Pentair Siata V132 SFE User guide

SIATA
V132 SFE

Installer manual Siata V132 - SFE - Table of contents
2 / 88 Ref. MKT-IM-003 / B - 19.04.2017
Table of contents
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.9. Limitation of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1. Safety pictograms definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.2. Safety tags location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3. Hazards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.1. Personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.2. Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4. Hygiene and sanitization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.1. Sanitary issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4.2. Hygiene measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1. Valve versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.1. Twin pilots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1.2. External connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2. Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
3.2.1. Performance flow rate characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3. Outline drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4. Description and components location . . . . . . . . . . . . . . . . . . . . . . .16
3.4.1. Valve with twin pilots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.4.2. Valve with external pilots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.5. System regeneration cycle (4-cycle operation) . . . . . . . . . . . . . . . . 18
3.6. Options available on the valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

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4. System sizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4.1. Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1.1. Injector/DLFC/BLFC-Valve configuration . . . . . . . . . . . . . . . . . . . . . . . 23
4.2. Sizing a softener (single unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2.1. Parameter to be considered. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.2.2. Determining the required volume of resin . . . . . . . . . . . . . . . . . . . . . . 25
4.2.3. Resin exchange capacity and capacity of the unit . . . . . . . . . . . . . . . . 25
4.2.4. Valve configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.2.5. Cycle time calculation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4.2.6. Brine refill - cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4.3. Injection flow rates (tables) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
4.4. Salt amount definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
5.1. Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.2. Safety notices for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3. Installation environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3.1. Tips and suggestions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3.2. General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.3. Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.4. Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.3.5. Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.3.6. Integration constraints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5.4. Block diagram and configuration example . . . . . . . . . . . . . . . . . . 36
5.5. Diagrams of softening systems and connections . . . . . . . . . . . . . 37
5.6. Valve connection to piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.6.1. Top-mounted valve installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5.7. Connections (electrical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.8. Bypassing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.8.1. Manual Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.8.2. Automatic Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.9. Drain line connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.10. Overflow line connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.11. Brine line connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.12. Chlorinator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6. Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
6.1. General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.2. Basic programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.3. Advanced programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.3.1. Statistics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.3.2. Resetting the EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.3.3. Resetting the hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

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7. Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.1. Start up procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.2. Sanitization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
7.2.1. Disinfection of water softeners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.2.2. Sodium or calcium hypochlorite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.2.3. Electro chlorination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8.1. Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
8.2. Manual regeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8.3. Cancelling a regeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8.4. Microswitch search . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
8.5. Salt recharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
9. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.1. Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
9.1.1. Use original spare parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.1.2. Use original approved lubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.1.3. Maintenance instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
9.2. Cleaning and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.2.1. Cleaning and maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.2.2. Replacing the controller battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9.2.3. Motor replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.2.4. Microswitch replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.2.5. Cleaning the injector and the injector screen . . . . . . . . . . . . . . . . . . . . 62
9.2.6. Replacing the drain connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
9.2.7. Replacing the twin pilots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9.2.8. Replacing the pilots (external drivers connections) . . . . . . . . . . . . . . . 68
9.2.9. Replacing the internal pistons and the seals and spacers . . . . . . . . . . 70
10. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
11. Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
11.1. Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
11.2. Valve parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
11.3. SFE spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
11.4. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
12. Scrapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

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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 Siata series, SFE controllers and water conditioner installation;
• Knowledge of water conditioning and how to determine proper controller settings;
• Basic plumbing skills.
This document is available in other languages on www.pentairaquaeurope.com/product-finder/
product-type/control-valves.
1.2. Release management
1.3. Manufacturer identifier, product
Manufacturer: Pentair Manufacturing Italy Srl
Via Masaccio, 13
56010 Lugnano di Vicopisano (PI) – Italy
Product: Siata V132 - SFE
1.4. Intended use
The device is intended for residential, commercial or light industry environment (ref. EN 50081-1) use
only and it is purpose-built for treatment and softening of water coming from supply network.
Revision Date Author Description
A18.11.2016 STF First edition
B19.04.2017 BRY New chapter: Valve connection to piping

