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WATTS HKF20 Series Pump Mixing Valve Group with Thermostatic Fix Point Control For Heating Systems

WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-Product

General Information

Important Information

Notice: 

The operator is responsible for ensuring adherence to the local laws and regulations (e.g. accident prevention regulations, etc.). Incorrect operation or operating the pump group contrary to the specifications shall void all rights to any warranty claim.

This Installation and Operating Manual

  • is a component of the pump group
  • contains instructions and information on safe and correct installation and commissioning of the pump group
  • must be available to all users throughout the entire service life of the pump group
  • is intended for trained personnel who are familiar with the applicable standards and provisions and, in particular, with the relevant safety concepts and the operation and mainte-nance of the pump group
  • is protected by copyright and may not be changed without the manufacturer’s permission
  • may not be made accessible to non-authorized personnel; neither in original form nor as a copy

Product conformity
A Declaration of Conformity according to the Machinery Directive 2006/42/EC has been issued for this pump group product.
Product features 

  • stable mounting bracket including mounting hardware
  • patented 3-piece EPP insulating shell
  • all connections to the system with 1″ male thread and flat sealing
  • compact, space-saving design

Safety

Presentation of the safety instructions

DANGER indicates an imminent danger that may cause serious physical injury or death without the corresponding safety precautions.
WARNING indicates a danger arising through incorrect behavior that may cause serious physical injury or death (e.g. misuse, disregarding notices, etc.).
CAUTION indicates a potentially dangerous situation that may cause minor or slight injuries without the corresponding safety precautions.
NOTICE indicates a situation that may cause material damage without the corresponding precautions.

Important safety instructions 

  • Carefully read through these operating instructions.
  • Only connect the pump group to a power source that corresponds to the mains voltage specified on the rating plate of the pump group.
  • The power supply to the pump group must be disconnected prior to maintenance, cleaning and repair work.
  • Only trained specialist personnel are permitted to perform maintenance, cleaning and repair work.
  • The pump group must not be used if it is damaged or if the pump group is no longer operating correctly. In this case, contact your specialist dealer immediately.
  • Adhere to the maintenance instructions and intervals.
  • Protect the pump group from the influences of weather.
  • Never use the pump assembly outdoors.
  • The machine is only permitted to be used for the purpose for which it was intended.

Intended use
The pump group is used to distribute heating water in heating systems. The pump group is completely pre-assembled and designed for mounting on a wall. The pump group is not intended to be operated by people (including children) with physical, sensory or mental disabilities, nor by people with insufficient experience or previous knowledge.
Foreseeable misuse
The following is considered to be foreseeable misuse:

  • operating the pump group contrary to the specifications
  • improper use of the pump group
  • modifications to the pump group that were not agreed with the manufacturer
  • use of replacement or wear parts that were not approved by the manufacturer
  • operating the pump group outdoors (parts and components are not UV resistant)

Responsibilities of the operator
The operator must ensure that:

  • the pump group is only used for its intended purpose
  • the pump group is installed, operated and maintained according to the specifications in the Installation and Operating Manual
  • the pump group is only operated according to local regulations and occupational health and safety regulations
  • all precautionary measures have been carried out to avoid dangers originating from the pump group
  • all precautionary measures for first aid treatment and firefighting have been carried out
  • only authorized and trained users have access to the pump group and operate it
  • users have access to this Installation and Operating Manual at all times

Groups of persons
Only qualified persons may operate the pump group or perform service and maintenance work.
User
A user is deemed to be qualified if they have read these operating instructions and understood the potential risks associated with incorrect behavior.
Fitter/commissioner
Due to their specialist training and knowledge, and taking into consideration the applicable standards, provisions, regulations and laws, a fitter/commissioner is capable of performing work on the pump group and recognizing and avoiding potential risks.

Technical Data

WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-1

Pressure Loss Curve

WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-2

Overall Dimensions

WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-3

Construction

WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-4

  1. Ball valve with gravity brake 1) (supply)
  2. Ball valve (return)
  3. Circulation pump
  4. Thermostatic mixing valve
  5. Bypass connection pipe
  6. Wall bracket
  7. Immersion sleeve for supply sensor (option)
    • A Supply outlet (heating circuit)
    • B Return inlet (heating circuit)
    • C Return outlet (boiler circuit)
    • D Supply inlet (boiler circuit)

Installation and Commissioning

Electricity!

Danger: Risk of death from electric shock.

  • Work on parts carrying live voltage must only be carried out by trained electricians.
  • Disconnect the power supply of the system and secure it against being switched back on before carrying out any installation, maintenance, cleaning or repair work.

Notice: The installation and commissioning of the pump group must only be carried out by trained personnel who have been authorized by the manufacturer.
Caution: Take care to adhere to the specified installation positions and flow directions of the individual components to be replaced during repair or replacement work!
Caution: Material damage!
A water hammer may occur if the stop valve is opened quickly.

