Adjusting The Operating Pressure Of The Heating System; Replacing The Gas Valve - Bosch Condens 8300i W Installation And Maintenance Instructions Manual

▶ Press on the gasket in the required order.
When the gasket is correctly inserted, the pin is visible in the recess
and is flush with the top edge of the gasket.
Fig. 57 Pressing on the gasket
▶ Check the condensate hose and clean if required.
▶ Fill the condensate trap with approx. 250 ml water.
▶ Replace the condensate trap and check for tightness.
0
1.
Fig. 58 Install the condensate trap
9.16 Adjusting the operating pressure of the heating
system
Display on the pressure gauge
1 bar Minimum filling pressure when system is cold
1 - 2 bar Optimal filling pressure
3 bar The maximum operating pressure for the maximum
heating water temperature must not be exceeded,
otherwise the pressure-relief valve will open.
Table 29
If the indicator is below 1 bar when the system is cold:
▶ Fill the hose with water to prevent air entering the heating system.
▶ Top up the water until the indicator is between 1 bar and 2 bar again.
If pressure is not being maintained:
▶ Check the expansion vessel and heating system for leaks.
Condens 8300i W – 6721841533 (2022/12)
1.
2. 2.
3.
0010019159-002
3.
2.
0010020541-002
9.17

Replacing the gas valve

▶ Close the gas isolator.
1. Unscrew the bayonet connection.
2. Unscrew the union nut.
3. Remove the gas pipe.
1.
Fig. 59 Removing the gas pipe
1. Unplug the plug.
2. Unscrew the union nut.
Fig. 60 Unplugging the plug and unscrewing the union nut
1. Remove the 2 screws.
Inspection and maintenance
3.
2.
0010017782-001
1.
2.
0010017781-001
43