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1.5. Abbreviations used
DF............................................................ Down Flow
Inj ............................................................ Injector
DLFC ....................................................... Drain Line Flow Controller
BLFC / Refill Flow Controller................. Brine Line Flow Controller
QC............................................................ Quick Connect
Regen...................................................... Regeneration
S&S ......................................................... Seal & Spacer
SBV.......................................................... Safety Brine Valve
TC ............................................................ Time Clock
1.6. Norms
1.6.1. Applicable norms
Comply with the following guidelines:
• DM174: "Regulation of materials and objects that can be used in stationary collection, treatment,
supply and distribution of water intended for human consumption"
• 2006/42/EC: Machinery Directive
• 2014/35/UE: Low Voltage Directive;
• 2014/30/UE: Electromagnetic compatibility;
• UNI EN ISO 9001 (Certificate no. 95.022 SSG ICS)
Meets the following technical standards:
• EN 61010-1
• EN 61000-6-1
• EN 61000-6-2
• EN 61000-6-3
• EN 61000-6-4
• EN 55014-1
• EN 55014-2
1.6.2. Available certificates
•CE •ACS
•DM174 Access to all certifications:

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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. Safety tags location, page 8 and 9.1. Recommendations,
page 57);
→ Problem description of the device.
BPlease refer to the "Troubleshooting" chapter, page 74. If the problem persists contact your
supplier.
1.8. Copyright
© 2017 Pentair International Sàrl 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 will become invalid in case of:
• 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.

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2. Safety
2.1. Safety pictograms definition
2.2. Safety tags location
Note
Ensure that 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.
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.
A
A
A
A
A
A
Part number Valve serial number
Serial label
Controller serial number
Serial number
A

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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
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.
The device must not be used by children aged under 8 years old or people with reduced physical,
sensory or mental capabilities.
People with a lack of experience or without the necessary knowledge should not use the device.
Do not allow children to play with the device. Cleaning and maintenance intended to be performed by
the user must not be performed by unsupervised children.
2.3.2. Material
The following points must be observed to ensure proper operation of the system and the safety of
users:
• Beware of high voltages present on the transformer (230V).
• 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 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 DM 174 and ACS.
• 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.
D
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 odour problems and water contamination.
• It is therefore strongly recommended to sanitize the products. See 7.2. Sanitization, page 53.
• Maximum cleanliness is recommended during the assembly and installation.
• For disinfection, use Sodium or Calcium Hypochlorite and perform a manual regeneration.
A
A

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3. Description
3.1. Valve versions
3.1.1. Twin pilots
The pressure distributor pilot is mounted directly on top of the V132, in this case inlet water is the
control fluid and feeds the pilot circuit from the top collector. A controller with a proper camshaft
(called twin pilot camshaft) must be mounted on top of the valve and linked to the pilot stems. The
rotation of the camshaft moves the stems of the pilots in/out the pilot circuit, deviating the control
water inside the proper side of the V132 pressure chambers to move the pistons of the valve according
to the various cycles/phases.
3.1.2. External connections
There are four quick connection ports on top of the valve, each port is linked to a pressure chamber
inside the valve. The hydraulic distributor with pilots has to be mounted remotely from the valve, the
pilot ports can be connected to valve ports with a diameter of 6 mm flexible tubing.
The remote camshaft can control up to 4 pilots hence more valves can be controlled with a single
distributor. For this reason this configuration is generally used to:
• add outlet shut off pneumatic valve;
• add bypass during regeneration;
• control a valve in the suction line and make a timed brine draw.
External connections Twin pilots