  • Always open the stop valve slowly and in a controlled way.

Installation diagramWATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-5

Installation

ll screw fittings must be checked and tightened if required prior to installation and commissioning!
Torque:

  • ¾” fittings 35 Nm
  • 1″ fittings 55 Nm

Requirement

  • The valves are pre-installed at the factory but must be checked for leaks during commissioning (pressure test)
  1. Remove the front panel of the pump group.
  2.  Drill hole according to the size of the screws and wall plugs.
  3. Insert wall plugs.
  4. Screw the hanger bolt into the wall plugs. 9 The hanger bolt must project at least 50 mm out of the wall.
  5. Place the pump group to the wall in a vertical installation position (see “Installation diagram“).
  6. Secure the pump assembly with the nut on the hanger bolt.
  7. Remove the thermometer handles and dismount the intermediate insulation.
  8. Connect the supply and return lines and check that all screw connections are tight.WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-6

Initial Commissioning

Requirement

  • The pump group is completely assembled.

Connection of the power supply

  1. Connect the power supply (see separate pump documentation).
  2. The pump group switches on automatically after being connected to the power supply.
  3. Vent the heating system.
    Notice: The pump group must be switched off during the ventilation process!
  4. Mount intermediate insulation and attach thermometer grips.
  5. Mount the front panel of the pump group.

Setting the supply temperature

  1. While the pump group is operational, you can set the desired supply temperature using the hand wheel on the thermostatic mixing valve.
  2. The target value is checked using the supplied thermometer.WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-7
  • For further information on the thermostatic mixing valve, please refer to the enclosed instructions.

Thermometer handle positionWATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-8

  • An Operation position: Gravity brake ready to work; ball valve open
  • B Empty: Gravity brake open; ball valve ½ open (only included in the supply line)
  • C Service position: Ball valve closed

Exchanging the supply and return line Initial situation: the supply is on the right side.

  1. Disconnect the power supply and secure it against being switched on again.
  2. Pull off the retaining brackets and thermometer handles.
  3. Remove the pump group from the wall bracket.
  4. Loosen the nut on the pump connection at the bottom and turn the pump including ball valve through 180 degrees. Loosen the nut on the pipe ball valve and turn the ball valve through 180 degrees.
  5. Turn the pump group 180 degrees. The supply line is now on the left side.
  6. Tighten the loosened connections to the pump and ball valve (observe tightening torques!). Slide the pump group onto the wall bracket and fasten the retaining clips and ball valves again.
  7. Check the pump group for leaks.
    Observe the separate operating instructions of the thermostatic mixing valve. WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-9

Maintenance

Danger: Electricity!
Only perform maintenance work on the pump group if the voltage supply has been disconnected.
Warning: Hot water!

  • Severe scalds are possible.
  • Do not reach into the hot water when emptying the pump group.
  • Ensure that the pump group has cooled down before carrying out maintenance, cleaning and repair work.
  • Install a suitable scald protection device at every tapping point (for example, safety shut-off valve or thermostat mixer tap).
  • More detailed information on scald protection can be found in DIN 1988, sheet 2, clause 4.2.

Warning: Hot surfaces!

  • Serious burns are possible.
  • Do not touch the pipelines or the components during operation.
  • Ensure that the pump group has cooled down before carrying out maintenance, cleaning and repair work.
  • Wear heat-resistant safety gloves if it is necessary to carry out work on hot components.

Notice: The maintenance of the pump group must only be carried out by trained personnel who have been authorized by the manufacturer.

Annual maintenance intervals

  1. General visual inspections
    • Check the station for leaks and retighten sealing connections or replace seals, as required.
  2. Functional checks
    • Check that settings and operating and performance parameters are set correctly.
    • Check flow noise during operation.
    • Ask users if there are any noticeable problems.
  3. Ball taps
    • Check that stop valves and ball taps can move freely.
  4. Pump
    • Pay attention to the noise of the pump.
  5. Thermostatic mixing valve
    • Check the thermostatic mixing valve for function.
  6. Actions following maintenance work
    • Check that all screw fittings that were unscrewed have been retightened and retighten if necessary.
    • Remove all tools, materials and other equipment used from the working area.
    • Vent the system.

Replacement of wear parts
Please note that the pump group contains parts that, for technical reasons, are subject to wear depending on the intensity of use, even if the specified care and maintenance have been observed. This especially applies to mechanical parts and parts that could come into contact with water and steam, for example, hoses, seals, valves, etc. By their nature, defects as the result of wear do not represent a fault and therefore are not covered by the warranty or the guarantee. Nevertheless, these defects and malfunctions must only be remedied by trained specialist personnel. Contact your specialist dealer for this.

