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EN
ENGLISH
HK-HKM-25-32-IM-DE-W-UK-03-2021-Rev.3 | Part no. 10025988
8 Maintenance
!
DANGER
Electrical energy!
Perform maintenance work on the pump group only when
the power supply has been disconnected.
!
!
WARNING
Hot water!
Risk of severe scalding.
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.
!
!
WARNING
Hot surfaces!
Risk of serious burns.
Do not touch the pipes or components during operation.
Ensure that the pump group has cooled down before carry-
ing out maintenance, cleaning and repair work.Wear heat-re-
sistant safety gloves if it is necessary to carry out work on
hot components.
NOTICE
Maintenance of the pump group must be
carried out only by trained personnel who have been author-
ized by the manufacturer.
8.1 Annual maintenance intervals
1. General visual inspections
• Check the station for leaks 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 valves
• Check that stop valves and ball taps can move freely.
4. Pump
• Pay attention to the noise of the pump.
5. 3-way mixer
• Check 3-way mixer for function.
6. Motor
• Check the motor for function.
7. 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.
8.2 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.
8.3 Disassembling the circulation pump
1. Disconnect the power supply and secure it against being
switched on again.
2. Remove the front panel (A) of the pump group.
3. Close all stop valves.
4. Disassemble thermometer handles (B) and intermediate
insulation (C).
5. Disconnect the wiring of the circulation pump (D).
6. Release the fastening nuts (X) and remove the circulation
pump.
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) (See
3. Connect the wiring of the circulation pump (D).
4. Slowly open the ball valves by turning the thermometer
handle (B).
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 (B).
9. Install the intermediate insulation (C), the thermometer
handles(B), and the front panel (A).
C
A
B
B
X
D
Fig. 8-1: Dismantling and assembly of the circulation pump
