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KLSC20-KLSC25-KLSC32-IM-DE-W-UK-08-2021-Rev.0 | Part no. 10084836

EN

ENGLISH

8.5   Removing the 3-way mixing valve

1.  Disconnect the power supply and secure against 

reconnection.

2.  Remove the boiler charging unit (A) front cover.
3.  Close all shut-off valves by rotating the thermometer 

handle.

4.  Remove the thermometer handles (B) and the intermediate 

insulation (C).

5.   Move the regulating insert (spindle) to centre position using 

the lever on the actuator.

6.  Remove the actuator (S).
7.  Remove the mixer (M) by loosening the union nuts (X).

 

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Instructions for fitting/removing the actuator can be 
found in the relevant manufacturer’s manual.

8.6  Fitting the 3-way mixing valve

1.  Replace the seals on the screw connections.
2.  Insert the 3-way mixing valve (M) and tighten the nuts (see 

Chapter 3 on page 4 for tightening torques).

3.  Fit the actuator (S).
4.  Slowly open the ball valve by turning the thermometer 

handle (B). 

5.  Reconnect the power supply to the boiler charging unit.
6.  Remove the thermometer handles (B).
7.  Fit the intermediate insulation (C), thermometer handles (B) 

and front cover (A).

 

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Instructions for fitting/removing the actuator can be 
found in the relevant manufacturer’s manual.

X

X

S

M

Fig. 8-2: Removing and fitting the 3-way mixing valve

8.7  3-way mixing valve actuator settings for 

KLSC20

NOTICE

When reinstalling the actuator, make sure

the bearing shaft is in the correct position.

When setting up the regulating insert (spindle) for the first time, 
refer to the images below.

Mixing valve open

Mixing valve closed

Fig. 8-3: Regulating insert (spindle) settings for KLSC20

8.8   3-way mixing valve actuator settings for 

KLSC25 and KLSC32

NOTICE

When reinstalling the actuator, make sure

the bearing shaft is in the correct position.

When setting up the regulating insert (spindle) for the first time, 
refer to the images below.

Mixing valve open

Mixing valve closed

Fig. 8-4: Regulating insert (spindle) settings for KLSC25 and KLSC32

Summary of Contents for KLSC Series

Page 1: ...5 and DN32 boiler charging units with electronic fixed point control for systems with solid fuel boilers Installation and operating manual translated from the original operating manual WattsWater eu K...

Page 2: ...orms to the 2006 42 EC machinery directive 1 3 Product features Stable wall bracket with fixings 3 part patented EPP insulation shell Compact space saving design Contents 1 General information 2 1 1 I...

Page 3: ...ful substances The boiler charging unit is fully pre assembled and is designed for wall mounting The boiler charging unit is not intended for use by persons including children with reduced physical se...

Page 4: ...Boiler top 1 M flat sealing 1 2 M flat sealing 2 M flat sealing Tank bottom 1 M flat sealing 11 2 M flat sealing 11 2 M flat sealing 2 x screw fitting top connection 1 1 2 union nut x 1 F 2 union nut...

Page 5: ...DE W UK 08 2021 Rev 0 Part no 10084836 EN ENGLISH 4 Pressure loss diagram 1 10 100 1 000 100 1 000 10 000 100 000 Pressure loss mbar Volume flow rate l h KLSC20 KLSC25 KLSC32 Fig 4 1 Pressure loss dia...

Page 6: ...5 14 343 5 65 Rp1 Rp1 65 65 G1 G1 G1 G1 G1 G1 90 71 71 10 293 7 G1 G1 300 125 12 5 15 342 5 310 370 232 G1 G1 125 300 370 240 5 240 5 217 12 5 14 343 5 65 Rp1 Rp1 65 65 G1 G1 G1 G1 G1 G1 90 71 71 10...

Page 7: ...6 2 KLSC25 and KLSC32 construction 1 Ball valve with gravity brake1 return 2 Ball valve supply 3 Circulation pump 4 Actuator including regulator 5 3 way mixing valve 6 Bypass pipe 7 Wall bracket 8 Sen...

Page 8: ...ng unit may only be installed and commissioned by specialist personnel who have been duly trained and authorised by the manufacturer CAUTION When carrying out repairs and replacing parts the prescribe...

Page 9: ...charging unit vertically on the wall 7 For KLSC25 and KLSC32 only Fix 2 screws into the wall plugs 8 Remove the thermometer handles B and the intermediate insulation C 9 Connect the supply and return...

Page 10: ...s now on the right hand side 5 Loosen the connection to the ball valve rotate the return line and then tighten the connection to the ball valve again 6 Remove the end cap from the 3 way mixing valve a...

Page 11: ...e thermowell and the end cap 3 Rotate the pump and the return ball valve by 180 degrees 4 Loosen the nut on the supply ball valve and rotate by 180 degrees Remove the actuator from the 3 way mixing va...

Page 12: ...a firm seating and retighten if necessary Remove all tools materials and other equipment used from the work area Bleed the system 8 2 Replacing wear parts Note that the boiler charging unit has parts...

Page 13: ...lve by turning the thermometer handle B 5 Reconnect the power supply to the boiler charging unit 6 Remove the thermometer handles B 7 Fit the intermediate insulation C thermometer handles B and front...

Page 14: ...e may be asserted within one 1 year of delivery transfer of risk Excluded from the warranty are damages attributable to normal use of the product or wear and damages resulting from modifications or no...

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