Condensing Heat Exchanger Unit; Adjusting Co2 - Bosch C 1210 ES Installation Manual

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.
42
B Remove the condensing heat exchanger unit from
B Dismantle all parts for inspection and cleaning.
Fig. 67 Condensing heat exchanger
B Check the condensing heat exchanger for any
B Flush the condensing heat exchanger unit with water.
B Check all gasket and o-rings for damage and replace
B Assemble the condensate unit and all other parts in
6.5
The CO
technician with a calibrated CO
6720608836-01.1AL
Static Gas Pressure:
the appliance by pulling it towards you.
obstruction.
if necessary.
It is important to inspect and properly
i
replace the gaskets and o-rings.
reverse order of disassembly.
Adjusting CO
2
can only be adjusted by a certified gas
2
CO adjustment is required in Natural
2
i
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
CO levels is insufficient gas pressure.
2
Please see Chapter 3.14 for the
procedure to measure gas pressure
and record your findings below:
6720608836-03.1AL
analyzer.
2
" WC
6 720 644 887