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3.2. Technical specifications
Design specifications/ratings
Valve body ............................................... Glassfiber reinforced ABS
Rubber components ............................... NBR
Valve material certification .................... DM174, ACS, KTW, W270
Weight (valve with controller) ................ 2.5 kg (max.)
Recommended operating pressure ....... 1.5 - 6 bar (22 - 87 psi)
Hydrostatic test pressure....................... 22 bar (319 psi)
Water temperature................................. 5 - 38°C (41 - 100.4°F)
Ambient temperature............................. 5 - 38°C (41 - 100.4°F)
Maximum relative humidity.................... 80% for temperatures up to 31 °C decreasing linearly to 50%
relative humidity at 40°C;
Indoor use only
Flow rates (3.5 bar inlet - valve only)
Continuous (Δp = 1 bar) .......................... 7.0 m3/h (30.8 gpm)
Cv*........................................................... 8.09 gpm
Kv*........................................................... 7 m3/h
Maximum backwash (Δp = 1.8 bar) ........ 3.0 m3/h (13.2 gpm)
*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 Thread............................................ 2 ½" 8 NPSM
Inlet/Outlet ............................................. Male 2" BSP or various QC fittings
Riser tube ............................................... 32 mm
Drain line ................................................ 20 mm
Brine line ................................................ ⅜"
Electrical
Controller................................................ 12 VAC, 50/60 Hz, 4 W, Class III
Input supply frequency ........................... 50 or 60 Hz (controller configuration dependent)
Transformer*.......................................... 230 VAC, 50/60 Hz, 11.5 VA, Class II
Motor input voltage................................. 12 VAC
Protection rating..................................... IP 30
* : The device must only be used with the transformer provided in order to guarantee the safety voltage supply.

Installer manual Siata V132 - SFE - Description
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3.2.1. Performance flow rate characteristics
The graph shows the pressure drop created by the valve itself at different flow rates. It makes it
possible to predetermine the maximum flow rate going through the valve depending on the system
settings (inlet pressure etc). It also makes it possible to determine the valve pressure drop at a given
flow rate, and therefore to evaluate the system pressure drop vs flow rate.
L / m
Gpm
ΔP (Bar)

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3.3. Outline drawing

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PAGE INTENTIONALLY LEFT BLANK

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3.4. Description and components location
3.4.1. Valve with twin pilots
SFE Controller
LCD Display
Down button
Up button
Regen button
Long manifold
Extra pressure output
connection
Injector
Brine line connection
Inlet
Mixing device
Outlet + turbine
Volumetric sensor input
Drain line connection
Tank connection
Twin pilots
Camshaft
Pilots
Injector screen
Injector
Seals and spacer with NUT
Inlet / Outlet pistons
Motor
Electronic board with reset button
Electrical connections with plastic cover

Installer manual Siata V132 - SFE - Description
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3.4.2. Valve with external pilots
Note
Only the components that differ from the twin pilots valve are described below.
Refer to chapter 3.4.1. Valve with twin pilots, page 16 for more information.
A
Camshaft
External pilots
Short manifold
External pilots connections

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3.5. System regeneration cycle (4-cycle operation)
Service — 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 towards sodium ions. The water is conditioned as it passes through the resin bed.
Backwash — cycle C1
The flow of water is reversed by the controller valve and directed down the riser tube and up through
the resin bed. During the backwash cycle, the bed is expanded and debris is flushed to the drain, while
the media bed is remixed.
Brine draw— cycle C2
The controller 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 are displaced by sodium ions and are sent to the drain. The resin is regenerated during
the brine cycle. Then the slow rinse phase starts.
Slow rinse — cycle C3
The slow rinse cycle allows the brine to be slowly pushed into the resin bed, enabling regeneration of
the resin.
Fast rinse — cycle C4
The controller value 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.
Note
After fast rinse cycle, water is directed to the brine tank to create brine for the next
regeneration. But the brine refill cycle is not performed by the controller (this step is not
included in the programmed cycles). See “Brine refill - cycle”, page 30.
A

Installer manual Siata V132 - SFE - Description
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Note
For illustration purpose only. Always verify inlet and outlet marking on the valve.
A
From
brine
tank
BRINE DRAW /
SLOW RINSE
C2 and C3
BACKWASH
C1
SERVICE
C0
FAST RINSE
C4
Valve
Valve Valve
Valve

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Inlet Outlet Outlet
Drain Drain
Service flow diagram Backwash flow diagram
Inlet Outlet Inlet Outlet
Drain Drain
Brine draw diagram Slow rinse diagram
Inlet Outlet
Drain
Fast rinse diagram
Inlet