Commissioning; Filling The Heating System; Purging The Gas Line; Inspecting The Flue System - Bosch Condens 5000W Installation And Maintenance Instructions Manual

Commissioning

8 Commissioning
WARNING:
Gas explosion.
▶ Check for gas tightness after carrying out work on gas-carrying
components.
▶ Complete the commissioning report during the commissioning
procedure ( Chapter 8.15).
8.1

Filling the heating system

NOTICE:
Boiler damage.
▶ Take the water quality into account when filling the heating system
( Chapter 5.2).
The target charge pressure of the heating system depends (among other
things) on the:
• location of the wall mounted gas condensing boiler
• opening pressure of the safety valve
• inlet pressure of the expansion vessel
▶ Take the above points (factors) into account when filling the heating
system.
During initial commissioning, the wall mounted gas condensing boiler is
brought into operation as soon as the operating pressure exceeds
0.8 bar.
If the pressure drops to below 0.2 bar, the wall mounted gas condensing
boiler will not subsequently go into operation.
▶ Open all radiator valves.
▶ Unscrew the cap of the automatic air vent valve ( Chapter 2.11,
figure 4) on the top of the heat exchanger on the left.
▶ Open the service valves ( Chapter 2.11, figure 4).
▶ Fill the heating system via the DFV.
▶ Fill the heating system to a minimum pressure of 3 bar and close the
filling valve.
▶ Bleed radiators.
▶ Fill the heating system again to a minimum pressure of 3 bar.
▶ Insert mains plug into an earthed electrical socket.
▶ Open gas isolation valve.
▶ Bring wall mounted gas condensing boiler into operation.
8.2

Purging the gas line

▶ Vent the gas line.
8.3

Inspecting the flue system

WARNING:
flue gas poisoning.
▶ Check for leaks before working on gas-carrying components.
▶ Check whether the wall mounted gas condensing boiler is connected
to a flue system as specified in the flue pipe documentation provided.
8.4

Adjusting the output

The output of the wall mounted gas condensing boiler can be adapted to
the heat energy demand via the setup menu. Proceed as follows:
22
▶ Adjusting the output via the setup menu ( Chapter 7.2).
Observe the following table when making the adjustment.
Display
[%]
L20
L25
L30
L35
L40
L45
L50
L55
L60
L65
L70
L75
L80
L85
L90
L95
L – –
Table 11 Output as a percentage [kW]
8.5

Setting the maximum boiler temperature

▶ Adjust the maximum set flow temperature in the setup menu
( Chapter 7.2).
8.6

Adjusting the pump connection set

In order for the heating system to function correctly the pump must be
controlled by the burner control unit. To do so, the pump setting must be
set to the medium level.
▶ Set the pump via the red knob on the front to medium level, "Ext. in".
▶ Adjust the pump run-on time in the setup menu ( Chapter 7.2).
8.7

Testing the gas supply pressure

Measure the gas supply pressure when the burner is in operation at full
load. Proceed as follows:
▶ Take the wall mounted gas condensing boiler out of operation.
▶ Remove the casing.
▶ Close gas isolation valve.
▶ Make sure the heating system can release its heat.
▶ Undo the test nipple for the gas supply pressure [1] by turning it
through 2 revolutions.
Fig. 42 Open the burner pressure nipple at the type 70
Condens 5000W – 6720813952 (2019/02)
Device type
Type 70 Type 100
14.3 20.8
17.8 25.7
21.2 30.6
24.7 35.6
28.1 40.5
31.6 45.4
35.0 50.3
38.5 55.2
41.9 60.2
45.4 65.1
48.8 70.0
52.3 74.9
55.7 79.8
59.2 84.7
62.6 89.7
66.5 94.6
69.5 99.5
0010010025-001
1