Commissioning; Filling The Heating System; Purging The Gas Line; Inspecting The Flue System - Bosch Worcester GB162-50 V2 Installation, Commissioning And Servicing Instructions
Commercial boiler series, wall hung gas fired condensing boiler for central heating systems and indirect fed domestic hot water
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Commissioning
8
Commissioning
WARNING: Gas explosion.
▶ Check for gas tightness after carrying out work on
gas-carrying components.
▶ The Benchmark Checklist ( page 50) must be completed for all
50-V2 and 65-V2 installations.
▶ Complete the commissioning report for type 85-V2 and 100-V2
installations during the commissioning procedure ( Chapter 8.15,
page 37).
8.1
Filling the heating system
NOTICE: Boiler damage.
▶ Take the water quality into account when filling the
heating system ( Chapter 3.2).
The target charge pressure of the heating system
depends (among other things) on the:
• location of the 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 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
boiler will not subsequently go into operation.
▶ Open all radiator valves.
▶ Unscrew the cap of the automatic air vent valve ( Chapter 2.12,
figure 4) on the top of the heat exchanger on the left.
▶ Open the hydraulic isolation valves ( Chapter 2.12, figure 4).
▶ Fill the heating system via a WRAS approved filling method.
▶ 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.
▶ Turn on the earthed electrical supply.
▶ Open gas isolation valve.
8.2
Purging the gas line
▶ Purge air from the gas supply pipe work in a safe appropriate manner.
▶ Ensure adequate ventilation during the purge and that other persons
nearby are briefed that a gas purge is in operation.
▶ Bring the boiler into operation.
8.3
Inspecting the flue system
WARNING: flue gas poisoning.
▶ Check for leaks before working on gas-carrying
components.
▶ Check whether the boiler is connected to a flue system as specified
in the flue pipe documentation provided.
32
8.4
Adjusting the output
The output of the boiler can be adapted to the heat energy demand via
the setup menu. Proceed as follows:
▶ Adjusting the output via the setup menu ( Chapter 7.2).
Observe the following table when making the adjustment.
Display
[%]
50-V2
65-V2
20
–
14.3
25
–
17.8
30
14.3
21.2
35
16.8
24.7
40
19.4
28.1
45
21.9
31.6
50
24.5
35.0
55
27.0
38.5
60
29.6
41.9
65
32.1
45.4
70
34.6
48.8
75
37.2
52.3
80
39.7
55.7
85
42.3
59.2
90
44.8
62.6
95
47.4
66.5
– –
49.9
69.5
Table 16 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 group
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 boiler out of operation.
▶ Remove the casing.
▶ Close gas isolation valve.
▶ Make sure the heating system can dissipate the heat generated.
Boiler type
85-V2
100-V2
–
20.8
20.8
25.7
25.0
30.6
29.3
35.6
33.5
40.5
37.8
45.4
42.0
50.3
46.3
55.2
50.5
60.2
54.8
65.1
59.0
70.0
63.3
74.9
67.5
79.8
71.8
84.7
76.0
89.7
80.3
94.6
84.5
99.5
6720814332 (2018/04)
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