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HKF25-IM-DE-W-UK-11-2020-Rev.0 | Part no. 10027337

8.5  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.
3.  Close all stop valves by turning the thermometer handle.
4.  Disassemble thermometer handles and intermediate 

insulation.

5.   Dismantle the thermostatic mixing valve (A) with tempera-

ture setting by loosening the union nuts (X).

8.6  Installation of the thermostatic mixing valve

1.  Replace damaged or defective seals if necessary.
2.  Insert the thermostatic mixing valve (A) and tighten the nuts  

(X) (for tightening torques see “Technical data” on page 4).

3.  Slowly open the ball valves by turning the thermometer 

handle.

4.  Restore the power supply to the pump group.
5.  Disassemble the thermometer handles.
6.  Install the intermediate insulation, the thermometer han-

dles, and the front panel.

X

A

X

Summary of Contents for FlowBox HKF25 Series

Page 1: ...Series HKF25 Pump mixing valve group with thermostatic fix point control for heating systems Installation and Operating Manual WattsWater eu ...

Page 2: ...tion of Conformity according to the Machinery Directive 2006 42 EC has been issued for this pump group product 1 3 Product features stable mounting bracket including mounting hardware patented 3 piece EPP insulating shell compact space saving design Contents 1 General information 2 1 1 Important information 2 1 2 Product conformity 2 1 3 Product features 2 2 Safety 3 2 1 Presentation of the safety...

Page 3: ...mp 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 2 4 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 ...

Page 4: ...tation Dimensions Width x height x depth with EPP shell 300x370x240 mm Axis center distance 125 mm Sealing surfaces distance 342 5 mm Connections to pipe network Heating circuit top 11 2 AG male connection flat sealing Fitting 11 2 Union nut x1 IG female connection Boiler circuit bottom 11 2 male connection flat sealing Tightening torques for screwed connections 3 4 35 Nm 1 55 Nm 11 4 90 Nm 11 2 1...

Page 5: ... HKF25 IM DE W UK 11 2020 Rev 0 Part no 10027337 5 Overall dimensions 240 5 370 384 125 125 300 G11 2 G11 2 Rp1 Rp1 40 130 130 4 Pressure loss curve 1 10 100 1 000 100 10 000 1 000 Flow rate l h Pressure loss mbar ...

Page 6: ...k 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 mainte nance cleaning or repair work The installation and commissioning of the pump group must only be carried out by trained personnel who have been authorized by the manufacturer Take car...

Page 7: ...nd return lines and check that all screw connections are tight 7 3 Initial Commissioning Requirement The pump group is completely assembled Connection of the power supply 1 Connect the power supply see separate pump documentation 9 9 The pump group switches on automatically after being connected to the power supply 2 Vent the heating system The pump group must be switched off during the ventilatio...

Page 8: ...ittings 2 Loosen the nuts on the pump bottom connection and remove the distance tube 3 Turn the pump and the flow ball valve by 180 degrees 4 Loosen the nut on the return ball valve and turn the ball valve through 180 degrees 5 Rotate the pump group by 180 degrees and tighten all connections and fittings The supply line is now on the left side 6 Tighten the loosened connections to the pump and bal...

Page 9: ... and retighten sealing connec tions 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 thermo...

Page 10: ...o the hot medium when emptying 8 4 Installation of the circulation pump 1 Replace damaged or defective seals if necessary 2 Insert the circulation pump and tighten the nuts X 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 nec...

Page 11: ... 5 Dismantle the thermostatic mixing valve A with tempera ture setting by loosening the union nuts X 8 6 Installation of the thermostatic mixing valve 1 Replace damaged or defective seals if necessary 2 Insert the thermostatic mixing valve A and tighten the nuts X for tightening torques see Technical data on page 4 3 Slowly open the ball valves by turning the thermometer handle 4 Restore the power...

Page 12: ...ble 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 9 1 Return shipment to the manufacturer Get in contact with the manufacturer if you would like to return the pump group...

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