Commissioning; Supply Pressure; Setting The Co Content; Presetting For The Replacement Gas Valve Vgu 86S - BRÖTJE VGU 86 S Instrucciones De Montaje

4. Commissioning

4.1 Supply pressure

4.2 Setting the CO con-
2
tent
4.3 Presetting for the re-
placement gas valve
VGU 86S
WGB boilers
WGB / BGB / BBS 15
WGB / BGB / BBS / BSK 20 -
WGB-K 20/24
WGB / BGB / BBS 28
WGB / BGB 38
WGB 50
-
BBK 22
7717773-02 12.18
Supply pressure
The supply pressure must lie between the following values:
For natural gas: - min. 18 mbar
- max. 25 mbar
For liquefied gas: - min. 42.5 mbar
- max. 57.5 mbar
The supply pressure is measured as flow pressure at the measuring nozzle of the
gas valve.
The heating system must not be started up when the supply pressures are outside
the said range. The gas supply company should be informed.
The CO value is set by adjusting the jet pressure at the gas valve.
2
If the appliance is used in areas with fluctuating natural gas composition, the CO
content must be adjusted in accordance with the Wobbe index at any given time
(ask the gas supply company).
The CO content to be set can be decided as follows:
2
CO content = 8.5 - (W
2
- Gas type LL (natural gas L with Wobbe index W
- Gas type E (natural gas E with Wobbeindex W
Caution! Check the CO
The CO content for both full load and partial load must lie between the values that
2
are listed in the installation manual for the gas-fired condensing boiler.
Use the enclosed Torx 15 key to make adjustments.
The air quantity set in the factory must not be changed.
Note: Excessive CO
2
and damage to the burner. Insufficient CO
Export boilers Export boilers
WHBx WBx
- -
-
- -
- -
- -
- Moorea 50
Paramount 50
- Paramount 60
- -
- W ) × 0.5
oN ocurrentl
content at full load and partial load.
2
values may lead to unhygienic combustion (high CO values)
values may lead to ignition problems.
2
Max. heat
load
kW
15
20
24
28
38
50
58
22
Gas valve VGU 86 S
Commissioning
= 12.4 kWh/m
oN
= 15.0 kWh/m
oN
Number of turns of the full load
adjusting screw in the "-" direction
natural gas propane
13
12
11
11
6
2
2
12
2
3
)
3
)
16
15
14
14
9
5
5
15
29