User Manual

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3. The remaining water can be drained off via the drain valve (item 10).
4. Disconnect the heating element in the control unit and lead it through the cable gland. Note the wiring diagram!
5. Unscrew the heating element from the stainless steel flow tube. Make sure that the tool used is only applied to the stainless steel spanner
width SW 70. The heating element is glued in place with a low-strength thread seal.
6. If necessary, remove coarse dirt from the heating coil and flow tube with a brush.
Important!
7. Place the heating element in a bucket of descaling agent. The filling height of the bucket should be chosen so that only the heating coil
is covered with the descaling agent. Depending on the degree of calcification, adjust the exposure time to the descaling agent (follow the
manufacturer's instructions).
8. Rinse the flow tube and heating coil with clear water.
9. Remove any adhesive residue from the threads on the flow tube and the heating element.
10. Seal the heating element again in reverse order. Observe the drying time.
11. The following liquid thread sealant is recommended: Loxeal 18-10
12. Feed the cable of the heating element through the cable gland and connect it to the control unit. Note the wiring diagram!
13. Close the shut-off valve on the bypass pipe.
14. Open the shut-off valve (item 7) before and after the C10 circulation pump.
15. Carry out the bleed procedure according to Section 6.8.
16. Reconnect the unit to the mains voltage and put it into operation.
8.2 Maintenance intervals
Unit in operation Daily Weekly Monthly
Half-yearly / before
each heating period
Check the function of the unit during operation. x
Is the water circulating and is the heating element heating? x
Inspect the entire unit. x
Bleed the unit and ring pipe according to Section 6.8. x x x
Check the unit for limescale and, if necessary, descale and
clean it according to Section 8.1.
x x
Clean the outside of the unit. x x
Check electrical components and connection cables for da-
mage.
x
Unit out of operation Daily Weekly Monthly
Half-yearly / before
each heating period
Check the free running of the circulation pump. To do this, set
the selector switch to position 1 and check circulation in the
ring pipe.
x
Clean the outside of the unit. x
9. Malfunctions and troubleshooting
Fault Cause Corrective measure
Unit does not start
No power supply • Check power supply
Fuse defective • Check fuse
Residual current circuit breaker has
tripped
• Check cause and rectify error
• Switch on the residual current circuit breaker again
Pump won’t start
No power supply • Check power supply
For further error messages, see the operating instructions for the circulating pump
Loud noises
Air in the unit • Bleed the unit
Air in the pump Bleed the pump
Cavitation due to insufficient supply
pressure
• Increase system pressure within the permissible range