Bosch Installation Manual

Inspection and maintenance
69
Greenstar – 6721822579 (2021/01)
▶ Rinse the heat exchanger with water from the top.
Fig. 96 Rinsing the heat exchanger
▶ Clean the condensate tray (with reversed brush).
Fig. 97 Cleaning the condensate tray
▶ Rinse the heat exchanger with water from the top.
▶ Clean the condensate trap connection.
▶ Close the inspection opening again using a new gasket and tighten
the screws with a torque between 4.1 ft-lbs (5.5 Nm) and 5.1 ft-lbs
(7.0 Nm).
15.1.7 Cleaning condensate trap
▶ Remove condensate trap (steps 1 and 2) and check heat exchanger
orifice for clear passage.
Fig. 98 Removing the condensate trap
▶ Remove and clean the condensate trap lid.
▶ Check condensate hose and clean if necessary.
▶ Fill the condensate trap with approx. 1 cup (1/4 l) of water and
reinstall it.
15.1.8 Checking the mixer diaphragm
▶ Open the mixer unit.
▶ Carefully remove the diaphragm from the fan air intake and check for
contamination and cracks.
Fig. 99 Opening the mixer unit
▶ Insert the diaphragm into the fan connector.
The diaphragm flaps must open upwards.
▶Close the mixer unit.
6 720 612 664-18.1R
2
6 720 610 332-75.2R
6 720 641 933-93.1o
1
2
1
2
3
6 720 641 933-94.1o