Checking For Gas Leaks During Operation - Bosch Condens 8300i W Installation And Maintenance Instructions Manual

▶ Check for gas tightness.
Fig. 32 Refit combustion casing
▶ Refit the combustion casing.
▶ Ensure this cover is engaged onto top bracket [1] before securing
screw [3].
Gas pressure within the system
The appliance must be running at maximum output rate when
performing the gas rate check ( chapter 7.5).
Combi appliances
▶ Running a hot water tap does not guarantee the boiler will operate at
maximum output throughout the test.
Gas type Design
pressure
[mbar]
NG (23) 11.3
1)
LPG (propane) 27.5
LPG (butane) 27.5
1) Standard figure for LPG with fixed cylinders with capacities up to 15 000 l
Table 16 Permissible gas supply pressure
If the pressure drops are greater than shown below, then this would
indicate a problem with the pipe work or connections within the system.
NOTICE
Do not continue commissioning until the correct gas pressure is
achieved.
Condens 8300i W – 6721841533 (2022/12)
1.
2.
3.
0010023566-001
Permissible pressure range at
maximum rated output
[mbar] [kPA]
11 – 30 1.1 – 3.0
25 – 45 2.5 – 4.5
25 – 35 2.5 – 3.5
▶ Set the chimney sweep mode and start up the appliance at maximum
rated output.
▶ Where a gas meter is not available (e.g. LPG) the CO/CO
checked to the units shown in the setting of the air/gas ratio.
▶ If pressure and gas rate are satisfactory press the ok key or the d key
and the boiler will return to normal operation.
7.8

Checking for gas leaks during operation

▶ Use an approved gas sniffer or leak detection fluid to check all
connections for possible leaks. Leak detection fluid must be certified
as a gas leak testing agent.
▶ Do not allow leak detection fluid to come into contact with the
electrical components.
Commissioning
must be
2
25