Bosch C1210ES Specifications download pdf (Page 42)

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Maintenance and service

13. Disconnect all lines and drain all solution from heat

exchanger. Properly discard of solution.

14. Position a container below the hot water outlet and

connect cold water supply. Open cold water

supply shutoff valve and flush heat exchanger with

clean water.

15. Shut cold water shutoff valve and reconnect hot

water supply to the water heater.

16. Reconnect electrical supply to unit, open water

shutoff valves, and return the unit to service.

Fig. 65

6.4 Condensing heat exchanger unit

The condensing heat exchanger unit must be checked

once a year by a qualified and trained technician. If

repairs are needed, the repairs should be done by a cer-

tified Bosch technician.

Fig. 66 Condensing heat exchanger unit

Condensing heat exchanger unit maintenance:

B Shut off power. Disconnect power cord.

B Dismantle all inlet, outlet pipes and the condensate

tube from the condensing heat exchanger unit.

B Remove the condensing heat exchanger unit from

the appliance by pulling it towards you.

B Dismantle all parts for inspection and cleaning.

Fig. 67 Condensing heat exchanger

B Check the condensing heat exchanger for any

obstruction.

B Flush the condensing heat exchanger unit with water.

B Check all gasket and o-rings for damage and replace

if necessary.

B Assemble the condensate unit and all other parts in

reverse order of disassembly.

6.5 Adjusting CO

The CO

can only be adjusted by a certified gas

technician with a calibrated CO

analyzer.

Static Gas Pressure: “ WC

6720608836-01.1AL

It is important to inspect and properly

replace the gaskets and o-rings.

adjustment is required in Natural

Gas installations where energy content

is less than 900 BTU/cuft, and in

installations with repeated unresolved

EA and EC errors (ref. to page 50

“Problem solving”).

Caution: One factor that may affect

levels is insufficient gas pressure.

Please see Chapter 3.14 for the

procedure to measure gas pressure

and record your findings below:

6720608836-03.1AL

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Bosch C1210ES Specifications Page 42

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