Disassembling the circulation pump

  1. Disconnect the power supply and secure it against being switched on again.
  2. Remove the front panel of the pump group.
  3. Close all stop valves by turning the thermometer handle
  4. Disassemble thermometer handles and intermediate insulation.
  5. Disconnect the wiring of the circulation pump.
  6. Release the fastening nuts (X, fig. 2) and remove the circulation pump.WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-10

Warning: Risk of heavy scalding from hot water!

  • Allow the pump group to cool before servicing.
  • Do not reach into the hot medium when emptying.

Installation of the circulation pump

  1. Replace damaged or defective seals if necessary.
  2. Insert the circulation pump and tighten the nuts (X, fig. 2) (for tightening torques see “Technical data” on page 4).
  3. Connect the wiring of the circulation pump.
  4. Slowly open the ball valves by turning the thermometer handle.
  5. Slowly pressurize the pump assembly and vent the system if necessary.
  6. Check the pump group for leaks.
  7. Restore the power supply to the pump group.
  8. Disassemble the thermometer handles.
  9. Install the intermediate insulation, the thermometer handles, and the front panel.WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-11

Disassembling of the thermostatic mixing valve

  1. Disconnect the power supply and secure it against being switched on again.
  2. Remove the front panel of the pump group (A, fig. 1).
  3. Close all stop valves by turning the thermometer handle (B, fig. 1).
  4. Disassemble thermometer handles and intermediate insulation (C, fig. 1).
  5. Dismantle the thermostatic mixing valve with temperature setting (D, fig. 3) by loosening the union nuts (X, fig. 3).WATTS-HKF20-Series-Pump-Mixing-Valve-Group-with-Thermostatic-Fix-Point-Control-For-Heating-Systems-fig-12

Installation of the thermostatic mixing valve

  1. Replace damaged or defective seals if necessary.
  2. Insert the thermostatic mixing valve (D, fig. 3) and tighten the nuts (X, fig. 3) (for tightening torques see “Technical data” on page 4).
  3. Slowly open the ball valves by turning the thermometer handle (B, fig. 1).
  4. Restore the power supply to the pump group.
  5. Disassemble the thermometer handles (B, fig. 1).
  6. Install the intermediate insulation, the thermometer handles, and the front panel.

Disposal

Warning: Potential contamination of the environment and groundwater due to improper disposal! The regulations and guidelines of the legislature in the country of operation must be complied with when disposing of components and operating materials.

  1. Ensure that all subassemblies and components are de-energized.
  2. Professionally disassemble the pump group or commission a specialist company with this task.
  3. Sort the subassemblies and component parts into recyclable materials and operating materials.
  4. Dispose of the subassemblies and components according to regional laws and regulations or take them to be recycled.

Return shipment to the manufacturer
Get in contact with the manufacturer if you would like to return the pump group or parts of it.
Reporting to administrative bodies and manufacturer
Inform the manufacturer about decommissioning and disposal of the pump group for statistical purposes.

Guarantee

WATTS products are extensively tested. For this reason, WATTS only guarantees the replacement or – at the exclusive discretion of WATTS – free-of-charge repair of the components of the supplied products that, in the opinion of WATTS, have verifiable manufacturing faults. Warranty claims due to defects or defects of title can be invoked within one (1) year from delivery/transfer of risk. Excluded from the warranty are damages attributable to normal product wear or friction as well as damages as a result of modifications or non-authorized repairs on the products, for which WATTS rejects all claims for compensation (direct or indirect). (For more detailed information, please refer to our website.) All deliveries are subject to the General Terms and Conditions, which can be found on www.wattswater.eu/gtc/.

The descriptions and photographs contained in this product specification sheet are supplied by way of information only and are not binding. Watts Industries reserves the right to carry out any technical and design improvements to its products without prior notice.” Warranty: All sales and contracts for sale are expressly conditioned on the buyer’s assent to Watts terms and conditions found on its website at www.wattswater.eu/gtc/ Watts hereby objects to any term, different from or additional to Watts terms, contained in any buyer communication in any form, unless agreed to in a writing signed by an officer of Watts..

Address: 

Watts Industries Deutschland GmbH Godramsteiner Hauptstr. 167 • 76829 Landau • Deutschland
Tel. +49 6341 9656 0 • Fax +49 6341 9656 560 [email protected]www.wattswater.de

Documents / Resources

WATTS HKF20 Series Pump Mixing Valve Group with Thermostatic Fix Point Control For Heating Systems [pdf] Installation Guide
HKF20 Series, Pump Mixing Valve Group with Thermostatic Fix Point Control For Heating Systems, HKF20 Series Pump Mixing Valve Group with Thermostatic Fix Point Control For Heating Systems

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