riversoft 30
Corresponding salt dosage (g/L of resin) 80 120 200 80 120 200
Salt amount per regen (kg) 1.2 1.8 3.0 2.4 3.6 6
Capacity (kg as CaCO3)0.6 0.75 0.93 1.21 1.49 1.86
Capacity in m3(for 300ppm inlet hardness and
100ppm residual hardness) 3.02 3.74 4.67 6.03 7.45 9.31
Estimated salt consumption per year (kg) for 200 L
daily water consumption per person and 300 mg/L
as CaCO3inlet hardness, residual 100 mg/L as
CaCO3
45.8 -
61
55.5 -
74
74.1 -
98.8
86.6 -
115.5
105.1-
140.1
145.9-
233.5

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Valve configuration
Injector.................................................... E .......................G .......................F ....................... H
DLFC ....................................................... 6 gpm................8 gpm ...............7 gpm ............... 9 gpm
BLFC ....................................................... 0.14 gpm...........0.14 gpm ..........0.14 gpm .......... 0.14 gpm
Cycles duration [min]
Estimated water consumption per regeneration [L]
Softener connections
Inlet/Outlet.............................................. ¾" BSPT, male
Drain line ................................................ ½"
Overflow drain line ................................. ½"
Electrical
Controller Operating Voltage ................. 12 VAC (requires use of Pentair Water supplied transformer)
Input Supply Frequency.......................... 50 or 60 Hz
Motor Input Voltage ................................ 12 VAC
Controller Power Consumption ............. 6 W average
Protection rating..................................... IP23
Transient overvoltages........................... within the limits of category II
Pollution Degree..................................... 3
Temporary overvoltages must be limited in duration and in frequency.
Riversoft 4 Riversoft 8 Riversoft 15 Riversoft 30
C1 1 1 1 1 1 1 3 3 3 3 3 3
C2 27 28 30 29 31 34 52 56 63 59 66 81
C3 3 3 3 3 3 3 3 3 3 3 3 3
C4 1 1 1 1 1 1 3 3 3 3 3 3
C5 1 1 1 1 1 1 1 1 1 1 1 1
C6 1 1 1 1 1 1 1 1 1 1 1 1
C7 1.7 2.5 4.1 3.4 58.3 54.8 58.5 65.6 12.5 18.8 31.2
Riversoft 4 Riversoft 8 Riversoft 15 Riversoft 30
24.6 25.5 27.4 36.1 38.0 41.3 54.8 58.5 65.6 104.5 113.1 131.0

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3.3. Outline drawing
Riversoft 4
Riversoft 8
Bypass configuration Manifold configuration
Bypass configuration Manifold configuration

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Riversoft 15
Bypass configuration Manifold configuration
Riversoft 30
Bypass configuration Manifold configuration